import { useState, useCallback } from 'react';
import { useQuery } from '@tanstack/react-query';
import { fileClient } from '../api/fileClient';
import type { FileType } from '../types/file';

// 文件选择器钩子
export interface UseFileSelectorOptions {
  filterType?: 'image' | 'all' | string;
  pageSize?: number;
}

export const useFileSelector = (options: UseFileSelectorOptions = {}) => {
  const { filterType = 'all', pageSize = 50 } = options;

  const [isOpen, setIsOpen] = useState(false);
  const [selectedFiles, setSelectedFiles] = useState<FileType[]>([]);
  const [searchText, setSearchText] = useState('');

  // 获取文件列表
  const {
    data: filesData,
    isLoading,
    error,
    refetch
  } = useQuery({
    queryKey: ['files-for-selection', filterType, searchText],
    queryFn: async () => {
      const response = await fileClient.$get({
        query: {
          page: 1,
          pageSize,
          keyword: searchText || undefined,
        },
      });

      if (!response.ok) {
        throw new Error('获取文件列表失败');
      }

      return await response.json();
    },
    enabled: isOpen,
  });

  // 过滤文件
  const files = filesData?.data?.filter((file) => {
    if (filterType === 'all') return true;
    if (filterType === 'image') return file?.type?.startsWith('image/');
    return file?.type?.includes(filterType);
  }) || [];

  // 选择文件
  const handleSelectFile = useCallback((file: FileType) => {
    setSelectedFiles(prev => {
      const isSelected = prev.some(f => f.id === file.id);
      if (isSelected) {
        return prev.filter(f => f.id !== file.id);
      } else {
        return [...prev, file];
      }
    });
  }, []);

  // 批量选择文件
  const handleSelectFiles = useCallback((files: FileType[]) => {
    setSelectedFiles(files);
  }, []);

  // 清除选择
  const handleClearSelection = useCallback(() => {
    setSelectedFiles([]);
  }, []);

  // 打开选择器
  const handleOpen = useCallback(() => {
    setIsOpen(true);
  }, []);

  // 关闭选择器
  const handleClose = useCallback(() => {
    setIsOpen(false);
    setSearchText('');
  }, []);

  // 确认选择
  const handleConfirm = useCallback(() => {
    setIsOpen(false);
    setSearchText('');
    return selectedFiles;
  }, [selectedFiles]);

  // 搜索文件
  const handleSearch = useCallback((text: string) => {
    setSearchText(text);
  }, []);

  // 检查文件是否被选中
  const isFileSelected = useCallback((fileId: number) => {
    return selectedFiles.some(file => file.id === fileId);
  }, [selectedFiles]);

  return {
    // 数据
    files,
    selectedFiles,

    // 状态
    isOpen,
    isLoading,
    error,
    searchText,

    // 操作
    handleOpen,
    handleClose,
    handleConfirm,
    handleSelectFile,
    handleSelectFiles,
    handleClearSelection,
    handleSearch,
    refetch,

    // 工具函数
    isFileSelected,
  };
};