import os
import json
import time
from config import TEMP_DIR

def meta_path(file_id):
    return os.path.join(TEMP_DIR, f"{file_id}.json")

def video_path(file_id):
    return os.path.join(TEMP_DIR, f"{file_id}.mp4")

def save_meta(file_id, filename, expires_at):
    """Simpan metadata file ke disk."""
    with open(meta_path(file_id), "w") as f:
        json.dump({"filename": filename, "expires_at": expires_at}, f)

def load_meta(file_id):
    """Baca metadata file dari disk. Return None jika tidak ada."""
    p = meta_path(file_id)
    if not os.path.exists(p):
        return None
    try:
        with open(p) as f:
            return json.load(f)
    except Exception:
        return None

def cleanup_expired():
    """Hapus file temp (video + meta) yang sudah expired."""
    now = time.time()
    for fname in os.listdir(TEMP_DIR):
        if not fname.endswith(".json"):
            continue
        fid = fname[:-5]
        meta = load_meta(fid)
        if meta and meta["expires_at"] < now:
            try:
                vp = video_path(fid)
                if os.path.exists(vp):
                    os.remove(vp)
                os.remove(meta_path(fid))
            except Exception:
                pass