# Created 2019-09-10 by NGnius
from flask import Flask, Blueprint, jsonify, request
import sqlite3 as dblib
from hashlib import sha512
from os import getcwd
from threading import get_ident
from time import time

database_path = "rxsm-update.db"

database_connections = dict()
app = Flask("rxsm-update-server")

def get_or_create_connection():
    global database_connections, database_path
    thread_id = get_ident()
    if thread_id not in database_connections:
        database_connections[thread_id] = dblib.connect(database_path)
    return database_connections[thread_id]

@app.route('/release', methods=['POST'])
def create_or_modify_release():
    try:
        req_json = request.get_json(force=True)
        token = req_json['token']
        version = req_json['version']
        url = req_json['url']
    except:
        return jsonify({'status':400, 'reason':'Invalid request; missing parameter or invalid JSON'}), 400

    with open(".token", "r") as f:
        master_token = f.read()
    if sha512(token.encode()).hexdigest() != master_token:
        return jsonify({'status':403, 'reason':'Permission denied; invalid token'}), 403

    db_connection = get_or_create_connection()
    cursor = db_connection.cursor()
    cursor.execute("SELECT version FROM releases WHERE version=?", (version,))
    result = cursor.fetchone()
    operation = ""
    if result is None:
        cursor.execute("INSERT INTO releases (version, url, created_date) VALUES (?,?,?)", (version, url, int(time())))
        operation = "create"
    else:
        cursor.execute("UPDATE releases SET url=?, created_date=? WHERE version=?", (url, int(time()), version))
        operation = "update"
    db_connection.commit()

    return jsonify({'status':200, 'reason':'Version %s %sd successfully' % (version, operation)}), 200

# always try to create db table(s)
conn = get_or_create_connection()
cursor = conn.cursor()
cursor.execute(\
    """CREATE TABLE IF NOT EXISTS releases (
    id INTEGER PRIMARY KEY,
    version TEXT UNIQUE NOT NULL,
    url TEXT NOT NULL,
    created_date INTEGER NOT NULL
    )""" )
conn.commit()

if __name__ == '__main__':
    print("Working directory: " + getcwd())
    app.run(host='0.0.0.0', port=9080, threaded=True)