"""Cart app fragment endpoints.

Exposes HTML fragments at ``/internal/fragments/<type>`` for consumption
by other coop apps via the fragment client.

Fragments:
  cart-mini          Cart icon with badge (or logo when empty)
  account-nav-item   "orders" link for account dashboard
"""

from __future__ import annotations

from quart import Blueprint, Response, request, g

from shared.infrastructure.fragments import FRAGMENT_HEADER


def register():
    bp = Blueprint("fragments", __name__, url_prefix="/internal/fragments")

    # ---------------------------------------------------------------
    # Fragment handlers
    # ---------------------------------------------------------------

    async def _cart_mini():
        from shared.services.registry import services
        from shared.infrastructure.urls import blog_url, cart_url
        from shared.sexp.jinja_bridge import sexp as render_sexp

        user_id = request.args.get("user_id", type=int)
        session_id = request.args.get("session_id")

        summary = await services.cart.cart_summary(
            g.s, user_id=user_id, session_id=session_id,
        )
        count = summary.count + summary.calendar_count + summary.ticket_count
        oob = request.args.get("oob", "")
        return render_sexp(
            '(~cart-mini :cart-count cart-count :blog-url blog-url :cart-url cart-url :oob oob)',
            **{"cart-count": count, "blog-url": blog_url(""), "cart-url": cart_url(""), "oob": oob or None},
        )

    async def _account_nav_item():
        from shared.infrastructure.urls import cart_url
        from shared.sexp.jinja_bridge import sexp as render_sexp

        return render_sexp(
            '(~account-nav-item :href href :label "orders")',
            href=cart_url("/orders/"),
        )

    _handlers = {
        "cart-mini": _cart_mini,
        "account-nav-item": _account_nav_item,
    }

    # ---------------------------------------------------------------
    # Routing
    # ---------------------------------------------------------------

    @bp.before_request
    async def _require_fragment_header():
        if not request.headers.get(FRAGMENT_HEADER):
            return Response("", status=403)

    @bp.get("/<fragment_type>")
    async def get_fragment(fragment_type: str):
        handler = _handlers.get(fragment_type)
        if handler is None:
            return Response("", status=200, content_type="text/html")
        html = await handler()
        return Response(html, status=200, content_type="text/html")

    return bp