from functools import lru_cache

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", case_sensitive=False)

    github_username: str = Field(alias="GITHUB_USERNAME")
    github_token: str | None = Field(default=None, alias="GITHUB_TOKEN")

    gitea_base_url: str = Field(alias="GITEA_BASE_URL")
    gitea_username: str = Field(alias="GITEA_USERNAME")
    gitea_token: str | None = Field(default=None, alias="GITEA_TOKEN")

    cache_ttl_seconds: int | None = Field(default=None, alias="CACHE_TTL_SECONDS")
    cache_dir: str | None = Field(default=None, alias="CACHE_DIR")

    default_theme: str = Field(default="light", alias="DEFAULT_THEME")
    service_title: str = Field(default="git-activity-merge", alias="SERVICE_TITLE")


@lru_cache(maxsize=1)
def get_settings() -> Settings:
    return Settings()