'use client';

/**
 * TipTap 에디터 툴바
 */

import { useCallback, useRef } from 'react';
import { Editor } from '@tiptap/react';
import { Button } from '@/components/ui/button';
import {
  Bold,
  Italic,
  Underline,
  Strikethrough,
  AlignLeft,
  AlignCenter,
  AlignRight,
  List,
  ListOrdered,
  Link as LinkIcon,
  Image as ImageIcon,
  Undo,
  Redo,
} from 'lucide-react';
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from '@/components/ui/popover';
import { Input } from '@/components/ui/input';
import { useState } from 'react';

interface MenuBarProps {
  editor: Editor | null;
  onImageUpload?: (file: File) => Promise<string>;
}

export function MenuBar({ editor, onImageUpload }: MenuBarProps) {
  const [linkUrl, setLinkUrl] = useState('');
  const [isLinkPopoverOpen, setIsLinkPopoverOpen] = useState(false);
  const fileInputRef = useRef<HTMLInputElement>(null);

  // 링크 추가 (hooks는 조건문 전에 선언해야 함)
  const handleAddLink = useCallback(() => {
    if (!editor) return;
    if (linkUrl) {
      editor
        .chain()
        .focus()
        .extendMarkRange('link')
        .setLink({ href: linkUrl })
        .run();
      setLinkUrl('');
      setIsLinkPopoverOpen(false);
    }
  }, [editor, linkUrl]);

  // 링크 제거
  const handleRemoveLink = useCallback(() => {
    if (!editor) return;
    editor.chain().focus().unsetLink().run();
    setIsLinkPopoverOpen(false);
  }, [editor]);

  // 이미지 업로드
  const handleImageUpload = useCallback(async (e: React.ChangeEvent<HTMLInputElement>) => {
    if (!editor) return;
    const file = e.target.files?.[0];
    if (!file) return;

    if (onImageUpload) {
      try {
        const url = await onImageUpload(file);
        editor.chain().focus().setImage({ src: url }).run();
      } catch (error) {
        console.error('Image upload failed:', error);
      }
    } else {
      // 기본: Base64로 삽입 (개발용)
      const reader = new FileReader();
      reader.onload = () => {
        const base64 = reader.result as string;
        editor.chain().focus().setImage({ src: base64 }).run();
      };
      reader.readAsDataURL(file);
    }

    // 파일 input 초기화
    if (fileInputRef.current) {
      fileInputRef.current.value = '';
    }
  }, [editor, onImageUpload]);

  // editor가 없으면 렌더링 안 함 (hooks 이후에 체크)
  if (!editor) {
    return null;
  }

  const buttonClass = 'h-8 w-8 p-0';
  const activeClass = 'bg-gray-200';

  return (
    <div className="flex flex-wrap items-center gap-1 border-b border-gray-200 p-2 bg-gray-50 rounded-t-md">
      {/* Undo/Redo */}
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={buttonClass}
        onClick={() => editor.chain().focus().undo().run()}
        disabled={!editor.can().undo()}
        title="실행 취소"
      >
        <Undo className="h-4 w-4" />
      </Button>
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={buttonClass}
        onClick={() => editor.chain().focus().redo().run()}
        disabled={!editor.can().redo()}
        title="다시 실행"
      >
        <Redo className="h-4 w-4" />
      </Button>

      <div className="w-px h-6 bg-gray-300 mx-1" />

      {/* 텍스트 스타일 */}
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={`${buttonClass} ${editor.isActive('bold') ? activeClass : ''}`}
        onClick={() => editor.chain().focus().toggleBold().run()}
        title="굵게 (Ctrl+B)"
      >
        <Bold className="h-4 w-4" />
      </Button>
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={`${buttonClass} ${editor.isActive('italic') ? activeClass : ''}`}
        onClick={() => editor.chain().focus().toggleItalic().run()}
        title="기울임 (Ctrl+I)"
      >
        <Italic className="h-4 w-4" />
      </Button>
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={`${buttonClass} ${editor.isActive('underline') ? activeClass : ''}`}
        onClick={() => editor.chain().focus().toggleUnderline().run()}
        title="밑줄 (Ctrl+U)"
      >
        <Underline className="h-4 w-4" />
      </Button>
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={`${buttonClass} ${editor.isActive('strike') ? activeClass : ''}`}
        onClick={() => editor.chain().focus().toggleStrike().run()}
        title="취소선"
      >
        <Strikethrough className="h-4 w-4" />
      </Button>

      <div className="w-px h-6 bg-gray-300 mx-1" />

      {/* 정렬 */}
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={`${buttonClass} ${editor.isActive({ textAlign: 'left' }) ? activeClass : ''}`}
        onClick={() => editor.chain().focus().setTextAlign('left').run()}
        title="왼쪽 정렬"
      >
        <AlignLeft className="h-4 w-4" />
      </Button>
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={`${buttonClass} ${editor.isActive({ textAlign: 'center' }) ? activeClass : ''}`}
        onClick={() => editor.chain().focus().setTextAlign('center').run()}
        title="가운데 정렬"
      >
        <AlignCenter className="h-4 w-4" />
      </Button>
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={`${buttonClass} ${editor.isActive({ textAlign: 'right' }) ? activeClass : ''}`}
        onClick={() => editor.chain().focus().setTextAlign('right').run()}
        title="오른쪽 정렬"
      >
        <AlignRight className="h-4 w-4" />
      </Button>

      <div className="w-px h-6 bg-gray-300 mx-1" />

      {/* 목록 */}
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={`${buttonClass} ${editor.isActive('bulletList') ? activeClass : ''}`}
        onClick={() => editor.chain().focus().toggleBulletList().run()}
        title="글머리 기호"
      >
        <List className="h-4 w-4" />
      </Button>
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={`${buttonClass} ${editor.isActive('orderedList') ? activeClass : ''}`}
        onClick={() => editor.chain().focus().toggleOrderedList().run()}
        title="번호 매기기"
      >
        <ListOrdered className="h-4 w-4" />
      </Button>

      <div className="w-px h-6 bg-gray-300 mx-1" />

      {/* 링크 */}
      <Popover open={isLinkPopoverOpen} onOpenChange={setIsLinkPopoverOpen}>
        <PopoverTrigger asChild>
          <Button
            type="button"
            variant="ghost"
            size="sm"
            className={`${buttonClass} ${editor.isActive('link') ? activeClass : ''}`}
            title="링크"
          >
            <LinkIcon className="h-4 w-4" />
          </Button>
        </PopoverTrigger>
        <PopoverContent className="w-80 p-3">
          <div className="space-y-3">
            <Input
              placeholder="URL을 입력하세요"
              value={linkUrl}
              onChange={(e) => setLinkUrl(e.target.value)}
              onKeyDown={(e) => e.key === 'Enter' && handleAddLink()}
            />
            <div className="flex gap-2">
              <Button size="sm" onClick={handleAddLink} className="flex-1">
                링크 추가
              </Button>
              {editor.isActive('link') && (
                <Button size="sm" variant="outline" onClick={handleRemoveLink}>
                  제거
                </Button>
              )}
            </div>
          </div>
        </PopoverContent>
      </Popover>

      {/* 이미지 */}
      <Button
        type="button"
        variant="ghost"
        size="sm"
        className={buttonClass}
        onClick={() => fileInputRef.current?.click()}
        title="이미지"
      >
        <ImageIcon className="h-4 w-4" />
      </Button>
      <input
        ref={fileInputRef}
        type="file"
        accept="image/*"
        onChange={handleImageUpload}
        className="hidden"
      />
    </div>
  );
}