import os
from flask import Flask, redirect, render_template, request, session
import csv # CSV handling
import random
import RPi.GPIO as GPIO
import time

app = Flask(__name__)

def load_database():
    file = os.path.join(os.path.expanduser("~"), "Robotik-Ablage", "quiz.csv") 

    #with open(file, newline="", encoding="utf-8") as csvfile: #
    with open(file, newline="", encoding="cp1252") as csvfile: # Code wird als Excel Windows-1252 Input CSV gelesen
        database = csv.reader(csvfile, delimiter=";") 
        q_a = [] # Empty list for all questions and answers
        for row in database: # alle Zeilen in der Datenbank durchlaufen
            index = int(row[0]) # Laufende Nummer
            question = str(row[1]) # Frage (ist der erste Teil)
            answer = str(row[2]) # Antwort (3. Spalte in der CSV Datenbank)
            q_a.append({"index": index,"question": question, "answer": answer}) # Eine Liste bauen
        return q_a

###
# Volle Drehung sind etwa 16400     
# 1/4 Drehung = 1 Loch weiter = 4100 / evtl. 4300
ViertelRundeSteps = 4800

# ----------------- MOTOR KRAM
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
coil_A_1_pin = 24 # pink
coil_A_2_pin = 4 # orange
coil_B_1_pin = 23 # blau
coil_B_2_pin = 25 # gelb
coil2_A_1_pin = 18 # pink
coil2_A_2_pin = 22 # orange
coil2_B_1_pin = 17 # blau
coil2_B_2_pin = 27 # gelb

StepCount = 8
Seq = list(range(0, StepCount))
Seq[0] = [0,1,0,0]
Seq[1] = [0,1,0,1]
Seq[2] = [0,0,0,1]
Seq[3] = [1,0,0,1]
Seq[4] = [1,0,0,0]
Seq[5] = [1,0,1,0]
Seq[6] = [0,0,1,0]
Seq[7] = [0,1,1,0]

GPIO.setup(coil_A_1_pin, GPIO.OUT)
GPIO.setup(coil_A_2_pin, GPIO.OUT)
GPIO.setup(coil_B_1_pin, GPIO.OUT)
GPIO.setup(coil_B_2_pin, GPIO.OUT)
GPIO.setup(coil2_A_1_pin, GPIO.OUT)
GPIO.setup(coil2_A_2_pin, GPIO.OUT)
GPIO.setup(coil2_B_1_pin, GPIO.OUT)
GPIO.setup(coil2_B_2_pin, GPIO.OUT)

def setStep(w1, w2, w3, w4):
    GPIO.output(coil_A_1_pin, w1)
    GPIO.output(coil2_A_1_pin, w1)
    GPIO.output(coil_A_2_pin, w2)
    GPIO.output(coil2_A_2_pin, w2)
    GPIO.output(coil_B_1_pin, w3)
    GPIO.output(coil2_B_1_pin, w3)
    GPIO.output(coil_B_2_pin, w4)
    GPIO.output(coil2_B_2_pin, w4)

def forward(delay, steps):
    for i in range(steps):
        for j in range(StepCount):
            setStep(Seq[j][0], Seq[j][1], Seq[j][2], Seq[j][3])
            time.sleep(delay)

def backwards(delay, steps):
    for i in range(steps):
        for j in reversed(range(StepCount)):
            setStep(Seq[j][0], Seq[j][1], Seq[j][2], Seq[j][3])
            time.sleep(delay)

# ----------------- MOTOR KRAM ENDE

def FahreMotor():
    #forward(1.0/1000.0, ViertelRundeSteps)
    # falls auf der anderen Seite montiert: 
    backwards(1.0/1000.0, ViertelRundeSteps)
    return True

fragen_liste = load_database()
random.shuffle(fragen_liste)

current_index = 0
correct_sum = 0
last_correct = None
max_correct_sum = 5
debugtxt=""
alerttxt=""
successtxt=""
won=False

@app.route('/')

def quiz():
    return render_template('quiz.html', frage=fragen_liste[current_index],
                           last_correct=last_correct,debugtxt=debugtxt, correct_sum=correct_sum,
                           max_correct_sum = max_correct_sum,
                           alerttxt=alerttxt, successtxt=successtxt,
                           won=won)

@app.route('/submit_quiz', methods=['POST'])
def submit_quiz():
    global current_index
    global fragen_liste
    global debugtxt, alerttxt, successtxt
    global correct_sum
    global won

    won=False

    # Überprüfen Sie die Antwort und aktualisieren Sie current_index
    user_answer = request.form.get('answer')
    correct_answer = fragen_liste[current_index]['answer']

    if user_answer.strip() == correct_answer.strip():
        last_correct = True
        correct_sum += 1
#        debugtxt = correct_answer + " ist richtig! passt zu deiner Angabe: " + user_answer
        successtxt = correct_answer + " ist richtig! passt zu deiner Angabe: " + user_answer
        alerttxt = ""
    elif user_answer == "42": 
        # EASTEREGG!!! #
        last_correct = True
        correct_sum = 5
        successtxt = "Korrekt! Die Antwort auf alle Fragen ist 42."
        alerttxt = ""
    else: 
        last_correct = False
        alerttxt = "falsch: Richtig wäre " +correct_answer + " / und nicht: " + user_answer
        successtxt = ""
        correct_sum = 0

    current_index += 1

    # Überprüfen, ob wir alle Fragen beantwortet haben
    if current_index >= len(fragen_liste):
        fragen_liste = load_database()
        random.shuffle(fragen_liste)
        current_index=0

    if correct_sum >= 5: 
        fragen_liste = load_database()
        random.shuffle(fragen_liste)
        current_index=0
        successtxt += "<br /> <br /> <br /> Gewonnen! - Gut gemacht! <br /> Guten Appetit!"
#        print ("gewonnen! - Fahre 10 Sek!")
        FahreMotor()
        correct_sum =0
        won = True

    return redirect('/')