# core/music_generator.py
"""
Music generator stub. You can plug in a TTS or music model (Coqui, MusicLM, etc.)
Returns dict: {"music_path": ..., "duration": ..., "model": ...}
"""
import asyncio
from pathlib import Path
import time
from concurrent.futures import ThreadPoolExecutor
from config import OUTPUT_DIR
from typing import Dict



OUTPUT_DIR = Path(OUTPUT_DIR)
OUTPUT_DIR.mkdir(parents=True, exist_ok=True)
_executor = ThreadPoolExecutor(max_workers=1)

def _sync_generate_music(idea: str, out_path: Path, bpm=100):
    """
    Replace with your real music/TTS generator.
    For now this creates a placeholder file and metadata.
    """
    t0 = time.time()
    out_path.parent.mkdir(parents=True, exist_ok=True)
    with open(out_path, "wb") as f:
        f.write(b"")  # replace with real audio bytes
    meta = {"prompt": idea, "bpm": bpm, "time_taken": time.time() - t0}
    return {"music_path": str(out_path), "duration": 3.0, "meta": meta}

async def generate_music(idea: str) -> Dict:
    loop = asyncio.get_event_loop()
    out_path = OUTPUT_DIR / f"music_{int(time.time()*1000)}.wav"
    result = await loop.run_in_executor(_executor, _sync_generate_music, idea, out_path)
    return result