import { useState, useEffect } from 'react';
import { 
  Account, 
  ListAccountsBody, 
  ListAccountsResponse, 
  StatsOverview, 
  BusinessCode,
  BatchUpdateBody,
  BatchDeleteBody,
  ScriptUploadItem
} from '@/lib/types';
import { apiClient } from '@/lib/api';
import { toast } from 'sonner';

export interface UseAccountsReturn {
  // 数据状态
  accounts: Account[];
  stats: StatsOverview | null;
  loading: boolean;
  selectedIds: number[];
  
  // 分页和筛选
  pagination: {
    page: number;
    pageSize: number;
    total: number;
    totalPages: number;
  };
  filters: {
    platform: string;
    status: string[];
    ownerId: string;
    search: string;
  };
  sort: {
    field: keyof Account;
    order: 'asc' | 'desc';
  };
  
  // 操作方法
  fetchAccounts: () => Promise<void>;
  fetchStats: () => Promise<void>;
  handleFilterChange: (key: string, value: any) => void;
  handlePageChange: (page: number) => void;
  handlePageSizeChange: (pageSize: number) => void;
  handleSortChange: (field: keyof Account, order: 'asc' | 'desc') => void;
  handleSelectAll: (checked: boolean) => void;
  handleSelectOne: (id: number, checked: boolean) => void;
  handleBatchDelete: () => Promise<void>;
  handleBatchUpdate: (payload: Partial<Pick<Account, 'status' | 'ownerId' | 'notes' | 'platform'>>, targetIds?: number[]) => Promise<void>;
  handleUploadAccounts: (accounts: ScriptUploadItem[], ownerId: string) => Promise<void>;
  setSelectedIds: (ids: number[]) => void;
}

export function useAccounts(): UseAccountsReturn {
  const [accounts, setAccounts] = useState<Account[]>([]);
  const [stats, setStats] = useState<StatsOverview | null>(null);
  const [loading, setLoading] = useState(false);
  const [selectedIds, setSelectedIds] = useState<number[]>([]);
  
  const [pagination, setPagination] = useState({
    page: 1,
    pageSize: 20,
    total: 0,
    totalPages: 0
  });
  
  const [filters, setFilters] = useState({
    platform: '',
    status: [] as string[],
    ownerId: '',
    search: ''
  });
  
  const [sort, setSort] = useState({
    field: 'id' as keyof Account,
    order: 'desc' as 'asc' | 'desc'
  });

  // 获取统计数据
  const fetchStats = async () => {
    try {
      const response = await apiClient.getStatsOverview();
      if (response.code === BusinessCode.Success && response.data) {
        setStats(response.data);
      }
    } catch (error) {
      console.error('Failed to fetch stats:', error);
      toast.error('获取统计数据失败');
    }
  };

  // 获取账户列表
  const fetchAccounts = async () => {
    setLoading(true);
    try {
      const body: ListAccountsBody = {
        filters,
        pagination: {
          page: pagination.page,
          pageSize: pagination.pageSize
        },
        sort
      };
      
      const response = await apiClient.getAccountsList(body);
      if (response.code === BusinessCode.Success && response.data) {
        setAccounts(response.data.list);
        setPagination(prev => ({
          ...prev,
          total: response.data!.pagination.total,
          totalPages: response.data!.pagination.totalPages
        }));
      }
    } catch (error) {
      console.error('Failed to fetch accounts:', error);
      toast.error('获取账户列表失败');
    } finally {
      setLoading(false);
    }
  };

  // 处理筛选变化
  const handleFilterChange = (key: string, value: any) => {
    setFilters({ ...filters, [key]: value });
    setPagination({ ...pagination, page: 1 });
  };

  // 处理分页
  const handlePageChange = (page: number) => {
    setPagination({ ...pagination, page });
  };

  // 处理每页大小变化
  const handlePageSizeChange = (pageSize: number) => {
    setPagination({ ...pagination, pageSize, page: 1 });
  };

  // 处理排序
  const handleSortChange = (field: keyof Account, order: 'asc' | 'desc') => {
    setSort({ field, order });
  };

  // 处理全选
  const handleSelectAll = (checked: boolean) => {
    if (checked) {
      setSelectedIds(accounts.map(account => account.id));
    } else {
      setSelectedIds([]);
    }
  };

  // 处理单选
  const handleSelectOne = (id: number, checked: boolean) => {
    if (checked) {
      setSelectedIds([...selectedIds, id]);
    } else {
      setSelectedIds(selectedIds.filter(selectedId => selectedId !== id));
    }
  };

  // 批量删除
  const handleBatchDelete = async () => {
    if (selectedIds.length === 0) return;
    
    if (!confirm(`确认删除 ${selectedIds.length} 个账户？`)) return;
    
    try {
      const response = await apiClient.batchDeleteAccounts({ ids: selectedIds });
      if (response.code === BusinessCode.Success) {
        setSelectedIds([]);
        await fetchAccounts();
        await fetchStats();
        toast.success(`成功删除 ${response.data?.deletedCount || 0} 个账户`);
      }
    } catch (error) {
      console.error('Failed to delete accounts:', error);
      toast.error('删除失败，请检查网络连接后重试');
    }
  };

  // 批量更新
  const handleBatchUpdate = async (payload: Partial<Pick<Account, 'status' | 'ownerId' | 'notes' | 'platform'>>, targetIds?: number[]) => {
    const idsToUpdate = targetIds || selectedIds;
    console.log('handleBatchUpdate 被调用, idsToUpdate:', idsToUpdate);
    console.log('payload:', payload);
    
    if (idsToUpdate.length === 0) {
      console.log('idsToUpdate为空，直接返回');
      return;
    }
    
    if (Object.keys(payload).length === 0) {
      toast.warning('请至少选择一个字段进行更新');
      return;
    }
    
    try {
      console.log('发送批量更新请求...');
      const response = await apiClient.batchUpdateAccounts({ ids: idsToUpdate, payload });
      console.log('批量更新响应:', response);
      
      if (response.code === BusinessCode.Success) {
        if (!targetIds) {
          // 只有在没有指定目标ID时才清空选中状态（批量操作时）
          setSelectedIds([]);
        }
        await fetchAccounts();
        await fetchStats();
        toast.success(`成功更新 ${response.data?.updatedCount || 0} 个账户`);
      }
    } catch (error) {
      console.error('Failed to update accounts:', error);
      toast.error('更新失败，请检查网络连接后重试');
    }
  };

  // 上传账户
  const handleUploadAccounts = async (uploadAccounts: ScriptUploadItem[], ownerId: string) => {
    try {
      const response = await apiClient.uploadAccounts(uploadAccounts, ownerId);
      if (response.code === BusinessCode.Success) {
        await fetchAccounts();
        await fetchStats();
        toast.success(`成功处理 ${response.data?.processedCount || 0} 个账户 (${response.data?.createdCount || 0} 个新建, ${response.data?.updatedCount || 0} 个更新)`);
        return;
      }
    } catch (error) {
      console.error('Failed to upload accounts:', error);
      toast.error('上传失败，请检查网络连接后重试');
    }
  };

  // 初始化数据
  useEffect(() => {
    fetchAccounts();
  }, [filters, pagination.page, pagination.pageSize, sort]);

  // 只在开始时获取统计数据
  useEffect(() => {
    fetchStats();
  }, []);

  return {
    accounts,
    stats,
    loading,
    selectedIds,
    pagination,
    filters,
    sort,
    fetchAccounts,
    fetchStats,
    handleFilterChange,
    handlePageChange,
    handlePageSizeChange,
    handleSortChange,
    handleSelectAll,
    handleSelectOne,
    handleBatchDelete,
    handleBatchUpdate,
    handleUploadAccounts,
    setSelectedIds
  };
}