import { Http } from '@angular/http';
import { PacksService } from '../resources/packs';
import { LocaleService } from '../common/i18n';
import { TdDataTableService, TdDataTableSortingOrder, ITdDataTableSortChangeEvent, ITdDataTableColumn } from '@covalent/core';
import { IPageChangeEvent } from '@covalent/core';
import { Component, Input, AfterViewInit } from '@angular/core';
import { TdMediaService } from '@covalent/core';

@Component({
  selector: 'error-checker',
  template: `
    <div *ngIf="formField?.touched && formField.invalid" layout="column">
      <span *ngFor="let err of getFieldErrors()" align="end">{{err}}</span>
    </div>`
})
export class ErrorCheckerComponent {

  @Input() formField: any;
  @Input() fieldName: string;

  constructor(private $L: LocaleService) {
  }
  
  getFieldErrors() : string[] {
    if (this.formField.valid) {
      return []
    } else {
      return (<string[]>Object.keys(this.formField.errors)).map((err:string) => this.getErrorMsg(err));
    }
  }

  private updateFieldErrors() {
  }

  private getErrorMsg(err: string) : string{
    switch(err) { 
      case 'required': { 
        return this.fieldName + ' '+ this.$L.get('is required');
      } 
      case 'number': { 
        return this.fieldName + ' '+ this.$L.get('should be a number');
      } 
      default: { 
        return this.fieldName + ' '+ this.$L.get('unknown error') + ' ' + err;
      } 
    } 
  }

  log(obj: any) {
    console.log(obj)
  }
  
}