audio_player.py

import os, asyncio, pygame
import edge_tts 

class AudioPlayer:
    def __init__(self, output_dir="audio_exercises"):
        self.output_dir = output_dir
        self.playlist = []
        self.current_idx = 0
        os.makedirs(self.output_dir, exist_ok=True)
        # Standard Pygame mixer init works fine for this RENEWAL
        pygame.mixer.init()

    # Instant feedback announcements
    def play_announcement(self, text):
            path = os.path.join(self.output_dir, "temp_announcement.mp3")
            
            # 1. Ensure Pygame releases the previous temp file
            if pygame.mixer.music.get_busy():
                pygame.mixer.music.stop()
            
            try:
                # Forces unloading of current track
                pygame.mixer.music.unload() 
            except AttributeError:
                # Fallback for old Pygame versions
                pass

            async def _generate():
                communicate = edge_tts.Communicate(text, "de-DE-KillianNeural", rate="+0%")
                await communicate.save(path)
                
            asyncio.run(_generate())
            
            # 2. Play immediately
            pygame.mixer.music.load(path)
            pygame.mixer.music.play()

    # Adds solution track to playlist
    def generate_and_add_tts(self, text, filename):
        # Use existing length to create unique ordered tracks
        safe_filename = f"{len(self.playlist)}_{filename}"
        path = os.path.join(self.output_dir, f"{safe_filename}.mp3")
        
        async def _generate():
            communicate = edge_tts.Communicate(text, "de-DE-KillianNeural", rate="+0%")
            await communicate.save(path)
            
        asyncio.run(_generate())
        # Append to end of playlist
        self.playlist.append(path)
        return path

    # Media Control Navigation (used when PENDING_IMAGES is empty)
    def execute_command(self, cmd):
        if not self.playlist: return "Keine Playlist"
        
        if cmd == 'next' and self.current_idx < len(self.playlist) - 1:
            self.current_idx += 1
        elif cmd == 'prev' and self.current_idx > 0:
            self.current_idx -= 1
            
        if cmd in ['next', 'prev', 'play']:
            print(f"🔊 Loading Track {self.current_idx + 1}: {self.playlist[self.current_idx]}")
            pygame.mixer.music.load(self.playlist[self.current_idx])
            pygame.mixer.music.play()
        elif cmd == 'pause':
            if pygame.mixer.music.get_busy(): pygame.mixer.music.pause()
            else: pygame.mixer.music.unpause()
            
        return f"Track: {self.current_idx + 1} von {len(self.playlist)}"