import React, { useState, useEffect, useCallback } from 'react';
import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/dialog';
import { Input } from '@/components/ui/input';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { Search, RefreshCw, Loader2 } from 'lucide-react';
import { fetchContentLibraryList } from '@/api/content';
import { ContentLibrary } from '@/api/content';
import { useToast } from '@/components/ui/toast';

interface ContentLibrarySelectionDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  selectedLibraries: string[];
  onSelect: (libraries: string[]) => void;
}

export function ContentLibrarySelectionDialog({
  open,
  onOpenChange,
  selectedLibraries,
  onSelect,
}: ContentLibrarySelectionDialogProps) {
  const { toast } = useToast();
  const [searchQuery, setSearchQuery] = useState('');
  const [loading, setLoading] = useState(false);
  const [libraries, setLibraries] = useState<ContentLibrary[]>([]);
  const [tempSelected, setTempSelected] = useState<string[]>([]);

  // 获取内容库列表
  const fetchLibraries = useCallback(async () => {
    setLoading(true);
    try {
      const response = await fetchContentLibraryList(1, 100, searchQuery);
      if (response.code === 200 && response.data) {
        setLibraries(response.data.list);
      } else {
        toast({ title: '获取内容库列表失败', description: response.msg, variant: 'destructive' });
      }
    } catch (error) {
      console.error('获取内容库列表失败:', error);
      toast({ title: '获取内容库列表失败', description: '请检查网络连接', variant: 'destructive' });
    } finally {
      setLoading(false);
    }
  }, [searchQuery, toast]);

  useEffect(() => {
    if (open) {
      fetchLibraries();
      setTempSelected(selectedLibraries);
    }
  }, [open, selectedLibraries, fetchLibraries]);

  const handleRefresh = () => {
    fetchLibraries();
  };

  const handleSelectAll = () => {
    if (tempSelected.length === libraries.length) {
      setTempSelected([]);
    } else {
      setTempSelected(libraries.map(lib => lib.id));
    }
  };

  const handleLibraryToggle = (libraryId: string) => {
    setTempSelected(prev => 
      prev.includes(libraryId) 
        ? prev.filter(id => id !== libraryId)
        : [...prev, libraryId]
    );
  };

  const handleDialogOpenChange = (open: boolean) => {
    if (!open) {
      setTempSelected(selectedLibraries);
    }
    onOpenChange(open);
  };

  const handleConfirm = () => {
    onSelect(tempSelected);
    onOpenChange(false);
  };

  return (
    <Dialog open={open} onOpenChange={handleDialogOpenChange}>
      <DialogContent className="flex flex-col">
        <DialogHeader>
          <DialogTitle>选择内容库</DialogTitle>
        </DialogHeader>

        <div className="flex items-center space-x-2 my-4">
          <div className="relative flex-1">
            <Search className="absolute left-3 top-2.5 h-4 w-4 text-gray-400" />
            <Input
              placeholder="搜索内容库"
              className="pl-9"
              value={searchQuery}
              onChange={(e) => setSearchQuery(e.target.value)}
            />
          </div>
          <Button variant="outline" size="icon" onClick={handleRefresh} disabled={loading}>
            {loading ? <Loader2 className="h-4 w-4 animate-spin" /> : <RefreshCw className="h-4 w-4" />}
          </Button>
        </div>

        <div className="flex justify-between items-center mb-2">
          <div className="text-sm text-gray-500">
            已选择 {tempSelected.length} 个内容库
          </div>
          <div className="flex gap-2">
            <Button 
              variant="outline" 
              size="sm" 
              onClick={handleSelectAll}
              disabled={loading || libraries.length === 0}
            >
              {tempSelected.length === libraries.length ? "取消全选" : "全选"}
            </Button>
          </div>
        </div>

        <div className="flex-1 overflow-y-auto -mx-6 px-6 max-h-[400px]">
          <div className="space-y-2">
            {loading ? (
              <div className="flex items-center justify-center h-full text-gray-500">
                加载中...
              </div>
            ) : libraries.length === 0 ? (
              <div className="flex items-center justify-center h-full text-gray-500">
                暂无数据
              </div>
            ) : (
              libraries.map((library) => (
                <label
                  key={library.id}
                  className="flex items-start space-x-3 p-4 rounded-lg hover:bg-gray-50 cursor-pointer border"
                >
                  <input
                    type="checkbox"
                    checked={tempSelected.includes(library.id)}
                    onChange={() => handleLibraryToggle(library.id)}
                    className="mt-1 w-4 h-4 text-blue-600 bg-gray-100 border-gray-300 rounded focus:ring-blue-500 focus:ring-2"
                  />
                  <div className="flex-1">
                    <div className="flex items-center justify-between">
                      <span className="font-medium">{library.name}</span>
                      <Badge variant="outline">
                        {library.sourceType === 1 ? '文本' : library.sourceType === 2 ? '图片' : '视频'}
                      </Badge>
                    </div>
                    <div className="text-sm text-gray-500 mt-1">
                      <div>创建人: {library.creatorName || '-'}</div>
                      <div>更新时间: {new Date(library.updateTime).toLocaleString()}</div>
                    </div>
                  </div>
                </label>
              ))
            )}
          </div>
        </div>

        <div className="flex justify-between items-center mt-4 pt-4 border-t">
          <div className="text-sm text-gray-500">
            已选择 {tempSelected.length} 个内容库
          </div>
          <div className="flex space-x-2">
            <Button variant="outline" onClick={() => onOpenChange(false)}>
              取消
            </Button>
            <Button onClick={handleConfirm}>
              确定{tempSelected.length > 0 ? ` (${tempSelected.length})` : ''}
            </Button>
          </div>
        </div>
      </DialogContent>
    </Dialog>
  );
}