<template>
  <div style="border: 1px solid #ccc">
    <Toolbar
      style="border-bottom: 1px solid #ccc"
      :editor="editorRef"
      :defaultConfig="toolbarConfig"
      :mode="mode"
    />
    <Editor
      style="height: 150px; overflow-y: hidden;"
      v-model="valueHtml"
      :defaultConfig="editorConfig"
      :mode="mode"
      @onCreated="handleCreated"
      @onChange="handleChange"
    />
  </div>
</template>

<script>
import '@wangeditor/editor/dist/css/style.css' // 引入 css

import {onBeforeUnmount, ref, shallowRef, onMounted, watchEffect, watch} from 'vue'
import { Editor, Toolbar } from '@wangeditor/editor-for-vue'

export default {
  name: 'TitleEditor',
  components: { Editor, Toolbar },
  props: ['modelValue'],
  // emits: ['update:modelValue'], // Vue3 新增 emits， 用于接收父组件传递的自定义事件
  watch: {
    modelValue: {
      handler(newValue, oldValue){
        console.log('===>', newValue, oldValue)
        this.valueHtml = newValue
      },
      immediate: true
    }
  },
  data() {
    return {
      valueHtml: ''
    }
  },
  setup(props, {emit}) {
    // 编辑器实例，必须用 shallowRef
    const editorRef = shallowRef()

    // 内容 HTML
    // 模拟 ajax 异步获取内容
    // onMounted(() => {
    //   setTimeout(() => {
    //     valueHtml.value = props.title
    //   })
    // })

    // watch(() => props.title, (newValue, oldValue)=>{
    //   console.log(newValue, oldValue)
    //   valueHtml.value = newValue
    // })
    const handleChange = instance => {
      const value = instance.getHtml()
      console.log(value)
      emit('update:modelValue', value)
    }

    const toolbarConfig = {
        toolbarKeys: [
          'bold', 'italic', 'underline', 'color', 'bgColor', 'fontSize', 'justifyLeft', 'justifyCenter', 'justifyRight', 'insertLink',
          // 'insertImage', 'deleteImage', 'viewImageLink', 'uploadImage',
          'insertImage', 'uploadImage',
          'clearStyle'
        ],
    }
    const editorConfig = { placeholder: '请输入内容...' }

    // watchEffect(props.title, (newVal, oldVal)=>{
    //   valueHtml = newVal
    // })
    // 组件销毁时，也及时销毁编辑器
    onBeforeUnmount(() => {
      const editor = editorRef.value
      if (editor == null) return
      editor.destroy()
    })

    const handleCreated = (editor) => {
      editorRef.value = editor // 记录 editor 实例，重要！
    }

    return {
      editorRef,
      mode: 'default', // 或 'simple'
      toolbarConfig,
      editorConfig,
      handleCreated,
      handleChange
    };
  }
}
</script>
