import {Component, ViewEncapsulation, ElementRef, EventEmitter, Output, Input, ViewChild} from '@angular/core';

declare var UIkit: any;

@Component({
  selector: 'modal-alert',
  template: `
    <div #element class="uk-modal" uk-modal>
      <div class="uk-modal-dialog uk-modal-body uk-animation-fast uk-margin-medium-bottom uk-text-left"
           [ngClass]="classBody">
        <div [ngClass]="classTitle" class="uk-modal-title" [hidden]=!alertHeader>
          <button class="uk-modal-close-default uk-float-right" (click)='cancel()' uk-close></button>
          <h4 class="modal-title">{{alertTitle}}</h4>
        </div>
        <div class="uk-margin">
          <div [hidden]=!alertMessage>
            {{message}}
          </div>
          <ng-content></ng-content>
        </div>
        <div class="uk-grid uk-flex uk-flex-middle">
          <label *ngIf="choice" class="uk-width-1-2 checkbox">
            <input type="checkbox" [(ngModel)]="select">
            <span class="uk-margin-small-left" style="font-weight: normal;">Don't show this message again</span>
          </label>
          <div [ngClass]="(choice)?'uk-width-1-2':'uk-width-1-1'">
            <div *ngIf="okButtonLeft" class="uk-text-right" [hidden]=!alertFooter>
              <span [hidden]=!okButton>
                <button *ngIf="okDisabled" class="uk-button md-btn disabled uk-button-default ignoreCommunityPanelBackground" disabled>{{okButtonText}}</button>
                <button *ngIf="!okDisabled"
                      class="uk-button md-btn md-btn-primary portal-button ignoreCommunityPanelBackground"
                      (click)="ok()">{{okButtonText}}</button>
              </span>
              <span [hidden]=!cancelButton>
                <button class="uk-button md-btn uk-button-default uk-margin-small-left"
                        (click)="cancel()">{{cancelButtonText}}</button>
              </span>
            </div>
            <div *ngIf="!okButtonLeft" class="uk-text-right" [hidden]=!alertFooter>
               <span [hidden]=!cancelButton>
                  <button class="uk-button md-btn uk-button-default uk-margin-small-right"
                          (click)="cancel()">{{cancelButtonText}}</button>
              </span>
              <span [hidden]=!okButton>
              <button *ngIf="okDisabled" class="uk-button md-btn disabled uk-button-default ignoreCommunityPanelBackground"
                      disabled>{{okButtonText}}</button>
              <button *ngIf="!okDisabled"
                      class="uk-button md-btn md-btn-primary portal-button ignoreCommunityPanelBackground"
                      (click)="ok()">{{okButtonText}}</button>
            </span>
            </div>
          </div>
        </div>
      </div>
    </div>
  `,
  encapsulation: ViewEncapsulation.None,
})
/**
 * API to an open alert window.
 */
export class AlertModal {
  @Input() classTitle: string = "";
  @Input() classBody: string = "";
  /**
   * Caption for the title.
   */
  public alertTitle: string;
  /**
   * Describes if the alert contains Ok Button.
   * The default Ok button will close the alert and emit the callback.
   * Defaults to true.
   */
  public okButton: boolean = true;
  /**
   * Caption for the OK button.
   * Default: Ok
   */
  public okButtonText: string = 'Ok';
  /**
   * Describes if the alert contains cancel Button.
   * The default Cancelbutton will close the alert.
   * Defaults to true.
   */
  public cancelButton: boolean = true;
  /**
   * Caption for the Cancel button.
   * Default: Cancel
   */
  public cancelButtonText: string = 'Cancel';
  /**
   * if the alertMessage is true it will show the contentString inside alert body.
   */
  public alertMessage: boolean = true;
  /**
   * Some message/content can be set in message which will be shown in alert body.
   */
  public message: string;
  /**
   * if the value is true alert footer will be visible or else it will be hidden.
   */
  public alertFooter: boolean = true;
  /**
   * shows alert header if the value is true.
   */
  public alertHeader: boolean = true;
  /**
   *  if the value is true ok button align on the left, else on the right
   */
  public okButtonLeft: boolean = true;

  /**
   *  if the value is true ok button is disabled
   */
  @Input()
  public okDisabled: boolean = false;

  /**
   *  If the value is true, a checkbox option will be appeared on the right side of footer
   */
  @Input()
  public choice: boolean = false;

  /**
   * if the value is true then on ok clicked, modal will stay open.
   */
  public stayOpen: boolean = false;

  /**
   *  Value will be emitted if @choice is true
   */
  public select: boolean = false;
  /**
   * Emitted when a ok button was clicked
   * or when Ok method is called.
   */
  @Output() public alertOutput: EventEmitter<any> = new EventEmitter();

  @ViewChild('element') element: ElementRef;

  constructor() {
  }

  /**
   * Opens a alert window creating backdrop.
   */
  open() {
    UIkit.modal(this.element.nativeElement).show();
  }

  /**
   *  ok method closes the modal and emits modalOutput.
   */
  ok() {
    if (!this.stayOpen) {
      this.cancel();
    }
    if (!this.choice) {
      this.alertOutput.emit(true);
    } else {
      this.alertOutput.emit({
        value: true,
        choice: this.select
      });
    }
  }

  /**
   *  cancel method closes the modal.
   */
  cancel() {
    UIkit.modal(this.element.nativeElement).hide();
  }
}