#!/usr/bin/env python3

# Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.

# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

import tkinter as tk
import os
import sys

buttons = {}
defaultBg = None

def setWeight(weight):
    def doSet(event):
        os.chdir("/home/pi/davinci/engines")
        if os.access("maia-weights.pb", os.F_OK):
            os.remove("maia-weights.pb")
        filename = "/home/pi/maia-weights/maia-" + str(weight) + ".pb"
        os.symlink(filename, "maia-weights.pb")
        updateColors()
    def noOp(event):
        updateColors()
        return
    if weight < 1100 or weight > 1900 or weight % 100 != 0:
        return noOp
    return doSet

def exitProgram():
    def doExit(event):
        sys.exit(0)
    return doExit

def updateColors():
    os.chdir("/home/pi/davinci/engines")
    currWeight = 0
    if os.access("maia-weights.pb", os.F_OK):
        linkPath = os.readlink("maia-weights.pb")
        weight = linkPath[-7:-3]
        currWeight = int(weight)
    for i in buttons:
        if i != currWeight:
            buttons[i].configure(bg=defaultBg)
        else:
            buttons[i].configure(bg='LightGreen')

def setupWindow():
    root = tk.Tk()
    global defaultBg
    global buttons
    for i in range(9):
        button = tk.Button(text=str(i*100+1100), font=("Helvetica", 44), activebackground="LightGreen")
        row = 0
        col = i
        if i > 4:
            col -= 5
            row = 1
        buttons[i*100+1100] = button
        button.bind("<Button-1>", setWeight(i*100+1100))
        button.grid(row=row, column=col)
    button = tk.Button(text="Exit", font=("Helvetica", 44), activebackground="Red")
    defaultBg = button['bg']
    button.bind("<Button-1>", exitProgram())
    button.grid(row=1,column=4)
    updateColors()
    root.mainloop()

if __name__ == "__main__":
    setupWindow()