declare type ValueType = string | number | undefined;


export class InputNumberModel {
  viewValue: ValueType = undefined;
  modelValue: ValueType = undefined;
  focus: boolean = false;
  digits: number = 2;
  _fmt:string|undefined = undefined;
  emit: any;
  ref: any;

  get numberFormat() {
    // if(this._fmt==undefined){
      this._fmt = this.createNumberFmt(this.digits);
    // }
    return this._fmt;
  }

  createNumberFmt(num:number){
     let numFmt = "###,###,###,###,###,###";
     if(num>0){
        numFmt += ".";
        for (let i = 0; i < num; i++) {
          numFmt += "0";
        }
     }
     return numFmt;
  }


  bind(digits: number,ref:any,emit:any) {
    this.digits = digits==undefined?2:digits;
    this.ref = ref;
    this.emit = emit;
  }

  setViewValue(value: ValueType) {
    this.viewValue = value;
    if(value!=undefined && (value+"").endsWith(".")) return;
    this.modelValue = this.viewToModel(value);
    this.triggerVm();
  }

  viewToModel(vv: ValueType):ValueType {
     if(vv===undefined || vv==="" || vv==="-") return;
     if(!this.focus){
        this.viewValue = Number.format(Number.parse(vv),this.numberFormat);
     }
     return Number.parse(vv);
  }

  setModelValue(value: ValueType) {
     this.modelValue = value;
     this.viewValue = this.modelToView(value);
  }

  modelToView(mv: ValueType): ValueType {
    if(mv===undefined || mv===null || mv=== '') return '';
    if(this.focus){
       return mv+'';
    }
    return Number.format(Number.parse(mv),this.numberFormat);
  }

  isEmpty() {
    return this.modelValue === undefined || this.viewValue === null || this.viewValue === '';
  }

  triggerVm(){
    this.emit('update:value',this.modelValue);
    this.emit('change',this.modelValue);
  }
}