from pydantic_settings import BaseSettings
from functools import lru_cache


class Settings(BaseSettings):
    # Environment
    env: str = "development"  # "development" or "production"

    # Server
    server_host: str = "0.0.0.0"
    server_port: int = 8080

    # Database
    database_host: str = "localhost"
    database_port: int = 5432
    database_user: str = "orchard"
    database_password: str = ""
    database_dbname: str = "orchard"
    database_sslmode: str = "disable"

    # Database connection pool settings
    database_pool_size: int = 5  # Number of connections to keep open
    database_max_overflow: int = 10  # Max additional connections beyond pool_size
    database_pool_timeout: int = 30  # Seconds to wait for a connection from pool
    database_pool_recycle: int = 1800  # Recycle connections after this many seconds (30 min)

    # S3
    s3_endpoint: str = ""
    s3_region: str = "us-east-1"
    s3_bucket: str = "orchard-artifacts"
    s3_access_key_id: str = ""
    s3_secret_access_key: str = ""
    s3_use_path_style: bool = True

    # Download settings
    download_mode: str = "presigned"  # "presigned", "redirect", or "proxy"
    presigned_url_expiry: int = 3600  # Presigned URL expiry in seconds (default: 1 hour)

    @property
    def database_url(self) -> str:
        sslmode = f"?sslmode={self.database_sslmode}" if self.database_sslmode else ""
        return f"postgresql://{self.database_user}:{self.database_password}@{self.database_host}:{self.database_port}/{self.database_dbname}{sslmode}"

    @property
    def is_development(self) -> bool:
        return self.env.lower() == "development"

    @property
    def is_production(self) -> bool:
        return self.env.lower() == "production"

    class Config:
        env_prefix = "ORCHARD_"
        case_sensitive = False


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