from functools import cache
from pathlib import Path

from pydantic import BaseModel
from pydantic import Field
from pydantic_settings import BaseSettings
from pydantic_settings import SettingsConfigDict

DEFAULT_ENV_FILE = Path(".env").resolve()
DEFAULT_SITE_DIR = Path("site").resolve()


class Mounts(BaseModel):
    docs: str = "/docs"
    mcp: str = "/mcp"


class Settings(BaseSettings):
    """Runtime settings for the HTTP MCP and docs server."""

    model_config = SettingsConfigDict(
        env_file=DEFAULT_ENV_FILE,
        env_prefix="PERSONAL_MCP_",
        extra="ignore",
        cli_implicit_flags=True,
    )

    debug: bool = False
    log_level: str = "info"
    mounts: Mounts = Field(default_factory=Mounts)
    host: str = "localhost"
    port: int = 8080
    reload: bool = True


@cache
def get_settings(*, cli: bool = False, **overrides) -> Settings:
    return Settings(**overrides, _cli_parse_args=cli)  # pyright: ignore[reportCallIssue]


def refresh_settings(**overrides):
    get_settings.cache_clear()
    return get_settings(**overrides)