from typing import Annotated, Any, Literal

from pydantic import (
    AnyUrl,
    BeforeValidator,
    PostgresDsn,
    computed_field
)
from pydantic_core import MultiHostUrl
from pydantic_settings import BaseSettings, SettingsConfigDict


def parse_cors(v: Any) -> list[str] | str:
    if isinstance(v, str) and not v.startswith("["):
        return [i.strip() for i in v.split(",")]
    elif isinstance(v, list | str):
        return v
    raise ValueError(v)


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=".env",
        env_ignore_empty=True,
        extra="ignore",
    )
    ENVIRONMENT: Literal["local", "production"] = "local"

    BACKEND_CORS_ORIGINS: Annotated[
        list[AnyUrl] | str, BeforeValidator(parse_cors)
    ] = []

    @computed_field  # type: ignore[prop-decorator]
    @property
    def all_cors_origins(self) -> list[str]:
        return [str(origin).rstrip("/") for origin in self.BACKEND_CORS_ORIGINS]

    PROJECT_NAME: str = "Gondul"
    POSTGRES_SERVER: str = "localhost"
    POSTGRES_PORT: int = 5432
    POSTGRES_USERNAME: str = "postgres"
    POSTGRES_PASSWORD: str
    POSTGRES_DATABASE: str = "postgres"
    
    REDIS_SERVER: str = "localhost"
    REDIS_PORT: int = 6379
    REDIS_DB: int = 0
    
    NETBOX_URL: str = "http://localhost"
    NETBOX_TOKEN: str = ""

    @computed_field  # type: ignore[prop-decorator]
    @property
    def SQLALCHEMY_DATABASE_URI(self) -> PostgresDsn:
        return MultiHostUrl.build(
            scheme="postgresql+psycopg",
            username=self.POSTGRES_USERNAME,
            password=self.POSTGRES_PASSWORD,
            host=self.POSTGRES_SERVER,
            port=self.POSTGRES_PORT,
            path=self.POSTGRES_DATABASE,
        )


settings = Settings()  # type: ignore