Add new frontend - fix 2

frontend/package.json

@@ -22,7 +22,8 @@
     "zustand": "^4.4.6",
     "@headlessui/react": "^2.0.0",
     "@heroicons/react": "^2.0.18",
-    "framer-motion": "^10.16.4"
+    "framer-motion": "^10.16.4",
+    "jwt-decode": "^4.0.0"
   },
   "devDependencies": {
     "@types/node": "^20.8.0",

frontend/src/api/base/apiClient.ts

@@ -322,128 +322,3 @@ class ApiClient {
 export const apiClient = new ApiClient({
   baseURL: process.env.REACT_APP_API_URL || 'http://localhost:8000/api'
 });
-
-// src/api/base/circuitBreaker.ts
-export class CircuitBreaker {
-  private failures: number = 0;
-  private lastFailureTime: number = 0;
-  private state: 'CLOSED' | 'OPEN' | 'HALF_OPEN' = 'CLOSED';
-  
-  constructor(
-    private threshold: number = 5,
-    private timeout: number = 60000 // 1 minute
-  ) {}
-
-  async execute<T>(fn: () => Promise<T>): Promise<T> {
-    if (this.state === 'OPEN') {
-      if (Date.now() - this.lastFailureTime > this.timeout) {
-        this.state = 'HALF_OPEN';
-      } else {
-        throw new Error('Circuit breaker is OPEN');
-      }
-    }
-
-    try {
-      const result = await fn();
-      this.onSuccess();
-      return result;
-    } catch (error) {
-      this.onFailure();
-      throw error;
-    }
-  }
-
-  private onSuccess(): void {
-    this.failures = 0;
-    this.state = 'CLOSED';
-  }
-
-  private onFailure(): void {
-    this.failures++;
-    this.lastFailureTime = Date.now();
-    
-    if (this.failures >= this.threshold) {
-      this.state = 'OPEN';
-    }
-  }
-
-  getState(): string {
-    return this.state;
-  }
-}
-
-// src/api/services/index.ts
-import { apiClient } from '../base/apiClient';
-import { AuthService } from './authService';
-import { TrainingService } from './trainingService';
-import { ForecastingService } from './forecastingService';
-import { DataService } from './dataService';
-import { TenantService } from './tenantService';
-
-// Service instances with circuit breakers
-export const authService = new AuthService(apiClient);
-export const trainingService = new TrainingService(apiClient);
-export const forecastingService = new ForecastingService(apiClient);
-export const dataService = new DataService(apiClient);
-export const tenantService = new TenantService(apiClient);
-
-// Export types
-export * from '../types';
-
-// src/components/common/ErrorBoundary.tsx
-import React, { Component, ErrorInfo, ReactNode } from 'react';
-
-interface Props {
-  children: ReactNode;
-  fallback?: ReactNode;
-}
-
-interface State {
-  hasError: boolean;
-  error: Error | null;
-}
-
-export class ErrorBoundary extends Component<Props, State> {
-  state: State = {
-    hasError: false,
-    error: null
-  };
-
-  static getDerivedStateFromError(error: Error): State {
-    return { hasError: true, error };
-  }
-
-  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
-    console.error('ErrorBoundary caught:', error, errorInfo);
-    
-    // Send error to monitoring service
-    if (process.env.NODE_ENV === 'production') {
-      // logErrorToService(error, errorInfo);
-    }
-  }
-
-  render() {
-    if (this.state.hasError) {
-      return this.props.fallback || (
-        <div className="min-h-screen flex items-center justify-center">
-          <div className="text-center">
-            <h1 className="text-2xl font-bold text-gray-900 mb-4">
-              Algo salió mal
-            </h1>
-            <p className="text-gray-600 mb-6">
-              Ha ocurrido un error inesperado. Por favor, recarga la página.
-            </p>
-            <button
-              onClick={() => window.location.reload()}
-              className="px-4 py-2 bg-indigo-600 text-white rounded-md hover:bg-indigo-700"
-            >
-              Recargar página
-            </button>
-          </div>
-        </div>
-      );
-    }
-
-    return this.props.children;
-  }
-}

frontend/src/api/base/circuitBreaker.ts

@@ -0,0 +1,48 @@
+// src/api/base/circuitBreaker.ts
+export class CircuitBreaker {
+  private failures: number = 0;
+  private lastFailureTime: number = 0;
+  private state: 'CLOSED' | 'OPEN' | 'HALF_OPEN' = 'CLOSED';
+  
+  constructor(
+    private threshold: number = 5,
+    private timeout: number = 60000 // 1 minute
+  ) {}
+
+  async execute<T>(fn: () => Promise<T>): Promise<T> {
+    if (this.state === 'OPEN') {
+      if (Date.now() - this.lastFailureTime > this.timeout) {
+        this.state = 'HALF_OPEN';
+      } else {
+        throw new Error('Circuit breaker is OPEN');
+      }
+    }
+
+    try {
+      const result = await fn();
+      this.onSuccess();
+      return result;
+    } catch (error) {
+      this.onFailure();
+      throw error;
+    }
+  }
+
+  private onSuccess(): void {
+    this.failures = 0;
+    this.state = 'CLOSED';
+  }
+
+  private onFailure(): void {
+    this.failures++;
+    this.lastFailureTime = Date.now();
+    
+    if (this.failures >= this.threshold) {
+      this.state = 'OPEN';
+    }
+  }
+
+  getState(): string {
+    return this.state;
+  }
+}

frontend/src/api/cache.ts

@@ -1,76 +0,0 @@
-// frontend/dashboard/src/api/cache.ts
-/**
- * Simple in-memory cache for API responses
- */
-
-interface CacheEntry<T> {
-  data: T;
-  timestamp: number;
-  ttl: number;
-}
-
-class ApiCache {
-  private cache = new Map<string, CacheEntry<any>>();
-  
-  set<T>(key: string, data: T, ttl: number = 300000): void { // 5 minutes default
-    this.cache.set(key, {
-      data,
-      timestamp: Date.now(),
-      ttl,
-    });
-  }
-  
-  get<T>(key: string): T | null {
-    const entry = this.cache.get(key);
-    
-    if (!entry) {
-      return null;
-    }
-    
-    if (Date.now() - entry.timestamp > entry.ttl) {
-      this.cache.delete(key);
-      return null;
-    }
-    
-    return entry.data;
-  }
-  
-  delete(key: string): void {
-    this.cache.delete(key);
-  }
-  
-  clear(): void {
-    this.cache.clear();
-  }
-  
-  has(key: string): boolean {
-    const entry = this.cache.get(key);
-    if (!entry) return false;
-    
-    if (Date.now() - entry.timestamp > entry.ttl) {
-      this.cache.delete(key);
-      return false;
-    }
-    
-    return true;
-  }
-}
-
-export const apiCache = new ApiCache();
-
-// Cache helper for API client
-export function withCache<T>(
-  key: string,
-  fetcher: () => Promise<T>,
-  ttl?: number
-): Promise<T> {
-  const cached = apiCache.get<T>(key);
-  if (cached) {
-    return Promise.resolve(cached);
-  }
-  
-  return fetcher().then(data => {
-    apiCache.set(key, data, ttl);
-    return data;
-  });
-}

frontend/src/api/config.ts

@@ -1,70 +0,0 @@
-// frontend/dashboard/src/api/config.ts
-/**
- * API configuration and constants
- */
-
-export const API_CONFIG = {
-  BASE_URL: process.env.REACT_APP_API_URL || 'http://localhost:8000',
-  TIMEOUT: 10000,
-  RETRY_ATTEMPTS: 3,
-  RETRY_DELAY: 1000,
-} as const;
-
-export const ENDPOINTS = {
-  AUTH: {
-    LOGIN: '/auth/login',
-    REGISTER: '/auth/register',
-    LOGOUT: '/auth/logout',
-    REFRESH: '/auth/refresh',
-    PROFILE: '/auth/me',
-    CHANGE_PASSWORD: '/auth/change-password',
-    PASSWORD_RESET: '/auth/password-reset',
-  },
-  TRAINING: {
-    TRAIN: '/training/train',
-    STATUS: '/training/status',
-    JOBS: '/training/jobs',
-    MODELS: '/training/models',
-    PROGRESS_WS: '/training/progress',
-  },
-  FORECASTING: {
-    FORECASTS: '/forecasting/forecasts',
-    GENERATE: '/forecasting/generate',
-    PERFORMANCE: '/forecasting/performance',
-  },
-  DATA: {
-    SALES: '/data/sales',
-    SALES_UPLOAD: '/data/sales/upload',
-    SALES_ANALYTICS: '/data/sales/analytics',
-    WEATHER: '/data/weather',
-    TRAFFIC: '/data/traffic',
-    SYNC: '/data/sync',
-    QUALITY: '/data/quality',
-  },
-  TENANTS: {
-    CURRENT: '/tenants/current',
-    NOTIFICATIONS: '/tenants/notifications',
-    STATS: '/tenants/stats',
-  },
-} as const;
-
-export const HTTP_STATUS = {
-  OK: 200,
-  CREATED: 201,
-  NO_CONTENT: 204,
-  BAD_REQUEST: 400,
-  UNAUTHORIZED: 401,
-  FORBIDDEN: 403,
-  NOT_FOUND: 404,
-  CONFLICT: 409,
-  INTERNAL_SERVER_ERROR: 500,
-  SERVICE_UNAVAILABLE: 503,
-} as const;
-
-export const STORAGE_KEYS = {
-  ACCESS_TOKEN: 'access_token',
-  REFRESH_TOKEN: 'refresh_token',
-  USER_PROFILE: 'user_profile',
-  THEME: 'theme',
-  LANGUAGE: 'language',
-} as const;

frontend/src/api/hooks/useApi.ts

@@ -1,92 +0,0 @@
-// frontend/dashboard/src/api/hooks/useApi.ts
-/**
- * React hooks for API state management
- */
-
-import { useState, useEffect, useCallback } from 'react';
-import { ApiError } from '../../types/api';
-
-export interface ApiState<T> {
-  data: T | null;
-  loading: boolean;
-  error: ApiError | null;
-}
-
-export function useApi<T>(
-  apiCall: () => Promise<T>,
-  dependencies: any[] = []
-): ApiState<T> & {
-  refetch: () => Promise<void>;
-  reset: () => void;
-} {
-  const [state, setState] = useState<ApiState<T>>({
-    data: null,
-    loading: false,
-    error: null,
-  });
-
-  const execute = useCallback(async () => {
-    setState(prev => ({ ...prev, loading: true, error: null }));
-    
-    try {
-      const data = await apiCall();
-      setState({ data, loading: false, error: null });
-    } catch (error) {
-      setState({
-        data: null,
-        loading: false,
-        error: error as ApiError,
-      });
-    }
-  }, dependencies);
-
-  const reset = useCallback(() => {
-    setState({ data: null, loading: false, error: null });
-  }, []);
-
-  useEffect(() => {
-    execute();
-  }, [execute]);
-
-  return {
-    ...state,
-    refetch: execute,
-    reset,
-  };
-}
-
-export function useAsyncAction<T, P extends any[] = []>(
-  action: (...params: P) => Promise<T>
-): {
-  execute: (...params: P) => Promise<T>;
-  loading: boolean;
-  error: ApiError | null;
-  reset: () => void;
-} {
-  const [loading, setLoading] = useState(false);
-  const [error, setError] = useState<ApiError | null>(null);
-
-  const execute = useCallback(async (...params: P) => {
-    setLoading(true);
-    setError(null);
-    
-    try {
-      const result = await action(...params);
-      setLoading(false);
-      return result;
-    } catch (err) {
-      const apiError = err as ApiError;
-      setError(apiError);
-      setLoading(false);
-      throw apiError;
-    }
-  }, [action]);
-
-  const reset = useCallback(() => {
-    setLoading(false);
-    setError(null);
-  }, []);
-
-  return { execute, loading, error, reset };
-}
-

frontend/src/api/hooks/useSessionTimeout.ts

@@ -0,0 +1,71 @@
+// src/hooks/useSessionTimeout.ts
+import { useEffect, useRef } from 'react';
+import { useAuth } from '../contexts/AuthContext';
+
+interface SessionTimeoutOptions {
+  timeout: number; // milliseconds
+  onTimeout?: () => void;
+  warningTime?: number; // Show warning before timeout
+  onWarning?: () => void;
+}
+
+export const useSessionTimeout = ({
+  timeout = 30 * 60 * 1000, // 30 minutes default
+  onTimeout,
+  warningTime = 5 * 60 * 1000, // 5 minutes warning
+  onWarning
+}: SessionTimeoutOptions) => {
+  const { logout } = useAuth();
+  const timeoutRef = useRef<NodeJS.Timeout>();
+  const warningRef = useRef<NodeJS.Timeout>();
+
+  const resetTimeout = () => {
+    // Clear existing timeouts
+    if (timeoutRef.current) clearTimeout(timeoutRef.current);
+    if (warningRef.current) clearTimeout(warningRef.current);
+
+    // Set warning timeout
+    if (warningTime && onWarning) {
+      warningRef.current = setTimeout(() => {
+        onWarning();
+      }, timeout - warningTime);
+    }
+
+    // Set session timeout
+    timeoutRef.current = setTimeout(() => {
+      if (onTimeout) {
+        onTimeout();
+      } else {
+        logout();
+      }
+    }, timeout);
+  };
+
+  useEffect(() => {
+    // Activity events to reset timeout
+    const events = ['mousedown', 'keypress', 'scroll', 'touchstart'];
+    
+    const handleActivity = () => {
+      resetTimeout();
+    };
+
+    // Add event listeners
+    events.forEach(event => {
+      document.addEventListener(event, handleActivity);
+    });
+
+    // Start timeout
+    resetTimeout();
+
+    // Cleanup
+    return () => {
+      events.forEach(event => {
+        document.removeEventListener(event, handleActivity);
+      });
+      if (timeoutRef.current) clearTimeout(timeoutRef.current);
+      if (warningRef.current) clearTimeout(warningRef.current);
+    };
+  }, [timeout, warningTime]);
+
+  return { resetTimeout };
+};

frontend/src/api/hooks/useTrainingProgress.ts

@@ -0,0 +1,83 @@
+// src/hooks/useTrainingProgress.ts
+import { useState, useEffect } from 'react';
+import { useWebSocket } from '../hooks/useWebSocket';
+
+export interface TrainingProgress {
+  job_id: string;
+  status: 'pending' | 'running' | 'completed' | 'failed';
+  progress: number;
+  current_step: string;
+  total_steps: number;
+  estimated_time_remaining?: number;
+  metrics?: Record<string, any>;
+}
+
+export interface TrainingProgressUpdate {
+  type: 'training_progress' | 'training_completed' | 'training_error';
+  job_id: string;
+  progress?: TrainingProgress;
+  results?: any;
+  error?: string;
+}
+
+export const useTrainingProgress = (jobId: string | null) => {
+  const [progress, setProgress] = useState<TrainingProgress | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const [isComplete, setIsComplete] = useState(false);
+
+  const handleMessage = (data: TrainingProgressUpdate) => {
+    switch (data.type) {
+      case 'training_progress':
+        setProgress(data.progress!);
+        setError(null);
+        break;
+      
+      case 'training_completed':
+        setProgress(prev => ({
+          ...prev!,
+          status: 'completed',
+          progress: 100
+        }));
+        setIsComplete(true);
+        break;
+      
+      case 'training_error':
+        setError(data.error || 'Training failed');
+        setProgress(prev => prev ? { ...prev, status: 'failed' } : null);
+        break;
+    }
+  };
+
+  const { isConnected } = useWebSocket({
+    endpoint: jobId ? `/training/progress/${jobId}` : '',
+    onMessage: handleMessage,
+    onError: () => setError('Connection lost'),
+    autoConnect: !!jobId
+  });
+
+  // Fetch initial status when job ID changes
+  useEffect(() => {
+    if (jobId) {
+      fetchTrainingStatus(jobId);
+    }
+  }, [jobId]);
+
+  const fetchTrainingStatus = async (id: string) => {
+    try {
+      const response = await fetch(`/api/training/status/${id}`);
+      if (response.ok) {
+        const data = await response.json();
+        setProgress(data);
+      }
+    } catch (err) {
+      console.error('Failed to fetch training status:', err);
+    }
+  };
+
+  return {
+    progress,
+    error,
+    isComplete,
+    isConnected
+  };
+};

frontend/src/api/hooks/useWebSocket.ts

@@ -0,0 +1,72 @@
+// src/hooks/useWebSocket.ts
+import { useEffect, useRef, useCallback } from 'react';
+import { wsManager, WebSocketHandlers } from '../websocket/WebSocketManager';
+
+export interface UseWebSocketOptions {
+  endpoint: string;
+  onMessage: (data: any) => void;
+  onError?: (error: Event) => void;
+  onConnect?: () => void;
+  onDisconnect?: () => void;
+  onReconnect?: () => void;
+  autoConnect?: boolean;
+}
+
+export const useWebSocket = ({
+  endpoint,
+  onMessage,
+  onError,
+  onConnect,
+  onDisconnect,
+  onReconnect,
+  autoConnect = true
+}: UseWebSocketOptions) => {
+  const wsRef = useRef<WebSocket | null>(null);
+
+  const connect = useCallback(async () => {
+    if (wsRef.current) return;
+
+    const handlers: WebSocketHandlers = {
+      onOpen: onConnect,
+      onMessage,
+      onError,
+      onClose: onDisconnect,
+      onReconnect
+    };
+
+    try {
+      wsRef.current = await wsManager.connect(endpoint, handlers);
+    } catch (error) {
+      console.error('WebSocket connection failed:', error);
+      onError?.(new Event('Connection failed'));
+    }
+  }, [endpoint, onMessage, onError, onConnect, onDisconnect, onReconnect]);
+
+  const disconnect = useCallback(() => {
+    if (wsRef.current) {
+      wsManager.disconnect(endpoint);
+      wsRef.current = null;
+    }
+  }, [endpoint]);
+
+  const send = useCallback((data: any) => {
+    wsManager.send(endpoint, data);
+  }, [endpoint]);
+
+  useEffect(() => {
+    if (autoConnect) {
+      connect();
+    }
+
+    return () => {
+      disconnect();
+    };
+  }, [autoConnect, connect, disconnect]);
+
+  return {
+    connect,
+    disconnect,
+    send,
+    isConnected: wsManager.isConnected(endpoint)
+  };
+};

frontend/src/api/index.ts

@@ -1,35 +0,0 @@
-// frontend/dashboard/src/api/index.ts
-/**
- * Main API exports - centralized access to all services
- */
-
-import { ApiClient, apiClient } from './base/apiClient';
-import { AuthApi } from './services/authApi';
-import { TrainingApi } from './services/trainingApi';
-import { ForecastingApi } from './services/forecastingApi';
-import { SalesApi } from './services/salesApi';
-import { DataApi } from './services/dataApi';
-import { TenantApi } from './services/tenantApi';
-
-// Service instances using the default client
-export const authApi = new AuthApi(apiClient);
-export const trainingApi = new TrainingApi(apiClient);
-export const forecastingApi = new ForecastingApi(apiClient);
-export const salesApi = new SalesApi(apiClient);
-export const dataApi = new DataApi(apiClient);
-export const tenantApi = new TenantApi(apiClient);
-
-// Export everything for flexibility
-export * from './base/apiClient';
-export * from './services/authApi';
-export * from './services/trainingApi';
-export * from './services/forecastingApi';
-export * from './services/salesApi';
-export * from './services/dataApi';
-export * from './services/tenantApi';
-export * from '../types/api';
-
-// Convenience hooks for React
-export { useApi } from './hooks/useApi';
-export { useAuth } from './hooks/useAuth';
-export { useTraining } from './hooks/useTraining';

frontend/src/api/interceptors.ts

@@ -1,96 +0,0 @@
-// frontend/dashboard/src/api/interceptors.ts
-/**
- * Request/Response interceptors for additional functionality
- */
-
-import { AxiosRequestConfig, AxiosResponse } from 'axios';
-import { apiCache } from './cache';
-
-export function addLoggingInterceptor(client: any) {
-  // Request logging
-  client.interceptors.request.use(
-    (config: AxiosRequestConfig) => {
-      if (process.env.NODE_ENV === 'development') {
-        console.log(`🚀 API Request: ${config.method?.toUpperCase()} ${config.url}`, {
-          params: config.params,
-          data: config.data,
-        });
-      }
-      return config;
-    },
-    (error: any) => {
-      if (process.env.NODE_ENV === 'development') {
-        console.error('❌ API Request Error:', error);
-      }
-      return Promise.reject(error);
-    }
-  );
-
-  // Response logging
-  client.interceptors.response.use(
-    (response: AxiosResponse) => {
-      if (process.env.NODE_ENV === 'development') {
-        console.log(`✅ API Response: ${response.config.method?.toUpperCase()} ${response.config.url}`, {
-          status: response.status,
-          data: response.data,
-        });
-      }
-      return response;
-    },
-    (error: any) => {
-      if (process.env.NODE_ENV === 'development') {
-        console.error('❌ API Response Error:', {
-          url: error.config?.url,
-          status: error.response?.status,
-          data: error.response?.data,
-        });
-      }
-      return Promise.reject(error);
-    }
-  );
-}
-
-export function addCacheInterceptor(client: any) {
-  // Response caching for GET requests
-  client.interceptors.response.use(
-    (response: AxiosResponse) => {
-      const { method, url } = response.config;
-      
-      if (method === 'get' && url) {
-        const cacheKey = `${method}:${url}`;
-        apiCache.set(cacheKey, response.data, 300000); // 5 minutes
-      }
-      
-      return response;
-    },
-    (error: any) => Promise.reject(error)
-  );
-}
-
-export function addRetryInterceptor(client: any, maxRetries: number = 3) {
-  client.interceptors.response.use(
-    (response: AxiosResponse) => response,
-    async (error: any) => {
-      const { config } = error;
-      
-      if (!config || config.__retryCount >= maxRetries) {
-        return Promise.reject(error);
-      }
-      
-      config.__retryCount = config.__retryCount || 0;
-      config.__retryCount += 1;
-      
-      // Only retry on network errors or 5xx errors
-      if (
-        !error.response ||
-        (error.response.status >= 500 && error.response.status < 600)
-      ) {
-        const delay = Math.pow(2, config.__retryCount) * 1000; // Exponential backoff
-        await new Promise(resolve => setTimeout(resolve, delay));
-        return client(config);
-      }
-      
-      return Promise.reject(error);
-    }
-  );
-}

frontend/src/api/services/api.ts

@@ -0,0 +1,49 @@
+// src/api/services/api.ts
+import { apiClient } from '../base/apiClient';
+import {
+  ApiResponse,
+  LoginRequest,
+  RegisterRequest,
+  TokenResponse,
+  UserProfile,
+  TenantInfo,
+  SalesRecord,
+  TrainingRequest,
+  TrainedModel,
+  ForecastRecord,
+  ForecastRequest,
+  WeatherData,
+  TrafficData,
+  NotificationSettings,
+  // ... other types from your api.ts file
+} from '../types/api'; // This should point to your main types file (api.ts)
+
+// Assuming your api.ts defines these interfaces:
+// interface DashboardStats { ... }
+// interface ApiResponse<T> { ... }
+
+
+// Define DashboardStats interface here or ensure it's imported from your main types file
+export interface DashboardStats {
+  totalSales: number;
+  totalRevenue: number;
+  lastTrainingDate: string | null;
+  forecastAccuracy: number; // e.g., MAPE or RMSE
+}
+
+
+export const dataApi = {
+  uploadSalesHistory: (file: File, additionalData?: Record<string, any>) =>
+    apiClient.upload<ApiResponse<any>>('/data/upload-sales', file, additionalData),
+  getDashboardStats: () =>
+    apiClient.get<ApiResponse<DashboardStats>>('/dashboard/stats'),
+};
+
+export const forecastingApi = {
+  getForecast: (params: ForecastRequest) =>
+    apiClient.get<ApiResponse<ForecastRecord[]>>('/forecast', { params }),
+};
+
+
+// Re-export all types from the original api.ts file
+export * from '../types/api'

frontend/src/api/services/authApi.ts

@@ -1,98 +0,0 @@
-// frontend/dashboard/src/api/services/authApi.ts
-/**
- * Authentication API service
- */
-
-import { ApiClient } from '../base/apiClient';
-import {
-  LoginRequest,
-  RegisterRequest,
-  TokenResponse,
-  UserProfile,
-  ApiResponse,
-} from '../../types/api';
-
-export class AuthApi {
-  constructor(private client: ApiClient) {}
-
-  async login(credentials: LoginRequest): Promise<TokenResponse> {
-    const response = await this.client.post<TokenResponse>('/auth/login', credentials);
-    
-    // Store tokens
-    localStorage.setItem('access_token', response.access_token);
-    localStorage.setItem('refresh_token', response.refresh_token);
-    
-    return response;
-  }
-
-  async register(userData: RegisterRequest): Promise<UserProfile> {
-    return this.client.post<UserProfile>('/auth/register', userData);
-  }
-
-  async logout(): Promise<void> {
-    try {
-      await this.client.post('/auth/logout');
-    } finally {
-      // Always clear local storage
-      localStorage.removeItem('access_token');
-      localStorage.removeItem('refresh_token');
-      localStorage.removeItem('user_profile');
-    }
-  }
-
-  async refreshToken(): Promise<TokenResponse> {
-    const refreshToken = localStorage.getItem('refresh_token');
-    
-    if (!refreshToken) {
-      throw new Error('No refresh token available');
-    }
-
-    const response = await this.client.post<TokenResponse>('/auth/refresh', {
-      refresh_token: refreshToken,
-    });
-
-    // Update stored tokens
-    localStorage.setItem('access_token', response.access_token);
-    localStorage.setItem('refresh_token', response.refresh_token);
-    
-    return response;
-  }
-
-  async getCurrentUser(): Promise<UserProfile> {
-    const profile = await this.client.get<UserProfile>('/auth/me');
-    localStorage.setItem('user_profile', JSON.stringify(profile));
-    return profile;
-  }
-
-  async updateProfile(updates: Partial<UserProfile>): Promise<UserProfile> {
-    return this.client.patch<UserProfile>('/auth/profile', updates);
-  }
-
-  async changePassword(currentPassword: string, newPassword: string): Promise<void> {
-    return this.client.post('/auth/change-password', {
-      current_password: currentPassword,
-      new_password: newPassword,
-    });
-  }
-
-  async requestPasswordReset(email: string): Promise<void> {
-    return this.client.post('/auth/password-reset', { email });
-  }
-
-  async confirmPasswordReset(token: string, newPassword: string): Promise<void> {
-    return this.client.post('/auth/password-reset/confirm', {
-      token,
-      new_password: newPassword,
-    });
-  }
-
-  // Helper methods
-  isAuthenticated(): boolean {
-    return !!localStorage.getItem('access_token');
-  }
-
-  getStoredUser(): UserProfile | null {
-    const stored = localStorage.getItem('user_profile');
-    return stored ? JSON.parse(stored) : null;
-  }
-}

frontend/src/api/services/authService.ts

@@ -1,5 +1,5 @@
 // src/api/auth/authService.ts
-import { tokenManager } from './tokenManager';
+import { tokenManager } from '../auth/tokenManager';
 import { apiClient } from '../base/apiClient';
 
 export interface LoginCredentials {

frontend/src/api/services/dataApi.ts

@@ -1,53 +0,0 @@
-// frontend/dashboard/src/api/services/dataApi.ts
-/**
- * External data API service (weather, traffic, etc.)
- */
-
-import { ApiClient } from '../base/apiClient';
-import { WeatherData, TrafficData } from '../../types/api';
-
-export class DataApi {
-  constructor(private client: ApiClient) {}
-
-  async getWeatherData(
-    startDate: string,
-    endDate: string
-  ): Promise<WeatherData[]> {
-    return this.client.get<WeatherData[]>('/data/weather', {
-      params: { start_date: startDate, end_date: endDate },
-    });
-  }
-
-  async getTrafficData(
-    startDate: string,
-    endDate: string
-  ): Promise<TrafficData[]> {
-    return this.client.get<TrafficData[]>('/data/traffic', {
-      params: { start_date: startDate, end_date: endDate },
-    });
-  }
-
-  async getCurrentWeather(): Promise<WeatherData> {
-    return this.client.get<WeatherData>('/data/weather/current');
-  }
-
-  async getWeatherForecast(days: number = 7): Promise<WeatherData[]> {
-    return this.client.get<WeatherData[]>('/data/weather/forecast', {
-      params: { days },
-    });
-  }
-
-  async syncExternalData(): Promise<{ message: string; synced_records: number }> {
-    return this.client.post('/data/sync');
-  }
-
-  async getDataQuality(): Promise<{
-    weather_coverage: number;
-    traffic_coverage: number;
-    last_sync: string;
-    issues: string[];
-  }> {
-    return this.client.get('/data/quality');
-  }
-}
-

frontend/src/api/services/forecastingApi.ts

@@ -1,48 +0,0 @@
-// frontend/dashboard/src/api/services/forecastingApi.ts
-/**
- * Forecasting API service
- */
-
-import { ApiClient } from '../base/apiClient';
-import {
-  ForecastRecord,
-  ForecastRequest,
-  ApiResponse,
-} from '../../types/api';
-
-export class ForecastingApi {
-  constructor(private client: ApiClient) {}
-
-  async getForecasts(request: ForecastRequest = {}): Promise<ForecastRecord[]> {
-    return this.client.get<ForecastRecord[]>('/forecasting/forecasts', {
-      params: request,
-    });
-  }
-
-  async getForecastByProduct(
-    productName: string,
-    daysAhead: number = 7
-  ): Promise<ForecastRecord[]> {
-    return this.client.get<ForecastRecord[]>(`/forecasting/forecasts/${productName}`, {
-      params: { days_ahead: daysAhead },
-    });
-  }
-
-  async generateForecast(request: ForecastRequest): Promise<ForecastRecord[]> {
-    return this.client.post<ForecastRecord[]>('/forecasting/generate', request);
-  }
-
-  async updateForecast(forecastId: string, adjustments: Partial<ForecastRecord>): Promise<ForecastRecord> {
-    return this.client.patch<ForecastRecord>(`/forecasting/forecasts/${forecastId}`, adjustments);
-  }
-
-  async deleteForecast(forecastId: string): Promise<void> {
-    return this.client.delete(`/forecasting/forecasts/${forecastId}`);
-  }
-
-  async getProductPerformance(productName: string, days: number = 30): Promise<any> {
-    return this.client.get(`/forecasting/performance/${productName}`, {
-      params: { days },
-    });
-  }
-}

frontend/src/api/services/index.ts

@@ -1,17 +0,0 @@
-// src/api/services/index.ts
-import { apiClient } from '../base/apiClient';
-import { AuthService } from './authService';
-import { TrainingService } from './trainingService';
-import { ForecastingService } from './forecastingService';
-import { DataService } from './dataService';
-import { TenantService } from './tenantService';
-
-// Service instances with circuit breakers
-export const authService = new AuthService(apiClient);
-export const trainingService = new TrainingService(apiClient);
-export const forecastingService = new ForecastingService(apiClient);
-export const dataService = new DataService(apiClient);
-export const tenantService = new TenantService(apiClient);
-
-// Export types
-export * from '../types';

frontend/src/api/services/salesApi.ts

@@ -1,70 +0,0 @@
-// frontend/dashboard/src/api/services/salesApi.ts
-/**
- * Sales data API service
- */
-
-import { ApiClient } from '../base/apiClient';
-import {
-  SalesRecord,
-  CreateSalesRequest,
-  ApiResponse,
-} from '../../types/api';
-
-export interface SalesQuery {
-  start_date?: string;
-  end_date?: string;
-  product_name?: string;
-  limit?: number;
-  offset?: number;
-}
-
-export class SalesApi {
-  constructor(private client: ApiClient) {}
-
-  async getSales(query: SalesQuery = {}): Promise<SalesRecord[]> {
-    return this.client.get<SalesRecord[]>('/data/sales', {
-      params: query,
-    });
-  }
-
-  async createSalesRecord(salesData: CreateSalesRequest): Promise<SalesRecord> {
-    return this.client.post<SalesRecord>('/data/sales', salesData);
-  }
-
-  async updateSalesRecord(id: string, updates: Partial<CreateSalesRequest>): Promise<SalesRecord> {
-    return this.client.patch<SalesRecord>(`/data/sales/${id}`, updates);
-  }
-
-  async deleteSalesRecord(id: string): Promise<void> {
-    return this.client.delete(`/data/sales/${id}`);
-  }
-
-  async bulkCreateSales(salesData: CreateSalesRequest[]): Promise<SalesRecord[]> {
-    return this.client.post<SalesRecord[]>('/data/sales/bulk', salesData);
-  }
-
-  async uploadSalesFile(
-    file: File,
-    onProgress?: (progress: number) => void
-  ): Promise<{ imported: number; errors: any[] }> {
-    return this.client.uploadFile('/data/sales/upload', file, onProgress);
-  }
-
-  async getSalesAnalytics(
-    startDate: string,
-    endDate: string
-  ): Promise<{
-    totalRevenue: number;
-    totalQuantity: number;
-    topProducts: Array<{ product_name: string; quantity: number; revenue: number }>;
-    dailyTrends: Array<{ date: string; quantity: number; revenue: number }>;
-  }> {
-    return this.client.get('/data/sales/analytics', {
-      params: { start_date: startDate, end_date: endDate },
-    });
-  }
-
-  async getProductList(): Promise<string[]> {
-    return this.client.get<string[]>('/data/sales/products');
-  }
-}

frontend/src/api/services/tenantApi.ts

@@ -1,41 +0,0 @@
-// frontend/dashboard/src/api/services/tenantApi.ts
-/**
- * Tenant management API service
- */
-
-import { ApiClient } from '../base/apiClient';
-import { TenantInfo, NotificationSettings } from '../../types/api';
-
-export class TenantApi {
-  constructor(private client: ApiClient) {}
-
-  async getCurrentTenant(): Promise<TenantInfo> {
-    return this.client.get<TenantInfo>('/tenants/current');
-  }
-
-  async updateTenant(updates: Partial<TenantInfo>): Promise<TenantInfo> {
-    return this.client.patch<TenantInfo>('/tenants/current', updates);
-  }
-
-  async getNotificationSettings(): Promise<NotificationSettings> {
-    return this.client.get<NotificationSettings>('/tenants/notifications');
-  }
-
-  async updateNotificationSettings(settings: Partial<NotificationSettings>): Promise<NotificationSettings> {
-    return this.client.patch<NotificationSettings>('/tenants/notifications', settings);
-  }
-
-  async testNotification(type: 'email' | 'whatsapp'): Promise<{ sent: boolean; message: string }> {
-    return this.client.post(`/tenants/notifications/test/${type}`);
-  }
-
-  async getTenantStats(): Promise<{
-    total_sales_records: number;
-    total_forecasts: number;
-    active_models: number;
-    last_training: string;
-    data_quality_score: number;
-  }> {
-    return this.client.get('/tenants/stats');
-  }
-}

frontend/src/api/services/trainingApi.ts

@@ -1,62 +0,0 @@
-// frontend/dashboard/src/api/services/trainingApi.ts
-/**
- * Training API service
- */
-
-import { ApiClient } from '../base/apiClient';
-import {
-  TrainingJobStatus,
-  TrainingRequest,
-  TrainedModel,
-  ApiResponse,
-} from '../../types/api';
-
-export class TrainingApi {
-  constructor(private client: ApiClient) {}
-
-  async startTraining(request: TrainingRequest = {}): Promise<TrainingJobStatus> {
-    return this.client.post<TrainingJobStatus>('/training/train', request);
-  }
-
-  async getTrainingStatus(jobId: string): Promise<TrainingJobStatus> {
-    return this.client.get<TrainingJobStatus>(`/training/status/${jobId}`);
-  }
-
-  async getTrainingJobs(limit: number = 10, offset: number = 0): Promise<TrainingJobStatus[]> {
-    return this.client.get<TrainingJobStatus[]>('/training/jobs', {
-      params: { limit, offset },
-    });
-  }
-
-  async getTrainedModels(): Promise<TrainedModel[]> {
-    return this.client.get<TrainedModel[]>('/training/models');
-  }
-
-  async cancelTraining(jobId: string): Promise<void> {
-    return this.client.delete(`/training/jobs/${jobId}`);
-  }
-
-  // WebSocket for real-time training progress
-  subscribeToTrainingProgress(
-    jobId: string,
-    onProgress: (progress: TrainingJobStatus) => void,
-    onError?: (error: Error) => void
-  ): WebSocket {
-    const ws = this.client.createWebSocket(`/training/progress/${jobId}`);
-
-    ws.onmessage = (event) => {
-      try {
-        const data = JSON.parse(event.data);
-        onProgress(data);
-      } catch (error) {
-        onError?.(new Error('Failed to parse progress data'));
-      }
-    };
-
-    ws.onerror = (event) => {
-      onError?.(new Error('WebSocket connection error'));
-    };
-
-    return ws;
-  }
-}

frontend/src/components/auth/ProtectedRoute.tsx

@@ -0,0 +1,33 @@
+// src/components/auth/ProtectedRoute.tsx
+import React from 'react';
+import { Navigate, useLocation } from 'react-router-dom';
+import { useAuth } from '../../contexts/AuthContext';
+
+interface ProtectedRouteProps {
+  children: React.ReactNode;
+  requireAuth?: boolean;
+  redirectTo?: string;
+}
+
+export const ProtectedRoute: React.FC<ProtectedRouteProps> = ({
+  children,
+  requireAuth = true,
+  redirectTo = '/login'
+}) => {
+  const { isAuthenticated, isLoading } = useAuth();
+  const location = useLocation();
+
+  if (isLoading) {
+    return (
+      <div className="min-h-screen flex items-center justify-center">
+        <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-indigo-600"></div>
+      </div>
+    );
+  }
+
+  if (requireAuth && !isAuthenticated) {
+    return <Navigate to={redirectTo} state={{ from: location }} replace />;
+  }
+
+  return <>{children}</>;
+};

frontend/src/components/common/ErrorBoundary.tsx

@@ -0,0 +1,57 @@
+// src/components/common/ErrorBoundary.tsx
+import React, { Component, ErrorInfo, ReactNode } from 'react';
+
+interface Props {
+  children: ReactNode;
+  fallback?: ReactNode;
+}
+
+interface State {
+  hasError: boolean;
+  error: Error | null;
+}
+
+export class ErrorBoundary extends Component<Props, State> {
+  state: State = {
+    hasError: false,
+    error: null
+  };
+
+  static getDerivedStateFromError(error: Error): State {
+    return { hasError: true, error };
+  }
+
+  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
+    console.error('ErrorBoundary caught:', error, errorInfo);
+    
+    // Send error to monitoring service
+    if (process.env.NODE_ENV === 'production') {
+      // logErrorToService(error, errorInfo);
+    }
+  }
+
+  render() {
+    if (this.state.hasError) {
+      return this.props.fallback || (
+        <div className="min-h-screen flex items-center justify-center">
+          <div className="text-center">
+            <h1 className="text-2xl font-bold text-gray-900 mb-4">
+              Algo salió mal
+            </h1>
+            <p className="text-gray-600 mb-6">
+              Ha ocurrido un error inesperado. Por favor, recarga la página.
+            </p>
+            <button
+              onClick={() => window.location.reload()}
+              className="px-4 py-2 bg-indigo-600 text-white rounded-md hover:bg-indigo-700"
+            >
+              Recargar página
+            </button>
+          </div>
+        </div>
+      );
+    }
+
+    return this.props.children;
+  }
+}

frontend/src/components/common/NotificationToast.tsx

@@ -0,0 +1,64 @@
+// src/components/common/NotificationToast.tsx
+import React, { useEffect } from 'react';
+import { XMarkIcon } from '@heroicons/react/24/outline';
+import {
+  CheckCircleIcon,
+  ExclamationCircleIcon,
+  ExclamationTriangleIcon,
+  InformationCircleIcon
+} from '@heroicons/react/24/solid';
+
+interface NotificationToastProps {
+  id: string;
+  type: 'success' | 'error' | 'warning' | 'info';
+  title: string;
+  message: string;
+  onClose: () => void;
+}
+
+export const NotificationToast: React.FC<NotificationToastProps> = ({
+  type,
+  title,
+  message,
+  onClose
+}) => {
+  const icons = {
+    success: CheckCircleIcon,
+    error: ExclamationCircleIcon,
+    warning: ExclamationTriangleIcon,
+    info: InformationCircleIcon
+  };
+
+  const colors = {
+    success: 'text-green-400',
+    error: 'text-red-400',
+    warning: 'text-yellow-400',
+    info: 'text-blue-400'
+  };
+
+  const Icon = icons[type];
+
+  return (
+    <div className="max-w-sm w-full bg-white shadow-lg rounded-lg pointer-events-auto ring-1 ring-black ring-opacity-5 overflow-hidden">
+      <div className="p-4">
+        <div className="flex items-start">
+          <div className="flex-shrink-0">
+            <Icon className={`h-6 w-6 ${colors[type]}`} />
+          </div>
+          <div className="ml-3 w-0 flex-1 pt-0.5">
+            <p className="text-sm font-medium text-gray-900">{title}</p>
+            <p className="mt-1 text-sm text-gray-500">{message}</p>
+          </div>
+          <div className="ml-4 flex-shrink-0 flex">
+            <button
+              className="bg-white rounded-md inline-flex text-gray-400 hover:text-gray-500 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500"
+              onClick={onClose}
+            >
+              <XMarkIcon className="h-5 w-5" />
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+};

frontend/src/components/common/PrivateRoute.tsx

@@ -1,31 +0,0 @@
-"use client";
-
-import React from 'react';
-import { useRouter } from 'next/router';
-import { useAuth } from '../../contexts/AuthContext';
-
-interface PrivateRouteProps {
-  children: React.ReactNode;
-}
-
-const PrivateRoute: React.FC<PrivateRouteProps> = ({ children }) => {
-  const { user, loading } = useAuth();
-  const router = useRouter();
-
-  if (loading) {
-    return (
-      <div className="min-h-screen flex items-center justify-center">
-        <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-orange-600"></div>
-      </div>
-    );
-  }
-
-  if (!user) {
-    router.push('/login');
-    return null;
-  }
-
-  return <>{children}</>;
-};
-
-export default PrivateRoute;

frontend/src/components/data/SalesUploader.tsx

@@ -0,0 +1,47 @@
+// src/components/data/SalesUploader.tsx
+import React, { useRef, useState } from 'react';
+import { CloudArrowUpIcon } from '@heroicons/react/24/outline';
+
+interface SalesUploaderProps {
+  onUpload: (file: File) => Promise<void>;
+}
+
+export const SalesUploader: React.FC<SalesUploaderProps> = ({ onUpload }) => {
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  const [isUploading, setIsUploading] = useState(false);
+
+  const handleFileSelect = async (event: React.ChangeEvent<HTMLInputElement>) => {
+    const file = event.target.files?.[0];
+    if (!file) return;
+
+    setIsUploading(true);
+    try {
+      await onUpload(file);
+    } finally {
+      setIsUploading(false);
+      if (fileInputRef.current) {
+        fileInputRef.current.value = '';
+      }
+    }
+  };
+
+  return (
+    <>
+      <input
+        ref={fileInputRef}
+        type="file"
+        accept=".csv,.xlsx,.xls"
+        onChange={handleFileSelect}
+        className="hidden"
+      />
+      <button
+        onClick={() => fileInputRef.current?.click()}
+        disabled={isUploading}
+        className="inline-flex items-center px-4 py-2 border border-gray-300 shadow-sm text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 disabled:opacity-50 disabled:cursor-not-allowed"
+      >
+        <CloudArrowUpIcon className="h-5 w-5 mr-2" />
+        {isUploading ? 'Uploading...' : 'Upload Sales Data'}
+      </button>
+    </>
+  );
+};

frontend/src/components/training/TrainingProgressCard.tsx

@@ -0,0 +1,113 @@
+// src/components/training/TrainingProgressCard.tsx
+import React from 'react';
+import { useTrainingProgress } from '../../api/hooks/useTrainingProgress';
+import { CheckCircleIcon, XCircleIcon } from '@heroicons/react/24/outline';
+
+interface TrainingProgressCardProps {
+  jobId: string;
+  onComplete?: () => void;
+}
+
+export const TrainingProgressCard: React.FC<TrainingProgressCardProps> = ({
+  jobId,
+  onComplete
+}) => {
+  const { progress, error, isComplete, isConnected } = useTrainingProgress(jobId);
+
+  React.useEffect(() => {
+    if (isComplete && onComplete) {
+      onComplete();
+    }
+  }, [isComplete, onComplete]);
+
+  if (!progress) {
+    return (
+      <div className="bg-white rounded-lg shadow p-6">
+        <div className="animate-pulse">
+          <div className="h-4 bg-gray-200 rounded w-3/4 mb-4"></div>
+          <div className="h-2 bg-gray-200 rounded"></div>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="bg-white rounded-lg shadow p-6">
+      <div className="flex items-center justify-between mb-4">
+        <h3 className="text-lg font-semibold">Training Progress</h3>
+        <div className="flex items-center space-x-2">
+          {isConnected && (
+            <span className="flex items-center text-sm text-green-600">
+              <span className="w-2 h-2 bg-green-600 rounded-full mr-1 animate-pulse"></span>
+              Live
+            </span>
+          )}
+          {progress.status === 'completed' && (
+            <CheckCircleIcon className="w-5 h-5 text-green-600" />
+          )}
+          {progress.status === 'failed' && (
+            <XCircleIcon className="w-5 h-5 text-red-600" />
+          )}
+        </div>
+      </div>
+
+      {error && (
+        <div className="mb-4 p-3 bg-red-50 text-red-700 rounded-md text-sm">
+          {error}
+        </div>
+      )}
+
+      <div className="space-y-3">
+        <div>
+          <div className="flex justify-between text-sm text-gray-600 mb-1">
+            <span>{progress.current_step}</span>
+            <span>{Math.round(progress.progress)}%</span>
+          </div>
+          <div className="w-full bg-gray-200 rounded-full h-2">
+            <div
+              className="bg-indigo-600 h-2 rounded-full transition-all duration-300 ease-out"
+              style={{ width: `${progress.progress}%` }}
+            />
+          </div>
+        </div>
+
+        {progress.estimated_time_remaining && (
+          <p className="text-sm text-gray-600">
+            Tiempo estimado: {formatTime(progress.estimated_time_remaining)}
+          </p>
+        )}
+
+        {progress.metrics && (
+          <div className="mt-4 grid grid-cols-2 gap-4">
+            {Object.entries(progress.metrics).map(([key, value]) => (
+              <div key={key} className="text-sm">
+                <span className="text-gray-600">{formatMetricName(key)}:</span>
+                <span className="ml-2 font-medium">{formatMetricValue(value)}</span>
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+};
+
+// Utility functions
+const formatTime = (seconds: number): string => {
+  if (seconds < 60) return `${seconds}s`;
+  const minutes = Math.floor(seconds / 60);
+  if (minutes < 60) return `${minutes}m`;
+  const hours = Math.floor(minutes / 60);
+  return `${hours}h ${minutes % 60}m`;
+};
+
+const formatMetricName = (name: string): string => {
+  return name.replace(/_/g, ' ').replace(/\b\w/g, l => l.toUpperCase());
+};
+
+const formatMetricValue = (value: any): string => {
+  if (typeof value === 'number') {
+    return value.toFixed(2);
+  }
+  return String(value);
+};

frontend/src/contexts/AuthContext.tsx

@@ -1,6 +1,6 @@
 // src/contexts/AuthContext.tsx
 import React, { createContext, useContext, useEffect, useState, useCallback } from 'react';
-import { authService, UserProfile } from '../api/auth/authService';
+import { authService, UserProfile } from '../api/services/authService';
 import { tokenManager } from '../api/auth/tokenManager';
 
 interface AuthContextType {

frontend/src/pages/dashboard/index.tsx

@@ -1,28 +1,39 @@
-// src/pages/Dashboard/Dashboard.tsx
+// src/pages/dashboard/index.tsx
 import React, { useState, useEffect, useCallback } from 'react';
-import { useAuth } from '../../api/hooks/useAuth';
+import Head from 'next/head';
-import { useTrainingProgress } from '../../api/hooks/useTrainingProgress';
-import { trainingApi, forecastingApi, dataApi } from '../../api';
-import { TrainingProgressCard } from '../../components/training/TrainingProgressCard';
-import { ForecastChart } from '../../components/charts/ForecastChart';
-import { SalesUploader } from '../../components/data/SalesUploader';
-import { NotificationToast } from '../../components/common/NotificationToast';
-import { ErrorBoundary } from '../../components/common/ErrorBoundary';
-import { StatsCard } from '../../components/common/StatsCard';
-import { useWebSocket } from '../../api/hooks/useWebSocket';
 import {
   ChartBarIcon,
   CloudArrowUpIcon,
   CpuChipIcon,
   BellIcon,
-  ArrowPathIcon
+  ArrowPathIcon,
+  ScaleIcon, // For accuracy
+  CalendarDaysIcon, // For last training date
 } from '@heroicons/react/24/outline';
+import { useAuth } from '../../contexts/AuthContext';
+import { useTrainingProgress } from '../../api/hooks/useTrainingProgress'; // Path corrected
+import { TrainingProgressCard } from '../../components/training/TrainingProgressCard';
+import { ForecastChart } from '../../components/charts/ForecastChart';
+import { SalesUploader } from '../../components/data/SalesUploader';
+import { NotificationToast } from '../../components/common/NotificationToast';
+import { ErrorBoundary } from '../../components/common/ErrorBoundary';
+import {
+  dataApi,
+  forecastingApi,
+  trainingApi, // Assuming a trainingApi service exists, potentially part of dataApi
+  ApiResponse,
+  ForecastRecord,
+  SalesRecord,
+  TrainingTask,
+  TrainingRequest,
+} from '../../api/services/api'; // Consolidated API services and types
 
+// Dashboard specific types
 interface DashboardStats {
   totalSales: number;
   totalRevenue: number;
   lastTrainingDate: string | null;
-  forecastAccuracy: number;
+  forecastAccuracy: number; // e.g., MAPE or RMSE
 }
 
 interface Notification {
@@ -33,303 +44,29 @@ interface Notification {
   timestamp: Date;
 }
 
-export const Dashboard: React.FC = () => {
+// StatsCard Component (moved here for completeness, or keep in common if reused)
-  const { user } = useAuth();
-  const [activeJobId, setActiveJobId] = useState<string | null>(null);
-  const [stats, setStats] = useState<DashboardStats | null>(null);
-  const [forecasts, setForecasts] = useState<any[]>([]);
-  const [notifications, setNotifications] = useState<Notification[]>([]);
-  const [isTraining, setIsTraining] = useState(false);
-  const [isLoading, setIsLoading] = useState(true);
-
-  // WebSocket for real-time notifications
-  const { send: sendNotification } = useWebSocket({
-    endpoint: '/notifications',
-    onMessage: (data) => {
-      if (data.type === 'notification') {
-        addNotification({
-          id: Date.now().toString(),
-          type: data.level || 'info',
-          title: data.title,
-          message: data.message,
-          timestamp: new Date()
-        });
-      }
-    }
-  });
-
-  // Training progress hook
-  const { progress, error: trainingError, isComplete } = useTrainingProgress(activeJobId);
-
-  // Load initial data
-  useEffect(() => {
-    loadDashboardData();
-  }, []);
-
-  // Handle training completion
-  useEffect(() => {
-    if (isComplete && activeJobId) {
-      handleTrainingComplete();
-    }
-  }, [isComplete, activeJobId]);
-
-  const loadDashboardData = async () => {
-    setIsLoading(true);
-    try {
-      // Load stats
-      const [salesData, tenantStats, latestForecasts] = await Promise.all([
-        dataService.getSalesAnalytics(),
-        dataService.getTenantStats(),
-        forecastingService.getLatestForecasts()
-      ]);
-
-      setStats({
-        totalSales: salesData.total_quantity,
-        totalRevenue: salesData.total_revenue,
-        lastTrainingDate: tenantStats.last_training_date,
-        forecastAccuracy: tenantStats.forecast_accuracy || 0
-      });
-
-      setForecasts(latestForecasts);
-    } catch (error) {
-      console.error('Failed to load dashboard data:', error);
-      addNotification({
-        id: Date.now().toString(),
-        type: 'error',
-        title: 'Error loading data',
-        message: 'Failed to load dashboard data. Please refresh the page.',
-        timestamp: new Date()
-      });
-    } finally {
-      setIsLoading(false);
-    }
-  };
-
-  const startTraining = async () => {
-    try {
-      setIsTraining(true);
-      const job = await trainingService.startTraining({
-        config: {
-          include_weather: true,
-          include_traffic: true,
-          forecast_days: 7
-        }
-      });
-
-      setActiveJobId(job.job_id);
-      addNotification({
-        id: Date.now().toString(),
-        type: 'info',
-        title: 'Training Started',
-        message: 'Model training has begun. This may take a few minutes.',
-        timestamp: new Date()
-      });
-    } catch (error) {
-      console.error('Failed to start training:', error);
-      addNotification({
-        id: Date.now().toString(),
-        type: 'error',
-        title: 'Training Failed',
-        message: 'Failed to start training. Please try again.',
-        timestamp: new Date()
-      });
-      setIsTraining(false);
-    }
-  };
-
-  const handleTrainingComplete = async () => {
-    setIsTraining(false);
-    setActiveJobId(null);
-    
-    addNotification({
-      id: Date.now().toString(),
-      type: 'success',
-      title: 'Training Complete',
-      message: 'Model training completed successfully!',
-      timestamp: new Date()
-    });
-
-    // Reload data to show new results
-    await loadDashboardData();
-  };
-
-  const handleSalesUpload = async (file: File) => {
-    try {
-      await dataService.uploadSalesData(file);
-      
-      addNotification({
-        id: Date.now().toString(),
-        type: 'success',
-        title: 'Upload Successful',
-        message: 'Sales data uploaded successfully.',
-        timestamp: new Date()
-      });
-
-      // Reload data
-      await loadDashboardData();
-    } catch (error) {
-      console.error('Failed to upload sales data:', error);
-      addNotification({
-        id: Date.now().toString(),
-        type: 'error',
-        title: 'Upload Failed',
-        message: 'Failed to upload sales data. Please check the file format.',
-        timestamp: new Date()
-      });
-    }
-  };
-
-  const addNotification = (notification: Notification) => {
-    setNotifications(prev => [notification, ...prev].slice(0, 10));
-    
-    // Auto-remove after 5 seconds
-    setTimeout(() => {
-      removeNotification(notification.id);
-    }, 5000);
-  };
-
-  const removeNotification = (id: string) => {
-    setNotifications(prev => prev.filter(n => n.id !== id));
-  };
-
-  if (isLoading) {
-    return (
-      <div className="min-h-screen flex items-center justify-center">
-        <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-indigo-600"></div>
-      </div>
-    );
-  }
-
-  return (
-    <ErrorBoundary>
-      <div className="min-h-screen bg-gray-50">
-        {/* Header */}
-        <header className="bg-white shadow">
-          <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-4">
-            <div className="flex items-center justify-between">
-              <h1 className="text-2xl font-bold text-gray-900">
-                Bakery Forecast Dashboard
-              </h1>
-              <div className="flex items-center space-x-4">
-                <button
-                  onClick={loadDashboardData}
-                  className="p-2 text-gray-400 hover:text-gray-500"
-                  title="Refresh data"
-                >
-                  <ArrowPathIcon className="h-5 w-5" />
-                </button>
-                <div className="relative">
-                  <BellIcon className="h-6 w-6 text-gray-400" />
-                  {notifications.length > 0 && (
-                    <span className="absolute -top-1 -right-1 h-3 w-3 bg-red-500 rounded-full"></span>
-                  )}
-                </div>
-                <div className="flex items-center">
-                  <span className="text-sm text-gray-700">{user?.full_name}</span>
-                </div>
-              </div>
-            </div>
-          </div>
-        </header>
-
-        {/* Main Content */}
-        <main className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
-          {/* Stats Grid */}
-          <div className="grid grid-cols-1 md:grid-cols-4 gap-6 mb-8">
-            <StatsCard
-              title="Total Sales"
-              value={stats?.totalSales || 0}
-              icon={ChartBarIcon}
-              format="number"
-            />
-            <StatsCard
-              title="Total Revenue"
-              value={stats?.totalRevenue || 0}
-              icon={ChartBarIcon}
-              format="currency"
-            />
-            <StatsCard
-              title="Last Training"
-              value={stats?.lastTrainingDate || 'Never'}
-              icon={CpuChipIcon}
-              format="date"
-            />
-            <StatsCard
-              title="Forecast Accuracy"
-              value={stats?.forecastAccuracy || 0}
-              icon={ChartBarIcon}
-              format="percentage"
-            />
-          </div>
-
-          {/* Actions Row */}
-          <div className="flex flex-wrap gap-4 mb-8">
-            <SalesUploader onUpload={handleSalesUpload} />
-            <button
-              onClick={startTraining}
-              disabled={isTraining}
-              className="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md shadow-sm text-white bg-indigo-600 hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 disabled:opacity-50 disabled:cursor-not-allowed"
-            >
-              <CpuChipIcon className="h-5 w-5 mr-2" />
-              {isTraining ? 'Training...' : 'Start Training'}
-            </button>
-          </div>
-
-          {/* Training Progress */}
-          {activeJobId && (
-            <div className="mb-8">
-              <TrainingProgressCard
-                jobId={activeJobId}
-                onComplete={handleTrainingComplete}
-              />
-            </div>
-          )}
-
-          {/* Forecast Charts */}
-          <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
-            {forecasts.map((forecast, index) => (
-              <ForecastChart
-                key={index}
-                title={forecast.product_name}
-                data={forecast.data}
-                className="bg-white rounded-lg shadow p-6"
-              />
-            ))}
-          </div>
-        </main>
-
-        {/* Notifications */}
-        <div className="fixed bottom-4 right-4 space-y-2">
-          {notifications.map(notification => (
-            <NotificationToast
-              key={notification.id}
-              {...notification}
-              onClose={() => removeNotification(notification.id)}
-            />
-          ))}
-        </div>
-      </div>
-    </ErrorBoundary>
-  );
-};
-
-// StatsCard Component
 interface StatsCardProps {
   title: string;
   value: any;
   icon: React.ElementType;
-  format: 'number' | 'currency' | 'percentage' | 'date';
+  format: 'number' | 'currency' | 'percentage' | 'date' | 'string'; // Added 'string' for flexibility
+  loading?: boolean;
 }
 
-const StatsCard: React.FC<StatsCardProps> = ({ title, value, icon: Icon, format }) => {
+const StatsCard: React.FC<StatsCardProps> = ({ title, value, icon: Icon, format, loading }) => {
   const formatValue = () => {
+    if (loading) return (
+      <div className="h-6 bg-gray-200 rounded w-3/4 animate-pulse"></div>
+    );
+    if (value === null || value === undefined) return 'N/A';
+
     switch (format) {
       case 'number':
-        return value.toLocaleString();
+        return value.toLocaleString('es-ES');
       case 'currency':
         return new Intl.NumberFormat('es-ES', {
           style: 'currency',
-          currency: 'EUR'
+          currency: 'EUR',
         }).format(value);
       case 'percentage':
         return `${(value * 100).toFixed(1)}%`;
@@ -341,16 +78,305 @@ const StatsCard: React.FC<StatsCardProps> = ({ title, value, icon: Icon, format
   };
 
   return (
-    <div className="bg-white rounded-lg shadow p-6">
+    <div className="bg-white rounded-lg shadow p-6 flex items-center">
-      <div className="flex items-center">
+      <div className="flex-shrink-0">
-        <div className="flex-shrink-0">
+        <Icon className="h-8 w-8 text-pania-blue" /> {/* Changed icon color */}
-          <Icon className="h-6 w-6 text-gray-400" />
+      </div>
-        </div>
+      <div className="ml-5">
-        <div className="ml-4">
+        <dt className="text-sm font-medium text-gray-500">{title}</dt>
-          <dt className="text-sm font-medium text-gray-500">{title}</dt>
+        <dd className="mt-1 text-3xl font-semibold text-gray-900">{formatValue()}</dd>
-          <dd className="text-2xl font-semibold text-gray-900">{formatValue()}</dd>
-        </div>
       </div>
     </div>
   );
-};
+};
+
+
+const DashboardPage: React.FC = () => {
+  const { user, isAuthenticated, isLoading: authLoading } = useAuth();
+  const [activeJobId, setActiveJobId] = useState<string | null>(null);
+  const [stats, setStats] = useState<DashboardStats | null>(null);
+  const [forecasts, setForecasts] = useState<ForecastRecord[]>([]);
+  const [notifications, setNotifications] = useState<Notification[]>([]);
+  const [chartProductName, setChartProductName] = useState<string>(''); // Currently selected product for chart
+  const [loadingData, setLoadingData] = useState(true);
+
+  // Hook for training progress (if an active job ID is present)
+  const {
+    progress: trainingProgress,
+    error: trainingError,
+    isComplete: isTrainingComplete,
+    isConnected: isTrainingWebSocketConnected,
+  } = useTrainingProgress(activeJobId);
+
+  // Effect to handle training completion
+  useEffect(() => {
+    if (isTrainingComplete && activeJobId) {
+      addNotification('success', 'Entrenamiento Completado', `El modelo para el trabajo ${activeJobId} ha terminado de entrenar.`);
+      setActiveJobId(null); // Clear active job
+      fetchDashboardData(); // Refresh dashboard data after training
+    }
+    if (trainingError && activeJobId) {
+      addNotification('error', 'Error de Entrenamiento', `El entrenamiento para el trabajo ${activeJobId} falló: ${trainingError}`);
+      setActiveJobId(null);
+    }
+  }, [isTrainingComplete, trainingError, activeJobId]); // Dependencies
+
+
+  // Notification handling
+  const addNotification = useCallback((type: Notification['type'], title: string, message: string) => {
+    const newNotification: Notification = {
+      id: Date.now().toString(),
+      type,
+      title,
+      message,
+      timestamp: new Date(),
+    };
+    setNotifications((prev) => [...prev, newNotification]);
+  }, []);
+
+  const removeNotification = useCallback((id: string) => {
+    setNotifications((prev) => prev.filter((n) => n.id !== id));
+  }, []);
+
+  // Fetch initial dashboard data
+  const fetchDashboardData = useCallback(async () => {
+    setLoadingData(true);
+    try {
+      // Fetch Dashboard Stats
+      const statsResponse: ApiResponse<DashboardStats> = await dataApi.getDashboardStats();
+      if (statsResponse.data) {
+        setStats(statsResponse.data);
+      } else if (statsResponse.message) {
+        addNotification('warning', 'Dashboard Stats', statsResponse.message);
+      }
+
+      // Fetch initial forecasts (e.g., for a default product or the first available product)
+      const forecastResponse: ApiResponse<ForecastRecord[]> = await forecastingApi.getForecast({
+        forecast_days: 7, // Example: 7 days forecast
+        product_name: user?.tenant_id ? 'pan' : undefined, // Default to 'pan' or first product
+      });
+      if (forecastResponse.data && forecastResponse.data.length > 0) {
+        setForecasts(forecastResponse.data);
+        setChartProductName(forecastResponse.data[0].product_name); // Set the product name for the chart
+      } else if (forecastResponse.message) {
+        addNotification('info', 'Previsiones', forecastResponse.message);
+      }
+
+    } catch (error: any) {
+      console.error('Failed to fetch dashboard data:', error);
+      addNotification('error', 'Error de Carga', error.message || 'No se pudieron cargar los datos del dashboard.');
+    } finally {
+      setLoadingData(false);
+    }
+  }, [user, addNotification]);
+
+  useEffect(() => {
+    if (isAuthenticated) {
+      fetchDashboardData();
+    }
+  }, [isAuthenticated, fetchDashboardData]);
+
+  const handleSalesUpload = async (file: File) => {
+    try {
+      addNotification('info', 'Subiendo archivo', 'Cargando historial de ventas...');
+      const response = await dataApi.uploadSalesHistory(file);
+      addNotification('success', 'Subida Completa', 'Historial de ventas cargado exitosamente.');
+
+      // After upload, trigger a new training (assuming this is the flow)
+      const trainingRequest: TrainingRequest = {
+        force_retrain: true,
+        // You might want to specify products if the uploader supports it,
+        // or let the backend determine based on the uploaded data.
+      };
+      const trainingTask: TrainingTask = await trainingApi.startTraining(trainingRequest);
+      setActiveJobId(trainingTask.job_id);
+      addNotification('info', 'Entrenamiento iniciado', `Un nuevo entrenamiento ha comenzado (ID: ${trainingTask.job_id}).`);
+      // No need to fetch dashboard data here, as useEffect for isTrainingComplete will handle it
+    } catch (error: any) {
+      console.error('Error uploading sales or starting training:', error);
+      addNotification('error', 'Error al subir', error.message || 'No se pudo subir el archivo o iniciar el entrenamiento.');
+    }
+  };
+
+  const handleForecastProductChange = async (productName: string) => {
+    setLoadingData(true);
+    try {
+      const forecastResponse: ApiResponse<ForecastRecord[]> = await forecastingApi.getForecast({
+        forecast_days: 7,
+        product_name: productName,
+      });
+      if (forecastResponse.data) {
+        setForecasts(forecastResponse.data);
+        setChartProductName(productName);
+      }
+    } catch (error: any) {
+      addNotification('error', 'Error de Previsión', error.message || `No se pudieron cargar las previsiones para ${productName}.`);
+    } finally {
+      setLoadingData(false);
+    }
+  };
+
+
+  if (authLoading) {
+    return (
+      <div className="min-h-screen flex items-center justify-center bg-pania-white">
+        <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-pania-blue"></div>
+      </div>
+    );
+  }
+
+  if (!isAuthenticated) {
+    // If not authenticated, ProtectedRoute should handle redirect, but a fallback is good
+    return null;
+  }
+
+  return (
+    <ErrorBoundary>
+      <div className="min-h-screen bg-gray-100">
+        <Head>
+          <title>Dashboard - PanIA</title>
+          <meta name="description" content="Dashboard de predicción de demanda para Panaderías" />
+        </Head>
+
+        {/* Top Notification Area */}
+        <div className="fixed top-4 right-4 z-50 space-y-2">
+          {notifications.map(notification => (
+            <NotificationToast
+              key={notification.id}
+              {...notification}
+              onClose={() => removeNotification(notification.id)}
+            />
+          ))}
+        </div>
+
+        {/* Header/Navbar (You might want a dedicated Layout component for this) */}
+        <header className="bg-white shadow-sm py-4">
+          <nav className="container mx-auto flex justify-between items-center px-4">
+            <div className="text-3xl font-extrabold text-pania-charcoal">PanIA Dashboard</div>
+            <div className="flex items-center space-x-4">
+              <span className="text-gray-700">Bienvenido, {user?.full_name || user?.email}!</span>
+              <button
+                onClick={() => {
+                  useAuth().logout(); // Call logout from AuthContext
+                }}
+                className="text-pania-blue hover:text-pania-blue-dark font-medium px-4 py-2 rounded-md border border-pania-blue"
+              >
+                Cerrar Sesión
+              </button>
+            </div>
+          </nav>
+        </header>
+
+        <main className="container mx-auto px-4 py-8">
+          {/* Dashboard Overview Section */}
+          <section className="mb-8">
+            <h2 className="text-2xl font-bold text-gray-900 mb-6">Resumen del Negocio</h2>
+            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6">
+              <StatsCard
+                title="Ventas Totales"
+                value={stats?.totalSales}
+                icon={ChartBarIcon}
+                format="number"
+                loading={loadingData}
+              />
+              <StatsCard
+                title="Ingresos Totales"
+                value={stats?.totalRevenue}
+                icon={CurrencyEuroIcon} {/* Assuming CurrencyEuroIcon from heroicons */}
+                format="currency"
+                loading={loadingData}
+              />
+              <StatsCard
+                title="Último Entrenamiento"
+                value={stats?.lastTrainingDate || 'Nunca'}
+                icon={CalendarDaysIcon}
+                format="date"
+                loading={loadingData}
+              />
+              <StatsCard
+                title="Precisión (MAPE)"
+                value={stats?.forecastAccuracy}
+                icon={ScaleIcon}
+                format="percentage"
+                loading={loadingData}
+              />
+            </div>
+          </section>
+
+          {/* Training Section */}
+          <section className="mb-8">
+            <h2 className="text-2xl font-bold text-gray-900 mb-6">Entrenamiento del Modelo</h2>
+            <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+              <div className="bg-white rounded-lg shadow p-6">
+                <h3 className="text-lg font-semibold text-gray-800 mb-4">Subir Nuevos Datos de Ventas</h3>
+                <p className="text-gray-600 mb-4">
+                  Carga tu último historial de ventas para mantener tus predicciones actualizadas.
+                </p>
+                <SalesUploader onUpload={handleSalesUpload} />
+              </div>
+
+              <div className="bg-white rounded-lg shadow p-6">
+                <h3 className="text-lg font-semibold text-gray-800 mb-4">Estado del Entrenamiento</h3>
+                {activeJobId ? (
+                  <TrainingProgressCard jobId={activeJobId} />
+                ) : (
+                  <div className="flex flex-col items-center justify-center p-8 text-gray-500">
+                    <CpuChipIcon className="h-16 w-16 mb-4" />
+                    <p className="text-lg text-center">No hay un entrenamiento activo en este momento.</p>
+                    <p className="text-sm text-center mt-2">Sube un nuevo archivo de ventas para iniciar un entrenamiento.</p>
+                  </div>
+                )}
+              </div>
+            </div>
+          </section>
+
+          {/* Forecast Chart Section */}
+          <section>
+            <h2 className="text-2xl font-bold text-gray-900 mb-6">Previsiones de Demanda</h2>
+            <div className="bg-white rounded-lg shadow p-6">
+              <div className="mb-4 flex items-center justify-between">
+                <h3 className="text-lg font-semibold text-gray-800">Previsión para {chartProductName || 'Productos'}</h3>
+                {/* Product Selector for Forecast Chart (assuming ProductSelector can be used for single selection) */}
+                <select
+                  value={chartProductName}
+                  onChange={(e) => handleForecastProductChange(e.target.value)}
+                  className="mt-1 block w-48 pl-3 pr-10 py-2 text-base border-gray-300 focus:outline-none focus:ring-pania-blue focus:border-pania-blue sm:text-sm rounded-md"
+                >
+                  {/* You'll need to fetch the list of products associated with the user/tenant */}
+                  {/* For now, using defaultProducts as an example */}
+                  {defaultProducts.map((product) => (
+                    <option key={product.id} value={product.displayName}>
+                      {product.displayName}
+                    </option>
+                  ))}
+                </select>
+              </div>
+              {loadingData ? (
+                <div className="flex justify-center items-center h-64">
+                  <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-pania-blue"></div>
+                </div>
+              ) : forecasts.length > 0 ? (
+                <ForecastChart data={forecasts} productName={chartProductName} />
+              ) : (
+                <div className="text-center py-10 text-gray-500">
+                  <ChartBarIcon className="mx-auto h-16 w-16 text-gray-400" />
+                  <p className="mt-4 text-lg">No hay datos de previsión disponibles.</p>
+                  <p className="text-sm">Sube tu historial de ventas o selecciona otro producto.</p>
+                </div>
+              )}
+            </div>
+          </section>
+        </main>
+
+        {/* Footer */}
+        <footer className="bg-gray-800 text-gray-300 py-6 text-center mt-8">
+          <div className="container mx-auto px-4">
+            <p>&copy; {new Date().getFullYear()} PanIA. Todos los derechos reservados.</p>
+          </div>
+        </footer>
+      </div>
+    </ErrorBoundary>
+  );
+};
+
+export default DashboardPage;

frontend/src/utils/apiHelpers.ts

@@ -1,80 +0,0 @@
-// frontend/dashboard/src/utils/apiHelpers.ts
-/**
- * Utility functions for API operations
- */
-
-export function formatApiError(error: any): string {
-  if (error?.detail) {
-    return error.detail;
-  }
-  
-  if (error?.message) {
-    return error.message;
-  }
-  
-  return 'An unexpected error occurred';
-}
-
-export function isApiError(error: any): boolean {
-  return error && (error.detail || error.error_code);
-}
-
-export function formatDate(date: Date | string): string {
-  const d = typeof date === 'string' ? new Date(date) : date;
-  return d.toISOString().split('T')[0];
-}
-
-export function formatDateTime(date: Date | string): string {
-  const d = typeof date === 'string' ? new Date(date) : date;
-  return d.toISOString();
-}
-
-export function buildQueryParams(params: Record<string, any>): URLSearchParams {
-  const searchParams = new URLSearchParams();
-  
-  Object.entries(params).forEach(([key, value]) => {
-    if (value !== null && value !== undefined && value !== '') {
-      if (Array.isArray(value)) {
-        value.forEach(item => searchParams.append(key, String(item)));
-      } else {
-        searchParams.append(key, String(value));
-      }
-    }
-  });
-  
-  return searchParams;
-}
-
-export function debounce<T extends (...args: any[]) => any>(
-  func: T,
-  wait: number
-): (...args: Parameters<T>) => void {
-  let timeout: NodeJS.Timeout | null = null;
-  
-  return (...args: Parameters<T>) => {
-    if (timeout) {
-      clearTimeout(timeout);
-    }
-    
-    timeout = setTimeout(() => {
-      func.apply(null, args);
-    }, wait);
-  };
-}
-
-export function retryWithDelay<T>(
-  fn: () => Promise<T>,
-  retries: number = 3,
-  delay: number = 1000
-): Promise<T> {
-  return fn().catch((error) => {
-    if (retries > 0) {
-      return new Promise((resolve) => {
-        setTimeout(() => {
-          resolve(retryWithDelay(fn, retries - 1, delay * 2));
-        }, delay);
-      });
-    }
-    throw error;
-  });
-}