"""HTTP 响应和 Cookie 工具。"""

from __future__ import annotations

import json
from http import HTTPStatus
from http.server import BaseHTTPRequestHandler
from typing import Any

from group_system.config import SESSION_DAYS


def json_response(
    status: int | HTTPStatus,
    payload: Any,
    cookies: list[dict[str, Any]] | None = None,
):
    """Return a callable that serializes and sends a JSON response."""
    def send(handler: BaseHTTPRequestHandler):
        body = json.dumps(payload, ensure_ascii=False).encode("utf-8")
        handler.send_response(int(status))
        handler.send_header("Content-Type", "application/json; charset=utf-8")
        handler.send_header("Cache-Control", "no-store")
        handler.send_header("Content-Length", str(len(body)))
        for cookie in cookies or []:
            handler.send_header("Set-Cookie", cookie["value"])
        handler.end_headers()
        handler.wfile.write(body)

    return send


def make_session_cookie(token: str) -> str:
    return (
        f"GROUP_SESSION={token}; Path=/; HttpOnly; SameSite=Lax; "
        f"Max-Age={SESSION_DAYS * 86400}"
    )


def clear_session_cookie() -> str:
    return "GROUP_SESSION=; Path=/; HttpOnly; SameSite=Lax; Max-Age=0"