from __future__ import annotations

import os
from datetime import timedelta
from pathlib import Path


BASE_DIR = Path(__file__).resolve().parent.parent


class Config:
    SECRET_KEY = os.getenv("SECRET_KEY", "dev-change-me")
    SQLALCHEMY_DATABASE_URI = os.getenv(
        "DATABASE_URL",
        f"sqlite:///{BASE_DIR / 'instance' / 'face_attendance.sqlite3'}",
    )
    SQLALCHEMY_TRACK_MODIFICATIONS = False

    MAX_CONTENT_LENGTH = int(os.getenv("MAX_CONTENT_LENGTH", str(8 * 1024 * 1024)))
    FACE_MATCH_TOLERANCE = float(os.getenv("FACE_MATCH_TOLERANCE", "0.55"))

    PERMANENT_SESSION_LIFETIME = timedelta(hours=12)
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = "Lax"
    REMEMBER_COOKIE_HTTPONLY = True
    REMEMBER_COOKIE_DURATION = timedelta(days=14)

    WTF_CSRF_TIME_LIMIT = None


class DevelopmentConfig(Config):
    DEBUG = True
    SESSION_COOKIE_SECURE = False
    REMEMBER_COOKIE_SECURE = False


class TestingConfig(Config):
    TESTING = True
    WTF_CSRF_ENABLED = False
    SQLALCHEMY_DATABASE_URI = "sqlite:///:memory:"
    SERVER_NAME = "localhost.test"
    SESSION_COOKIE_SECURE = False
    REMEMBER_COOKIE_SECURE = False


class ProductionConfig(Config):
    DEBUG = False
    TESTING = False
    SESSION_COOKIE_SECURE = True
    REMEMBER_COOKIE_SECURE = True


config_by_name = {
    "development": DevelopmentConfig,
    "testing": TestingConfig,
    "production": ProductionConfig,
}