from flask import (
    Blueprint, render_template, request, redirect, url_for, flash, session
    )
from .users import login_required, mod_only
from ..models import Users, Topics, Threads
from ..constants import InfoboxKind
from slugify import slugify
import time
import math

bp = Blueprint("topics", __name__, url_prefix = "/topics/")


@bp.get("/")
def all_topics():
    admin = Users.find({"id": 1})
    return render_template("topics/topics.html", topic_list = Topics.get_list(), active_threads = Topics.get_active_threads())


@bp.get("/create")
@login_required
@mod_only(".all_topics")
def create():
    return render_template("topics/create.html")


@bp.post("/create")
@login_required
@mod_only(".all_topics")
def create_post():
    topic_name = request.form['name'].strip()
    now = int(time.time())
    slug = f"{slugify(topic_name)}-{now}"

    topic_count = Topics.count()
    topic = Topics.create({
        "name": topic_name,
        "description": request.form['description'],
        "slug": slug,
        "sort_order": topic_count + 1,
    })

    flash("Topic created.", InfoboxKind.INFO)
    return redirect(url_for("topics.topic", slug = slug))


@bp.get("/<slug>")
def topic(slug):
    THREADS_PER_PAGE = 10
    target_topic = Topics.find({
        "slug": slug
    })
    if not target_topic:
        return "no"

    threads_count = Threads.count({
        "topic_id": target_topic.id
    })

    sort_by = session.get('sort_by', default="activity")

    page_count = max(math.ceil(threads_count / THREADS_PER_PAGE), 1)
    page = max(1, min(int(request.args.get('page', default=1)), page_count))

    return render_template(
        "topics/topic.html",
        threads_list = target_topic.get_threads(THREADS_PER_PAGE, page, sort_by),
        topic = target_topic,
        current_page = page,
        page_count = page_count
    )