"""Events app fragment endpoints.

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

Most handlers are defined declaratively in .sx files under
``events/sx/handlers/`` and dispatched via the sx handler registry.

Jinja HTML handlers (container-cards, account-page) remain as Python
because they return ``text/html`` templates, not sx source.
"""

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
from shared.sx.handlers import get_handler, execute_handler


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

    _handlers: dict[str, object] = {}

    # Fragment types that return HTML (Jinja templates)
    _html_types = {"container-cards", "account-page"}

    @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):
        # 1. Check Python handlers first (Jinja HTML types)
        handler = _handlers.get(fragment_type)
        if handler is not None:
            result = await handler()
            ct = "text/html" if fragment_type in _html_types else "text/sx"
            return Response(result, status=200, content_type=ct)

        # 2. Check sx handler registry
        handler_def = get_handler("events", fragment_type)
        if handler_def is not None:
            result = await execute_handler(
                handler_def, "events", args=dict(request.args),
            )
            return Response(result, status=200, content_type="text/sx")

        return Response("", status=200, content_type="text/sx")

    # --- container-cards fragment: entries for blog listing cards (Jinja HTML) --

    async def _container_cards_handler():
        post_ids_raw = request.args.get("post_ids", "")
        post_slugs_raw = request.args.get("post_slugs", "")
        post_ids = [int(x) for x in post_ids_raw.split(",") if x.strip()]
        post_slugs = [x.strip() for x in post_slugs_raw.split(",") if x.strip()]
        if not post_ids:
            return ""

        slug_map = {}
        for i, pid in enumerate(post_ids):
            slug_map[pid] = post_slugs[i] if i < len(post_slugs) else ""

        batch = await services.calendar.confirmed_entries_for_posts(g.s, post_ids)
        return await render_template(
            "fragments/container_cards_entries.html",
            batch=batch, post_ids=post_ids, slug_map=slug_map,
        )

    _handlers["container-cards"] = _container_cards_handler

    # --- account-page fragment: tickets or bookings panel (Jinja HTML) ------

    async def _account_page_handler():
        slug = request.args.get("slug", "")
        user_id = request.args.get("user_id", type=int)
        if not user_id:
            return ""

        if slug == "tickets":
            tickets = await services.calendar.user_tickets(g.s, user_id=user_id)
            return await render_template(
                "fragments/account_page_tickets.html",
                tickets=tickets,
            )
        elif slug == "bookings":
            bookings = await services.calendar.user_bookings(g.s, user_id=user_id)
            return await render_template(
                "fragments/account_page_bookings.html",
                bookings=bookings,
            )
        return ""

    _handlers["account-page"] = _account_page_handler

    bp._fragment_handlers = _handlers

    return bp