// src/app/components/cued-title/cued-title.component.ts
import { Component, input, computed, signal, effect } from '@angular/core';
import { DatePipe } from '@angular/common';
import { TitleCasePipe } from '@angular/common';
import { TitleSheet, TitleSheetListStatus } from '../../../models/title-sheet.model';

@Component({
  selector: 'app-cued-title',
  standalone: true,
  imports: [TitleCasePipe],
  templateUrl: './cued-title.component.html',
  styleUrl: './cued-title.component.scss'
})
export class CuedTitleComponent {

  // === INPUT SIGNALS (ANGULAR 19) ===
  unrealStatus = input<TitleSheetListStatus | null>(null);

  // === INTERNAL SIGNALS ===
  private playStartTime = signal<Date | null>(null);
  private elapsedSeconds = signal<number>(0);
  private intervalId : any = signal<number | null>(null);

  // Keep track of the last attempted title (even if it failed)
  private lastAttemptedTitle = signal<TitleSheet | null>(null);

  // === COMPUTED SIGNALS ===
  statusClass = computed(() => {
    const status = this.unrealStatus();
    if (!status) return 'stopped';
    return status.isPlaying ? 'playing' : 'stopped';
  });

  hasCurrentTitle = computed(() => {
    const status = this.unrealStatus();
    const lastAttempted = this.lastAttemptedTitle();

    // Show title if:
    // 1. There's a current title, OR
    // 2. There's an error/stopped state but we have a last attempted title
    return status?.currentTitleSheet !== null ||
           (lastAttempted !== null && (status?.errorMessage));
  });

  // Get the title to display (current or last attempted)
  displayedTitle = computed(() => {
    const status = this.unrealStatus();
    // Prefer current title, fallback to last attempted title
    return status?.currentTitleSheet || this.lastAttemptedTitle();
  });

  isPlaying = computed(() => {
    const status = this.unrealStatus();
    return status?.isPlaying || false;
  });

  // Format du timer : MM:SS
  formattedTimer = computed(() => {
    const seconds = this.elapsedSeconds();
    const minutes = Math.floor(seconds / 60);
    const remainingSeconds = seconds % 60;
    return `${minutes.toString().padStart(2, '0')}:${remainingSeconds.toString().padStart(2, '0')}`;
  });

  // Couleur du timer selon les règles
  timerColorClass = computed(() => {
    if (!this.isPlaying()) return 'timer-stopped';

    const seconds = this.elapsedSeconds();
    if (seconds < 10) return 'timer-white';
    return 'timer-red';
  });

  constructor() {
    // Track the last attempted title for error display
    effect(() => {
      const status = this.unrealStatus();

      if (status?.currentTitleSheet) {
        // Update last attempted title when a new title is set
        this.lastAttemptedTitle.set(status.currentTitleSheet);
      } else if (!status?.isPlaying && !status?.errorMessage) {
        // Clear last attempted title when voluntarily stopped (no error)
        this.lastAttemptedTitle.set(null);
      }
    });

    // Effect pour gérer le démarrage/arrêt du timer
    effect(() => {
      const isPlaying = this.isPlaying();

      if (isPlaying) {
        this.startTimer();
      } else {
        this.stopTimer();
        this.resetTimer();
      }
    });
  }

  ngOnDestroy(): void {
    this.stopTimer();
  }

  private startTimer(): void {
    this.stopTimer();

    this.playStartTime.set(new Date());
    this.elapsedSeconds.set(0);

    this.intervalId = setInterval(() => {
      const startTime = this.playStartTime();
      if (startTime) {
        const now = new Date();
        const elapsed = Math.floor((now.getTime() - startTime.getTime()) / 1000);
        this.elapsedSeconds.set(elapsed);
      }
    }, 1000);
  }

  private stopTimer(): void {
    if (this.intervalId) {
      clearInterval(this.intervalId);
      this.intervalId = null;
    }
  }

  private resetTimer(): void {
    this.playStartTime.set(null);
    this.elapsedSeconds.set(0);
  }
}