<template>
  <div class="component-upload-image">
    <el-upload 
      :action="uploadUrl" 
      list-type="picture-card" 
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload" 
      :limit="limit" 
      :on-error="handleUploadError" 
      :on-exceed="handleExceed"
      ref="imageUpload" 
      :before-remove="handleDelete" 
      :data="params" 
      name="file" 
      :show-file-list="true" 
      :headers="headers"
      v-model:file-list="fileList" 
      :on-preview="handlePictureCardPreview" 
      :class="{ hide: fileList.length >= limit }">
        <el-icon class="avatar-uploader-icon">
          <plus />
        </el-icon>
      </el-upload>
    <!-- 上傳提示 -->
    <div class="el-upload__tip" v-if="showTip">
      請上傳
      <template v-if="fileSize">
        大小不超過 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式為 <b style="color: #f56c6c">{{ fileType.join("、") }}</b>
      </template>
      的文件
    </div>
    <template v-if="showTipButton">
      <el-button link type="primary" @click="showDiagram = !showDiagram" icon="InfoFilled">查看示意圖</el-button>
    </template>
    <el-image class="tip-img" :src="diagram" fit="contain" :preview-src-list="[diagram]" v-if="showDiagram" :preview-teleported="true"></el-image>
    <el-dialog v-model="dialogVisible" title="預(yù)覽" width="800px" append-to-body>
      <img :src="dialogImageUrl" style="display: block; max-width: 100%; margin: 0 auto" />
    </el-dialog>
  </div>
</template>
<script setup name="CertificateUpload">
import { getToken } from "@/utils/auth";
const props = defineProps({
  // 是否顯示示意圖
  showTipButton: {
    type: Boolean,
    default: true
  },
  // 示意圖
  diagram: { 
    type: String,
    default: '',
  },
  //識別接口
  action:{
    type: String,
    default: '',
  },
  modelValue: [String, Object, Array],
  limit: {
    type: Number,
    default: 1,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 5,
  },
  // 文件類型, 例如['png', 'jpg', 'jpeg']
  fileType: {
    type: Array,
    default: () => ['png','jpg','jpeg','bmp'],
  },
  // 是否顯示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
});
const { proxy } = getCurrentInstance();
const emit = defineEmits(['update:modelValue','certificateInfo']);
const showDiagram = ref(false)
const dialogImageUrl = ref("");
const dialogVisible = ref(false);
const baseUrl = import.meta.env.VITE_APP_BASE_API;
// const uploadUrl = ref(baseUrl + props.action); // 上傳的圖片服務(wù)器地址
const headers = ref({ Authorization: "Bearer " + getToken() , repeatSubmit : false});
const uploadUrl = computed( //上傳的圖片服務(wù)器地址
  () => baseUrl + props.action
);
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
);
const params = ref({})
const fileList = computed({
  get: () => {
    if(props.modelValue){
      // 首先將值轉(zhuǎn)為數(shù)組
      if(!Array.isArray(props.modelValue)){
        proxy.$modal.msgError('modelValue 必須是數(shù)組 { url ossId name }[]')
        return []
      }
      return props.modelValue
    }else{
      return []
    }
  },
  set: (newVal) => {}
});
// 上傳前l(fā)oading加載
function handleBeforeUpload(file) {
  try {
    let isImg = false;
    if (props.fileType.length) {
      let fileExtension = "";
      if (file.name.lastIndexOf(".") > -1) {
        fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
      }
      isImg = props.fileType.some(type => {
        if (file.type.indexOf(type) > -1) return true;
        if (fileExtension && fileExtension.indexOf(type) > -1) return true;
        return false;
      });
    } else {
      isImg = file.type.indexOf("image") > -1;
    }
    if (!isImg) {
      proxy.$modal.msgError(
        `文件格式不正確, 請上傳${props.fileType.join("/")}圖片格式文件!`
      );
      return false;
    }
    if (props.fileSize) {
      const isLt = file.size / 1024 / 1024 < props.fileSize;
      if (!isLt) {
        proxy.$modal.msgError(`上傳頭像圖片大小不能超過 ${props.fileSize} MB!`);
        return false;
      }
    }
    params.value.name = file.name.replace(/\.[a-zA-Z]+$/g, '') + '_' + new Date().getTime() // 帶上時間戳，避免文件地址重復(fù)被覆蓋
    proxy.$modal.loading("正在上傳圖片，請稍候...");
  } catch (error) {
    proxy.$modal.closeLoading();
    console.log(error)
  }
}
// 文件個數(shù)超出
function handleExceed() {
  proxy.$modal.msgError(`上傳文件數(shù)量不能超過 ${props.limit} 個!`);
}
// 上傳成功回調(diào)
function handleUploadSuccess(res, file, fileList) {
  try {
    if (res.code === 200) {
      // 多張
      // const all = [res.data.file.url, ...fileList.filter(z=>!z.response).map(u=>u.url)].join(',')
      emit("update:modelValue", [{
        url: res.data.oss.url,
        name: res.data.oss.fileName,
        ossId: res.data.oss.ossId
      }])
      emit("certificateInfo",res.data.recognition.data)
      proxy.$modal.closeLoading();
    } else {
      proxy.$modal.closeLoading();
      proxy.$modal.msgError(res.msg);
      proxy.$refs.imageUpload.handleRemove(file);
    }
  } catch (error) {
    proxy.$modal.closeLoading();
    console.log(error)
  }
}
// 刪除圖片
function handleDelete(file) {
  const findex = fileList.value.map(f => f.url).indexOf(file.url);
  if (findex > -1) {
    fileList.value.splice(findex, 1);
    emit("update:modelValue", fileList.value.map(z => z.url).join(','))
    return false;
  }
}
// 上傳失敗
function handleUploadError() {
  proxy.$modal.msgError("上傳圖片失敗");
  proxy.$modal.closeLoading();
}
// 預(yù)覽
function handlePictureCardPreview(file) {
  dialogImageUrl.value = file.url;
  dialogVisible.value = true;
}
</script>
<style scoped lang="scss">
:deep(.hide .el-upload--picture-card) {
  display: none;
}
</style>