"""Configuration management for the TryMe FastMCP HTTP server."""

from __future__ import annotations

import configparser
import os
from dataclasses import dataclass
from pathlib import Path

PROJECT_ROOT = Path(__file__).resolve().parent.parent


def get_version() -> str:
    """Read application version from version.ini."""
    version_file = PROJECT_ROOT / "version.ini"
    if version_file.exists():
        parser = configparser.ConfigParser()
        parser.read(version_file, encoding="utf-8")
        if parser.has_option("version", "version"):
            return parser.get("version", "version").strip()
    return "0.1"


@dataclass(slots=True)
class Settings:
    """Runtime settings populated from environment variables."""

    version: str
    mcp_host: str
    mcp_port: int
    mcp_path: str
    tryme_base_url: str
    tryme_timeout_seconds: float
    tryme_api_key: str | None
    tryme_bearer_token: str | None
    tryme_session_cookie: str | None

    @classmethod
    def from_env(cls) -> Settings:
        """Load settings from current process environment."""
        raw_path = os.getenv("MCP_PATH", "/mcp").strip() or "/mcp"
        if not raw_path.startswith("/"):
            raw_path = f"/{raw_path}"

        api_key = os.getenv("TRYME_API_KEY", "").strip() or None
        bearer_token = os.getenv("TRYME_BEARER_TOKEN", "").strip() or None
        session_cookie = os.getenv("TRYME_SESSION_COOKIE", "").strip() or None

        return cls(
            version=get_version(),
            mcp_host=os.getenv("MCP_HOST", "0.0.0.0").strip() or "0.0.0.0",
            mcp_port=int(os.getenv("MCP_PORT", "8000")),
            mcp_path=raw_path,
            tryme_base_url=(
                os.getenv("TRYME_BASE_URL", "https://tryme.tpk.pw").strip().rstrip("/")
                or "https://tryme.tpk.pw"
            ),
            tryme_timeout_seconds=float(os.getenv("TRYME_TIMEOUT_SECONDS", "30")),
            tryme_api_key=api_key,
            tryme_bearer_token=bearer_token,
            tryme_session_cookie=session_cookie,
        )


settings = Settings.from_env()