'use client';

import { useEditor, EditorContent } from '@tiptap/react';
import StarterKit from '@tiptap/starter-kit';
import Image from '@tiptap/extension-image';
import Link from '@tiptap/extension-link';
import { 
  Bold, 
  Italic, 
  Strikethrough, 
  Code,
  Heading1,
  Heading2,
  Heading3,
  List,
  ListOrdered,
  Quote,
  Undo,
  Redo,
  Link as LinkIcon,
  Image as ImageIcon
} from 'lucide-react';
import { useCallback, useState } from 'react';

interface RichTextEditorProps {
  content: string;
  onChange: (content: string) => void;
}

export default function RichTextEditor({ content, onChange }: RichTextEditorProps) {
  const [uploading, setUploading] = useState(false);

  const editor = useEditor({
    extensions: [
      StarterKit,
      Image.configure({
        HTMLAttributes: {
          class: 'max-w-full h-auto rounded-lg',
        },
      }),
      Link.configure({
        openOnClick: false,
        HTMLAttributes: {
          class: 'text-[#C41E3A] underline',
        },
      }),
    ],
    content,
    onUpdate: ({ editor }) => {
      onChange(editor.getHTML());
    },
  });

  const handleImageUpload = useCallback(async () => {
    const input = document.createElement('input');
    input.type = 'file';
    input.accept = 'image/*';
    
    input.onchange = async (e) => {
      const file = (e.target as HTMLInputElement).files?.[0];
      if (!file) return;

      setUploading(true);
      try {
        const formData = new FormData();
        formData.append('file', file);
        formData.append('type', 'image');

        const res = await fetch('/api/admin/upload', {
          method: 'POST',
          body: formData,
        });

        const data = await res.json();
        if (res.ok && editor) {
          editor.chain().focus().setImage({ src: data.file.url }).run();
        }
      } catch (error) {
        console.error('上传图片失败:', error);
      } finally {
        setUploading(false);
      }
    };

    input.click();
  }, [editor]);

  const addLink = useCallback(() => {
    if (!editor) return;
    
    const url = window.prompt('输入链接地址:');
    if (url) {
      editor.chain().focus().setLink({ href: url }).run();
    }
  }, [editor]);

  if (!editor) {
    return null;
  }

  return (
    <div className="border border-gray-300 rounded-lg overflow-hidden">
      <div className="bg-gray-50 border-b border-gray-300 p-2 flex flex-wrap gap-1">
        <button
          onClick={() => editor.chain().focus().toggleBold().run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('bold') ? 'bg-gray-200' : ''}`}
          title="粗体"
        >
          <Bold className="h-4 w-4" />
        </button>
        <button
          onClick={() => editor.chain().focus().toggleItalic().run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('italic') ? 'bg-gray-200' : ''}`}
          title="斜体"
        >
          <Italic className="h-4 w-4" />
        </button>
        <button
          onClick={() => editor.chain().focus().toggleStrike().run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('strike') ? 'bg-gray-200' : ''}`}
          title="删除线"
        >
          <Strikethrough className="h-4 w-4" />
        </button>
        <button
          onClick={() => editor.chain().focus().toggleCode().run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('code') ? 'bg-gray-200' : ''}`}
          title="代码"
        >
          <Code className="h-4 w-4" />
        </button>
        
        <div className="w-px h-6 bg-gray-300 mx-1 self-center" />
        
        <button
          onClick={() => editor.chain().focus().toggleHeading({ level: 1 }).run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('heading', { level: 1 }) ? 'bg-gray-200' : ''}`}
          title="标题 1"
        >
          <Heading1 className="h-4 w-4" />
        </button>
        <button
          onClick={() => editor.chain().focus().toggleHeading({ level: 2 }).run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('heading', { level: 2 }) ? 'bg-gray-200' : ''}`}
          title="标题 2"
        >
          <Heading2 className="h-4 w-4" />
        </button>
        <button
          onClick={() => editor.chain().focus().toggleHeading({ level: 3 }).run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('heading', { level: 3 }) ? 'bg-gray-200' : ''}`}
          title="标题 3"
        >
          <Heading3 className="h-4 w-4" />
        </button>
        
        <div className="w-px h-6 bg-gray-300 mx-1 self-center" />
        
        <button
          onClick={() => editor.chain().focus().toggleBulletList().run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('bulletList') ? 'bg-gray-200' : ''}`}
          title="无序列表"
        >
          <List className="h-4 w-4" />
        </button>
        <button
          onClick={() => editor.chain().focus().toggleOrderedList().run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('orderedList') ? 'bg-gray-200' : ''}`}
          title="有序列表"
        >
          <ListOrdered className="h-4 w-4" />
        </button>
        <button
          onClick={() => editor.chain().focus().toggleBlockquote().run()}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('blockquote') ? 'bg-gray-200' : ''}`}
          title="引用"
        >
          <Quote className="h-4 w-4" />
        </button>
        
        <div className="w-px h-6 bg-gray-300 mx-1 self-center" />
        
        <button
          onClick={addLink}
          className={`p-2 rounded hover:bg-gray-200 ${editor.isActive('link') ? 'bg-gray-200' : ''}`}
          title="链接"
        >
          <LinkIcon className="h-4 w-4" />
        </button>
        <button
          onClick={handleImageUpload}
          disabled={uploading}
          className="p-2 rounded hover:bg-gray-200 disabled:opacity-50"
          title="上传图片"
        >
          {uploading ? (
            <div className="h-4 w-4 border-2 border-gray-400 border-t-transparent rounded-full animate-spin" />
          ) : (
            <ImageIcon className="h-4 w-4" />
          )}
        </button>
        
        <div className="w-px h-6 bg-gray-300 mx-1 self-center" />
        
        <button
          onClick={() => editor.chain().focus().undo().run()}
          disabled={!editor.can().undo()}
          className="p-2 rounded hover:bg-gray-200 disabled:opacity-50"
          title="撤销"
        >
          <Undo className="h-4 w-4" />
        </button>
        <button
          onClick={() => editor.chain().focus().redo().run()}
          disabled={!editor.can().redo()}
          className="p-2 rounded hover:bg-gray-200 disabled:opacity-50"
          title="重做"
        >
          <Redo className="h-4 w-4" />
        </button>
      </div>
      
      <EditorContent 
        editor={editor} 
        className="prose prose-sm max-w-none p-4 min-h-[300px] focus:outline-none"
      />
    </div>
  );
}