// frontend/src/api/hooks/useTenant.ts
/**
 * Tenant Management Hooks
 */

import { useState, useCallback } from 'react';
import { tenantService } from '../services';
import type {
  TenantInfo,
  TenantCreate,
  TenantUpdate,
  TenantMember,
  InviteUser,
  TenantStats,
} from '../types';

export const useTenant = () => {
  const [tenants, setTenants] = useState<TenantInfo[]>([]);
  const [currentTenant, setCurrentTenant] = useState<TenantInfo | null>(null);
  const [members, setMembers] = useState<TenantMember[]>([]);
  const [stats, setStats] = useState<TenantStats | null>(null);
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const createTenant = useCallback(async (data: TenantCreate): Promise<TenantInfo> => {
    try {
      setIsLoading(true);
      setError(null);

      const tenant = await tenantService.createTenant(data);
      setTenants(prev => [...prev, tenant]);
      setCurrentTenant(tenant);
      
      return tenant;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to create tenant';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const getTenant = useCallback(async (tenantId: string): Promise<TenantInfo> => {
    try {
      setIsLoading(true);
      setError(null);

      const tenant = await tenantService.getTenant(tenantId);
      setCurrentTenant(tenant);
      
      return tenant;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to get tenant';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const updateTenant = useCallback(async (tenantId: string, data: TenantUpdate): Promise<TenantInfo> => {
    try {
      setIsLoading(true);
      setError(null);

      const updatedTenant = await tenantService.updateTenant(tenantId, data);
      setCurrentTenant(updatedTenant);
      setTenants(prev => prev.map(t => t.id === tenantId ? updatedTenant : t));
      
      return updatedTenant;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to update tenant';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const getUserTenants = useCallback(async (): Promise<TenantInfo[]> => {
    try {
      setIsLoading(true);
      setError(null);

      const userTenants = await tenantService.getUserTenants();
      setTenants(userTenants);
      
      return userTenants;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to get user tenants';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const getTenantMembers = useCallback(async (tenantId: string): Promise<TenantMember[]> => {
    try {
      setIsLoading(true);
      setError(null);

      const response = await tenantService.getTenantMembers(tenantId);
      setMembers(response.data);
      
      return response.data;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to get tenant members';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const inviteUser = useCallback(async (tenantId: string, invitation: InviteUser): Promise<void> => {
    try {
      setIsLoading(true);
      setError(null);

      await tenantService.inviteUser(tenantId, invitation);
      
      // Refresh members list
      await getTenantMembers(tenantId);
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to invite user';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, [getTenantMembers]);

  const removeMember = useCallback(async (tenantId: string, userId: string): Promise<void> => {
    try {
      setIsLoading(true);
      setError(null);

      await tenantService.removeMember(tenantId, userId);
      setMembers(prev => prev.filter(m => m.user_id !== userId));
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to remove member';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const updateMemberRole = useCallback(async (tenantId: string, userId: string, role: string): Promise<void> => {
    try {
      setIsLoading(true);
      setError(null);

      const updatedMember = await tenantService.updateMemberRole(tenantId, userId, role);
      setMembers(prev => prev.map(m => m.user_id === userId ? updatedMember : m));
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to update member role';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const getTenantStats = useCallback(async (tenantId: string): Promise<TenantStats> => {
    try {
      setIsLoading(true);
      setError(null);

      const tenantStats = await tenantService.getTenantStats(tenantId);
      setStats(tenantStats);
      
      return tenantStats;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to get tenant stats';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  return {
    tenants,
    currentTenant,
    members,
    stats,
    isLoading,
    error,
    createTenant,
    getTenant,
    updateTenant,
    getUserTenants,
    getTenantMembers,
    inviteUser,
    removeMember,
    updateMemberRole,
    getTenantStats,
    clearError: () => setError(null),
  };
};