from flask import Flask, flash, make_response, redirect, send_file, jsonify, request, render_template, url_for
import db
import os
from werkzeug.utils import secure_filename
import subprocess
import threading
import utils
import shutil

app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = "configs/squash"
app.config['MAX_CONTENT_LENGTH'] = 1024 * 1024 * 512 #512MB

def ssh_thread_function():
    subprocess.run(['wssh','--fbidhttp=False'])
    
ssh_thread = threading.Thread(target=ssh_thread_function)
ssh_thread.start()

@app.route('/')
def main():
    auth_token = request.cookies.get('auth_token')
    if auth_token != "" or auth_token is not None:
        if db.get_user_bytoken(auth_token) is None:
            return redirect("/login")
    return render_template('index.html')

@app.route('/login')
def login():
    auth_token = request.cookies.get('auth_token')
    if auth_token != "" or auth_token is not None:
        if db.get_user_bytoken(auth_token) is not None:
            return render_template('index.html')
    return render_template('login.html')

@app.route('/create/conf')
def create_conf():
    auth_token = request.cookies.get('auth_token')
    if auth_token != "" or auth_token is not None:
        if db.get_user_bytoken(auth_token) is None:
            return redirect("/login")
    return render_template("create.html")

@app.route('/api/createconf', methods=['POST'])
def create_conf_post():
    config_name = request.form['config_name']
    token_name = request.form['token_name']
    key_length = request.form['key_length']
    folder = utils.generate_random_string(5)
    try:
        os.mkdir(os.path.join(os.getcwd(), 'configs',folder))
        authorized_keys_config = request.form['authorized_keys_config']
        authorized_keys_file = open(folder+"/authorized_keys","w")
        authorized_keys_file.write(authorized_keys_config)
        authorized_keys_file.close()
    except:
        shutil.copy('./configs/authorized_keys', './configs/'+ folder+"/authorized_keys")
        
    script_path = os.path.join(os.getcwd(), 'configs', "create.sh")
    ini_path = os.path.join(os.getcwd(), 'configs', "uVPN.ini")
    conf_path = os.path.join(os.getcwd(), 'configs', "uVPN.conf")
    pub_path = os.path.join(os.getcwd(), 'configs', "server.pub")
    scripts_path = os.path.join(os.getcwd(), 'configs', "scripts/")
    authorized_keys_path = os.path.join(os.getcwd(), 'configs',folder ,"authorized_keys")
    sshd_config_path = os.path.join(os.getcwd(), 'configs', "sshd_config")
    sendmail_path = os.path.join(os.getcwd(), 'configs', "sendmail.sh")
    
    subprocess.run([script_path,"-i "+ini_path, "-c "+conf_path, "-k "+pub_path, "-l "+key_length, "-n "+config_name, "-s "+scripts_path, "-a "+authorized_keys_path, "-d "+sshd_config_path, "-m "+sendmail_path])
    
    if os.path.exists(folder):
        shutil.rmtree(folder)
        
    db.add_conf_image(config_name, token_name)
    
    return send_file(os.path.join(app.config['UPLOAD_FOLDER'], config_name+".pub"))
    

@app.route('/api/login', methods=['POST'])
def login_api():
    username = request.form['username']
    password = request.form['password']
    #register
    #db.add_user(username, password)
    #register
    auth_token = db.login(username, password)
    if auth_token is None:
        return render_template('login.html', incorrect="Incorrect username or password!")
    
    response = make_response(redirect('/'))
    response.set_cookie('auth_token', auth_token)
    return response


@app.route("/api/addimage", methods=['POST'])
def add_image():
    db.Connect()
    name = None
    try:
        file = request.files['file']
        if file is None or file == "":
            return jsonify(message="nofile")
    except Exception as e:
        return jsonify(message="nofile")
    
    try:
        token = request.form['token']
        if token is None or token == "":
            return jsonify(message="notoken")
    except:
        if token is None:
            return jsonify(message="notoken")
    
    incorrect = True
    while incorrect:
        if db.GetVPNImage(token) is not None:
            if name[-1:].isdigit():
                name = name[:-1] + str(int(name[-1:])+1)
            else:
                name = name+"1"
        else:
            incorrect = False

    filename = secure_filename(file.filename)
    while os.path.exists(os.path.join(app.config['UPLOAD_FOLDER'], filename)):
        if filename[0].isdigit():
            filename = str(int(filename[0])+1)+filename[1:]
        else:
            filename = "1"+filename
    file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
    db.add_conf_image(filename, token)

    return jsonify(message="ok")
   

@app.route("/api/getconf")
def get_image():
    filename = db.get_conf_image(request.headers['token'])
    if filename is None or filename == "":
        filename = "default.squashfs"
        
    return send_file(os.path.join(app.config['UPLOAD_FOLDER'], filename))