import React, { useState } from 'react';
import { X, Upload, File, AlertCircle, CheckCircle } from 'lucide-react';
import { invoke } from '@tauri-apps/api/core';
import { ImportTemplateRequest } from '../../types/template';
import { CustomSelect } from '../CustomSelect';
import { useProjectStore } from '../../store/projectStore';

interface ImportTemplateModalProps {
  onClose: () => void;
  onImport: (request: ImportTemplateRequest) => Promise<void>;
  isLoading: boolean;
}

export const ImportTemplateModal: React.FC<ImportTemplateModalProps> = ({
  onClose,
  onImport,
  isLoading,
}) => {
  const [formData, setFormData] = useState<Partial<ImportTemplateRequest>>({
    file_path: '',
    template_name: '',
    project_id: '',
    auto_upload: true,
  });
  const [dragOver, setDragOver] = useState(false);
  const [selectedFile, setSelectedFile] = useState<string>('');
  const [errors, setErrors] = useState<Record<string, string>>({});

  const { projects } = useProjectStore();

  // 处理文件选择
  const handleFileSelect = async () => {
    try {
      // 使用 Tauri 命令选择文件
      const selected = await invoke<string | null>('select_file', {
        filters: [['剪映草稿文件', ['json']]]
      });

      if (selected) {
        setSelectedFile(selected);
        setFormData(prev => ({
          ...prev,
          file_path: selected,
          template_name: prev.template_name || extractTemplateNameFromPath(selected),
        }));
        setErrors(prev => ({ ...prev, file_path: '' }));
      }
    } catch (error) {
      console.error('文件选择失败:', error);
    }
  };

  // 从文件路径提取模板名称
  const extractTemplateNameFromPath = (filePath: string) => {
    const parts = filePath.split(/[/\\]/);
    const fileName = parts[parts.length - 1];
    return fileName.replace('.json', '').replace('draft_content', '模板');
  };

  // 处理拖拽
  const handleDragOver = (e: React.DragEvent) => {
    e.preventDefault();
    setDragOver(true);
  };

  const handleDragLeave = (e: React.DragEvent) => {
    e.preventDefault();
    setDragOver(false);
  };

  const handleDrop = (e: React.DragEvent) => {
    e.preventDefault();
    setDragOver(false);

    const files = Array.from(e.dataTransfer.files);
    const jsonFile = files.find(file => file.name.endsWith('.json'));
    
    if (jsonFile) {
      // 注意：在 Tauri 中，我们需要使用文件路径而不是 File 对象
      // 这里需要根据实际的 Tauri API 来处理文件路径获取
      console.log('拖拽文件:', jsonFile.name);
      // 实际实现中需要获取文件的完整路径
    }
  };

  // 表单验证
  const validateForm = () => {
    const newErrors: Record<string, string> = {};

    if (!formData.file_path) {
      newErrors.file_path = '请选择剪映草稿文件';
    }

    if (!formData.template_name?.trim()) {
      newErrors.template_name = '请输入模板名称';
    }

    setErrors(newErrors);
    return Object.keys(newErrors).length === 0;
  };

  // 处理提交
  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    
    if (!validateForm()) {
      return;
    }

    try {
      await onImport(formData as ImportTemplateRequest);
    } catch (error) {
      console.error('导入失败:', error);
    }
  };

  const projectOptions = [
    { value: '', label: '不关联项目' },
    ...projects.map(project => ({
      value: project.id,
      label: project.name,
    })),
  ];

  return (
    <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
      <div className="bg-white rounded-lg shadow-xl w-full max-w-md mx-4">
        {/* 模态框头部 */}
        <div className="flex items-center justify-between p-6 border-b border-gray-200">
          <h2 className="text-xl font-semibold text-gray-900">导入模板</h2>
          <button
            onClick={onClose}
            className="p-1 rounded-full hover:bg-gray-100 transition-colors"
          >
            <X className="w-5 h-5 text-gray-500" />
          </button>
        </div>

        {/* 模态框内容 */}
        <form onSubmit={handleSubmit} className="p-6">
          {/* 文件选择区域 */}
          <div className="mb-6">
            <label className="block text-sm font-medium text-gray-700 mb-2">
              剪映草稿文件 *
            </label>
            
            <div
              className={`border-2 border-dashed rounded-lg p-6 text-center transition-colors ${
                dragOver
                  ? 'border-blue-400 bg-blue-50'
                  : errors.file_path
                  ? 'border-red-300 bg-red-50'
                  : 'border-gray-300 hover:border-gray-400'
              }`}
              onDragOver={handleDragOver}
              onDragLeave={handleDragLeave}
              onDrop={handleDrop}
            >
              {selectedFile ? (
                <div className="flex items-center justify-center">
                  <CheckCircle className="w-8 h-8 text-green-500 mr-3" />
                  <div className="text-left">
                    <div className="text-sm font-medium text-gray-900">
                      {selectedFile.split(/[/\\]/).pop()}
                    </div>
                    <div className="text-xs text-gray-500">
                      {selectedFile}
                    </div>
                  </div>
                </div>
              ) : (
                <>
                  <Upload className="w-8 h-8 text-gray-400 mx-auto mb-2" />
                  <div className="text-sm text-gray-600 mb-2">
                    拖拽 draft_content.json 文件到此处
                  </div>
                  <div className="text-xs text-gray-500 mb-3">
                    或者点击下方按钮选择文件
                  </div>
                </>
              )}
              
              <button
                type="button"
                onClick={handleFileSelect}
                className="inline-flex items-center px-4 py-2 border border-gray-300 rounded-md text-sm font-medium text-gray-700 bg-white hover:bg-gray-50 transition-colors"
              >
                <File className="w-4 h-4 mr-2" />
                选择文件
              </button>
            </div>
            
            {errors.file_path && (
              <div className="flex items-center mt-2 text-sm text-red-600">
                <AlertCircle className="w-4 h-4 mr-1" />
                {errors.file_path}
              </div>
            )}
          </div>

          {/* 模板名称 */}
          <div className="mb-6">
            <label className="block text-sm font-medium text-gray-700 mb-2">
              模板名称 *
            </label>
            <input
              type="text"
              value={formData.template_name || ''}
              onChange={(e) => setFormData(prev => ({ ...prev, template_name: e.target.value }))}
              className={`w-full px-3 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent ${
                errors.template_name ? 'border-red-300' : 'border-gray-300'
              }`}
              placeholder="输入模板名称"
            />
            {errors.template_name && (
              <div className="flex items-center mt-1 text-sm text-red-600">
                <AlertCircle className="w-4 h-4 mr-1" />
                {errors.template_name}
              </div>
            )}
          </div>

          {/* 关联项目 */}
          <div className="mb-6">
            <label className="block text-sm font-medium text-gray-700 mb-2">
              关联项目
            </label>
            <CustomSelect
              value={formData.project_id || ''}
              onChange={(value) => setFormData(prev => ({ ...prev, project_id: value }))}
              options={projectOptions}
              placeholder="选择项目（可选）"
              className="w-full"
            />
          </div>

          {/* 自动上传选项 */}
          <div className="mb-6">
            <label className="flex items-center">
              <input
                type="checkbox"
                checked={formData.auto_upload}
                onChange={(e) => setFormData(prev => ({ ...prev, auto_upload: e.target.checked }))}
                className="rounded border-gray-300 text-blue-600 focus:ring-blue-500"
              />
              <span className="ml-2 text-sm text-gray-700">
                自动上传素材到云端存储
              </span>
            </label>
            <p className="text-xs text-gray-500 mt-1">
              启用后将自动上传模板中的素材文件到云端，便于跨设备访问
            </p>
          </div>

          {/* 操作按钮 */}
          <div className="flex items-center justify-end space-x-3">
            <button
              type="button"
              onClick={onClose}
              className="px-4 py-2 text-sm font-medium text-gray-700 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
            >
              取消
            </button>
            <button
              type="submit"
              disabled={isLoading}
              className="px-4 py-2 text-sm font-medium text-white bg-blue-600 rounded-lg hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
            >
              {isLoading ? '导入中...' : '开始导入'}
            </button>
          </div>
        </form>
      </div>
    </div>
  );
};
