#!/usr/bin/env python3
#Curious Greg - Curious Cat to Mastodon crossposter
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

import requests, json, hashlib, urllib
from mastodon import Mastodon
from flask import Flask, render_template, request, session, redirect, url_for
import mysql.connector
import bcrypt

cfg = json.load(open("meta.json"))
scopes = ["read:accounts", "write:statuses"]

db = mysql.connector.connect(user=cfg['dbuser'], password=cfg['dbpass'], database=cfg['dbname'])
c = db.cursor()
c.execute("CREATE TABLE IF NOT EXISTS `data` (username TINYTEXT NOT NULL, instance TINYTEXT NOT NULL, password TINYTEXT NOT NULL, avi TEXT NOT NULL, secret TINYTEXT NOT NULL, client_id TINYTEXT NOT NULL, client_secret TINYTEXT NOT NULL, cc TINYTEXT, latest_post TINYTEXT, latest_timestamp TIMESTAMP, time_between_checks INT)")

app = Flask(cfg['name'])
app.secret_key = cfg['flask_key']

@app.route('/')
def main():
	if 'acct' not in session:
		return render_template("landing_page.html")
	else:
		return redirect(url_for('home'))

@app.route('/home')
def home():
	if 'acct' in session:
		acct = session['acct']
		return render_template("home.html", acct=acct)
	else:
		return redirect(url_for('main'))
	

@app.route('/debug') #TODO: remove this before making the site live ;p
def print_debug_info():
	return json.dumps(session._get_current_object())

@app.route('/login')
def log_in():
	if 'acct' in session:
		#user is probably already logged in. if they aren't, home() will handle things and redirect them back here
		return redirect(url_for('home'))
	return render_template("login.html")

	# return(json.dumps(client_info))

#internal stuff

@app.route('/internal/auth_a')
def internal_auth_a(): #TODO: prevent these endpoints from being spammed somehow

	session['instance_url'] = request.args.get('instance', default='mastodon.social', type=str)
	if not session['instance_url'].startswith("https://"):
		session['instance_url'] = "https://{}".format(session['instance_url'])

	session['client_id'], session['client_secret'] = Mastodon.create_app(cfg['name'],
		api_base_url=session['instance_url'],
		scopes=scopes,
		website=cfg['website'],
		redirect_uris=['https://cg.lynnesbian.space/internal/auth_b', 'http://localhost:5000/internal/auth_b']
	)

	client = Mastodon(client_id=session['client_id'], client_secret=session['client_secret'], api_base_url=session['instance_url'])
	url = client.auth_request_url(client_id=session['client_id'], redirect_uris='http://localhost:5000/internal/auth_b', scopes=scopes)
	
	return redirect(url, code=307)

@app.route('/internal/auth_b')
def internal_auth_b():
	#write details to DB
	client = Mastodon(client_id=session['client_id'], client_secret=session['client_secret'], api_base_url=session['instance_url'])
	session['secret'] = client.log_in(code = request.args.get('code'), scopes=scopes, redirect_uri='http://localhost:5000/internal/auth_b')
	acct_info = client.account_verify_credentials()
	session['username'] = acct_info['username']
	session['avi'] = acct_info['avatar']
	session['acct'] = "@{}@{}".format(session['username'], session['instance_url'].replace("https://", ""))
	if c.execute("SELECT COUNT(*) FROM data WHERE username LIKE ? AND instance LIKE ?", (session['username'], session['instance_url'])).fetchone()[0] > 0:
		#user already has an account with CG
		return redirect(url_for('log_in'))
	else:
		return redirect(url_for('home'))

@app.route('/internal/do_login')
def do_login():
	pass

@app.route('/create_password')
def create_password():
	return render_template("create_password.html")

@app.route('/internal/create_account', methods=['POST'])
def create_account():
	pw = bcrypt.hashpw(request.form['pw'], bcrypt.gensalt(15))
	c.execute("INSERT INTO data (username, instance, avi, password, secret, client_id, client_secret) VALUES (?, ?, ?, ?, ?)", (session['username'], pw, session['instance_url'],  session['secret'], session['client_id'], session['client_secret']))
	db.commit()