//KURANG BACA DAN TULIS FILE DARI SD CARD NEXTION
//BACA DAN TULIS FILE UNIT CODE, BACA DAN TULIS FILE SECONDMETER
//KONSEPNYA MENAMBAH SECONDMETER, JADI TIDAK BERDASARKAN WAKTU START/ STOP

//YANG DIKIRIM DARI ARDUINO : STATUS KONEKSI, STATUS INPUT, UNIT CODE (REFRESH), HM
//YANG DIKIRIM DARI HMI : DATETIME, UNITCODE EDIT, HM EDIT, QR CODE, flagSave, flagPrint, flagRefresh
//TRIGGER: SAVE, REFRESH, PRINT

#include "EasyNextionLibrary.h"
#include "TimeLib.h"
#include <SPI.h>
#include <SD.h>
File hmFile, unitFile;

tmElements_t te;  //Time elements structure
time_t unixTime; // a time stamp

// SoftwareSerial mySerial(2, 3);
EasyNex myNex(Serial2);

const int REFRESH_TIME = 100;           // time to refresh the Nextion data every 1000 ms
unsigned long refresh_timer = millis();  // timer for refreshing Nextion's page
String stringFromNextion;

//RECEIVE
int nexDateTime[6];//year,month,date,hour,min,sec
String nexUnitCode, nexQR;
unsigned long nexHourmeter;
bool flagPrint = 0, flagRefresh = 0, flagSave = 0;

//hourmeter
#define pinTrigger 4
bool inputTrigger = false;
unsigned long hourMeter, secondMeter, lastUnix;

String unitName;

void setup() {
  Serial.begin(9600);
  myNex.begin(9600);

  pinMode(pinTrigger, INPUT_PULLUP);
  if (!SD.begin(53)) {
    myNex.writeStr("page 4");
    myNex.writeStr("t8.txt", "SD Card Error, Reset Device");
    Serial.println("Initialization SD CARD GAGAL");
    delay(1000);
  }
  myNex.writeStr("page 0");
  Serial.println("Initialization SD CARD OK");

  //===== INIT CONDITION =====
  hmFile = SD.open("hm.txt");
  if (hmFile) {
    Serial.println("Read Data");
    if (hmFile.available()) {
      String readFromSD = hmFile.readString();
      Serial.print(readFromSD);
      secondMeter = readFromSD.toInt();
    }
    hmFile.close();
  }
  else {
    hmFile = SD.open("hm.txt", FILE_WRITE);
    if (hmFile) {
      hmFile.println(secondMeter);
      hmFile.close();
    }
  }
  loadUnitCode();
}

void loop() {
  myNex.NextionListen();
  unsigned long thisMillis = millis();
  if ((thisMillis - refresh_timer) > REFRESH_TIME) {
    //===== READ FROM HMI =====
    nexDateTime[0] = myNex.readNumber("mainPage.xYear.val");
    nexDateTime[1] = myNex.readNumber("mainPage.xMonth.val");
    nexDateTime[2] = myNex.readNumber("mainPage.xDate.val");
    nexDateTime[3] = myNex.readNumber("mainPage.xHour.val");
    nexDateTime[4] = myNex.readNumber("mainPage.xMin.val");
    nexDateTime[5] = myNex.readNumber("mainPage.xSecond.val");
    nexQR = myNex.readStr("mainPage.g0.txt");
    flagPrint = false, flagRefresh = false, flagSave = false;
    int tempFlag = myNex.readNumber("mainPage.flagPrint.val");
    if (tempFlag > 0)flagPrint = true;
    tempFlag = myNex.readNumber("mainPage.flagRefresh.val");
    if (tempFlag > 0)flagRefresh = true;
    tempFlag = myNex.readNumber("mainPage.flagSave.val");
    if (tempFlag > 0)flagSave = true;
    //    Serial.println("===== READ FROM HMI =====");
    //    Serial.println("Date : " + String(nexDateTime[2]) + "-" + String(nexDateTime[1]) + "-" + String(nexDateTime[0]));
    //    Serial.println("Time : " + String(nexDateTime[3]) + ":" + String(nexDateTime[4]) + ":" + String(nexDateTime[5]));
    //    Serial.println("QR : " + nexQR);

    //===== PROSES =====
    te.Second = nexDateTime[5];
    te.Hour = nexDateTime[3];
    te.Minute = nexDateTime[4];
    te.Day = nexDateTime[2];
    te.Month = nexDateTime[1];
    te.Year = nexDateTime[0] - 1970;
    unixTime =  makeTime(te);
    cekInput();
    cekHMITrig();

    //===== SEND TO HMI =====
    myNex.writeNum("mainPage.b4.bco", 1024);
    if (inputTrigger == true)myNex.writeNum("mainPage.b5.bco", 1024);
    //unit code edit
    myNex.writeNum("mainPage.x0.val", hourMeter);

    //    Serial.println("===== SEND TO HMI =====");
    //    Serial.println("mainPage.b4.bco 1024");
    //    if (inputTrigger == true)Serial.println("mainPage.b5.bco 1024");
    //    Serial.println("x0.val : " + String(hourMeter));
    myNex.writeNum("mainPage.flagPrint.val", 0);
    myNex.writeNum("mainPage.flagRefresh.val", 0);
    myNex.writeNum("mainPage.flagSave.val", 0);

    //===== DEBUG =====
    //    Serial.println("===== DEBUG =====");
    //    Serial.println("UNIX : " + String(unixTime));
    //    Serial.println("LAST : " + String(lastUnix));
    Serial.println("SM : " + String(secondMeter));
    myNex.writeStr("mainPage.t13.txt", String(unixTime));
    refresh_timer = thisMillis;
  }

}

void cekInput() {
  if (unixTime != lastUnix) {
    if (digitalRead(pinTrigger) == 0) {
      secondMeter++;
      hmFile = SD.open("hm.txt", O_WRITE);
      if (hmFile) {
        hmFile.println(String(secondMeter));
        hmFile.close();
      }
      inputTrigger = true;
    }
    else {
      inputTrigger = false;
    }

    unsigned long tempHourmeter = secondMeter / 3600;
    unsigned long per10 = int((secondMeter % 3600) / 360);
    //    unsigned long tempHourmeter = secondMeter / 360;
    //    unsigned long per10 = int((secondMeter % 360) / 36);
    hourMeter = tempHourmeter * 10 + per10;
    lastUnix = unixTime;
  }
}
//4000.2 = 4000*3600 + 2*10*60 = 14.400.000 + 1200
void cekHMITrig() {
  if (flagPrint == 1)Serial.println("PRINTING...");
  if (flagRefresh == 1) {
    Serial.println("REFRESHING...");
    loadUnitCode();
    myNex.writeStr("mainPage.t8.txt", unitName);
    myNex.writeStr("mainPage.code.txt", unitName);
  }
  if (flagSave == 1) {
    Serial.println("SAVING...");
    hourMeter = myNex.readNumber("mainPage.hm.val");
    unsigned long tempHourmeter = hourMeter / 10;
    unsigned long per10 = hourMeter % 10;
    secondMeter = (tempHourmeter * 3600) + (per10*360) ;
    hmFile = SD.open("hm.txt", O_WRITE);
    if (hmFile) {
      hmFile.println(String(secondMeter));
      hmFile.close();
    }

    myNex.readStr("mainPage.code.txt");
    unitFile = SD.open("unitCode.txt", O_WRITE);
    if (unitFile) {
      unitFile.println(unitFile);
      unitFile.close();
    }
  }
}

void loadUnitCode() {
  unitFile = SD.open("unitCode.txt");
  if (unitFile) {
    Serial.println("Read Data");
    if (unitFile.available()) {
      String readFromSD = unitFile.readString();
      Serial.print(readFromSD);
      unitName = readFromSD;
    }
    unitFile.close();
  }
  else {
    unitName = "OPELIOT";
    unitFile = SD.open("unitCode.txt", FILE_WRITE);
    if (unitFile) {
      unitFile.println("OPELIOT");
      unitFile.close();
    }
  }
}