<template>
    <el-upload
        class="avatar-uploader"
        action="https://run.mocky.io/v3/9d059bf9-4660-45f2-925d-ce80ad6c4d15"
        :show-file-list="false"
        :on-success="handleAvatarSuccess"
        :before-upload="beforeAvatarUpload"
    >
        <img v-if="imageUrl" :src="imageUrl" class="avatar" />
        <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
    </el-upload>
</template>

<script lang="ts" setup>
import { ref } from 'vue'
import { ElMessage } from 'element-plus'
import { Plus } from '@element-plus/icons-vue'

import type { UploadProps } from 'element-plus'

const imageUrl = ref('')

const handleAvatarSuccess: UploadProps['onSuccess'] = (response, uploadFile) => {
    imageUrl.value = URL.createObjectURL(uploadFile.raw!)
}

const beforeAvatarUpload: UploadProps['beforeUpload'] = rawFile => {
    if (rawFile.type !== 'image/jpeg') {
        ElMessage.error('Avatar picture must be JPG format!')
        return false
    } else if (rawFile.size / 1024 / 1024 > 2) {
        ElMessage.error('Avatar picture size can not exceed 2MB!')
        return false
    }
    return true
}
</script>

<style scoped>
.avatar-uploader .avatar {
    width: 178px;
    height: 178px;
    display: block;
}
</style>

<style>
.avatar-uploader .el-upload {
    border: 1px dashed var(--el-border-color);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: var(--el-transition-duration-fast);
}

.avatar-uploader .el-upload:hover {
    border-color: var(--el-color-primary);
}

.el-icon.avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    text-align: center;
}
</style>
