<template>
  <form-item-wrapper :designer="designer" :field="field" :rules="rules" :design-state="designState"
                     :parent-widget="parentWidget" :parent-list="parentList" :index-of-parent-list="indexOfParentList"
                     :sub-form-row-index="subFormRowIndex" :sub-form-col-index="subFormColIndex"
                     :sub-form-row-id="subFormRowId" v-if="">
    <el-select ref="fieldEditor" v-model="fieldModel" v-show="!isReadMode" class="full-width-input"
               :disabled="field.options.disabled"
               :size="field.options.size"
               :clearable="field.options.clearable"
               :filterable="field.options.filterable"
               :allow-create="field.options.allowCreate"
               :default-first-option="allowDefaultFirstOption"
               :automatic-dropdown="field.options.automaticDropdown"
               :multiple="field.options.multiple" :multiple-limit="field.options.multipleLimit"
               :collapse-tags="!field.options.flatCollapseTags"
               :placeholder="getI18nLabel(field.options.placeholder || '请选择')"
               :remote="field.options.remote" :remote-method="remoteQuery"
               @focus="handleFocusCustomEvent" @blur="handleBlurCustomEvent"
               @change="handleChangeEvent"
               :style="'width:'+field.options.widgetWidth+' !important;'"
               :class="{'custom-width':field.options.widgetWidth!=null}">
      <el-option v-for="(item,index) in optionItems" :key="index" :label="getI18nLabel(item[labelField])"
                 :value="item[valueField]" :disabled="item.disabled">
      </el-option>
    </el-select>
    <template v-if="isReadMode">
      <span class="readonly-mode-field">{{optionLabel}}</span>
    </template>
  </form-item-wrapper>
</template>

<script>
import FormItemWrapper from './form-item-wrapper'
import emitter from '../../../../../components/xform/utils/emitter'
import i18n from "../../../../../components/xform/utils/i18n";
import fieldMixin from "../../../../../components/xform/form-designer/form-widget/field-widget/fieldMixin";

export default {
  name: "select-widget",
  componentName: 'FieldWidget',  //必须固定为FieldWidget，用于接收父级组件的broadcast事件
  mixins: [emitter, fieldMixin, i18n],
  props: {
    field: Object,
    parentWidget: Object,
    parentList: Array,
    indexOfParentList: Number,
    designer: Object,

    designState: {
      type: Boolean,
      default: false
    },

    subFormRowIndex: { /* 子表单组件行索引，从0开始计数 */
      type: Number,
      default: -1
    },
    subFormColIndex: { /* 子表单组件列索引，从0开始计数 */
      type: Number,
      default: -1
    },
    subFormRowId: { /* 子表单组件行Id，唯一id且不可变 */
      type: String,
      default: ''
    }
  },
  components: {
    FormItemWrapper,
  },
  inject: ['refList', 'globalOptionData', 'globalModel'],
  data() {
    return {
      oldFieldValue: null, //field组件change之前的值
      fieldModel: null,
      rules: [],
    }
  },
  computed: {
    labelField(){
      return this.getOptionItemLabelKey();
    },
    valueField(){
      return this.getOptionItemValueKey();
    },
    allowDefaultFirstOption() {
      return (!!this.field.options.filterable && !!this.field.options.allowCreate)
    },
    fieldModelLabel() {
      // let fieldModel = this.fieldModel;
      // let optionItems = this.field.options.optionItems;
      // let valueField = this.valueField;
      // let labelField = this.labelField;
      // let optionItem = optionItems.find(item => item[valueField] === fieldModel)
      // return optionItem && optionItem[labelField] ? optionItem[labelField] : null;
      return this.getOptionLabel();
    },
    optionItems() {
      return this.getOptionItems();
    }

  },
  beforeCreate() {
    /* 这里不能访问方法和属性！！ */
    // this.handleBeforeCreatedEvent();
  },

  created() {
    /* 注意：子组件mounted在父组件created之后、父组件mounted之前触发，故子组件mounted需要用到的prop
       需要在父组件created中初始化！！ */
    this.handleCreatedEnterEvent();
    this.initFieldModel()
    this.registerToRefList()
    this.initEventHandler()
    this.buildFieldRules()

    this.handleOnCreated()
    this.initOptionItemsHandle()
  },

  mounted() {
    this.handleOnMounted()
  },

  beforeDestroy() {
    this.unregisterFromRefList()
  },

  methods: {}
}
</script>

<style lang="scss" scoped>
@import "~@/styles/global.scss"; //* form-item-wrapper已引入，还需要重复引入吗？ *//

.full-width-input {
  width: 100% !important;
}

</style>
