'use client';

import { useState, useEffect } from 'react';
import { useRouter } from 'next/navigation';
import { useAuth } from '@/lib/auth';
import { ProtectedRoute } from '@/lib/auth';
import { limqRequest } from '@/lib/api';

interface ShortUrlData {
  originalUrl: string;
  customSlug?: string;
  title: string;
  description?: string;
  tags?: string[];
}

export default function CreateShortUrlPage() {
  return (
    <ProtectedRoute>
      <CreateShortUrlForm />
    </ProtectedRoute>
  );
}

function CreateShortUrlForm() {
  const router = useRouter();
  const { user } = useAuth();
  
  const [formData, setFormData] = useState<ShortUrlData>({
    originalUrl: '',
    customSlug: '',
    title: '',
    description: '',
    tags: [],
  });
  
  const [tagInput, setTagInput] = useState('');
  const [isSubmitting, setIsSubmitting] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [success, setSuccess] = useState(false);
  
  // 使用 useEffect 在加载时添加用户信息到表单数据中
  useEffect(() => {
    if (user) {
      console.log('当前用户:', user.email);
      // 可以在这里添加用户相关数据到表单中
    }
  }, [user]);
  
  const handleChange = (e: React.ChangeEvent<HTMLInputElement | HTMLTextAreaElement>) => {
    const { name, value } = e.target;
    setFormData(prev => ({
      ...prev,
      [name]: value
    }));
  };
  
  const handleTagKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
    if (e.key === 'Enter' && tagInput.trim()) {
      e.preventDefault();
      addTag();
    }
  };
  
  const addTag = () => {
    if (tagInput.trim() && !formData.tags?.includes(tagInput.trim())) {
      setFormData(prev => ({
        ...prev,
        tags: [...(prev.tags || []), tagInput.trim()]
      }));
      setTagInput('');
    }
  };
  
  const removeTag = (tagToRemove: string) => {
    setFormData(prev => ({
      ...prev,
      tags: prev.tags?.filter(tag => tag !== tagToRemove)
    }));
  };
  
  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setIsSubmitting(true);
    setError(null);
    
    try {
      // 验证必填字段
      if (!formData.originalUrl) {
        throw new Error('原始 URL 是必填项');
      }
      
      if (!formData.title) {
        throw new Error('标题是必填项');
      }
      
      // 按照API要求构建请求数据
      const requestData = {
        type: "shorturl",
        attributes: {
          // 可以添加任何额外属性，但attributes不能为空
          icon: ""
        },
        shortUrl: {
          url: formData.originalUrl,
          slug: formData.customSlug || undefined,
          title: formData.title,
          name: formData.title,
          description: formData.description || ""
        },
        // 如果有team或project ID也可以添加
        // teamId: "your-team-id",
        // projectId: "your-project-id",
        tagIds: formData.tags && formData.tags.length > 0 ? formData.tags : undefined
      };
      
      // 调用 API 创建 shorturl 资源
      const response = await limqRequest('resource/shorturl', 'POST', requestData as unknown as Record<string, unknown>);
      
      console.log('创建成功:', response);
      setSuccess(true);
      
      // 2秒后跳转到链接列表页面
      setTimeout(() => {
        router.push('/links');
      }, 2000);
      
    } catch (err) {
      console.error('创建短链接失败:', err);
      setError(err instanceof Error ? err.message : '创建短链接失败，请稍后重试');
    } finally {
      setIsSubmitting(false);
    }
  };
  
  return (
    <div className="container mx-auto px-4 py-8 max-w-3xl">
      <div className="bg-white rounded-lg shadow-md overflow-hidden">
        <div className="border-b border-gray-200 bg-blue-50 px-6 py-4">
          <h1 className="text-xl font-medium text-gray-900">Create Short URL</h1>
          <p className="mt-1 text-sm text-gray-600">
            Create a new short URL resource for tracking and analytics
          </p>
        </div>
        
        {error && (
          <div className="bg-red-50 border-l-4 border-red-500 p-4 m-6">
            <div className="flex">
              <div className="flex-shrink-0">
                <svg className="h-5 w-5 text-red-500" fill="currentColor" viewBox="0 0 20 20">
                  <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                </svg>
              </div>
              <div className="ml-3">
                <p className="text-sm text-red-700">{error}</p>
              </div>
            </div>
          </div>
        )}
        
        {success && (
          <div className="bg-green-50 border-l-4 border-green-500 p-4 m-6">
            <div className="flex">
              <div className="flex-shrink-0">
                <svg className="h-5 w-5 text-green-500" fill="currentColor" viewBox="0 0 20 20">
                  <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clipRule="evenodd" />
                </svg>
              </div>
              <div className="ml-3">
                <p className="text-sm text-green-700">
                  短链接创建成功！正在跳转...
                </p>
              </div>
            </div>
          </div>
        )}
        
        <form onSubmit={handleSubmit} className="p-6 space-y-6">
          {/* 标题 */}
          <div>
            <label htmlFor="title" className="block text-sm font-medium text-gray-700">
              标题 <span className="text-red-500">*</span>
            </label>
            <input
              type="text"
              id="title"
              name="title"
              value={formData.title}
              onChange={handleChange}
              placeholder="例如：产品发布活动"
              className="mt-1 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500 sm:text-sm"
              required
            />
          </div>
          
          {/* 原始 URL */}
          <div>
            <label htmlFor="originalUrl" className="block text-sm font-medium text-gray-700">
              原始 URL <span className="text-red-500">*</span>
            </label>
            <input
              type="url"
              id="originalUrl"
              name="originalUrl"
              value={formData.originalUrl}
              onChange={handleChange}
              placeholder="https://example.com/your-long-url"
              className="mt-1 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500 sm:text-sm"
              required
            />
          </div>
          
          {/* 自定义短链接 */}
          <div>
            <label htmlFor="customSlug" className="block text-sm font-medium text-gray-700">
              自定义短链接 <span className="text-gray-500">(可选)</span>
            </label>
            <div className="flex mt-1 rounded-md shadow-sm">
              <span className="inline-flex items-center px-3 py-2 text-sm text-gray-500 border border-r-0 border-gray-300 rounded-l-md bg-gray-50">
                shorturl.com/
              </span>
              <input
                type="text"
                id="customSlug"
                name="customSlug"
                value={formData.customSlug}
                onChange={handleChange}
                placeholder="custom-slug"
                className="flex-1 block w-full min-w-0 px-3 py-2 border border-gray-300 rounded-none rounded-r-md focus:outline-none focus:ring-blue-500 focus:border-blue-500 sm:text-sm"
              />
            </div>
            <p className="mt-1 text-xs text-gray-500">
              留空将生成随机短链接
            </p>
          </div>
          
          {/* 描述 */}
          <div>
            <label htmlFor="description" className="block text-sm font-medium text-gray-700">
              描述 <span className="text-gray-500">(可选)</span>
            </label>
            <textarea
              id="description"
              name="description"
              value={formData.description}
              onChange={handleChange}
              rows={3}
              placeholder="对此链接的简短描述"
              className="mt-1 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500 sm:text-sm"
            />
          </div>
          
          {/* 标签 */}
          <div>
            <label htmlFor="tagInput" className="block text-sm font-medium text-gray-700">
              标签 <span className="text-gray-500">(可选)</span>
            </label>
            <div className="flex mt-1 rounded-md shadow-sm">
              <input
                type="text"
                id="tagInput"
                value={tagInput}
                onChange={(e) => setTagInput(e.target.value)}
                onKeyDown={handleTagKeyDown}
                placeholder="添加标签并按 Enter"
                className="flex-1 block w-full min-w-0 px-3 py-2 border border-gray-300 rounded-l-md focus:outline-none focus:ring-blue-500 focus:border-blue-500 sm:text-sm"
              />
              <button
                type="button"
                onClick={addTag}
                className="inline-flex items-center px-3 py-2 text-sm font-medium text-white border border-transparent rounded-r-md shadow-sm bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
              >
                添加
              </button>
            </div>
            
            {formData.tags && formData.tags.length > 0 && (
              <div className="flex flex-wrap gap-2 mt-2">
                {formData.tags.map(tag => (
                  <span key={tag} className="inline-flex items-center px-2 py-0.5 text-xs font-medium bg-blue-100 rounded-full text-blue-800">
                    {tag}
                    <button
                      type="button"
                      onClick={() => removeTag(tag)}
                      className="flex-shrink-0 ml-1 text-blue-500 rounded-full hover:text-blue-700 focus:outline-none"
                    >
                      <span className="sr-only">删除标签 {tag}</span>
                      <svg className="w-3 h-3" fill="currentColor" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg">
                        <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                      </svg>
                    </button>
                  </span>
                ))}
              </div>
            )}
          </div>
          
          {/* 提交按钮 */}
          <div className="flex justify-end pt-4 border-t border-gray-200">
            <button
              type="button"
              onClick={() => router.back()}
              className="px-4 py-2 text-sm font-medium text-gray-700 bg-white border border-gray-300 rounded-md shadow-sm hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 mr-3"
            >
              取消
            </button>
            <button
              type="submit"
              disabled={isSubmitting}
              className="inline-flex justify-center px-4 py-2 text-sm font-medium text-white bg-blue-600 border border-transparent rounded-md shadow-sm hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
            >
              {isSubmitting ? (
                <>
                  <svg className="w-5 h-5 mr-2 -ml-1 animate-spin" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
                    <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4"></circle>
                    <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
                  </svg>
                  处理中...
                </>
              ) : '创建短链接'}
            </button>
          </div>
        </form>
      </div>
    </div>
  );
}