#!/usr/bin/env python3
__author__ = 'progamler'

import curses
import datetime
from sqlalchemy import Table, Column, Integer, String, MetaData, ForeignKey, create_engine, Date, func
from sqlalchemy.sql import select



# Config foo

db_uri = 'sqlite:///./db.sqlite'

#produkte = Table('produkte', metadata,
#   Column('barcode', Integer, primary_key=True),
#   Column('name', String(40)),
#    Column('preis', Integer),)


def create_db():
    db = create_engine(db_uri)
    metadata = MetaData()
    produkte = Table('produkte', metadata,
                     Column('barcode', Integer, primary_key=True),
                     Column('name', String(40)),
                     Column('preis', Integer), )
    user = Table('user', metadata,
                 Column('barcode', Integer, primary_key=True),
                 Column('name', String(40)), )
    transaktion = Table('transaktion', metadata,
                        Column('id', Integer, primary_key=True),
                        Column('produkt', Integer, ForeignKey('produkte.barcode')),
                        Column('user', Integer, ForeignKey('user.barcode')),
                        Column('time', Date, server_default=func.now()), sqlite_autoincrement=True)

    metadata.create_all(db)

    i = produkte.insert()
    db.execute(i, name='Wasser', preis=0.5, barcode='42600370288')
    db.execute(i, name='Over 9000', preis=9000.01, barcode='2')
    db.execute(i, name='l33t', preis=1337, barcode='3')
    db.execute(i, name='Clubmate 0.5', preis=1.5, barcode='4029764001807')

    u = user.insert()
    db.execute(u, barcode='23', name='proGamler')


def return_price(produkt):
    db = create_engine(db_uri)
    metadata = MetaData(db)
    metadata.reflect()

    produkte = Table('produkte', metadata, autoload=True)
    s = select(['name', 'preis', 'barcode']).where(produkte.c.barcode == produkt)

    result = db.execute(s)
    return result.fetchone()


def isproduct(code):
    foo = return_price(code)
    try:
        print(foo.name)
        return True
    except:
        return False


def user(code):
    db = create_engine(db_uri)
    metadata = MetaData(db)
    metadata.reflect()

    user = Table('user', metadata, autoload=True)
    s = select(['name', 'barcode']).where(user.c.barcode == code)

    result = db.execute(s)
    x = result.fetchone()

    return x


def isuser(code):
    name = user(code)
    try:
        print(name.name)
        return True
    except:
        return False


def logout(x):
    if x == 666:
        return True
    else:
        return False


def count(date):
    db = create_engine(db_uri)
    metadata = MetaData(db)
    metadata.reflect()

    trans = Table('transaktion', metadata, autoload=True)
    user = Table('transaktion', metadata, autoload=True)

    current_time = datetime.timedelta(weeks=date)
    s = select(['id','user']).where(trans.c.time > current_time)
    result = db.execute(s)

    for a in result:
        print(a)


if __name__ == "__main__":
    x = 0
    name = ''
    list = []
    userbarcode = ''
    while x != int('01'):
        screen = curses.initscr()

        screen.clear()
        screen.border(0)
        screen.addstr(2, 2, "Please Scan Code")
        screen.refresh()
        if x != 0:
            if isproduct(x):
                pro = return_price(x)
                screen.addstr(4, 4, pro.name)
                list.append(x)
            elif isuser(x):
                foo = user(x)
                name = foo.name
                userbarcode = foo.barcode
                screen.addstr(4, 4, "Du wurdest eingeloggt")
            elif logout(x):
                if userbarcode:
                    db = create_engine(db_uri)
                    metadata = MetaData(db)
                    metadata.reflect()

                    trans = Table('transaktion', metadata, autoload=True)
                    trans_o = trans.insert()

                    for a in list:
                        foo = return_price(a)

                        db.execute(trans_o,
                                   produkt=foo.barcode,
                                   user=userbarcode
                        )
                name = ''
                list = []

        screen.addstr(2, 30, name)
        preis = 0
        y = 6
        for a in list:
            foo = return_price(a)
            screen.addstr(y, 30, str(foo.preis))
            screen.addstr(y, 4, foo.name)
            y = y + 1
            preis = preis + foo.preis
        screen.addstr(y + 1, 4, "----------------------------------------------")
        screen.addstr(y + 2, 4, "Gesamtsumme:")
        screen.addstr(y + 2, 30, str(preis))

        k = screen.getstr(3, 3, 60).decode('utf-8').rstrip()
        try:
            x = int(k)
        except:
            x = 0

    curses.endwin()