from __future__ import annotations


from quart import (
    render_template,
    make_response,
    g,
    Blueprint,
    abort,
    url_for,
)
from .services.post_data import post_data
from .services.post_operations import toggle_post_like
from models.calendars import Calendar
from sqlalchemy import select

from suma_browser.app.redis_cacher import cache_page, clear_cache


from .admin.routes import register as register_admin
from config import config
from suma_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 .services.entry_associations import get_associated_entries

          db_post_id = (g.post_data.get("post") or {}).get("id")  # <-- integer
          calendars = (
              await g.s.execute(
                  select(Calendar)
                  .where(Calendar.post_id == db_post_id, Calendar.deleted_at.is_(None))
                  .order_by(Calendar.name.asc())
              )
          ).scalars().all()

          # Fetch associated entries for nav display
          associated_entries = await get_associated_entries(g.s, db_post_id)

          return {
              **p_data,
              "base_title": f"{config()['title']} {p_data['post']['title']}",
              "calendars": calendars,
              "associated_entries": associated_entries,
          }
      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 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("/entries/")
  async def get_entries(slug: str):
      """Get paginated associated entries for infinite scroll in nav"""
      from .services.entry_associations import get_associated_entries
      from quart import request

      page = int(request.args.get("page", 1))
      post_id = g.post_data["post"]["id"]

      result = await get_associated_entries(g.s, post_id, page=page, per_page=10)

      html = await render_template(
          "_types/post/_entry_items.html",
          entries=result["entries"],
          page=result["page"],
          has_more=result["has_more"],
      )
      return await make_response(html)

  return bp