<template>
  <div class="flex flex-col h-full bg-white relative">

    <div v-if="editor" class="border-b border-gray-100 px-4 py-2 flex flex-wrap gap-1 items-center sticky top-0 bg-white z-20 shadow-sm select-none">

      <div class="flex gap-0.5 border-r border-gray-200 pr-2 mr-2">
        <button @click="editor.chain().focus().toggleBold().run()" :class="{ 'is-active': editor.isActive('bold') }" class="toolbar-btn font-bold" title="Fett">B</button>
        <button @click="editor.chain().focus().toggleItalic().run()" :class="{ 'is-active': editor.isActive('italic') }" class="toolbar-btn italic" title="Kursiv">I</button>
        <button @click="editor.chain().focus().toggleStrike().run()" :class="{ 'is-active': editor.isActive('strike') }" class="toolbar-btn line-through" title="Durchgestrichen">S</button>
        <button @click="editor.chain().focus().toggleHighlight().run()" :class="{ 'is-active': editor.isActive('highlight') }" class="toolbar-btn text-yellow-500 font-bold" title="Markieren">M</button>
      </div>

      <div class="flex gap-0.5 border-r border-gray-200 pr-2 mr-2">
        <button @click="editor.chain().focus().toggleHeading({ level: 1 }).run()" :class="{ 'is-active': editor.isActive('heading', { level: 1 }) }" class="toolbar-btn" title="H1">H1</button>
        <button @click="editor.chain().focus().toggleHeading({ level: 2 }).run()" :class="{ 'is-active': editor.isActive('heading', { level: 2 }) }" class="toolbar-btn" title="H2">H2</button>
        <button @click="editor.chain().focus().toggleCodeBlock().run()" :class="{ 'is-active': editor.isActive('codeBlock') }" class="toolbar-btn font-mono text-xs" title="Code Block">&lt;/&gt;</button>
      </div>

      <div class="flex gap-0.5 border-r border-gray-200 pr-2 mr-2">
        <button @click="editor.chain().focus().toggleBulletList().run()" :class="{ 'is-active': editor.isActive('bulletList') }" class="toolbar-btn" title="Liste">•</button>
        <button @click="editor.chain().focus().toggleTaskList().run()" :class="{ 'is-active': editor.isActive('taskList') }" class="toolbar-btn" title="Checkliste">☑</button>
      </div>

      <div class="flex gap-0.5 items-center">
        <button @click="editor.chain().focus().insertTable({ rows: 3, cols: 3, withHeaderRow: true }).run()" class="toolbar-btn" title="Tabelle">▦</button>
        <button @click="addVideo" class="toolbar-btn text-red-600" title="YouTube Video">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="w-4 h-4"><path d="M10 2a8 8 0 100 16 8 8 0 000-16zM9.555 7.168A1 1 0 008 8v4a1 1 0 001.555.832l3-2a1 1 0 000-1.664l-3-2z" /></svg>
        </button>

        <div v-if="editor.isActive('table')" class="flex gap-0.5 ml-2 pl-2 border-l border-gray-200 items-center">
          <button @click="editor.chain().focus().addColumnAfter().run()" class="toolbar-btn text-xs">+Col</button>
          <button @click="editor.chain().focus().deleteColumn().run()" class="toolbar-btn text-xs text-red-400">-Col</button>
          <button @click="editor.chain().focus().addRowAfter().run()" class="toolbar-btn text-xs">+Row</button>
          <button @click="editor.chain().focus().deleteRow().run()" class="toolbar-btn text-xs text-red-400">-Row</button>
          <button @click="editor.chain().focus().mergeCells().run()" class="toolbar-btn text-xs">Merge</button>
          <button @click="editor.chain().focus().deleteTable().run()" class="toolbar-btn text-red-500 hover:bg-red-50 ml-1">🗑</button>
        </div>
      </div>
    </div>

    <BubbleMenu
        v-if="editor"
        :editor="editor"
        :tippy-options="{ duration: 200, placement: 'top-start', animation: 'scale' }"
        class="bg-white border border-gray-200 text-gray-700 rounded-lg shadow-xl flex items-center p-1 gap-1 z-50"
    >
      <button @click="editor.chain().focus().toggleBold().run()" :class="{ 'is-active': editor.isActive('bold') }" class="bubble-btn font-bold">B</button>
      <button @click="editor.chain().focus().toggleItalic().run()" :class="{ 'is-active': editor.isActive('italic') }" class="bubble-btn italic">I</button>
      <button @click="editor.chain().focus().toggleStrike().run()" :class="{ 'is-active': editor.isActive('strike') }" class="bubble-btn line-through">S</button>
      <button @click="editor.chain().focus().toggleHighlight().run()" :class="{ 'is-active': editor.isActive('highlight') }" class="bubble-btn text-yellow-500 font-bold">M</button>
      <div class="w-px h-4 bg-gray-200 mx-1"></div>
      <button @click="editor.chain().focus().toggleHeading({ level: 2 }).run()" :class="{ 'is-active': editor.isActive('heading', { level: 2 }) }" class="bubble-btn font-bold text-sm">H2</button>
      <div class="w-px h-4 bg-gray-200 mx-1"></div>
      <button @click="setLink" :class="{ 'is-active': editor.isActive('link') }" class="bubble-btn text-sm">Link</button>
    </BubbleMenu>

    <FloatingMenu
        v-if="editor"
        :editor="editor"
        :tippy-options="{ duration: 100, placement: 'right-start' }"
        class="bg-white border border-gray-200 text-gray-600 rounded-lg shadow-lg flex items-center p-1 gap-1 -ml-4"
    >
      <button @click="editor.chain().focus().toggleHeading({ level: 1 }).run()" class="bubble-btn text-xs font-bold" title="H1">H1</button>
      <button @click="editor.chain().focus().toggleHeading({ level: 2 }).run()" class="bubble-btn text-xs font-bold" title="H2">H2</button>
      <button @click="editor.chain().focus().toggleBulletList().run()" class="bubble-btn" title="Liste">•</button>
      <button @click="editor.chain().focus().toggleTaskList().run()" class="bubble-btn" title="Task">☑</button>
      <button @click="editor.chain().focus().insertTable({ rows: 3, cols: 3, withHeaderRow: true }).run()" class="bubble-btn" title="Tabelle">▦</button>
      <button @click="editor.chain().focus().toggleCodeBlock().run()" class="bubble-btn font-mono text-xs" title="Code">&lt;&gt;</button>
    </FloatingMenu>

    <editor-content
        :editor="editor"
        class="flex-1 overflow-y-auto px-8 py-6 prose prose-slate max-w-none focus:outline-none custom-editor-area"
    />

    <div v-if="editor" class="border-t border-gray-100 px-4 py-1 text-xs text-gray-400 flex justify-end bg-gray-50">
      {{ editor.storage.characterCount.words() }} Wörter • {{ editor.storage.characterCount.characters() }} Zeichen
    </div>

  </div>
</template>

<script setup lang="ts">
import { watch } from 'vue'

// Tiptap Core
import { useEditor, EditorContent } from '@tiptap/vue-3'
// @ts-ignore
import { BubbleMenu, FloatingMenu } from '@tiptap/vue-3/menus'

import StarterKit from '@tiptap/starter-kit'
import Placeholder from '@tiptap/extension-placeholder'

// Extensions
import BubbleMenuExtension from '@tiptap/extension-bubble-menu'
import FloatingMenuExtension from '@tiptap/extension-floating-menu'
import Link from '@tiptap/extension-link'
import TaskList from '@tiptap/extension-task-list'
import TaskItem from '@tiptap/extension-task-item'
import Image from '@tiptap/extension-image'
import Highlight from '@tiptap/extension-highlight'
import Youtube from '@tiptap/extension-youtube'
import Typography from '@tiptap/extension-typography'
import CharacterCount from '@tiptap/extension-character-count'

// --- FIX: Standard CodeBlock statt Lowlight nutzen (Vermeidet Vite Fehler) ---
import CodeBlock from '@tiptap/extension-code-block'

// Table Imports
import { Table } from '@tiptap/extension-table'
import { TableRow } from '@tiptap/extension-table-row'
import { TableCell } from '@tiptap/extension-table-cell'
import { TableHeader } from '@tiptap/extension-table-header'

const props = defineProps<{ modelValue: any }>()
const emit = defineEmits(['update:modelValue'])

const editor = useEditor({
  content: props.modelValue,
  extensions: [
    StarterKit.configure({
      codeBlock: false, // Standard StarterKit Block aus, wir laden unseren eigenen
    }),
    Placeholder.configure({ placeholder: 'Tippe "/" oder schreibe los...' }),

    // UI
    BubbleMenuExtension.configure({
      shouldShow: ({ editor, from, to }) => !editor.state.selection.empty && (to - from > 0),
    }),
    FloatingMenuExtension,

    // Basics
    Link.configure({ openOnClick: false, autolink: true }),
    Image,
    Highlight,
    Typography,
    CharacterCount,

    // Struktur
    TaskList,
    TaskItem.configure({ nested: true }),
    Youtube.configure({ width: 640, height: 480 }),

    // Code (Standard Block ohne Bunte Farben, dafür stabil)
    CodeBlock,

    // Tables
    Table.configure({ resizable: true }),
    TableRow,
    TableHeader,
    TableCell,
  ],
  editorProps: {
    attributes: {
      class: 'focus:outline-none min-h-[500px] pb-40',
    },
  },
  onUpdate: ({ editor }) => {
    emit('update:modelValue', editor.getJSON())
  },
})

watch(() => props.modelValue, (val) => {
  if (editor.value && JSON.stringify(val) !== JSON.stringify(editor.value.getJSON())) {
    editor.value.commands.setContent(val, false)
  }
})

// --- ACTIONS ---

const setLink = () => {
  if (!editor.value) return
  const previousUrl = editor.value.getAttributes('link').href
  const url = window.prompt('URL eingeben:', previousUrl)
  if (url === null) return
  if (url === '') {
    editor.value.chain().focus().extendMarkRange('link').unsetLink().run()
    return
  }
  editor.value.chain().focus().extendMarkRange('link').setLink({ href: url }).run()
}

const addVideo = () => {
  const url = prompt('YouTube URL eingeben:')
  if (url && editor.value) {
    editor.value.commands.setYoutubeVideo({ src: url })
  }
}
</script>

<style scoped>
/* Toolbar & Buttons */
.toolbar-btn {
  @apply p-1.5 rounded text-gray-600 hover:bg-gray-100 transition-colors text-sm font-medium min-w-[28px] h-[28px] flex items-center justify-center;
}
.toolbar-btn.is-active {
  @apply bg-gray-200 text-black shadow-inner;
}

.bubble-btn {
  @apply px-2 py-1 hover:bg-gray-100 rounded transition-colors text-sm min-w-[24px] h-[24px] flex items-center justify-center;
}
.bubble-btn.is-active {
  @apply bg-gray-200 text-black;
}

/* EDITOR CSS RESET & STYLES */
:deep(.prose) {

  /* 1. TABLE FIX */
  table {
    width: 100% !important;
    border-collapse: collapse;
    table-layout: fixed;
    margin: 1rem 0;
  }
  th, td {
    border: 1px solid #d1d5db;
    padding: 0.5rem;
    vertical-align: top;
    box-sizing: border-box;
    min-width: 1em;
  }
  th { background-color: #f3f4f6; font-weight: 600; text-align: left; }
  .column-resize-handle { background-color: #3b82f6; bottom: -2px; position: absolute; right: -2px; pointer-events: none; top: 0; width: 4px; }

  /* 2. TASK LIST FIX */
  ul[data-type="taskList"] { list-style: none !important; padding: 0 !important; margin: 0 !important; }
  li[data-type="taskItem"] { display: flex !important; flex-direction: row !important; align-items: flex-start !important; margin-bottom: 0.25rem !important; padding-left: 0 !important; }
  li[data-type="taskItem"] > label { display: inline-flex !important; margin-right: 0.5rem !important; margin-top: 0.25rem !important; user-select: none; cursor: pointer; flex-shrink: 0; }
  li[data-type="taskItem"] > label > input { margin: 0 !important; cursor: pointer; }
  li[data-type="taskItem"] > div { flex: 1 1 auto !important; min-width: 0 !important; display: block !important; }
  li[data-type="taskItem"] div > p { margin: 0 !important; display: block !important; }
  li[data-type="taskItem"]::marker, li[data-type="taskItem"]::before { content: none !important; display: none !important; }

  /* 3. HIGHLIGHT */
  mark { background-color: #fef08a; padding: 0.1rem 0.2rem; border-radius: 0.2rem; }

  /* 4. YOUTUBE / VIDEO */
  div[data-youtube-video] { cursor: move; padding-right: 1.5rem; }
  iframe { border-radius: 8px; box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1); margin: 1rem 0; }

  /* 5. CODE BLOCK (Standard Style - Dark Mode Look) */
  pre {
    background: #0d1117;
    color: #c9d1d9;
    font-family: 'JetBrains Mono', monospace;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin: 1rem 0;
    overflow-x: auto;
  }
  code {
    color: inherit;
    padding: 0;
    background: none;
    font-size: 0.9rem;
  }

  /* Placeholder & Selection */
  .ProseMirror-selectednode { outline: 2px solid #3b82f6; }
  p.is-editor-empty:first-child::before { color: #9ca3af; content: attr(data-placeholder); float: left; height: 0; pointer-events: none; }
  img { max-width: 100%; height: auto; border-radius: 6px; display: block; margin: 1rem 0; }
}
</style>