"""Cart app action endpoints.

Exposes write operations at ``/internal/actions/<action_name>`` for
cross-app callers (login handler) via the internal action client.
"""
from __future__ import annotations

from quart import Blueprint, g, jsonify, request

from shared.infrastructure.actions import ACTION_HEADER
from shared.services.registry import services


def register() -> Blueprint:
    bp = Blueprint("actions", __name__, url_prefix="/internal/actions")

    @bp.before_request
    async def _require_action_header():
        if not request.headers.get(ACTION_HEADER):
            return jsonify({"error": "forbidden"}), 403

    _handlers: dict[str, object] = {}

    @bp.post("/<action_name>")
    async def handle_action(action_name: str):
        handler = _handlers.get(action_name)
        if handler is None:
            return jsonify({"error": "unknown action"}), 404
        try:
            result = await handler()
            return jsonify(result)
        except Exception as exc:
            import logging
            logging.getLogger(__name__).exception("Action %s failed", action_name)
            return jsonify({"error": str(exc)}), 500

    # --- adopt-cart-for-user ---
    async def _adopt_cart():
        data = await request.get_json()
        await services.cart.adopt_cart_for_user(
            g.s, data["user_id"], data["session_id"],
        )
        return {"ok": True}

    _handlers["adopt-cart-for-user"] = _adopt_cart

    return bp