import React, { useState } from 'react';
import { X, FolderOpen, AlertCircle, CheckCircle, Settings } from 'lucide-react';
import { BatchImportRequest } from '../../types/template';
import { CustomSelect } from '../CustomSelect';
import { invoke } from '@tauri-apps/api/core';
import DirectorySettingsButton from '../DirectorySettingsButton';

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

export const BatchImportModal: React.FC<BatchImportModalProps> = ({
  onClose,
  onImport,
  isLoading,
}) => {
  const [formData, setFormData] = useState<Partial<BatchImportRequest>>({
    folder_path: '',
    project_id: '',
    auto_upload: true,
    max_concurrent: 3,
  });
  const [selectedFolder, setSelectedFolder] = useState<string>('');
  const [errors, setErrors] = useState<Record<string, string>>({});
  const [showAdvanced, setShowAdvanced] = useState(false);

  // 处理文件夹选择
  const handleFolderSelect = async () => {
    try {
      // 使用带默认目录的文件夹选择对话框
      const selected = await invoke<string | null>('select_and_save_directory', {
        settingType: 'template_import',
        title: '选择包含剪映草稿的文件夹'
      });
      if (selected) {
        setSelectedFolder(selected);
        setFormData(prev => ({
          ...prev,
          folder_path: selected,
        }));
        setErrors(prev => ({ ...prev, folder_path: '' }));
      }
    } catch (error) {
      console.error('文件夹选择失败:', error);
    }
  };

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

    if (!formData.folder_path) {
      newErrors.folder_path = '请选择包含剪映草稿的文件夹';
    }

    if (formData.max_concurrent && (formData.max_concurrent < 1 || formData.max_concurrent > 10)) {
      newErrors.max_concurrent = '并发数量应在 1-10 之间';
    }

    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 BatchImportRequest);
    } catch (error) {
      console.error('批量导入失败:', error);
    }
  };


  const concurrentOptions = [
    { value: `1`, label: '1 个（慢速）' },
    { value: `2`, label: '2 个' },
    { value: `3`, label: '3 个（推荐）' },
    { value: `5`, label: '5 个' },
    { value: `10`, label: '10 个（快速）' },
  ];

  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-lg 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">批量导入模板</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">
          {/* 文件夹选择区域 */}
          <div className="mb-6">
            <label className="block text-sm font-medium text-gray-700 mb-2">
              选择文件夹 *
            </label>
            
            <div
              className={`border-2 border-dashed rounded-lg p-6 text-center transition-colors ${
                errors.folder_path
                  ? 'border-red-300 bg-red-50'
                  : 'border-gray-300 hover:border-gray-400'
              }`}
            >
              {selectedFolder ? (
                <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">
                      已选择文件夹
                    </div>
                    <div className="text-xs text-gray-500 break-all">
                      {selectedFolder}
                    </div>
                  </div>
                </div>
              ) : (
                <>
                  <FolderOpen className="w-8 h-8 text-gray-400 mx-auto mb-2" />
                  <div className="text-sm text-gray-600 mb-2">
                    选择包含剪映草稿文件的文件夹
                  </div>
                  <div className="text-xs text-gray-500 mb-3">
                    系统将自动扫描文件夹中的所有 draft_content.json 文件
                  </div>
                </>
              )}
              
              <button
                type="button"
                onClick={handleFolderSelect}
                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"
              >
                <FolderOpen className="w-4 h-4 mr-2" />
                选择文件夹
              </button>
            </div>
            
            {errors.folder_path && (
              <div className="flex items-center mt-2 text-sm text-red-600">
                <AlertCircle className="w-4 h-4 mr-1" />
                {errors.folder_path}
              </div>
            )}

            {/* 目录设置按钮 */}
            <div className="flex justify-end mt-3">
              <DirectorySettingsButton size="sm" variant="ghost" />
            </div>
          </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">
              启用后将自动上传所有模板中的素材文件到云端
            </p>
          </div>

          {/* 高级设置 */}
          <div className="mb-6">
            <button
              type="button"
              onClick={() => setShowAdvanced(!showAdvanced)}
              className="flex items-center text-sm text-blue-600 hover:text-blue-700 transition-colors"
            >
              <Settings className="w-4 h-4 mr-1" />
              高级设置
            </button>
            
            {showAdvanced && (
              <div className="mt-4 p-4 bg-gray-50 rounded-lg">
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-2">
                    最大并发数
                  </label>
                  <CustomSelect
                    value={`${formData.max_concurrent || 3}`}
                    onChange={(value) => setFormData(prev => ({ ...prev, max_concurrent: parseInt(value) }))}
                    options={concurrentOptions}
                    className="w-full"
                  />
                  <p className="text-xs text-gray-500 mt-1">
                    同时处理的模板数量，数值越大速度越快但占用资源越多
                  </p>
                  {errors.max_concurrent && (
                    <div className="flex items-center mt-1 text-sm text-red-600">
                      <AlertCircle className="w-4 h-4 mr-1" />
                      {errors.max_concurrent}
                    </div>
                  )}
                </div>
              </div>
            )}
          </div>

          {/* 提示信息 */}
          <div className="mb-6 p-4 bg-blue-50 border border-blue-200 rounded-lg">
            <div className="flex items-start">
              <AlertCircle className="w-5 h-5 text-blue-600 mr-2 mt-0.5 flex-shrink-0" />
              <div className="text-sm text-blue-800">
                <div className="font-medium mb-1">批量导入说明：</div>
                <ul className="text-xs space-y-1">
                  <li>• 系统将递归扫描选定文件夹中的所有 draft_content.json 文件</li>
                  <li>• 每个文件将作为一个独立的模板进行导入</li>
                  <li>• 导入过程中可以在模板管理页面查看进度</li>
                  <li>• 如果某个模板导入失败，不会影响其他模板的导入</li>
                </ul>
              </div>
            </div>
          </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-green-600 rounded-lg hover:bg-green-700 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
            >
              {isLoading ? '导入中...' : '开始批量导入'}
            </button>
          </div>
        </form>
      </div>
    </div>
  );
};
