import {
  AfterViewInit, Component, ElementRef, EventEmitter, Input, OnDestroy, Output, ViewChild
} from '@angular/core';
import { TextElement } from 'common/models/elements/text/text';
import { ValueChangeElement } from 'common/models/elements/element';
import { ElementComponent } from '../../directives/element-component.directive';
import { ImageFullscreenDialog, ImageFullscreenDirective } from 'common/directives/image-fullscreen.directive';

@Component({
  selector: 'aspect-text',
  template: `
    <div [style.width.%]="100"
         [style.height.%]="100">
      <aspect-text-marking-bar
        *ngIf="elementModel.highlightableYellow ||
            elementModel.highlightableTurquoise ||
            elementModel.highlightableOrange"
        [elementModel]="elementModel"
        (markingDataChanged)="selectedColor=$event.colorName; markingDataChanged.emit($event)">
      </aspect-text-marking-bar>
      <div #textContainerRef class="text-container"
           [class.orange-selection]="selectedColor === 'orange'"
           [class.yellow-selection]="selectedColor === 'yellow'"
           [class.turquoise-selection]="selectedColor === 'turquoise'"
           [class.delete-selection]="selectedColor === 'delete'"
           [style.background-color]="elementModel.styling.backgroundColor"
           [style.color]="elementModel.styling.fontColor"
           [style.font-size.px]="elementModel.styling.fontSize"
           [style.line-height.%]="elementModel.styling.lineHeight"
           [style.font-weight]="elementModel.styling.bold ? 'bold' : ''"
           [style.font-style]="elementModel.styling.italic ? 'italic' : ''"
           [style.text-decoration]="elementModel.styling.underline ? 'underline' : ''"
           [style.column-count]="elementModel.columnCount"
           tooltipEventTooltip
           (click)="openFullscreenImage($event)"
           [innerHTML]="savedText || elementModel.text | safeResourceHTML"
           (contextmenu)="$event.preventDefault()"
           (pointerdown)="startTextSelection($event)">
      </div>
      <ng-container imageFullscreen></ng-container>
    </div>
  `,
  styles: [
    '::ng-deep .yellow-selection ::selection {background-color: #f9f871}',
    '::ng-deep .turquoise-selection ::selection {background-color: #9de8eb}',
    '::ng-deep .orange-selection ::selection {background-color: #ffa06a}',
    '::ng-deep .delete-selection ::selection {background-color: lightgrey}',
    '::ng-deep .text-container p strong {letter-spacing: 0.02em; font-weight: 750;}',
    '::ng-deep .text-container p:empty::after {content: \'\'; display: inline-block;}', // render empty p
    '::ng-deep .text-container h1 {font-weight: bold; font-size: 20px;}',
    '::ng-deep .text-container h2 {font-weight: bold; font-size: 18px;}',
    '::ng-deep .text-container h3 {font-weight: bold; font-size: 16px;}',
    '::ng-deep .text-container h4 {font-weight: normal; font-size: 16px;}',
    ':host ::ng-deep mark {color: inherit}',
    '::ng-deep sup {line-height: 0;}',
    '::ng-deep sub {line-height: 0;}'
  ]
})
export class TextComponent extends ElementComponent implements AfterViewInit, OnDestroy {
  @Input() elementModel!: TextElement;
  @Input() savedText!: string;
  @Output() elementValueChanged = new EventEmitter<ValueChangeElement>();
  @Output() textSelectionStart = new EventEmitter<PointerEvent>();
  @Output() markingDataChanged = new EventEmitter<{
    active: boolean,
    mode: 'mark' | 'delete',
    color: string,
    colorName: string | undefined
  }>();

  @ViewChild(ImageFullscreenDirective) imageFullScreenDirective!: ImageFullscreenDirective;

  selectedColor!: string | undefined;

  static textComponents: { [id: string]: TextComponent } = {};

  @ViewChild('textContainerRef') textContainerRef!: ElementRef;

  startTextSelection(event: PointerEvent): void {
    if (this.elementModel.highlightableYellow ||
      this.elementModel.highlightableTurquoise ||
      this.elementModel.highlightableOrange) {
      this.textSelectionStart.emit(event);
    }
  }

  ngAfterViewInit() {
    TextComponent.textComponents[this.elementModel.id] = this;
  }

  ngOnDestroy(): void {
    delete TextComponent.textComponents[this.elementModel.id];
  }

  openFullscreenImage(event: MouseEvent) {
    const targetElement = event.target as HTMLImageElement;
    if (targetElement.nodeName === 'IMG') {
      this.imageFullScreenDirective.openFullScreenDialog(targetElement.src, targetElement.alt);
    }
  }
}