import os
from dotenv import load_dotenv

load_dotenv()


class Config:
    """Base configuration."""
    SECRET_KEY = os.environ.get("SECRET_KEY", "default-secret-key")
    SQLALCHEMY_DATABASE_URI = os.environ.get(
        "DATABASE_URL", "sqlite:///app.db"
    )
    SQLALCHEMY_TRACK_MODIFICATIONS = False


class DevelopmentConfig(Config):
    """Development configuration."""
    DEBUG = True


class TestingConfig(Config):
    """Testing configuration."""
    TESTING = True
    SQLALCHEMY_DATABASE_URI = "sqlite:///:memory:"
    WTF_CSRFS_ENABLED = False


class ProductionConfig(Config):
    """Production configuration."""
    DEBUG = False
    TESTING = False


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