"""
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, render_template, render_template_string, make_response

from shared.browser.app.utils.htmx import is_htmx_request
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)

        ctx = dict(
            entries=entries,
            has_more=has_more,
            pending_tickets=pending_tickets,
            page_info={},
            page=page,
            view=view,
        )

        if is_htmx_request():
            html = await render_template("_types/page_summary/_main_panel.html", **ctx)
        else:
            html = await render_template("_types/page_summary/index.html", **ctx)

        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)

        html = await render_template(
            "_types/page_summary/_cards.html",
            entries=entries,
            has_more=has_more,
            pending_tickets=pending_tickets,
            page_info={},
            page=page,
            view=view,
        )
        return await make_response(html, 200)

    @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)

        # Updated cart count for OOB mini-cart
        summary = await services.cart.cart_summary(
            g.s, user_id=ident["user_id"], session_id=ident["session_id"],
        )
        cart_count = summary.count + summary.calendar_count + summary.ticket_count

        # Render widget + OOB cart-mini
        widget_html = await render_template(
            "_types/page_summary/_ticket_widget.html",
            entry=entry,
            qty=qty,
            ticket_url=f"/{g.post_slug}/tickets/adjust",
        )
        mini_html = await render_template_string(
            '{% from "_types/cart/_mini.html" import mini with context %}'
            '{{ mini(oob="true") }}',
            cart_count=cart_count,
        )
        return await make_response(widget_html + mini_html, 200)

    return bp