from flask import Blueprint, request, url_for
from ..lib.babycode import babycode_to_html
from .users import is_logged_in, get_active_user
from ..models import APIRateLimits, Threads
from ..db import db

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


@bp.post('/thread-updates/<thread_id>')
def thread_updates(thread_id):
    thread = Threads.find({'id': thread_id})
    if not thread:
        return {'error': 'no such thread'}, 404
    target_time = request.json.get('since')
    if not target_time:
        return {'error': 'missing parameter "since"'}, 400
    try:
        target_time = int(target_time)
    except:
        return {'error': 'parameter "since" is not/cannot be converted to a number'}, 400

    q = 'SELECT id FROM posts WHERE thread_id = ? AND posts.created_at > ? ORDER BY posts.created_at ASC LIMIT 1'
    new_post = db.fetch_one(q, thread_id, target_time)
    if not new_post:
        return {'status': 'none'}

    url = url_for('threads.thread', slug=thread.slug, after=new_post['id'], _anchor=f'post-{new_post['id']}')
    return {'status': 'new_post', 'url': url}


@bp.post('/babycode-preview')
def babycode_preview():
    if not is_logged_in():
        return {'error': 'not authorized'}, 401
    user = get_active_user()
    if not APIRateLimits.is_allowed(user.id, 'babycode_preview', 5):
        return {'error': 'too many requests'}, 429
    markup = request.json.get('markup')
    if not markup or not isinstance(markup, str):
        return {'error': 'markup field missing or invalid type'}, 400
    rendered = babycode_to_html(markup)
    return {'html': rendered}