import os
from dotenv import load_dotenv

load_dotenv()

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY', 'dev-secret-change-me')
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    WTF_CSRF_ENABLED = True

    DATABASE_URL = os.environ.get('DATABASE_URL', '')
    SQLALCHEMY_DATABASE_URI = DATABASE_URL

    GROQ_API_KEY = os.environ.get('GROQ_API_KEY', '')
    GROQ_MODEL = os.environ.get('GROQ_MODEL', 'llama-3.3-70b-versatile')

    UPLOAD_FOLDER = os.environ.get('UPLOAD_FOLDER', '/home/pfm/app/uploads')
    MAX_CONTENT_LENGTH = int(os.environ.get('MAX_CONTENT_LENGTH', 10485760))

    APP_CURRENCY = os.environ.get('APP_CURRENCY', 'USD')
    APP_CURRENCY_SYMBOL = os.environ.get('APP_CURRENCY_SYMBOL', '$')
    APP_TIMEZONE = os.environ.get('APP_TIMEZONE', 'Asia/Ho_Chi_Minh')

    ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'pdf'}

    # Teller
    TELLER_APP_ID = os.environ.get('TELLER_APP_ID', '')
    TELLER_ENV = os.environ.get('TELLER_ENV', 'development')
    TELLER_CERT_PATH = os.environ.get('TELLER_CERT_PATH', '/home/pfm/teller/certificate.pem')
    TELLER_KEY_PATH = os.environ.get('TELLER_KEY_PATH', '/home/pfm/teller/private_key.pem')
    TELLER_WEBHOOK_SECRET = os.environ.get('TELLER_WEBHOOK_SECRET', '')

    # Budget alert emails (optional — all four must be set to enable)
    SMTP_HOST     = os.environ.get('SMTP_HOST', '')
    SMTP_PORT     = int(os.environ.get('SMTP_PORT', 587))
    SMTP_USER     = os.environ.get('SMTP_USER', '')
    SMTP_PASSWORD = os.environ.get('SMTP_PASSWORD', '')
    ALERT_EMAIL   = os.environ.get('ALERT_EMAIL', '')   # recipient address
    APP_URL       = os.environ.get('APP_URL', 'https://pfm.ngodanguyen.tech')

    # Application log file (rotating, shared by all app.* loggers)
    LOG_FILE_PATH = os.environ.get(
        'LOG_FILE_PATH',
        os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'logs', 'app.log')
    )
    LOG_MAX_BYTES = int(os.environ.get('LOG_MAX_BYTES', 10 * 1024 * 1024))   # 10 MB
    LOG_BACKUP_COUNT = int(os.environ.get('LOG_BACKUP_COUNT', 5))


class DevelopmentConfig(Config):
    DEBUG = True
    SQLALCHEMY_DATABASE_URI = os.environ.get(
        'DATABASE_URL',
        'mysql+pymysql://pfm_user:password@localhost/pfm_db'
    )
    SQLALCHEMY_ECHO = False  # set True to log SQL queries during dev


class ProductionConfig(Config):
    DEBUG = False
    SQLALCHEMY_ECHO = False
    SESSION_COOKIE_SECURE = True
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Lax'


config = {
    'development': DevelopmentConfig,
    'production': ProductionConfig,
    'default': DevelopmentConfig,
}