<template>
  <div>
    <el-upload
      :action="uploadUrl"
      :before-upload="handleBeforeUpload"
      :on-success="handleUploadSuccess"
      :on-error="handleUploadError"
      name="file"
      :show-file-list="false"
      :headers="headers"
      class="editor-img-uploader"
      v-if="type == 'url'"
    >
      <i ref="uploadRef" class="editor-img-uploader"></i>
    </el-upload>
  </div>
  <div class="editor">
    <quill-editor
      ref="quillEditorRef"
      v-model:content="content"
      contentType="html"
      @textChange="textChange"
      :options="options"
      :style="styles"
    />
    <p style="position: ;"> {{ wordCount }} / 500</p>
  </div>
</template>

<script setup>
import { QuillEditor } from "@vueup/vue-quill";
import "@vueup/vue-quill/dist/vue-quill.snow.css";
import { getToken } from "@/utils/auth";

const { proxy } = getCurrentInstance();

const quillEditorRef = ref();
let wordCount = ref(0)
const uploadUrl = ref(import.meta.env.VITE_APP_BASE_API + "/common/upload"); // 上传的图片服务器地址
const headers = ref({
  Authorization: "Bearer " + getToken()
});
function htmlToString(html) {
    var doc = new DOMParser().parseFromString(html, 'text/html');
    return doc.body.textContent || "";
}
const props = defineProps({
  /* 编辑器的内容 */
  modelValue: {
    type: String,
  },
  /* 高度 */
  height: {
    type: Number,
    default: null,
  },
  /* 最小高度 */
  minHeight: {
    type: Number,
    default: null,
  },
  /* 只读 */
  readOnly: {
    type: Boolean,
    default: false,
  },
  /* 上传文件大小限制(MB) */
  fileSize: {
    type: Number,
    default: 5,
  },
  /* 类型（base64格式、url格式） */
  type: {
    type: String,
    default: "url",
  }
});

const options = ref({
  theme: "snow",
  bounds: document.body,
  debug: "warn",
  modules: {
    // 工具栏配置
    toolbar: [
      ["bold", "italic", "underline", "strike"],      // 加粗 斜体 下划线 删除线
      ["blockquote", "code-block"],                   // 引用  代码块
      [{ list: "ordered" }, { list: "bullet" }],      // 有序、无序列表
      [{ indent: "-1" }, { indent: "+1" }],           // 缩进
      [{ size: ["small", false, "large", "huge"] }],  // 字体大小
      [{ header: [1, 2, 3, 4, 5, 6, false] }],        // 标题
      [{ color: [] }, { background: [] }],            // 字体颜色、字体背景颜色
      [{ align: [] }],                                // 对齐方式
      ["clean"],                                      // 清除文本格式
      // ["link", "image", "video"]                      // 链接、图片、视频
    ],
  },
  placeholder: props.readOnly ? '' : "请输入内容",
  readOnly: props.readOnly
});

const styles = computed(() => {
  let style = {};
  if (props.minHeight) {
    style.minHeight = `${props.minHeight}px`;
  }
  if (props.height) {
    style.height = `${props.height}px`;
  }
  return style;
});

const content = ref("");
watch(() => props.modelValue, (v) => {
  if (v !== content.value) {
    content.value = v === undefined ? "" : v;
  }
}, { immediate: true });

// 如果设置了上传地址则自定义图片上传事件
onMounted(() => {
  if (props.type == 'url') {
    let quill = quillEditorRef.value.getQuill();
    let toolbar = quill.getModule("toolbar");
    toolbar.addHandler("image", (value) => {
      if (value) {
        proxy.$refs.uploadRef.click();
      } else {
        quill.format("image", false);
      }
    });
  }
});

// 上传前校检格式和大小
function handleBeforeUpload(file) {
  const type = ["image/jpeg", "image/jpg", "image/png", "image/svg"];
  const isJPG = type.includes(file.type);
  //检验文件格式
  if (!isJPG) {
    proxy.$modal.msgError(`图片格式错误!`);
    return false;
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }
  return true;
}

// 上传成功处理
function handleUploadSuccess(res, file) {
  // 如果上传成功
  if (res.code == 200) {
    // 获取富文本实例
    let quill = toRaw(quillEditorRef.value).getQuill();
    // 获取光标位置
    let length = quill.selection.savedRange.index;
    // 插入图片，res.url为服务器返回的图片链接地址
    quill.insertEmbed(length, "image", import.meta.env.VITE_APP_BASE_API + res.fileName);
    // 调整光标到最后
    quill.setSelection(length + 1);
  } else {
    proxy.$modal.msgError("图片插入失败");
  }
}

// 上传失败处理
function handleUploadError() {
  proxy.$modal.msgError("图片插入失败");
}
let isInputBlocked = false;
const textChange = async () => {
  if (isInputBlocked) return;
  const editor = quillEditorRef.value.getQuill();; // 获取Quill编辑器实例
  const text = editor.getText(); // 获取纯文本内容
  const wordCount2 = text.length - 1; // 计算字数（不包括空格）
  if (wordCount2 > 500) {
    // 如果超出字数限制，阻止进一步输入
    isInputBlocked = true;

    // 在下一个tick解除阻止，以便用户可以继续编辑（但不超过限制）
    await nextTick();
    editor.deleteText(500, wordCount2 - 500);
    isInputBlocked = false;
  }
  wordCount.value = wordCount2 >= 500 ? 500 : wordCount2
  proxy.$emit('update:modelValue',wordCount2 == 0 ? '' : content)
}
</script>

<style>
.editor{
  position: relative;
  width: 880px;
}
.editor >p{
  position: absolute;
  bottom: 0;
  right: 20px;
}
.editor .ql-editor{
  min-height: 192px;
}
.editor-img-uploader {
  display: none;
}
.editor, .ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode="link"]::before {
  content: "请输入链接地址:";
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: "保存";
  padding-right: 0px;
}
.ql-snow .ql-tooltip[data-mode="video"]::before {
  content: "请输入视频地址:";
}
.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: "14px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
  content: "10px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
  content: "18px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
  content: "32px";
}
.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: "文本";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
  content: "标题1";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
  content: "标题2";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
  content: "标题3";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
  content: "标题4";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
  content: "标题5";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
  content: "标题6";
}
.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: "标准字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
  content: "衬线字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
  content: "等宽字体";
}
</style>
