"""Market app fragment endpoints.

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

from __future__ import annotations

from quart import Blueprint, Response, g, render_template, request

from shared.infrastructure.fragments import FRAGMENT_HEADER
from shared.services.registry import services


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

    _handlers: dict[str, object] = {}

    @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")

    # --- container-nav fragment: market links --------------------------------

    async def _container_nav_handler():
        container_type = request.args.get("container_type", "page")
        container_id = int(request.args.get("container_id", 0))
        post_slug = request.args.get("post_slug", "")

        markets = await services.market.marketplaces_for_container(
            g.s, container_type, container_id,
        )
        if not markets:
            return ""
        return await render_template(
            "fragments/container_nav_markets.html",
            markets=markets, post_slug=post_slug,
        )

    _handlers["container-nav"] = _container_nav_handler

    bp._fragment_handlers = _handlers

    return bp