/**
 * POI Context React Hook
 *
 * Custom hook for managing POI context state and operations
 */

import { useState, useEffect, useCallback } from 'react';
import { poiContextApi } from '@/services/api/poiContextApi';
import type {
  POIContext,
  POIDetectionResponse,
  FeatureImportanceResponse,
  CompetitorAnalysis
} from '@/types/poi';

export interface UsePOIContextOptions {
  tenantId: string;
  autoFetch?: boolean;
}

export interface UsePOIContextResult {
  poiContext: POIContext | null;
  isLoading: boolean;
  isRefreshing: boolean;
  error: string | null;
  isStale: boolean;
  needsRefresh: boolean;
  featureImportance: FeatureImportanceResponse | null;
  competitorAnalysis: CompetitorAnalysis | null;
  competitiveInsights: string[];

  // Actions
  detectPOIs: (latitude: number, longitude: number, forceRefresh?: boolean) => Promise<void>;
  refreshPOIs: () => Promise<void>;
  fetchContext: () => Promise<void>;
  fetchFeatureImportance: () => Promise<void>;
  fetchCompetitorAnalysis: () => Promise<void>;
  deletePOIContext: () => Promise<void>;
}

export function usePOIContext({ tenantId, autoFetch = true }: UsePOIContextOptions): UsePOIContextResult {
  const [poiContext, setPOIContext] = useState<POIContext | null>(null);
  const [isLoading, setIsLoading] = useState(false);
  const [isRefreshing, setIsRefreshing] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [isStale, setIsStale] = useState(false);
  const [needsRefresh, setNeedsRefresh] = useState(false);
  const [featureImportance, setFeatureImportance] = useState<FeatureImportanceResponse | null>(null);
  const [competitorAnalysis, setCompetitorAnalysis] = useState<CompetitorAnalysis | null>(null);
  const [competitiveInsights, setCompetitiveInsights] = useState<string[]>([]);

  const fetchContext = useCallback(async () => {
    if (!tenantId) return;

    try {
      setIsLoading(true);
      setError(null);

      const response = await poiContextApi.getPOIContext(tenantId);
      setPOIContext(response.poi_context);
      setIsStale(response.is_stale);
      setNeedsRefresh(response.needs_refresh);
    } catch (err: any) {
      if (err.response?.status === 404) {
        // No POI context found - this is normal for new tenants
        setPOIContext(null);
        setError(null);
      } else {
        setError(err.message || 'Failed to fetch POI context');
        console.error('Error fetching POI context:', err);
      }
    } finally {
      setIsLoading(false);
    }
  }, [tenantId]);

  const detectPOIs = useCallback(async (
    latitude: number,
    longitude: number,
    forceRefresh: boolean = false
  ) => {
    if (!tenantId) return;

    try {
      setIsLoading(true);
      setError(null);

      const response = await poiContextApi.detectPOIs(
        tenantId,
        latitude,
        longitude,
        forceRefresh
      );

      setPOIContext(response.poi_context);
      setIsStale(false);
      setNeedsRefresh(false);

      // Update competitor analysis if available
      if (response.competitor_analysis) {
        setCompetitorAnalysis(response.competitor_analysis);
      }

      // Update competitive insights if available
      if (response.competitive_insights) {
        setCompetitiveInsights(response.competitive_insights);
      }
    } catch (err: any) {
      setError(err.message || 'Failed to detect POIs');
      console.error('Error detecting POIs:', err);
    } finally {
      setIsLoading(false);
    }
  }, [tenantId]);

  const refreshPOIs = useCallback(async () => {
    if (!tenantId) return;

    try {
      setIsRefreshing(true);
      setError(null);

      const response = await poiContextApi.refreshPOIContext(tenantId);
      setPOIContext(response.poi_context);
      setIsStale(false);
      setNeedsRefresh(false);

      // Update competitor analysis if available
      if (response.competitor_analysis) {
        setCompetitorAnalysis(response.competitor_analysis);
      }

      // Update competitive insights if available
      if (response.competitive_insights) {
        setCompetitiveInsights(response.competitive_insights);
      }
    } catch (err: any) {
      setError(err.message || 'Failed to refresh POI context');
      console.error('Error refreshing POI context:', err);
    } finally {
      setIsRefreshing(false);
    }
  }, [tenantId]);

  const fetchFeatureImportance = useCallback(async () => {
    if (!tenantId) return;

    try {
      const response = await poiContextApi.getFeatureImportance(tenantId);
      setFeatureImportance(response);
    } catch (err: any) {
      console.error('Error fetching feature importance:', err);
    }
  }, [tenantId]);

  const fetchCompetitorAnalysis = useCallback(async () => {
    if (!tenantId) return;

    try {
      const response = await poiContextApi.getCompetitorAnalysis(tenantId);
      setCompetitorAnalysis(response.competitor_analysis);
      setCompetitiveInsights(response.insights);
    } catch (err: any) {
      console.error('Error fetching competitor analysis:', err);
    }
  }, [tenantId]);

  const deletePOIContext = useCallback(async () => {
    if (!tenantId) return;

    try {
      await poiContextApi.deletePOIContext(tenantId);
      setPOIContext(null);
      setFeatureImportance(null);
      setCompetitorAnalysis(null);
      setCompetitiveInsights([]);
      setIsStale(false);
      setNeedsRefresh(false);
    } catch (err: any) {
      setError(err.message || 'Failed to delete POI context');
      console.error('Error deleting POI context:', err);
    }
  }, [tenantId]);

  // Auto-fetch on mount if enabled
  useEffect(() => {
    if (autoFetch && tenantId) {
      fetchContext();
    }
  }, [autoFetch, tenantId, fetchContext]);

  return {
    poiContext,
    isLoading,
    isRefreshing,
    error,
    isStale,
    needsRefresh,
    featureImportance,
    competitorAnalysis,
    competitiveInsights,
    detectPOIs,
    refreshPOIs,
    fetchContext,
    fetchFeatureImportance,
    fetchCompetitorAnalysis,
    deletePOIContext
  };
}