"""
Page summary blueprint — shows upcoming events for a single page's calendars.

Routes:
  GET  /<slug>/              — full page scoped to this page
  GET  /<slug>/entries       — HTMX fragment for infinite scroll
  POST /<slug>/tickets/adjust — adjust ticket quantity inline
"""
from __future__ import annotations

from quart import Blueprint, g, request, make_response

from shared.browser.app.utils.htmx import is_htmx_request
from shared.sx.helpers import sx_response
from shared.infrastructure.cart_identity import current_cart_identity
from shared.services.registry import services


def register() -> Blueprint:
    bp = Blueprint("page_summary", __name__)

    async def _load_entries(post_id, page, per_page=20):
        """Load upcoming entries for this page + pending ticket counts."""
        entries, has_more = await services.calendar.upcoming_entries_for_container(
            g.s, "page", post_id, page=page, per_page=per_page,
        )

        # Pending ticket counts keyed by entry_id
        ident = current_cart_identity()
        pending_tickets = {}
        if entries:
            tickets = await services.calendar.pending_tickets(
                g.s, user_id=ident["user_id"], session_id=ident["session_id"],
            )
            for t in tickets:
                if t.entry_id is not None:
                    pending_tickets[t.entry_id] = pending_tickets.get(t.entry_id, 0) + 1

        return entries, has_more, pending_tickets

    @bp.get("/")
    async def index():
        post = g.post_data["post"]
        view = request.args.get("view", "list")
        page = int(request.args.get("page", 1))

        entries, has_more, pending_tickets = await _load_entries(post["id"], page)

        from shared.sx.page import get_template_context
        from sxc.pages.renders import render_page_summary_page, render_page_summary_oob

        ctx = await get_template_context()
        if is_htmx_request():
            sx_src = await render_page_summary_oob(ctx, entries, has_more, pending_tickets, {}, page, view)
            return sx_response(sx_src)
        else:
            html = await render_page_summary_page(ctx, entries, has_more, pending_tickets, {}, page, view)
            return await make_response(html, 200)

    @bp.get("/entries")
    async def entries_fragment():
        post = g.post_data["post"]
        view = request.args.get("view", "list")
        page = int(request.args.get("page", 1))

        entries, has_more, pending_tickets = await _load_entries(post["id"], page)

        from sxc.pages.renders import render_page_summary_cards
        sx_src = render_page_summary_cards(entries, has_more, pending_tickets, {}, page, view, post)
        return sx_response(sx_src)

    @bp.post("/tickets/adjust")
    async def adjust_ticket():
        """Adjust ticket quantity, return updated widget + OOB cart-mini."""
        ident = current_cart_identity()
        form = await request.form
        entry_id = int(form.get("entry_id", 0))
        count = max(int(form.get("count", 0)), 0)
        tt_raw = (form.get("ticket_type_id") or "").strip()
        ticket_type_id = int(tt_raw) if tt_raw else None

        await services.calendar.adjust_ticket_quantity(
            g.s, entry_id, count,
            user_id=ident["user_id"],
            session_id=ident["session_id"],
            ticket_type_id=ticket_type_id,
        )

        # Get updated ticket count for this entry
        tickets = await services.calendar.pending_tickets(
            g.s, user_id=ident["user_id"], session_id=ident["session_id"],
        )
        qty = sum(1 for t in tickets if t.entry_id == entry_id)

        # Load entry DTO for the widget template
        entry = await services.calendar.entry_by_id(g.s, entry_id)

        # Commit so cross-service calls see the updated tickets
        await g.tx.commit()
        g.tx = await g.s.begin()

        from shared.infrastructure.fragments import fetch_fragment
        frag_params = {"oob": "1"}
        if ident["user_id"] is not None:
            frag_params["user_id"] = str(ident["user_id"])
        if ident["session_id"] is not None:
            frag_params["session_id"] = ident["session_id"]

        from sxc.pages.tickets import render_ticket_widget
        widget_html = render_ticket_widget(entry, qty, f"/{g.post_slug}/tickets/adjust")
        mini_html = await fetch_fragment("cart", "cart-mini", params=frag_params, required=False)
        return sx_response(widget_html + (mini_html or ""))

    return bp
