"""
Central Backend Configuration
"""
from pydantic_settings import BaseSettings
from typing import List, Optional
from functools import lru_cache


class Settings(BaseSettings):
    # Application
    APP_NAME: str = "AI360 Platform"
    APP_ENV: str = "development"
    DEBUG: bool = True
    SECRET_KEY: str = "change-me-in-production"
    API_VERSION: str = "v1"

    # Server
    HOST: str = "0.0.0.0"
    PORT: int = 8000
    WORKERS: int = 4

    # Database
    DATABASE_URL: str = "postgresql+asyncpg://postgres:password@localhost:5432/ai360_platform"
    DATABASE_POOL_SIZE: int = 20
    DATABASE_MAX_OVERFLOW: int = 10

    # Redis
    REDIS_URL: str = "redis://localhost:6379/0"
    REDIS_PASSWORD: Optional[str] = None

    # JWT
    JWT_SECRET_KEY: str = "jwt-secret-change-in-production"
    JWT_ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
    REFRESH_TOKEN_EXPIRE_DAYS: int = 7

    # Microservices
    CHATBOT_SERVICE_URL: str = "http://localhost:8001"
    DOCUMENT_SERVICE_URL: str = "http://localhost:8002"
    ANALYTICS_SERVICE_URL: str = "http://localhost:8003"
    VISION_SERVICE_URL: str = "http://localhost:8004"

    # Payment - Stripe
    STRIPE_SECRET_KEY: Optional[str] = None
    STRIPE_PUBLISHABLE_KEY: Optional[str] = None
    STRIPE_WEBHOOK_SECRET: Optional[str] = None

    # Payment - Razorpay
    RAZORPAY_KEY_ID: Optional[str] = None
    RAZORPAY_KEY_SECRET: Optional[str] = None

    # Email
    SMTP_HOST: str = "smtp.gmail.com"
    SMTP_PORT: int = 587
    SMTP_USER: Optional[str] = None
    SMTP_PASSWORD: Optional[str] = None
    FROM_EMAIL: str = "noreply@ai360.com"
    FROM_NAME: str = "AI360 Platform"

    # AWS
    AWS_ACCESS_KEY_ID: Optional[str] = None
    AWS_SECRET_ACCESS_KEY: Optional[str] = None
    AWS_REGION: str = "ap-south-1"
    S3_BUCKET_NAME: Optional[str] = None
    AWS_S3_BUCKET: Optional[str] = None

    # OAuth
    GOOGLE_CLIENT_ID: Optional[str] = None
    GOOGLE_CLIENT_SECRET: Optional[str] = None
    GITHUB_CLIENT_ID: Optional[str] = None
    GITHUB_CLIENT_SECRET: Optional[str] = None

    # AI Providers - OpenAI
    OPENAI_API_KEY: Optional[str] = None
    OPENAI_ORG_ID: Optional[str] = None
    OPENAI_DEFAULT_MODEL: str = "gpt-4"

    # AI Providers - Anthropic
    ANTHROPIC_API_KEY: Optional[str] = None
    ANTHROPIC_DEFAULT_MODEL: str = "claude-3-sonnet-20240229"

    # AI Providers - Google AI
    GOOGLE_AI_API_KEY: Optional[str] = None
    GOOGLE_DEFAULT_MODEL: str = "gemini-1.5-pro"

    # AI Providers - Azure OpenAI
    AZURE_OPENAI_API_KEY: Optional[str] = None
    AZURE_OPENAI_ENDPOINT: Optional[str] = None
    AZURE_OPENAI_API_VERSION: str = "2024-02-01"
    AZURE_OPENAI_DEPLOYMENT_NAME: Optional[str] = None

    # Voice Services - ElevenLabs
    ELEVENLABS_API_KEY: Optional[str] = None
    ELEVENLABS_VOICE_ID: Optional[str] = None

    # Twilio (SMS/Voice)
    TWILIO_ACCOUNT_SID: Optional[str] = None
    TWILIO_AUTH_TOKEN: Optional[str] = None
    TWILIO_PHONE_NUMBER: Optional[str] = None

    # Rate Limiting
    RATE_LIMIT_PER_MINUTE: int = 60
    RATE_LIMIT_PER_HOUR: int = 1000

    # CORS
    CORS_ORIGINS: str = "http://localhost:3000,http://localhost:3001,http://localhost:5173,https://ai-360.shop,https://www.ai-360.shop,https://portal.ai-360.shop,https://admin.ai-360.shop,https://api.ai-360.shop"

    # Logging
    LOG_LEVEL: str = "INFO"

    @property
    def cors_origins_list(self) -> List[str]:
        return [origin.strip() for origin in self.CORS_ORIGINS.split(",")]

    class Config:
        env_file = ".env"
        case_sensitive = True


@lru_cache()
def get_settings() -> Settings:
    return Settings()


settings = get_settings()