import tkinter as tk
import tkinter.ttk as ttk
import serial.tools.list_ports

command = []

ports = serial.tools.list_ports.comports()
serialObj = serial.Serial()

def serial_ports():
    return serial.tools.list_ports.comports()

def on_select(event=None):
    serialObj.port = cb.get().split(' ')[0]
    serialObj.baudrate = 9600
    serialObj.open()

root = tk.Tk()
#configue root
root.title("Jfs Besta")
root.geometry('800x500+300+300')
root.columnconfigure(0,weight=1)
root.rowconfigure(1,weight=1)
port = tk.IntVar()

cb =ttk.Combobox(root,values=serial_ports())
cb.grid(row=0,column=0,stick="nwe")
cb.bind('<<ComboboxSelected>>',on_select)

scb =tk.Scrollbar(root)
scb.grid(row=1,column=1,sticky='ns')
txt = tk.Text(root)
txt.grid(row=1,column=0,sticky='ewns')
scb.config(command=txt.yview)
txt.config(yscrollcommand=scb.set)
txt.tag_configure('small',font=('Verdana',8),foreground='black')

portlbl = ttk.Label(root,textvariable=port,background='grey',font='none 24 bold')
portlbl.config(anchor=tk.CENTER)
portlbl.grid(row=0,column=2,sticky='nsew')

left = ttk.LabelFrame(root,text='Commands')
left.grid(row=1,column=2,sticky='ne')

class Callback:
    def __init__(self,func,*args,**kwargs):
            self.func=func
            self.args=args
            self.kwargs=kwargs
    def __call__(self):
        self.func(*self.args,**self.kwargs)

def default_callback(i):
        cmd = [0x2A,0x01,0x01,0x00,0x02]
        cmd[2] = i
        cmd[4] = i+1
        command.append(cmd)
        command.append( [0x2A,0x01,90,0x00,91])     #get position

for i in range(1,7):
    btn = ttk.Button(left,text = f'Goto {i}',command=Callback(default_callback,i))
    btn.grid(row=i-1,column=2)

ttk.Button(left,text='up',command=Callback(default_callback,70)).grid(row=8,column=2)
ttk.Button(left,text='down',command=Callback(default_callback,71)).grid(row=9,column=2)
ttk.Button(left,text='Position',command=Callback(default_callback,90)).grid(row=10,column=2)
ttk.Button(left,text='Aus',command=Callback(default_callback,76)).grid(row=11,column=2)

def checkcommand(x):
    i = x[2]
    if i<=6:
        return f'Goto Port {i} ->'
    if i==70:
        return 'up ->'
    if i==71:
        return 'down ->'
    if i==90:
        return 'Position :'
    if i==76:
        return 'Ausschalten '

def checkdone(x):
    i = x[2]
    if i == 255:
         return "."
    if i == 250:
        return "Falscher Befehl\n"
    if i == 245:
        return "Gerät in Störung\n"
    if i <= 6:
        port.set(i)
        return f' {i} \n'

weiter = True
def checkSerialPort():
    global weiter
    if serialObj.isOpen() and serialObj.in_waiting:
       inp = serialObj.read(size=4)
       txt.insert(tk.END,checkdone(inp))
       weiter = True
    if  (len(command) > 0) & (weiter==True) :
        if serialObj.isOpen() :
            x = command.pop(0)
            txt.insert(tk.END,checkcommand(x),'small')
            serialObj.write(bytes(x))
            weiter=False
        else :
            txt.insert('0.1','Kein Port geöffnet !!!\n')
            x = command.clear()      

while True:
    root.update()
    checkSerialPort()