import { Component, inject, OnInit } from '@angular/core';
import { HttpService } from '../http.service';
import { Vorstellung } from '@infinimotion/model-frontend';
import { Performance } from '../model/performance.model';
import { MovieGroup } from '../model/movie-group.model';
import { LoadingService } from '../loading.service';
import { catchError, of, tap } from 'rxjs';

@Component({
  selector: 'app-schedule',
  standalone: false,
  templateUrl: './schedule.component.html',
  styleUrl: './schedule.component.css'
})
export class ScheduleComponent implements OnInit {
  dates: { label: string; date: Date; performances: MovieGroup[] }[] = [];
  performaces: Vorstellung[] = [];

  movieSearchResult: string = '';

  private readonly bookableDays: number = 14;

  private http = inject(HttpService);
  private loading = inject(LoadingService)

  constructor() {
    this.generateDates(this.bookableDays);
  }

  ngOnInit() {
    this.loadPerformances(this.bookableDays);
  }

  hasSearchResults(dateIndex: number): boolean {
    if (!this.movieSearchResult) return true;

    return this.dates[dateIndex].performances.some(group =>
      group.movie.title.toLowerCase().includes(this.movieSearchResult.toLowerCase())
    );
  }

  generateDates(bookableDays: number) {
    const today = new Date();
    for (let i = 0; i < bookableDays; i++) {
      const date = new Date(today);
      date.setDate(today.getDate() + i);

      let label = '';
      if (i === 0) {
        label = 'Heute';
      } else if (i === 1) {
        label = 'Morgen';
      } else {
        label = date.toLocaleDateString('de-DE', { weekday: 'short' }) + '. ' + date.toLocaleDateString('de-DE', { day: '2-digit', month: '2-digit'});
      }

      this.dates.push({ label, date, performances: []});
    }
  }

  loadPerformances(bookableDays: number) {
    this.loading.show();
    const filter = this.generateDateFilter(bookableDays);
    this.http.getPerformacesByFilter(filter).pipe(
      tap(performaces => {
        this.performaces = performaces;
        this.assignPerformancesToDates();
        this.loading.hide();
      }),
      catchError(err => {
        this.loading.showError(err);
        console.error('Fehler beim Laden der Vorstellungen', err);
        return of([]);
      })
    ).subscribe();
  }

private generateDateFilter(bookableDays: number): string[] {
  const startDate = new Date();
  const endDate = new Date();
  endDate.setDate(startDate.getDate() + bookableDays - 1);

  const startStr = startDate.toISOString().split('T')[0] + 'T00:00:00';
  const endStr = endDate.toISOString().split('T')[0] + 'T23:59:59';

  return [
    `ge;start;date;${startStr}`,
    `le;start;date;${endStr}`,
  ];
}


  assignPerformancesToDates() {

    // Gruppieren nach Datum
    const groupedByDate: { [key: string]: Vorstellung[] } = {};
    for (const vorstellung of this.performaces) {
      const dateKey = new Date(vorstellung.start).toDateString();
      if (!groupedByDate[dateKey]) {
        groupedByDate[dateKey] = [];
      }
      groupedByDate[dateKey].push(vorstellung);
    }

    // Gruppieren nach Film
    for (const dateInfo of this.dates) {
      const dateKey = dateInfo.date.toDateString();
      const dailyPerformances: Vorstellung[] = groupedByDate[dateKey] || [];

      const movieMap = new Map<number, { movie: typeof dailyPerformances[0]['movie']; performances: Performance[] }>();

      for (const perf of dailyPerformances) {
        const movieId = perf.movie.id;
        if (!movieMap.has(movieId)) {
          movieMap.set(movieId, { movie: perf.movie, performances: [] });
        }

        const performance: Performance = {
          id: perf.id,
          hall: perf.hall.name,
          start: new Date(perf.start),
          // utilisation: 0 // TODO: perf.utilisation einrichten
        };
        movieMap.get(movieId)!.performances.push(performance);
      }

      // MovieGroups erstellen
      dateInfo.performances = Array.from(movieMap.values()).map((entry) => ({
        movie: entry.movie,
        performances: entry.performances.sort((a, b) => a.start.getTime() - b.start.getTime()),
      })) as MovieGroup[];
    }
  }

  getMovieCount(index: number): number {
    return this.dates[index].performances.length;
  }
}