import { Component, EventEmitter, HostBinding, OnDestroy, OnInit, Output } from '@angular/core';
import { Location, LocationStrategy } from '@angular/common';
import { NbThemeService } from '@nebular/theme';
import { map, takeUntil } from 'rxjs/operators';
import { Subject } from 'rxjs';

@Component({
  selector: 'ngx-room-selector',
  templateUrl: './room-selector.component.html',
  styleUrls: ['./room-selector.component.scss'],
})
export class RoomSelectorComponent implements OnInit, OnDestroy {

  private destroy$ = new Subject<void>();
  private hideGrid: boolean;

  @Output() select: EventEmitter<number> = new EventEmitter();

  selectedRoom = null;
  sortedRooms = [];
  viewBox = '-20 -20 618.88 407.99';
  isIE = !!(navigator.userAgent.match(/Trident/)
            || navigator.userAgent.match(/MSIE/)
            || navigator.userAgent.match(/Edge/));
  isFirefox = navigator.userAgent.toLowerCase().indexOf('firefox') >= 0;
  roomSvg = {
    borders: [{
      d: 'M186.21,130.05H216.37V160H186.21Z',
    }],
    stokedAreas: [
      { d: 'M562.71,225V354h-290V319H418.37a6.09,6.09,0,0,0,6.09-6.09V225Z' },
      { d: 'M8.09,130V347.91A6.09,6.09,0,0,0,14.18,354h54V130Z' },
      { d: 'M216.37,49.82H358.8V92.5H216.37Z' },
    ],
    rooms: [
      {
        id: '0',
        name: { text: 'Kitchen', x: 142, y: 240.8 },
        area: { d: 'M68.18,130V359.9A6.09,6.09,0,0,0,74.27,366h136a6.09,6.09,0,0,0,6.09-6.09V160H186.21V130Z' },
        border: { d: 'M96,130H68.18V359.9A6.09,6.09,0,0,0,74.27,366h136a6.09,6.09,0,0,0,6.09-6.09V225 M152.71,' +
          '130H186.21V160H218.5' },
      },
      {
        id: '1',
        name: { text: 'Bedroom', x: 109, y: 66 },
        area: { d: 'M152.71,130h63.66V8.09A6.09,6.09,0,0,0,210.27,2H8.09A6.09,6.09,0,0,0,2,8.09V123.95A6.09,' +
          '6.09,0,0,0,8.09,130H96Z' },
        border: { d: 'M152.71,130h63.66V8.09A6.09,6.09,0,0,0,210.27,2H8.09A6.09,6.09,0,0,0,2,8.09V123.95A6.09' +
          ',6.09,0,0,0,8.09,130H96' },
      },
      {
        id: '2',
        name: { text: 'Living Room', x: 468, y: 134 },
        area: { d: 'M358.8,160V49.82a6.09,6.09,0,0,1,6.09-6.09H570.78a6.09,6.09,0,0,1,6.09,6.09V218.9a6.09' +
          ',6.09,0,0,1-6.09,6.09h-212Z' },
        border: { d: 'M358.8,160V49.82a6.09,6.09,0,0,1,6.09-6.09H570.78a6.09,6.09,0,0,1,6.09,6.09V218.9a6.09' +
          ',6.09,0,0,1-6.09,6.09h-212' },
      },
      {
        id: '3',
        name: { text: 'Hallway', x: 320, y: 273 },
        area: { d: 'M216.37,354V92.5H358.8V225H424.39V319H272.71V354Z' },
        border: { d: 'M216.37,225V356 M216.21,162V92.5H358.8V160 M358.8,225H424.39V312.91a6.09,' +
          '6.09,0,0,1,-6.09,6.09H272.71V356' },
      },
    ],
  };

  @HostBinding('style.background')
  get background(): 'none' | null {
    return this.hideGrid ? 'none' : null;
  }

  constructor(
    private location: Location,
    private locationStrategy: LocationStrategy,
    private themeService: NbThemeService,
  ) {
    this.selectRoom('2');
  }

  ngOnInit() {
    this.hideGrid = this.themeService.currentTheme === 'corporate';

    this.themeService.onThemeChange()
      .pipe(
        map(({ name }) => name === 'corporate'),
        takeUntil(this.destroy$),
      )
      .subscribe((hideGrid: boolean) => this.hideGrid = hideGrid);
  }

  ngOnDestroy() {
    this.destroy$.next();
    this.destroy$.complete();
  }

  private sortRooms() {
    this.sortedRooms = this.roomSvg.rooms.slice(0).sort((a, b) => {
      if (a.id === this.selectedRoom) {
        return 1;
      }
      if (b.id === this.selectedRoom) {
        return -1;
      }
      return 0;
    });
  }

  selectRoom(roomNumber) {
    this.select.emit(roomNumber);
    this.selectedRoom = roomNumber;
    this.sortRooms();
  }

  getUrlPath(id: string) {
    const baseHref = this.locationStrategy.getBaseHref().replace(/\/$/, '');
    const path = this.location.path().replace(/\/$/, '');

    return `url(${baseHref}${path}${id})`;
  }
}
