import os


def _load_dotenv():
    """Load KEY=value lines from a .env beside this file into the environment,
    with NO variable expansion. Werkzeug password hashes contain '$', which
    shell-style interpolation corrupts. Vars already set (e.g. by systemd) win."""
    path = os.path.join(os.path.dirname(os.path.abspath(__file__)), ".env")
    if not os.path.exists(path):
        return
    with open(path, encoding="utf-8") as fh:
        for raw in fh:
            line = raw.strip()
            if not line or line.startswith("#") or "=" not in line:
                continue
            key, val = line.split("=", 1)
            key, val = key.strip(), val.strip()
            if len(val) >= 2 and val[0] == val[-1] and val[0] in ("'", '"'):
                val = val[1:-1]
            os.environ.setdefault(key, val)


_load_dotenv()


class Config:
    # Build the SQLAlchemy URI from discrete env vars, or accept a full DATABASE_URL.
    DB_USER = os.environ.get("DB_USER", "jqc_features")
    DB_PASSWORD = os.environ.get("DB_PASSWORD", "")
    DB_HOST = os.environ.get("DB_HOST", "127.0.0.1")
    DB_PORT = os.environ.get("DB_PORT", "3306")
    DB_NAME = os.environ.get("DB_NAME", "jqc_features")

    SQLALCHEMY_DATABASE_URI = os.environ.get(
        "DATABASE_URL",
        f"mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}?charset=utf8mb4",
    )
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    SQLALCHEMY_ENGINE_OPTIONS = {"pool_pre_ping": True, "pool_recycle": 280}

    # Public contact button target shown in the closing CTA.
    DEMO_CONTACT_URL = os.environ.get("DEMO_CONTACT_URL", "mailto:info@ltservicesinc.com")

    # --- Admin / session ---
    SECRET_KEY = os.environ.get("SECRET_KEY", "dev-only-insecure-change-me")

    ADMIN_USERNAME = os.environ.get("ADMIN_USERNAME", "admin")
    ADMIN_PASSWORD_HASH = os.environ.get("ADMIN_PASSWORD_HASH", "")

    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = "Lax"
    SESSION_COOKIE_SECURE = os.environ.get("SESSION_COOKIE_SECURE", "1") == "1"