from __future__ import annotations

from quart import (
    request, render_template, make_response, Blueprint, g
)
from sqlalchemy import select

from models.calendars import Calendar

from .services.calendars import (
    create_calendar as svc_create_calendar,
)

from ..calendar.routes import register as register_calendar

from suma_browser.app.redis_cacher import cache_page, clear_cache

from suma_browser.app.authz import require_admin
from suma_browser.app.utils.htmx import is_htmx_request


def register():
    bp = Blueprint("calendars", __name__, url_prefix='/calendars')
    bp.register_blueprint(
      register_calendar(),
    )
    @bp.context_processor
    async def inject_root():
        # Must always return a dict
        return {}

    # ---------- Pages ----------

    @bp.get("/")
    @cache_page(tag="calendars")
    async def home(**kwargs):
        if not is_htmx_request():
            html = await render_template(
                "_types/calendars/index.html",
            )
        else:
            html = await render_template(
                "_types/calendars/_oob_elements.html",
            )
        return await make_response(html)


    @bp.post("/new/")
    @require_admin
    @clear_cache(tag="calendars", tag_scope="all")
    async def create_calendar(**kwargs):
        form = await request.form
        name = (form.get("name") or "").strip()

        # Get post_id from context if available (blog-embedded mode)
        post_data = getattr(g, "post_data", None)
        post_id = (post_data.get("post") or {}).get("id") if post_data else None

        if not post_id:
            # Standalone mode: post_id from form (or None — calendar without post)
            post_id = form.get("post_id")
            if post_id:
                post_id = int(post_id)

        try:
            await svc_create_calendar(g.s, post_id, name)
        except Exception as e:
            return await make_response(f'<div class="text-red-600 text-sm">{e}</div>', 422)

        html = await render_template(
            "_types/calendars/index.html",
        )

        # Blog-embedded mode: also update post nav
        if post_data:
            from ..post.services.entry_associations import get_associated_entries

            cals = (
                await g.s.execute(
                    select(Calendar)
                    .where(Calendar.post_id == post_id, Calendar.deleted_at.is_(None))
                    .order_by(Calendar.name.asc())
                )
            ).scalars().all()

            associated_entries = await get_associated_entries(g.s, post_id)

            nav_oob = await render_template(
                "_types/post/admin/_nav_entries_oob.html",
                associated_entries=associated_entries,
                calendars=cals,
                post=post_data["post"],
            )

            html = html + nav_oob

        return await make_response(html)
    return bp