<template>
    <i-select
        class='dropdown-list-dynamic'
        :transfer="true"
        v-model="currentVal"
        :disabled="disabled"
        :clearable="true"
        :filterable="filterable"
        @on-open-change="onClick"
        :placeholder="placeholder?placeholder:$t('components.dropDownListDynamic.placeholder')">
        <i-option v-for="(item, index) in items" :key="index" :class="item.class" :value="item.value">{{item.text}}</i-option>
    </i-select>
</template>

<script lang="ts">
import { Vue, Component, Watch, Prop, Model } from 'vue-property-decorator';
import CodeListService from "@/codelist/codelist-service";

@Component({
})
export default class DropDownListDynamic extends Vue {
    /**
     * 代码表服务对象
     *
     * @type {CodeListService}
     * @memberof DropDownListDynamic
     */  
    public codeListService:CodeListService = new CodeListService();

    /**
     * 额外参数
     *
     * @type {*}
     * @memberof DropDownListDynamic
     */
    public otherParam:any;

    /**
     * 查询参数
     * @type {*}
     * @memberof DropDownListDynamic
     */
    public queryParam:any;

    /**
     * 当前选中值
     * @type {any}
     * @memberof DropDownListDynamic
     */
    @Model('change') readonly itemValue!: any;

    /**
     * 代码表标识
     *
     * @type {string}
     * @memberof DropDownListDynamic
     */
    @Prop() public tag?: string;

    /**
     * 代码表类型
     *
     * @type {string}
     * @memberof DropDownListDynamic
     */
    @Prop() public codelistType?: string;

    /**
     * 传入表单数据
     *
     * @type {*}
     * @memberof DropDownListDynamic
     */
    @Prop() public data?: any;

  /**
     * 监听表单数据
     *
     * @memberof DropDownListDynamic
     */    
    @Watch('data',{ deep: true })
    onDataChange(newVal: any, val: any){
        if(newVal){
            
        }
    }

    /**
     * 局部上下文导航参数
     *
     * @type {*}
     * @memberof DropDownList
     */
    @Prop() public localContext!:any;
    
    /**
     * 局部导航参数
     *
     * @type {*}
     * @memberof DropDownList
     */
    @Prop() public localParam!:any;

    /**
     * 是否禁用
     * @type {any}
     * @memberof DropDownListDynamic
     * 
     */
    @Prop() public disabled?: any;

    /**
     * 是否支持过滤
     * @type {boolean}
     * @memberof DropDownListDynamic
     */
    public filterable: boolean = true;

    /**
     * 下拉选提示内容
     * @type {string}
     * @memberof DropDownListDynamic
     */
    @Prop() public placeholder?: string;

    /**
     * 属性类型
     * @type {string}
     * @memberof DropDownList
     */
    @Prop() public valueType?: string;

    /**
     * 计算属性(当前值)
     * @type {any}
     * @memberof DropDownListDynamic
     */
    set currentVal(val: any) {
        const type: string = this.$util.typeOf(val);
        val = Object.is(type, 'null') || Object.is(type, 'undefined') ? undefined : val;
        this.$emit('change', val);
    }

    /**
     * 获取值对象
     *
     * @memberof DropDownListDynamic
     */
    get currentVal() {
        return this.itemValue;
    }

    /**
     * 代码表
     *
     * @type {any[]}
     * @memberof DropDownListDynamic
     */
    public items: any[] = [];

    /**
     * 视图上下文
     *
     * @type {*}
     * @memberof AppAutocomplete
     */
    @Prop() public context!: any;

    /**
     * 视图参数
     *
     * @type {*}
     * @memberof AppFormDRUIPart
     */
    @Prop() public viewparams!: any;

    /**
     * 公共参数处理
     *
     * @param {*} arg
     * @returns
     * @memberof DropDownListDynamic
     */
    public handlePublicParams(arg: any) {
        // 合并表单参数
        arg.param = this.viewparams ? JSON.parse(JSON.stringify(this.viewparams)) : {};
        arg.context = this.context ? JSON.parse(JSON.stringify(this.context)) : {};
        // 附加参数处理
        if (this.localContext && Object.keys(this.localContext).length >0) {
          let _context = this.$util.computedNavData(this.data,arg.context,arg.param,this.localContext);
            Object.assign(arg.context,_context);
        }
        if (this.localParam && Object.keys(this.localParam).length >0) {
          let _param = this.$util.computedNavData(this.data,arg.context,arg.param,this.localParam);
            Object.assign(arg.param,_param);
        }
    }

    /**
     * vue  生命周期
     *
     * @memberof DropDownListDynamic
     */
    public created() {
      if(this.tag && Object.is(this.codelistType,"STATIC")){
          const codelist = this.$store.getters.getCodeList(this.tag);
          if (codelist) {
              let items: Array<any> = [...JSON.parse(JSON.stringify(codelist.items))];
              this.formatCodeList(items);
          } else {
              console.log(`----${this.tag}----代码表不存在`);
          }
      }else if(this.tag && Object.is(this.codelistType,"DYNAMIC")){
          // 公共参数处理
          let data: any = {};
          this.handlePublicParams(data);
          // 参数处理
          let _context = data.context;
          let _param = data.param;
          this.codeListService.getItems(this.tag,_context,_param).then((res:any) => {
                let items: Array<any> = [...res];
                this.formatCodeList(items);
          }).catch((error:any) => {
              console.log(`----${this.tag}----代码表不存在`);
          });
      }
    }
    
    /**
     * 下拉点击事件
     *
     * @param {*} $event
     * @memberof DropDownListDynamic
     */
    public onClick($event:any){
        if($event){
            if(this.tag && Object.is(this.codelistType,"DYNAMIC")){
                // 公共参数处理
                let data: any = {};
                this.handlePublicParams(data);
                // 参数处理
                let _context = data.context;
                let _param = data.param;
                this.codeListService.getItems(this.tag,_context,_param).then((res:any) => {
                    let items: Array<any> = [...res];
                    this.formatCodeList(items);
                }).catch((error:any) => {
                    console.log(`----${this.tag}----代码表不存在`);
                });
            }
        }
    }
    /**
     * 代码表类型和属性匹配
     * 
     * @param {*} items
     * @memberof DropDownList
     */
    public formatCodeList(items: Array<any>){
        let matching: boolean = true;
        this.items = [];
        try{
            if(this.valueType){
                items.forEach((item: any)=>{
                    const type = this.$util.typeOf(item.value);
                    if(type != this.valueType){
                        matching = false;
                        if(type == 'number'){
                            item.value = item.value.toString();
                        }else{
                            if(item.value.indexOf('.') == -1){
                                item.value = parseInt(item.value);
                            }else{
                                item.value = parseFloat(item.value);
                            }
                        }
                    }
                    this.items.push(item);
                });
                if(!matching){
                    console.warn(`代码表 ${ this.tag } 值类型和属性类型不匹配，已自动强制转换，请修正代码表值类型和属性类型匹配`);
                }
            }else{
                this.items = items;
            }
        }catch(error){
            console.warn('代码表值类型和属性类型不匹配，自动强制转换异常，请修正代码表值类型和属性类型匹配');
        }
    }
}
</script>

<style lang='less'>
@import './dropdown-list-dynamic.less';
</style>