"""
Application Configuration
"""

from typing import List
from pydantic_settings import BaseSettings
from functools import lru_cache


class Settings(BaseSettings):
    """Application settings loaded from environment variables."""
    
    # Application
    VERSION: str = "0.1.0"
    DEBUG: bool = False
    SECRET_KEY: str = "change-me-in-production"
    
    # Server
    BACKEND_HOST: str = "0.0.0.0"
    BACKEND_PORT: int = 8000
    CORS_ORIGINS: List[str] = ["http://localhost:3000", "http://localhost:5173"]
    
    # Database
    POSTGRES_HOST: str = "localhost"
    POSTGRES_PORT: int = 5432
    POSTGRES_DB: str = "marketscanner"
    POSTGRES_USER: str = "marketscanner"
    POSTGRES_PASSWORD: str = "changeme"
    
    @property
    def DATABASE_URL(self) -> str:
        return f"postgresql+asyncpg://{self.POSTGRES_USER}:{self.POSTGRES_PASSWORD}@{self.POSTGRES_HOST}:{self.POSTGRES_PORT}/{self.POSTGRES_DB}"
    
    @property
    def DATABASE_URL_SYNC(self) -> str:
        return f"postgresql://{self.POSTGRES_USER}:{self.POSTGRES_PASSWORD}@{self.POSTGRES_HOST}:{self.POSTGRES_PORT}/{self.POSTGRES_DB}"
    
    # Redis
    REDIS_HOST: str = "localhost"
    REDIS_PORT: int = 6379
    REDIS_PASSWORD: str = ""
    
    @property
    def REDIS_URL(self) -> str:
        if self.REDIS_PASSWORD:
            return f"redis://:{self.REDIS_PASSWORD}@{self.REDIS_HOST}:{self.REDIS_PORT}/0"
        return f"redis://{self.REDIS_HOST}:{self.REDIS_PORT}/0"
    
    # RabbitMQ
    RABBITMQ_HOST: str = "localhost"
    RABBITMQ_PORT: int = 5672
    RABBITMQ_USER: str = "guest"
    RABBITMQ_PASSWORD: str = "guest"
    
    @property
    def RABBITMQ_URL(self) -> str:
        return f"amqp://{self.RABBITMQ_USER}:{self.RABBITMQ_PASSWORD}@{self.RABBITMQ_HOST}:{self.RABBITMQ_PORT}//"
    
    # API Keys - Stock Data
    ALPHA_VANTAGE_API_KEY: str = ""
    POLYGON_API_KEY: str = ""
    YAHOO_FINANCE_ENABLED: bool = True
    FINNHUB_API_KEY: str = ""
    
    # API Keys - News
    NEWS_API_KEY: str = ""
    
    # API Keys - AI
    OPENAI_API_KEY: str = ""
    OPENAI_MODEL: str = "gpt-4o-mini"
    USE_LOCAL_LLM: bool = False
    OLLAMA_HOST: str = "http://localhost:11434"
    OLLAMA_MODEL: str = "llama3.2"
    
    # Scanning Settings
    NEWS_SCAN_INTERVAL: int = 300  # seconds
    STOCK_PRICE_INTERVAL: int = 60  # seconds
    MAX_TRACKED_STOCKS: int = 500
    PANIC_THRESHOLD: float = -50.0
    
    # Alerts
    TELEGRAM_BOT_TOKEN: str = ""
    TELEGRAM_CHAT_ID: str = ""
    DISCORD_WEBHOOK_URL: str = ""
    
    class Config:
        env_file = ".env"
        case_sensitive = True


@lru_cache()
def get_settings() -> Settings:
    """Get cached settings instance."""
    return Settings()


settings = get_settings()