<template>
    <div class="upload-container">
        <el-button :style="{background:color,borderColor:color}" icon="el-icon-upload" size="mini" type="primary" @click=" dialogVisible=true">
            上传图片
        </el-button>
        <el-dialog :visible.sync="dialogVisible">
            <el-upload
                :headers="{'Authorization': token}"
                :multiple="true"
                :file-list="fileList"
                :show-file-list="true"
                :on-remove="handleRemove"
                :on-success="handleSuccess"
                :before-upload="beforeUpload"
                :action="uploadUrl"
                class="editor-slide-upload"
                list-type="picture-card">
                <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="handleSubmit">确 定</el-button>
        </el-dialog>
    </div>
</template>

<script>
// import { getToken } from 'api/qiniu'

export default {
    name: 'EditorSlideUpload',
    props: {
        color: {
            type: String,
            default: '#1890ff'
        },
        uploadUrl: {
            type: String,
            required: true,
            default: ''
        },
        token: {
            type: String,
            required: false,
            default: ''
        }
    },
    data () {
        return {
            dialogVisible: false,
            listObj: {},
            fileList: []
        }
    },
    methods: {
        checkAllSuccess () {
            return Object.keys(this.listObj).every(item => this.listObj[item].hasSuccess)
        },
        handleSubmit () {
            const arr = Object.keys(this.listObj).map(v => this.listObj[v])
            if (!this.checkAllSuccess()) {
                this.$message('请等待所有图片上传成功 或 出现了网络问题，请刷新页面重新上传！')
                return
            }
            this.$emit('successCBK', arr)
            this.listObj = {}
            this.fileList = []
            this.dialogVisible = false
        },
        handleSuccess (response, file) {
            if (response.code === 600) {
                const uid = file.uid
                const objKeyArr = Object.keys(this.listObj)
                for (let i = 0, len = objKeyArr.length; i < len; i++) {
                    if (this.listObj[objKeyArr[i]].uid === uid) {
                        this.listObj[objKeyArr[i]].url = response.data
                        this.listObj[objKeyArr[i]].hasSuccess = true
                        return
                    }
                }
            }
        },
        handleRemove (file) {
            const uid = file.uid
            const objKeyArr = Object.keys(this.listObj)
            for (let i = 0, len = objKeyArr.length; i < len; i++) {
                if (this.listObj[objKeyArr[i]].uid === uid) {
                    delete this.listObj[objKeyArr[i]]
                    return
                }
            }
        },
        beforeUpload (file) {
            const _self = this
            const _URL = window.URL || window.webkitURL
            const fileName = file.uid
            this.listObj[fileName] = {}
            return new Promise((resolve, reject) => {
                const img = new Image()
                img.src = _URL.createObjectURL(file)
                img.onload = function () {
                    _self.listObj[fileName] = { hasSuccess: false, uid: file.uid, width: this.width, height: this.height }
                }
                resolve(true)
            })
        }
    }
}
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
.editor-slide-upload {
  margin-bottom: 20px;
  /deep/ .el-upload--picture-card {
    width: 100%;
  }
}
</style>
