from __future__ import annotations


from quart import (
    render_template,
    make_response,
    g,
    Blueprint,
    abort,
    url_for,
    request,
)
from .services.post_data import post_data
from .services.post_operations import toggle_post_like
from shared.services.registry import services
from shared.infrastructure.fragments import fetch_fragment, fetch_fragments

from shared.browser.app.redis_cacher import cache_page, clear_cache


from .admin.routes import register as register_admin
from shared.config import config
from shared.browser.app.utils.htmx import is_htmx_request

def register():
  bp = Blueprint("post", __name__, url_prefix='/<slug>')
  bp.register_blueprint(
    register_admin()
  )

  # Calendar blueprints now live in the events service.
  # Post pages link to events_url() instead of embedding calendars.

  @bp.url_value_preprocessor
  def pull_blog(endpoint, values):
    g.post_slug = values.get("slug")

  @bp.before_request
  async def hydrate_post_data():
    slug = getattr(g, "post_slug", None)
    if not slug:
        return  # not a blog route or no slug in this URL

    is_admin = bool((g.get("rights") or {}).get("admin"))
    # Always include drafts so we can check ownership below
    p_data = await post_data(slug, g.s, include_drafts=True)
    if not p_data:
        abort(404)
        return

    # Access control for draft posts
    if p_data["post"].get("status") != "published":
        if is_admin:
            pass  # admin can see all drafts
        elif g.user and p_data["post"].get("user_id") == g.user.id:
            pass  # author can see their own drafts
        else:
            abort(404)
            return

    g.post_data = p_data

  @bp.context_processor
  async def context():
      p_data = getattr(g, "post_data", None)
      if p_data:
          from shared.infrastructure.cart_identity import current_cart_identity

          db_post_id = (g.post_data.get("post") or {}).get("id")
          post_slug = (g.post_data.get("post") or {}).get("slug", "")

          # Fetch container nav fragments from events + market
          paginate_url = url_for(
              'blog.post.widget_paginate',
              slug=post_slug, widget_domain='calendar',
          )
          nav_params = {
              "container_type": "page",
              "container_id": str(db_post_id),
              "post_slug": post_slug,
              "paginate_url": paginate_url,
          }
          events_nav_html, market_nav_html = await fetch_fragments([
              ("events", "container-nav", nav_params),
              ("market", "container-nav", nav_params),
          ])
          container_nav_html = events_nav_html + market_nav_html

          ctx = {
              **p_data,
              "base_title": f"{config()['title']} {p_data['post']['title']}",
              "container_nav_html": container_nav_html,
          }

          # Page cart badge via service
          post_dict = p_data.get("post") or {}
          if post_dict.get("is_page"):
              ident = current_cart_identity()
              page_summary = await services.cart.cart_summary(
                  g.s, user_id=ident["user_id"], session_id=ident["session_id"],
                  page_slug=post_dict["slug"],
              )
              ctx["page_cart_count"] = page_summary.count + page_summary.calendar_count + page_summary.ticket_count
              ctx["page_cart_total"] = float(page_summary.total + page_summary.calendar_total + page_summary.ticket_total)

          return ctx
      else:
        return {}

  @bp.get("/")
  @cache_page(tag="post.post_detail")
  async def post_detail(slug: str):
    # Determine which template to use based on request type
    if not is_htmx_request():
        # Normal browser request: full page with layout
        html = await render_template("_types/post/index.html")
    else:
        # HTMX request: main panel + OOB elements
        html = await render_template("_types/post/_oob_elements.html")

    return await make_response(html)

  @bp.post("/like/toggle/")
  @clear_cache(tag="post.post_detail", tag_scope="user")
  async def like_toggle(slug: str):
      from shared.utils import host_url

      # Get post_id from g.post_data
      if not g.user:
          html = await render_template(
              "_types/browse/like/button.html",
              slug=slug,
              liked=False,
              like_url=host_url(url_for('blog.post.like_toggle', slug=slug)),
              item_type='post',
          )
          resp = make_response(html, 403)
          return resp

      post_id = g.post_data["post"]["id"]
      user_id = g.user.id

      liked, error = await toggle_post_like(g.s, user_id, post_id)

      if error:
          resp = make_response(error, 404)
          return resp

      html = await render_template(
          "_types/browse/like/button.html",
          slug=slug,
          liked=liked,
          like_url=host_url(url_for('blog.post.like_toggle', slug=slug)),
          item_type='post',
      )
      return html

  @bp.get("/w/<widget_domain>/")
  async def widget_paginate(slug: str, widget_domain: str):
      """Proxies paginated widget requests to the appropriate fragment provider."""
      page = int(request.args.get("page", 1))
      post_id = g.post_data["post"]["id"]

      if widget_domain == "calendar":
          html = await fetch_fragment("events", "container-nav", params={
              "container_type": "page",
              "container_id": str(post_id),
              "post_slug": slug,
              "page": str(page),
              "paginate_url": url_for(
                  'blog.post.widget_paginate',
                  slug=slug, widget_domain='calendar',
              ),
          })
          return await make_response(html or "")
      abort(404)

  return bp