import os

class Config:
    """Base configuration."""
    SECRET_KEY = os.environ.get('SECRET_KEY', '234234sdfsdfsdfsdf345345')
    SQLALCHEMY_TRACK_MODIFICATIONS = False

class DevelopmentConfig(Config):
    """Development configuration."""
    DEBUG = True
    
    uri = os.environ.get('DATABASE_URL', 'postgres://postgres:59fff56880e1bbb42e753d2a82ac21b6@peterstockings.com:15389/bloodpressure_db')
    if uri and uri.startswith("postgres://"):
        uri = uri.replace("postgres://", "postgresql://", 1)

    SQLALCHEMY_DATABASE_URI = uri

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

    uri = os.environ.get('DATABASE_URL')
    if uri and uri.startswith("postgres://"):
        uri = uri.replace("postgres://", "postgresql://", 1)

    SQLALCHEMY_DATABASE_URI = uri

class TestingConfig(Config):
    """Testing configuration."""
    TESTING = True
    SQLALCHEMY_DATABASE_URI = 'sqlite:///test.db'