from pydantic_settings import BaseSettings
from typing import Optional
from pathlib import Path


PROJECT_ROOT = Path(__file__).resolve().parents[2]
ENV_FILE = PROJECT_ROOT / ".env"


class Settings(BaseSettings):
    class Config:
        env_file = str(ENV_FILE)
        env_file_encoding = "utf-8"
        extra = "ignore"

    APP_NAME: str = "TradeMate"

    SECRET_KEY: str
    JWT_ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60
    REFRESH_TOKEN_EXPIRE_DAYS: int = 30

    DATABASE_URL: str
    DB_ECHO: bool = False

    REDIS_URL: str = "redis://localhost:6379/0"

    CELERY_BROKER_URL: str = "redis://localhost:6379/1"
    CELERY_RESULT_BACKEND: str = "redis://localhost:6379/2"

    SENSENOVA_API_KEY: Optional[str] = None
    SENSENOVA_BASE_URL: str = "https://token.sensenova.cn/v1"
    SENSENOVA_MODEL: str = "deepseek-v4-flash"



    NVIDIA_API_KEY: Optional[str] = None
    NVIDIA_BASE_URL: str = "https://integrate.api.nvidia.com/v1"
    NVIDIA_MODEL: str = "stepfun-ai/step-3.5-flash"

    WHATSAPP_API_TOKEN: Optional[str] = None
    WHATSAPP_PHONE_NUMBER_ID: Optional[str] = None
    WHATSAPP_WEBHOOK_VERIFY_TOKEN: Optional[str] = None

    ALIBABA_ACCESS_KEY_ID: Optional[str] = None
    ALIBABA_ACCESS_KEY_SECRET: Optional[str] = None

    WECHAT_APP_ID: Optional[str] = None
    WECHAT_APP_SECRET: Optional[str] = None
    WECHAT_PUSH_TEMPLATE_ID: Optional[str] = None

    PAY_API_KEY: Optional[str] = None
    PAY_API_SECRET: Optional[str] = None
    PAY_API_BASE_URL: str = "https://www.yzrcloud.cn/api/gateway"
    PAY_WEBHOOK_URL: str = "https://example.com/api/v1/payment/webhook"

    EXCHANGE_RATE_API_KEY: Optional[str] = None

    GOOGLE_API_KEY: Optional[str] = None
    GOOGLE_CSE_ID: Optional[str] = None

    UPLOAD_DIR: str = "./uploads"
    MAX_UPLOAD_SIZE: int = 10 * 1024 * 1024

    FRONTEND_URL: str = "http://localhost:3000"
    BACKEND_URL: str = "http://localhost:8000"

    SENTRY_DSN: Optional[str] = None
    DEBUG: bool = True

    FREE_DAILY_TRANSLATE_CHARS: int = 5000
    FREE_DAILY_REPLIES: int = 20
    FREE_DAILY_MARKETING: int = 5
    FREE_MAX_CUSTOMERS: int = 5
    FREE_MAX_PRODUCTS: int = 1
    FREE_DAILY_QUOTATIONS: int = 3

    TRIAL_DAYS: int = 7

    PRO_DAILY_TRANSLATE_CHARS: int = 50000
    PRO_DAILY_REPLIES: int = 200
    PRO_DAILY_MARKETING: int = 50
    PRO_MAX_CUSTOMERS: int = 100
    PRO_MAX_PRODUCTS: int = 20
    PRO_DAILY_QUOTATIONS: int = 30

    # Stripe
    STRIPE_SECRET_KEY: Optional[str] = None
    STRIPE_WEBHOOK_SECRET: Optional[str] = None
    STRIPE_PRICE_ID_20: Optional[str] = None
    STRIPE_PRICE_ID_100: Optional[str] = None
    STRIPE_PRICE_ID_500: Optional[str] = None
    STRIPE_PRICE_ID_2000: Optional[str] = None

    # PayPal
    PAYPAL_CLIENT_ID: Optional[str] = None
    PAYPAL_CLIENT_SECRET: Optional[str] = None
    PAYPAL_WEBHOOK_ID: Optional[str] = None
    PAYPAL_SANDBOX: bool = True

    # PingPong
    PINGPONG_CLIENT_ID: Optional[str] = None
    PINGPONG_ACC_ID: Optional[str] = None
    PINGPONG_SECRET_KEY: Optional[str] = None
    PINGPONG_SANDBOX: bool = True
    PINGPONG_REGION: str = "EU"

    # Payment prices
    PRO_MONTHLY_PRICE: int = 99
    PRO_YEARLY_PRICE: int = 999
    ENTERPRISE_MONTHLY_PRICE: int = 399
    ENTERPRISE_YEARLY_PRICE: int = 3999

    # File upload limits
    MAX_UPLOAD_SIZE: int = 10 * 1024 * 1024  # 10MB
    MAX_EXCEL_ROWS: int = 10000
    
    # Rate limiting
    GUEST_LOGIN_LIMIT: int = 5
    GUEST_LOGIN_WINDOW: int = 900  # 15 minutes
    
    # Pagination defaults
    DEFAULT_PAGE_SIZE: int = 20
    MAX_PAGE_SIZE: int = 100


settings = Settings()