<template>
  <el-dialog :title="textMap[dialogStatus]" :visible.sync="dialogFormVisible" append-to-body>
    <el-form ref="dataForm" :rules="rules" :model="form" label-position="right" label-width="130px">
      <el-row :gutter="20" v-if="dialogStatus === 'detail'">
        <el-col :span="20" :offset="2">
          <el-form-item label="编号" prop="code">
            <el-input v-model.trim="form.code" :disabled="isEditMode" type="text" placeholder="必填" />
          </el-form-item>
        </el-col>
      </el-row>
      <el-row :gutter="20">
        <el-col :span="20" :offset="2">
          <el-form-item label="姓名">
            <el-input v-model.trim="form.name" :disabled="isEditMode" type="text" placeholder="姓名" />
          </el-form-item>
        </el-col>
      </el-row>
      <el-row :gutter="20">
        <el-col :span="20" :offset="2">
          <el-form-item label="人脸照片" prop="picture">
            <div style="display: flex;">
              <img :src="form.picture ? `${form.picture}`: defaultPhoto" width="150" height="150" @error="errorImg" style=" margin-top: 10px"/>
              <el-upload
                ref="upload"
                style="margin: 40px"
                v-if="dialogStatus !== 'detail'"
                :before-upload="handleBeforeUpload"
                :http-request="uploadFile"
                :show-file-list="false"
                class="avatar-uploader"
                action="string"
                accept=".jpg,.png">
                <el-button size="small" icon="el-icon-folder-add">浏 览</el-button>
                <div slot="tip" class="el-upload__tip" style="font-size: 15px">只能上传jpg、png文件，且不超过200kb</div>
              </el-upload>
            </div>
          </el-form-item>
        </el-col>
      </el-row>
      <el-row :gutter="20">
        <el-col :span="20" :offset="2" >
          <el-form-item label="加入黑名单原因" prop="blackReason">
            <el-select v-model="form.blackReason" size="small" :disabled="isEditMode" placeholder="必填"  clearable>
              <el-option
                v-for="item in reasonList"
                :key="item.value"
                :label="item.name"
                :value="item.value"/>
            </el-select>
          </el-form-item>
        </el-col>
      </el-row>
      <el-row :gutter="20">
        <el-col :span="20" :offset="2">
          <el-form-item label="备注">
            <el-input v-model.trim="form.remarks" :disabled="isEditMode" :rows="3" type="textarea" placeholder="备注" />
          </el-form-item>
        </el-col>
      </el-row>
    </el-form>
    <div slot="footer" class="dialog-footer" v-if="!isEditMode">
      <el-button :loading="btnLoading" type="primary" @click="saveData">
        保存
      </el-button>
      <el-button @click="cancel">
        取消
      </el-button>
    </div>
  </el-dialog>
</template>

<script>
import {  addBlack, updateBlack } from '@/api/black'
import { getDictByCode } from '@/api/system/dict'

export default {
  name: 'EditBlack',
  data() {
    return {
      defaultPhoto: require('@/assets/global_images/photo.png'),
      errorImg: require('@/assets/global_images/photo_error.png'),
      dialogFormVisible: false, // 对话框是否显示
      dialogStatus: '', // 对话框类型：create,update
      isEditMode: true,
      form: {
        id: '',
        code: '',
        name: '',
        picture:'',
        blackReason:'',
        remarks:''
      }, // 表单
      textMap: {
        update: '编辑黑名单',
        create: '新增黑名单',
        detail:  '黑名单详情'
      }, // 表头显示标题
      btnLoading: false, // 保存按钮的加载中状态
      reasonList:[],
      rules: {
        code: [{ required: true, message: '编号不能为空', trigger: ['blur', 'change'] }],
        blackReason: [{ required: true, message: '加入黑名单原因不能为空', trigger: ['blur', 'change'] }],
        picture : [{ required: true, message: '图片不能为空', trigger: ['blur', 'change'] }]
      } // 前端校验规则
    }
  },
  computed: {
  },
  created() {
    this.fetchOptions()
  },
  methods: {
    // 上传前判断文件格式及大小
    handleBeforeUpload(file) {
      const isJPG = (file.type === 'image/jpeg') || (file.type === 'image/png')
      let res = true
      const isLt2M = file.size / 1024 < 200
      if (!isJPG) {
        this.$message.error('上传图片只能是 JPG 或 PNG 格式!')
        res = false
      }
      if (!isLt2M) {
        this.$message.error('上传图片大小不能超过 200KB!')
        res = false
      }
      return res
    },
    uploadFile(file) {
      console.log('uploadFile:' + file.file.name)
      // 转base64
      this.getBase64(file.file).then(resBase64 => {
        this.form.picture = 'data:image/png;base64,' + resBase64.split(',')[1] // 直接拿到base64信息
        console.log(this.form.picture)
      })
    },
    getBase64(file) {
      return new Promise((resolve, reject) => {
        const reader = new FileReader()
        let fileResult = ''
        reader.readAsDataURL(file)
        // 开始转
        reader.onload = function() {
          fileResult = reader.result
        }
        // 转 失败
        reader.onerror = function(error) {
          reject(error)
        }
        // 转 结束  咱就 resolve 出去
        reader.onloadend = function() {
          resolve(fileResult)
        }
      })
    },
    fetchOptions() {
      getDictByCode('blackReason').then(response => {
        if (response.code === 200) {
          this.reasonList = response.data
        }
      })
    },
    // 初始化对话框
    initDialog: function(dialogStatus, row = null) {
      this.dialogStatus = dialogStatus
      this.dialogFormVisible = true
      this.btnLoading = false
      if (dialogStatus === 'create') { // 如果是新增，清除验证
        this.resetForm()
        this.isEditMode = false
        this.$nextTick(() => {
          this.$refs['dataForm'].clearValidate()
        })
      } else if (dialogStatus === 'update') { // 如果是修改，将row中数据填写到输入框中
        this.form = {
          id: row.id,
          name: row.name,
          picture:row.picture,
          blackReason:row.blackReason,
          remarks:row.remarks
        }
        this.isEditMode = false
      }else if (dialogStatus === 'detail') {
        this.form = {
          id: row.id,
          name: row.name,
          picture:row.picture,
          blackReason:row.blackReason,
          remarks:row.remarks
        }
        this.isEditMode = true
      }
    },
    // 重置表单
    resetForm() {
      this.form = {
        id: '',
        code: '',
        name: '',
        picture:'',
        blackReason:'',
        remarks:''
      }
    },
    // 保存数据
    saveData: function() {
      console.log(this.form)
      if (this.dialogStatus === 'update') {
        this.updateData()
      } else if (this.dialogStatus === 'create') {
        this.createData()
      }
    },
    // 新增数据
    createData: function() {
      this.$refs['dataForm'].validate((valid) => {
        console.log(this.form)
        if (valid) {
          this.btnLoading = true
          addBlack(this.form).then(response => {
            if (response.code === 200) {
              this.$confirm('新增成功，是否继续新增?', '提示', {
                confirmButtonText: '是',
                cancelButtonText: '否',
                type: 'info'
              }).then(() => { // 选是
                this.resetForm()
                this.btnLoading = false
                this.$nextTick(() => {
                  this.$refs['dataForm'].clearValidate()
                })
              }).catch(() => { // 选否,关闭窗口，并刷新页面
                this.$emit('watchChild')
                this.dialogFormVisible = false
              })
            }
          }).catch(_ => { // 异常情况，loading置为false
            this.btnLoading = false
          })
        }
      })
    },
    // 修改数据
    updateData: function() {
      this.$refs['dataForm'].validate((valid) => {
        if (valid) {
          this.btnLoading = true
          updateBlack(this.form).then(response => {
            if (response.code === 200) {
              this.$message.success('修改成功')
              this.$refs['dataForm'].clearValidate()
              this.$emit('watchChild')
              this.dialogFormVisible = false
            }
          }).catch(_ => { // 异常情况，loading置为false
            this.btnLoading = false
          })
        }
      })
    },
    cancel: function() {
      this.dialogFormVisible = false
      // this.$emit('watchChild')
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss" scoped>

  .el-dialog{
    width:700px
  }
  .el-select{
    width: 100%;
  }
</style>