import os
from urllib.parse import quote_plus

basedir = os.path.abspath(os.path.dirname(__file__))


def env_str(name, default=None):
    value = os.environ.get(name)
    return default if value is None else value


def env_int(name, default):
    value = os.environ.get(name)
    if value is None or value == "":
        return default
    try:
        return int(value)
    except (TypeError, ValueError):
        return default


def env_bool(name, default=False):
    value = os.environ.get(name)
    if value is None:
        return default
    return str(value).strip().lower() in ("1", "true", "yes", "on")


class Config:
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = "Lax"

    SECRET_KEY = env_str("SECRET_KEY", "D8pceNZ8q%YR7^7F&9wAC2")

    APP_PORT = env_int("APP_PORT", 8000)

    DB_ENGINE = env_str("DB_ENGINE", "sqlite").lower()

    if DB_ENGINE == "sqlite":
        SQLALCHEMY_DATABASE_URI = (
            f"sqlite:///{os.path.join(basedir, 'db', 'shopping.db')}"
        )

    elif DB_ENGINE == "pgsql":
        db_user = quote_plus(env_str("DB_USER", "user"))
        db_password = quote_plus(env_str("DB_PASSWORD", "pass"))
        db_host = env_str("DB_HOST", "pgsql")
        db_port = env_str("DB_PORT", "5432")
        db_name = quote_plus(env_str("DB_NAME", "myapp"))

        SQLALCHEMY_DATABASE_URI = (
            f"postgresql://{db_user}:{db_password}@{db_host}:{db_port}/{db_name}"
        )

    elif DB_ENGINE == "mysql":
        db_user = quote_plus(env_str("DB_USER", "user"))
        db_password = quote_plus(env_str("DB_PASSWORD", "pass"))
        db_host = env_str("DB_HOST", "mysql")
        db_port = env_str("DB_PORT", "3306")
        db_name = quote_plus(env_str("DB_NAME", "myapp"))

        SQLALCHEMY_DATABASE_URI = (
            f"mysql+pymysql://{db_user}:{db_password}@{db_host}:{db_port}/{db_name}"
        )

    else:
        raise ValueError("Nieobsługiwany typ bazy danych.")

    SQLALCHEMY_TRACK_MODIFICATIONS = False

    SYSTEM_PASSWORD = env_str("SYSTEM_PASSWORD", "admin")
    DEFAULT_ADMIN_USERNAME = env_str("DEFAULT_ADMIN_USERNAME", "admin")
    DEFAULT_ADMIN_PASSWORD = env_str("DEFAULT_ADMIN_PASSWORD", "admin123")
    UPLOAD_FOLDER = env_str("UPLOAD_FOLDER", "uploads")
    AUTHORIZED_COOKIE_VALUE = env_str("AUTHORIZED_COOKIE_VALUE", "cookievalue")
    BCRYPT_PEPPER = env_str("BCRYPT_PEPPER", "sekretnyKluczBcrypt")
    SESSION_COOKIE_SECURE = env_bool("SESSION_COOKIE_SECURE", False)
    HEALTHCHECK_TOKEN = env_str("HEALTHCHECK_TOKEN", "alamapsaikota1234")

    AUTH_COOKIE_MAX_AGE = env_int("AUTH_COOKIE_MAX_AGE", 86400)
    SESSION_TIMEOUT_MINUTES = env_int("SESSION_TIMEOUT_MINUTES", 10080)

    ENABLE_HSTS = env_bool("ENABLE_HSTS", False)
    ENABLE_XFO = env_bool("ENABLE_XFO", False)
    ENABLE_XCTO = env_bool("ENABLE_XCTO", False)
    ENABLE_CSP = env_bool("ENABLE_CSP", False)
    ENABLE_PP = env_bool("ENABLE_PP", False)

    REFERRER_POLICY = env_str("REFERRER_POLICY") or None

    DEBUG_MODE = env_bool("DEBUG_MODE", True)
    DISABLE_ROBOTS = env_bool("DISABLE_ROBOTS", False)

    CURRENCY_CODE = env_str("CURRENCY_CODE", "PLN").strip().upper() or "PLN"

    JS_CACHE_CONTROL = env_str("JS_CACHE_CONTROL", "no-cache")
    CSS_CACHE_CONTROL = env_str("CSS_CACHE_CONTROL", "no-cache")
    LIB_JS_CACHE_CONTROL = env_str("LIB_JS_CACHE_CONTROL", "max-age=604800")
    LIB_CSS_CACHE_CONTROL = env_str("LIB_CSS_CACHE_CONTROL", "max-age=604800")
    UPLOADS_CACHE_CONTROL = env_str(
        "UPLOADS_CACHE_CONTROL",
        "public, max-age=2592000, immutable",
    )

    DEFAULT_CATEGORIES = [
        c.strip()
        for c in env_str(
            "DEFAULT_CATEGORIES",
            "Spożywcze,Budowlane,Zabawki,Chemia,Inne,Elektronika,Odzież i obuwie,Jedzenie poza domem,"
            "Artykuły biurowe,Kosmetyki i higiena,Motoryzacja,Ogród i rośliny,"
            "Zwierzęta,Sprzęt sportowy,Książki i prasa,Narzędzia i majsterkowanie,"
            "RTV / AGD,Apteka i suplementy,Artykuły dekoracyjne,Gry i hobby,Usługi,Pieczywo,Różne,Chiny,Dom,Leki,Odzież,Samochód,Dzieci",
        ).split(",")
        if c.strip()
    ]