import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable, Subject, BehaviorSubject, of } from 'rxjs';
import { Matches, MatchState } from '@interfaces/matches';

@Injectable({ providedIn: 'root' })
export class MatchesService {
  private matches: Matches[] = [
    {
      id: 1,
      refereeID: 10,
      player1ID: 1,
      score1: 15,
      player2ID: 2,
      score2: 13,
      country: 'France',
      city: 'Paris',
      weapon: 'Fleuret',
      date: new Date('2025-06-10T14:00:00'),
      state: MatchState.OVER,
    },
    {
      id: 2,
      refereeID: 11,
      player1ID: 3,
      score1: 5,
      player2ID: 4,
      score2: 7,
      country: 'France',
      city: 'Lyon',
      weapon: 'Épée',
      date: new Date('2025-06-15T10:00:00'),
      state: MatchState.ONGOING,
    },
    {
      id: 3,
      refereeID: 12,
      player1ID: 5,
      score1: 0,
      player2ID: 6,
      score2: 0,
      country: 'Belgique',
      city: 'Bruxelles',
      weapon: 'Sabre',
      date: new Date('2025-06-20T16:30:00'),
      state: MatchState.NOT_STARTED,
    },
  ];
  private socket?: WebSocket;
  private apiUrl = 'http://localhost:8080';
  private matchUpdates$ = new Subject<Matches[]>();
  private allMatches: Matches[] = [];
  private nextMatchId = Math.max(...this.matches.map((m) => m.id)) + 1;

  constructor(private http: HttpClient) {
    this.sendCurrentMatches();
  }

  public sendCurrentMatches(): void {
    if (!this.matches || this.matches.length === 0) {
      console.warn('[HTTP] ⚠️ Aucun match à envoyer.');
      return;
    }

    const headers = {
      headers: {
        'Content-Type': 'application/json',
      },
    };

    this.matches.forEach((match) => {
      this.http
        .post(
          this.apiUrl + '/matches/create-match',
          JSON.stringify(match),
          headers
        )
        .subscribe({
          next: (response) => {
            console.log('[HTTP] ✅ Match envoyé avec succès :', response);
          },
          error: (error) => {
            console.error(
              '[HTTP] ❌ Erreur lors de l’envoi d’un match :',
              error
            );
          },
        });
    });
  }

  private connectToMatchUpdatesWebSocket(): void {
    const wsUrl = 'http://localhost:8080/ws';
    this.socket = new WebSocket(wsUrl);

    this.socket.onopen = () => {
      console.log('[WebSocket] ✅ Connecté à', wsUrl);
    };

    this.socket.onmessage = (event) => {
      try {
        const data = JSON.parse(event.data) as Matches[];
        console.log('[WebSocket] 📥 Données reçues :', data);
        this.matchUpdates$.next(data);
      } catch (e) {
        console.error('[WebSocket] ❌ Erreur de parsing JSON', e);
      }
    };

    this.socket.onerror = (err) => {
      console.error('[WebSocket] ❌ Erreur :', err);
    };

    this.socket.onclose = () => {
      console.warn('[WebSocket] 🔌 Fermeture de la connexion');
    };
  }

  private sendMatchesToWebSocket(): void {
    if (this.socket && this.socket.readyState === WebSocket.OPEN) {
      const dataToSend = JSON.stringify(this.matches);
      this.socket.send(dataToSend);
      console.log('[WebSocket] 📤 Données envoyées :', dataToSend);
    } else {
      console.warn("[WebSocket] ⚠️ Le WebSocket n'est pas encore ouvert.");
    }
  }

  getMatches(): Observable<Matches[]> {
    return this.matchUpdates$.asObservable();
  }

  getMatchById(id: number): Observable<Matches | undefined> {
    const match = this.allMatches.find((m) => m.id === id);
    console.log(`[MatchesService] Match ID ${id} récupéré :`, match);
    return new BehaviorSubject(match).asObservable();
  }

  updateMatch(id: number, updatedData: Partial<Matches>): void {
    const matchIndex = this.allMatches.findIndex((m) => m.id === id);
    if (matchIndex !== -1) {
      const updatedMatch = { ...this.allMatches[matchIndex], ...updatedData };
      this.allMatches[matchIndex] = updatedMatch;
      this.matchUpdates$.next([...this.allMatches]); // émettre un nouveau tableau
      console.log(
        `[MatchesService] Match ${id} mis à jour localement :`,
        updatedMatch
      );
    } else {
      console.warn(`[MatchesService] Match ${id} non trouvé pour mise à jour`);
    }
  }

  ngOnDestroy(): void {
    this.socket?.close();
  }

  create(match: Omit<Matches, 'id'>): Observable<Matches> {
    const newMatch: Matches = {
      ...match,
      id: this.nextMatchId++,
    };

    this.matches.push(newMatch);
    console.log('[MatchesService] Match created:', newMatch);
    return of(newMatch);
  }

  deleteMatch(id: number): Observable<boolean> {
    const index = this.matches.findIndex((m) => m.id === id);

    if (index !== -1) {
      const deletedMatch = this.matches.splice(index, 1)[0];
      console.log(`[MatchesService] Match ${id} supprimé :`, deletedMatch);

      return of(true);
    } else {
      console.warn(`[MatchesService] Match ${id} introuvable pour suppression`);
      return of(false);
    }
  }
}