///
/// Copyright © 2016-2023 The Thingsboard Authors
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///

import { ChangeDetectorRef, Component, forwardRef, Input, OnDestroy, Renderer2, ViewContainerRef } from '@angular/core';
import { PageComponent } from '@shared/components/page.component';
import { Store } from '@ngrx/store';
import { AppState } from '@core/core.state';
import { ControlValueAccessor, FormControl, NG_VALUE_ACCESSOR, } from '@angular/forms';
import { moveItemInArray } from '@angular/cdk/drag-drop';
import { DndDropEvent } from 'ngx-drag-drop';
import { isUndefined } from '@core/utils';
import { coerceBoolean } from '@shared/decorators/coercion';
import { ImageLinkType } from '@home/components/image/gallery-image-input.component';
import { TbPopoverService } from '@shared/components/popover.service';
import { MatButton } from '@angular/material/button';
import { ImageGalleryComponent } from '@home/components/image/image-gallery.component';

@Component({
  selector: 'tb-multiple-gallery-image-input',
  templateUrl: './multiple-gallery-image-input.component.html',
  styleUrls: ['./multiple-gallery-image-input.component.scss'],
  providers: [
    {
      provide: NG_VALUE_ACCESSOR,
      useExisting: forwardRef(() => MultipleGalleryImageInputComponent),
      multi: true
    }
  ]
})
export class MultipleGalleryImageInputComponent extends PageComponent implements OnDestroy, ControlValueAccessor {

  @Input()
  label: string;

  @Input()
  @coerceBoolean()
  required = false;

  @Input()
  disabled: boolean;

  imageUrls: string[];

  ImageLinkType = ImageLinkType;

  linkType: ImageLinkType = ImageLinkType.none;

  externalLinkControl = new FormControl(null);

  dragIndex: number;

  private propagateChange = null;

  constructor(protected store: Store<AppState>,
              private cd: ChangeDetectorRef,
              private renderer: Renderer2,
              private viewContainerRef: ViewContainerRef,
              private popoverService: TbPopoverService) {
    super(store);
  }

  ngOnDestroy() {
  }

  registerOnChange(fn: any): void {
    this.propagateChange = fn;
  }

  registerOnTouched(fn: any): void {
  }

  setDisabledState(isDisabled: boolean): void {
    this.disabled = isDisabled;
  }

  writeValue(value: string[]): void {
    this.reset();
    this.imageUrls = value || [];
  }

  private updateModel() {
    this.cd.markForCheck();
    this.propagateChange(this.imageUrls);
  }

  private reset() {
    this.linkType = ImageLinkType.none;
    this.externalLinkControl.setValue(null, {emitEvent: false});
  }

  clearImage(index: number) {
    this.imageUrls.splice(index, 1);
    this.updateModel();
  }

  setLink($event: Event) {
    if ($event) {
      $event.stopPropagation();
    }
    this.linkType = ImageLinkType.external;
  }

  declineLink($event: Event) {
    if ($event) {
      $event.stopPropagation();
    }
    this.reset();
  }

  applyLink($event: Event) {
    if ($event) {
      $event.stopPropagation();
    }
    this.imageUrls.push(this.externalLinkControl.value);
    this.reset();
    this.updateModel();
  }

  toggleGallery($event: Event, browseGalleryButton: MatButton) {
    if ($event) {
      $event.stopPropagation();
    }
    const trigger = browseGalleryButton._elementRef.nativeElement;
    if (this.popoverService.hasPopover(trigger)) {
      this.popoverService.hidePopover(trigger);
    } else {
      const ctx: any = {
        pageMode: false,
        popoverMode: true,
        mode: 'grid',
        selectionMode: true
      };
      const imageGalleryPopover = this.popoverService.displayPopover(trigger, this.renderer,
        this.viewContainerRef, ImageGalleryComponent, 'top', true, null,
        ctx,
        {},
        {}, {}, true);
      imageGalleryPopover.tbComponentRef.instance.imageSelected.subscribe((image) => {
        imageGalleryPopover.hide();
        this.imageUrls.push(image.link);
        this.updateModel();
      });
    }
  }

  imageDragStart(index: number) {
    setTimeout(() => {
      this.dragIndex = index;
      this.cd.markForCheck();
    });
  }

  imageDragEnd() {
    this.dragIndex = -1;
    this.cd.markForCheck();
  }

  imageDrop(event: DndDropEvent) {
    let index = event.index;
    if (isUndefined(index)) {
      index = this.imageUrls.length;
    }
    moveItemInArray(this.imageUrls, this.dragIndex, index);
    this.dragIndex = -1;
    this.updateModel();
  }
}