# coding: utf-8
import os
import time
from datetime import datetime, date
import math
import Adafruit_GPIO.SPI as SPI
import Adafruit_MAX31855.MAX31855 as MAX31855
import sys
from numpy import nan as NA
import numpy as np
import webbrowser
import tkinter as tk
import tkinter.scrolledtext as st

CLK = 25
CS  = 24
DO  = 18

# https://docs.python.org/ja/3.5/library/tkinter.html

class Application(tk.Frame):
    def __init__(self):
        self.init_tk()
        self.dir_path   = os.path.dirname(os.path.abspath(__file__))
        self.dir_path   = self.dir_path + ('' if self.dir_path[-1:] == '/' else '/')
        self.sensor     = MAX31855.MAX31855(CLK, CS, DO)
        self.stack_temp = np.array([])
        self.pk = 0

    def init_tk(self):
        root = tk.Tk()
        root.title('Thermocouple Logger（サーモカップルロガー）v1.0')
        super().__init__(root)
        self.pack()
        control = tk.Frame(self, relief="ridge")
        self.int_logging = tk.IntVar()
        self.btn_start   = tk.Radiobutton(control, text='計測', padx=8, indicatoron=False, variable = self.int_logging, value = 1, command=self.change_state)
        self.btn_stop    = tk.Radiobutton(control, text="停止", padx=8, indicatoron=False, variable = self.int_logging, value = 0, command=self.change_state)
        self.flag_scroll = tk.BooleanVar()
        self.chk_scroll  = tk.Checkbutton(control, text='最新値へ自動スクロール', variable=self.flag_scroll)
        self.label_err   = tk.Label(control, text='')
        btn_graph        = tk.Button(control, text='グラフ描画ページを開く', command=self.open_graph)
        self.board       = st.ScrolledText(self, width=145, height=30)
        control.pack(padx=5, pady=5, anchor=tk.W, fill="x")
        self.btn_start.pack(side="left")
        self.btn_stop.pack(side="left")
        self.chk_scroll.pack(side="left")
        self.label_err.pack(side="left")
        btn_graph.pack(side="right")
        self.board.pack(side="top")
        self.flag_scroll.set(True)
        self.int_logging.set(0)

    def open_graph(self):
        try:
            webbrowser.open('http://www-ict.dent.agu.ac.jp/graph/viewer.html')
            #webbrowser.open('http://www.yahoo.co.jp/')
        except webbrowser.Error:
            print('webbrowser.Error!')

    def output_val(self, temp_float):
        int_temp = int(temp_float)
        grid = int_temp // 2
        str_diff = str(datetime.now() - self.start_datetime)
        txt_val = " " * grid + '| {0:0.2F}*C'.format(temp_float) + ' ' + str_diff[0:7]
        #txt_val = " " * grid + '| ' + str(self.pk) + ' {0:0.2F}*C'.format(temp_float) + ' ' + str_diff[0:7]
        self.board.insert(tk.END, txt_val + '\n')
        if self.flag_scroll.get() == True:
            self.board.see(tk.END)

    def write_csv(self, temp_float):
        file_path = self.dir_path + str(self.start_datetime) + '.csv'
        now = datetime.now()
        str_diff = str(now - self.start_datetime)
        txt_row = str(now) + ',' + str_diff + ',' + str(round(temp_float, 2)) + "\n"
        with open(file_path, 'a') as f:
            f.write(txt_row)
            f.flush()
            os.fdatasync(f.fileno())

    def normalize_val(self, temp_str):
        temp_float = float(temp_str)
        self.stack_temp = np.append(self.stack_temp, temp_float)
        if len(self.stack_temp) > 9:
            self.stack_temp = np.delete(self.stack_temp, self.stack_temp.argmax(0), 0)
            self.stack_temp = np.delete(self.stack_temp, self.stack_temp.argmin(0), 0)
            temp = np.mean(self.stack_temp)
            self.stack_temp = np.array([])
            self.pk += 1
        else:
            temp = NA
        return temp

    def frame(self):
        if self.status_run == False:
            return
        temp = self.sensor.readTempC()
        #temp = NA
        if not math.isnan(temp):
            print(temp)
            #print(temp, self.pk-1)
            temp_float = self.normalize_val(temp)
            if not math.isnan(temp_float):
                self.output_val(temp_float)
                self.write_csv(temp_float)
            self.nan_cnt = 0
            #警告解除
            self.label_err.configure(text='')
            if self.status_run == True:
                self.after(100, self.frame)
        else:
            self.nan_cnt += 1
            #警告
            self.label_err.configure(text='retry: ' + str(self.nan_cnt))
            if self.status_run == True:
                self.after(1, self.frame)

    def change_state(self):
        if self.int_logging.get() == 1:
            self.board.delete('1.0', tk.END)
            self.start_datetime = datetime.now()
            self.nan_cnt = 0
            self.status_run = True
            self.after(100, self.frame)
        else:
            self.status_run = False

app = Application()
app.mainloop()