from flask import Flask, request, render_template, send_from_directory, abort, redirect
from flask_sqlalchemy import SQLAlchemy
from flask_limiter import Limiter
from flask_limiter.util import get_remote_address
from mastodon import Mastodon
import re
from datetime import datetime
from dateutil.tz import tzlocal
import html2text
from config  import C

app = Flask(__name__)
app.config.from_object('config.C')

th = Mastodon(
    access_token = C.token,
    api_base_url = 'https://' + C.domain
)

limiter = Limiter(
    app,
    key_func=get_remote_address,
    default_limits=["50 / minute"],
)

h2t = html2text.HTML2Text()
h2t.ignore_links = True

db = SQLAlchemy(app)

class Candidate(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    content = db.Column(db.String(4000))
    private = db.Column(db.String(1000))
    url = db.Column(db.String(50))
    time = db.Column(db.DateTime)
    toot = db.Column(db.BigInteger)

db.create_all()

@app.route('/ordinary/')
def can_list():
    key = request.args.get('key')
    pag = Candidate.query.order_by(db.desc('id')).paginate(max_per_page=100)

    vs = [{
        'name': name,
        'ques': ques,
        'hint': hint
        } for name, ques, hint, ans in C.verify
        ]

    return render_template('list.html', pagination=pag, vs=vs, showPrivate=(key==C.key))

@app.route('/ordinary/new', methods=['POST'])
@limiter.limit("5 / hour; 1 / 2 second")
def new_one():

    content = request.form.get('text')
    private = request.form.get('privateText')
    url = request.form.get('url')

    for name, ques, hint, ans in C.verify:
        if request.form.get(name) != ans: abort(401)

    if not content or len(content)>4000: abort(422)
    if    private and len(private)>1000: abort(422)
    if url and not re.match('https://(cloud\.tsinghua\.edu\.cn/f/[0-9a-z]+/(\?dl=1)?)|(closed\.social/safeShare/\d([a-zA-Z]+)?)', url): abort(422)

    if not Candidate.query.filter_by(content=content).first():
        toot = th.status_post(
                f"叮~ 有新的自荐报名（大家可以直接在此处评论）：\n\n{content}",
                visibility='unlisted'
            )

        c = Candidate(
                content=content,
                private=private,
                url=url,
                toot=toot.id,
                time=datetime.now()
            )
        db.session.add(c)
        db.session.commit()

    return redirect(".")

@limiter.limit("100 / hour; 2 / second")
@app.route('/ordinary/<int:toot>')
def get_replies(toot):
    c = Candidate.query.filter_by(toot=toot).first()
    if not c:
        abort(404)

    context = th.status_context(toot)
    replies = [
            {
                'disp': (t.account.display_name or t.account.acct),
                'url': t.account.url,
                'content': h2t.handle(t.content).replace(C.bot_name,'').strip(),
                'time': str(t.created_at)
                }
            for t in context.descendants
        ]
    d = list(filter(
            lambda r: r['content'] == '删除' and r['url'].split('/@')[1] in C.admins,
            replies
            ))
    if d:
        db.session.delete(c)
        db.session.commit()
        th.status_delete(toot)
        return '该内容已被删除', 404

    return {'replies': replies}

if __name__ == '__main__':
    app.run(debug=True)