"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 Placeholder from "@tiptap/extension-placeholder";
import CodeBlockLowlight from "@tiptap/extension-code-block-lowlight";
import { common, createLowlight } from "lowlight";
import { Toggle } from "@/components/ui/toggle";
import dynamic from "next/dynamic";
import {
  Bold,
  Italic,
  Strikethrough,
  Code,
  Heading1,
  Heading2,
  Heading3,
  Quote,
  List,
  ListOrdered,
  Link as LinkIcon,
  ImageIcon,
  CodeSquare,
  Minus,
  Undo2,
  Redo2,
  Maximize2,
  Minimize2,
  FileText,
} from "lucide-react";

const MarkdownEditor = dynamic(() => import("./MarkdownEditor"), { ssr: false });

const lowlight = createLowlight(common);

interface RichEditorProps {
  value: string;
  onChange: (html: string) => void;
  placeholder?: string;
  isFullscreen?: boolean;
  isMarkdown?: boolean;
  onToggleFullscreen?: () => void;
  onSwitchToMarkdown?: () => void;
}

export default function RichEditor({
  value,
  onChange,
  placeholder = "开始写文章...",
  isFullscreen,
  isMarkdown,
  onToggleFullscreen,
  onSwitchToMarkdown,
}: RichEditorProps) {
  const editor = useEditor({
    extensions: [
      StarterKit.configure({
        codeBlock: false,
      }),
      Image.configure({
        HTMLAttributes: { class: "rounded-lg my-4" },
      }),
      Link.configure({
        openOnClick: false,
        HTMLAttributes: {
          class: "text-primary underline underline-offset-2",
        },
      }),
      Placeholder.configure({ placeholder }),
      CodeBlockLowlight.configure({ lowlight }),
    ],
    content: value,
    onUpdate: ({ editor }) => {
      onChange(editor.getHTML());
    },
    editorProps: {
      attributes: {
        class: "prose-literary min-h-[300px] px-4 py-3 focus:outline-none",
      },
    },
  });

  if (!editor) return null;

  function addLink() {
    const url = window.prompt("输入链接地址：");
    if (url) {
      editor
        .chain()
        .focus()
        .extendMarkRange("link")
        .setLink({ href: url })
        .run();
    }
  }

  function addImage() {
    const url = window.prompt("输入图片地址：");
    if (url) {
      editor.chain().focus().setImage({ src: url }).run();
    }
  }

  const isFs = !!isFullscreen;

  return (
    <div className={isFs ? "flex flex-col h-full bg-transparent" : "rounded-xl border border-border bg-card overflow-hidden"}>
      {/* 工具栏 — 始终显示 */}
      <div className={`flex flex-wrap items-center gap-0.5 border-b border-border/50 shrink-0 ${isFs ? "px-4 py-2.5" : "px-2 py-1.5 bg-muted/30"}`}>
        {/* 富文本格式按钮 — Markdown 模式下禁用 */}
        <Toggle
          size="sm"
          pressed={editor.isActive("heading", { level: 1 })}
          onPressedChange={() => editor.chain().focus().toggleHeading({ level: 1 }).run()}
          disabled={!!isMarkdown}
          aria-label="标题 1"
        >
          <Heading1 className="h-4 w-4" />
        </Toggle>
        <Toggle
          size="sm"
          pressed={editor.isActive("heading", { level: 2 })}
          onPressedChange={() => editor.chain().focus().toggleHeading({ level: 2 }).run()}
          disabled={!!isMarkdown}
          aria-label="标题 2"
        >
          <Heading2 className="h-4 w-4" />
        </Toggle>
        <Toggle
          size="sm"
          pressed={editor.isActive("heading", { level: 3 })}
          onPressedChange={() => editor.chain().focus().toggleHeading({ level: 3 }).run()}
          disabled={!!isMarkdown}
          aria-label="标题 3"
        >
          <Heading3 className="h-4 w-4" />
        </Toggle>

        <div className="w-px h-5 bg-border mx-1" />

        <Toggle
          size="sm"
          pressed={editor.isActive("bold")}
          onPressedChange={() => editor.chain().focus().toggleBold().run()}
          disabled={!!isMarkdown}
          aria-label="粗体"
        >
          <Bold className="h-4 w-4" />
        </Toggle>
        <Toggle
          size="sm"
          pressed={editor.isActive("italic")}
          onPressedChange={() => editor.chain().focus().toggleItalic().run()}
          disabled={!!isMarkdown}
          aria-label="斜体"
        >
          <Italic className="h-4 w-4" />
        </Toggle>
        <Toggle
          size="sm"
          pressed={editor.isActive("strike")}
          onPressedChange={() => editor.chain().focus().toggleStrike().run()}
          disabled={!!isMarkdown}
          aria-label="删除线"
        >
          <Strikethrough className="h-4 w-4" />
        </Toggle>
        <Toggle
          size="sm"
          pressed={editor.isActive("code")}
          onPressedChange={() => editor.chain().focus().toggleCode().run()}
          disabled={!!isMarkdown}
          aria-label="行内代码"
        >
          <Code className="h-4 w-4" />
        </Toggle>

        <div className="w-px h-5 bg-border mx-1" />

        <Toggle
          size="sm"
          pressed={editor.isActive("blockquote")}
          onPressedChange={() => editor.chain().focus().toggleBlockquote().run()}
          disabled={!!isMarkdown}
          aria-label="引用"
        >
          <Quote className="h-4 w-4" />
        </Toggle>
        <Toggle
          size="sm"
          pressed={editor.isActive("bulletList")}
          onPressedChange={() => editor.chain().focus().toggleBulletList().run()}
          disabled={!!isMarkdown}
          aria-label="无序列表"
        >
          <List className="h-4 w-4" />
        </Toggle>
        <Toggle
          size="sm"
          pressed={editor.isActive("orderedList")}
          onPressedChange={() => editor.chain().focus().toggleOrderedList().run()}
          disabled={!!isMarkdown}
          aria-label="有序列表"
        >
          <ListOrdered className="h-4 w-4" />
        </Toggle>

        <div className="w-px h-5 bg-border mx-1" />

        <Toggle
          size="sm"
          pressed={editor.isActive("codeBlock")}
          onPressedChange={() => editor.chain().focus().toggleCodeBlock().run()}
          disabled={!!isMarkdown}
          aria-label="代码块"
        >
          <CodeSquare className="h-4 w-4" />
        </Toggle>
        <Toggle size="sm" onPressedChange={addLink} disabled={!!isMarkdown} aria-label="链接">
          <LinkIcon className="h-4 w-4" />
        </Toggle>
        <Toggle size="sm" onPressedChange={addImage} disabled={!!isMarkdown} aria-label="图片">
          <ImageIcon className="h-4 w-4" />
        </Toggle>
        <Toggle
          size="sm"
          onPressedChange={() => editor.chain().focus().setHorizontalRule().run()}
          disabled={!!isMarkdown}
          aria-label="分割线"
        >
          <Minus className="h-4 w-4" />
        </Toggle>

        <div className="w-px h-5 bg-border mx-1" />

        <Toggle
          size="sm"
          onPressedChange={() => editor.chain().focus().undo().run()}
          disabled={!!isMarkdown || !editor.can().undo()}
          aria-label="撤销"
        >
          <Undo2 className="h-4 w-4" />
        </Toggle>
        <Toggle
          size="sm"
          onPressedChange={() => editor.chain().focus().redo().run()}
          disabled={!!isMarkdown || !editor.can().redo()}
          aria-label="重做"
        >
          <Redo2 className="h-4 w-4" />
        </Toggle>

        <div className="flex-1" />

        {/* Markdown 切换 */}
        {onSwitchToMarkdown && (
          <Toggle
            size="sm"
            pressed={!!isMarkdown}
            onPressedChange={onSwitchToMarkdown}
            aria-label={isMarkdown ? "切换到富文本" : "Markdown 模式"}
            title={isMarkdown ? "切换到富文本" : "Markdown 模式"}
          >
            <FileText className="h-4 w-4" />
          </Toggle>
        )}

        {/* 全屏切换 */}
        {onToggleFullscreen && (
          <Toggle
            size="sm"
            onPressedChange={onToggleFullscreen}
            aria-label={isFullscreen ? "退出全屏" : "全屏写作"}
            title={isFullscreen ? "退出全屏" : "全屏写作"}
          >
            {isFullscreen ? <Minimize2 className="h-4 w-4" /> : <Maximize2 className="h-4 w-4" />}
          </Toggle>
        )}
      </div>

      {/* 内容区域 — 根据模式切换 */}
      <div className={isFs ? "flex-1 overflow-auto" : ""}>
        {isMarkdown ? (
          <MarkdownEditor
            value={value}
            onChange={onChange}
          />
        ) : (
          <EditorContent editor={editor} />
        )}
      </div>
    </div>
  );
}