from machine import Pin
import time

# Keypad Layout 4x4
KEYS = [
    ['1', '2', '3', 'A'],
    ['4', '5', '6', 'B'],
    ['7', '8', '9', 'C'],
    ['*', '0', '#', 'D']
]

# GPIO-Pins (anpassen wenn nötig)
row_pins = [Pin(i, Pin.OUT) for i in (2, 3, 4, 5)]
col_pins = [Pin(i, Pin.IN, Pin.PULL_DOWN) for i in (6, 7, 8, 9)]

# Passwortliste (deine vorgegebenen Codes)
password_list = ["6737", "2468", "4561", "8197", "7452","8373"]
password_index = 0  # Start bei erstem Passwort
current_password = password_list[password_index]
input_password = ""

def scan_keypad():
    global input_password, current_password, password_index

    for row_idx, row in enumerate(row_pins):
        row.high()
        for col_idx, col in enumerate(col_pins):
            if col.value():
                key = KEYS[row_idx][col_idx]
                print("Taste gedrückt:", key)
                time.sleep(0.3)

                if key == '#':
                    print("Eingabe abgeschlossen:", input_password)
                    if input_password == current_password:
                        print("Zugriff erlaubt für Passwort:", current_password)
                        password_index += 1
                        if password_index < len(password_list):
                            current_password = password_list[password_index]
                            print("Neues Passwort gesetzt:", current_password)
                        else:
                            print("Keine weiteren Passwörter – Ende der Liste!")
                            # Optional: stoppen oder Passwort wiederholen
                            password_index = 0
                            current_password = password_list[password_index]
                            print("Zurück zum ersten Passwort:", current_password)
                    else:
                        print("Falsches Passwort!")
                    input_password = ""

                elif key == '*':
                    input_password = input_password[:-1]
                    print("Zeichen gelöscht")

                elif key in '0123456789':
                    input_password += key
                    print("Eingabe:", input_password)
        row.low()

# Startinfo
print("System bereit – aktuelles Passwort:", current_password)

# Hauptloop
while True:
    scan_keypad()