import os
from datetime import timedelta


class Config:
    BASE_DIR = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))

    # Where session folders and generated images live
    DATA_DIR = os.path.join(BASE_DIR, "data")
    SESSIONS_DIR = os.path.join(DATA_DIR, "sessions")

    # Ensure directories exist at import time
    os.makedirs(SESSIONS_DIR, exist_ok=True)

    # Security & limits
    MAX_CONTENT_LENGTH = 25 * 1024 * 1024  # 25 MB upload cap

    # Cross-origin
    CORS_ORIGINS = "*"  # tighten in prod

    # Housekeeping
    SESSION_TTL = timedelta(hours=6)  # delete session dirs older than this

    # Flask
    JSON_SORT_KEYS = False
    PROPAGATE_EXCEPTIONS = False