from flask import Flask, render_template, make_response, request, redirect, url_for, session, abort
from pprint import pprint
import mysql.connector
import configparser
import os.path

config = configparser.ConfigParser()
MOBILES = ["android", "iphone", "blackberry"]

try:
    config.read(".config")
except Exception as E:
    print(E)

def dbConnect():
    mydb = mysql.connector.connect(
    host="localhost",
    user=config["mysql"]["Username"],
    passwd=config["mysql"]["Password"],
    database=config["mysql"]["Database"]
    )
    return mydb


def doesTableExist():
    mydb = dbConnect()
    mycursor = mydb.cursor()
    mycursor.execute('''SHOW TABLES''')
    tables = mycursor.fetchall()
    if len(tables) == 0:
        mycursor.execute('''CREATE TABLE SHOPLIST (id INT AUTO_INCREMENT PRIMARY KEY, item VARCHAR(255), gotten BOOLEAN, user_id INT, FOREIGN KEY (`user_id`) REFERENCES `USERS`(`id`)
                      ON DELETE CASCADE)''')
        mycursor.execute('''CREATE TABLE USERS (id INT AUTO_INCREMENT PRIMARY KEY, username VARCHAR(255), password VARCHAR(255))''')
    mydb.close()

def runQuery(query):
    mydb = dbConnect()
    c = mydb.cursor()
    c.execute(query)
    if query.lower().startswith("select"):
        ret = c.fetchall()
    else:
        ret = []
    mydb.commit()
    mydb.close()
    return ret

def readFromDB():
    # query = '''select * from SHOPLIST'''
    query = '''select SHOPLIST.id, SHOPLIST.item, SHOPLIST.gotten, USERS.username from SHOPLIST inner join USERS on SHOPLIST.user_id = USERS.id'''
    return runQuery(query)

def insertToDB(data):
    query = f"INSERT INTO SHOPLIST (item, gotten, user_id) VALUES (\"{data['item']}\", 0, {data['name']})"
    # print(query)
    runQuery(query)


def deleteRow(rowID):
    query = f"DELETE FROM SHOPLIST WHERE id = {rowID}"
    runQuery(query)

def getItem(rowID):
    query = f"UPDATE SHOPLIST set gotten = 1 where id = {rowID}"
    runQuery(query)

def unGetItem(rowID):
    query = f"UPDATE SHOPLIST set gotten = 0 where id = {rowID}"
    runQuery(query)

def get_users(username=None):
    if username == None:
        #return all users
        query = "select username, admin, id from USERS"
        return runQuery(query)
    query = f"select username, admin from USERS where username like '{username}'"
    return runQuery(query)

def add_user(userData):
    username = userData["username"]
    password = userData["password"]
    query = f"insert into USERS (username, password, admin) values ('{username}', md5('{password}'), False)"
    runQuery(query)

def update_pass(user_id, newpass):
    query = f"update USERS set password=md5('{newpass}') where id={user_id}"
    runQuery(query)

app = Flask(__name__)
app.config["DEBUG"] = True
app.secret_key = b'*$#@U9423jr92jioJKL_)_;dasfj()12'

@app.route('/')
def index():
    if session.get('id') is None:
        data = {"title":"Login"}
        return render_template("auth.html", data=data)

    query = readFromDB()
    data = {"title": "Shopping List", "results": query, "username": session["username"]}
    for device in MOBILES:
        if device in request.user_agent.platform:
            return render_template('mobile.html', data=data)
    return render_template('index.html', data=data)

@app.route('/post', methods=['POST'])
def handle_data():
    if "addValue" in request.form:
        for x in request.form:
            if request.form[x] == '':
                return redirect(url_for('index'))
        insertToDB({"item": request.form["item"], "name": session["id"]})
    if "rem" in request.form:
        deleteRow(request.form["rem"])

    if "got" in request.form:
        getItem(request.form["got"])

    if "ungot" in request.form:
        unGetItem(request.form["ungot"])
        
    if "loginform" in request.form:
        query = "select id, username, admin from USERS where username = '%s' and password = md5('%s')" % (request.form["username"].lower(), request.form["password"])

        res = runQuery(query)
        if len(res) != 0:
            session["id"] = res[0][0]
            session["username"] = res[0][1]
            session["isAdmin"] = res[0][2]

    if "newuser" in request.form:
        #first check if the user exists
        usrCheck = get_users(request.form["username"])
        print(usrCheck)
        if len(usrCheck) != 0:
            return "Username Exists"
        userData = {"username": request.form["username"], "password": request.form["password"]}
        add_user(userData)
        return redirect(url_for("admin"))

    if "newpass" in request.form:
        user_id = request.form['updatepass']
        newpass = request.form['newpass']
        update_pass(user_id, newpass)
        return redirect(url_for("admin"))

    if "logout" in request.form:
        session.clear()
    return redirect(url_for('index'))

@app.route("/admin")
def admin():
    if session.get('id') is None:
        data = {"title":"Login"}
        return render_template("auth.html", data=data)
    elif session.get('isAdmin') == 0:
        return redirect(url_for("index"))

    #get a list of users
    userList = get_users()
    data = {"users": userList}

    return render_template("admin.html", data=data)

if __name__ == '__main__':
    doesTableExist()
    app.run(host="0.0.0.0")