#!/usr/bin/env python
# -*- coding: utf-8 -*-

#TODO: beautify code

from matplotlib.backends.backend_tkagg import (
    FigureCanvasTkAgg)
from tkinter import *
import math
import matplotlib.pyplot as plt
import numpy as np


master = Tk()
master.title('dT-FanControl')

s_min_var = IntVar()
s_max_var = IntVar()
s_slope_var = DoubleVar()
s_attack_var = DoubleVar()

s_min_var.set(1)
s_max_var.set(89)
s_slope_var.set(-0.43)
s_attack_var.set(5.71)

x = np.arange(0., 35., 0.2)


def sigmoid(val):
    smin = s_min_var.get()
    smax = s_max_var.get()
    slope = s_slope_var.get()
    attack = s_attack_var.get()

    a = []
    for item in val:
        a.append(smax * ((1 - (smin / smax)) / (1 + math.exp(slope * item + attack)) + (smin / smax)))
    return a


def update_slider_labels(val):
    s_min_label.config(text='min %: ' + str(s_min_var.get()))
    s_max_label.config(text='max %: ' + str(s_max_var.get()))
    s_slope_label.config(text='slope: ' + str(s_slope_var.get()))
    s_attack_label.config(text='attack: ' + str(s_attack_var.get()))
    draw_function()


def draw_function():
    if fig:
        fig.clear()

    sig = sigmoid(x)

    ax.set_ylim([-5, 105])
    ax.set_xlim([0, 30])
    ax.set_ylabel("% PWM")
    ax.set_xlabel("delta Temperature")
    ax.set_title('Resulting Sigmoid Function')
    ax.grid()
    ax.plot(x, sig)

    fig.add_subplot(ax)
    fig.subplots_adjust(bottom=0.15)
    canvas.draw()


def reset_values():
    s_min_var.set(1)
    s_max_var.set(89)
    s_slope_var.set(-0.43)
    s_attack_var.set(5.71)
    update_slider_labels(None)


def send_values():
    #TODO: Serial connection to Arduino à la command;min,max,slope.attack eg: x;20;80;-0.4;6.2
    #TODO Arduino parse incoming serial (Ambient_Temp, H2O_Temp, PWM%)
    pass


s_min_label = Label(master, bg='white', fg='black', width=20, text='min %: ' + str(s_min_var.get()))
s_max_label = Label(master, bg='white', fg='black', width=20, text='max %: ' + str(s_max_var.get()))
s_slope_label = Label(master, bg='white', fg='black', width=20, text='slope: ' + str(s_slope_var.get()))
s_attack_label = Label(master, bg='white', fg='black', width=20, text='attack: ' + str(s_attack_var.get()))

s_min_scale = Scale(master, from_=0, to=20, orient=HORIZONTAL, length=255, showvalue=0,
                    resolution=0.01, command=update_slider_labels, variable=s_min_var)
s_max_scale = Scale(master, from_=50, to=100, orient=HORIZONTAL, length=255, showvalue=0,
                    resolution=0.01, command=update_slider_labels, variable=s_max_var)
s_slope_scale = Scale(master, from_=-1, to=-0.2, orient=HORIZONTAL, length=255, showvalue=0,
                      resolution=0.01, command=update_slider_labels, variable=s_slope_var)
s_attack_scale = Scale(master, from_=3, to=7, orient=HORIZONTAL, length=255, showvalue=0,
                       resolution=0.01, command=update_slider_labels, variable=s_attack_var)


s_min_label.grid(row=0, column=0)
s_min_scale.grid(row=0, column=1)
s_min_scale.set(s_min_var.get())

s_max_label.grid(row=1, column=0)
s_max_scale.grid(row=1, column=1)
s_max_scale.set(s_max_var.get())

s_slope_label.grid(row=2, column=0)
s_slope_scale.grid(row=2, column=1)
s_slope_scale.set(s_slope_var.get())

s_attack_label.grid(row=3, column=0)
s_attack_scale.grid(row=3, column=1)
s_attack_scale.set(s_attack_var.get())

resetButton = Button(master, text="Reset to default", command=reset_values, width=20)
resetButton.grid(row=4, column=0)

sendButton = Button(master, text="Send to Arduino", command=send_values, width=35)
sendButton.grid(row=4, column=1)

fig = plt.Figure(figsize=(5, 3), dpi=100)
ax = plt.Subplot(fig, 111)
fig.add_subplot(ax)


canvas = FigureCanvasTkAgg(fig, master)  # A tk.DrawingArea.
canvas.get_tk_widget().grid(row=5, columnspan=2)

draw_function()

master.mainloop()