"""
All-events blueprint — shows upcoming events across ALL pages' calendars.

Mounted at / (root of events app). No slug context — works independently
of the post/slug machinery.

Routes:
  GET  /                  — full page with first page of entries
  GET  /all-entries       — HTMX fragment for infinite scroll
  POST /all-tickets/adjust — adjust ticket quantity inline
"""
from __future__ import annotations

from quart import Blueprint, g, request, render_template, 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.infrastructure.data_client import fetch_data
from shared.contracts.dtos import PostDTO, dto_from_dict
from shared.services.registry import services


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

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

        # Batch-load page info for container_ids
        page_info = {}  # {post_id: {title, slug}}
        if entries:
            post_ids = list({
                e.calendar_container_id
                for e in entries
                if e.calendar_container_type == "page" and e.calendar_container_id
            })
            if post_ids:
                raw_posts = await fetch_data("blog", "posts-by-ids",
                                             params={"ids": ",".join(str(i) for i in post_ids)},
                                             required=False) or []
                for raw_p in raw_posts:
                    p = dto_from_dict(PostDTO, raw_p)
                    page_info[p.id] = {"title": p.title, "slug": p.slug}

        return entries, has_more, pending_tickets, page_info

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

        entries, has_more, pending_tickets, page_info = await _load_entries(page)

        from shared.sx.page import get_template_context
        from sx.sx_components import render_all_events_page, render_all_events_oob

        ctx = await get_template_context()
        if is_htmx_request():
            sx_src = await render_all_events_oob(ctx, entries, has_more, pending_tickets, page_info, page, view)
            return sx_response(sx_src)
        else:
            html = await render_all_events_page(ctx, entries, has_more, pending_tickets, page_info, page, view)
            return await make_response(html, 200)

    @bp.get("/all-entries")
    async def entries_fragment():
        view = request.args.get("view", "list")
        page = int(request.args.get("page", 1))

        entries, has_more, pending_tickets, page_info = await _load_entries(page)

        from sx.sx_components import render_all_events_cards
        sx_src = await render_all_events_cards(entries, has_more, pending_tickets, page_info, page, view)
        return sx_response(sx_src)

    @bp.post("/all-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 sx.sx_components import render_ticket_widget
        widget_html = render_ticket_widget(entry, qty, "/all-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
