#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

#define TFT_DC 9
#define TFT_CS 10

Adafruit_ILI9341 myScreen = Adafruit_ILI9341(TFT_CS, TFT_DC);
constexpr int pbRight = 5;
constexpr int pbUp    = 6;
constexpr int pbDown  = 7;


void setup() {
  Serial.begin(9600);
  Serial.println("Test");
  pinMode(pbRight, INPUT_PULLUP);
  pinMode(pbUp, INPUT_PULLUP);
  pinMode(pbDown, INPUT_PULLUP);
  myScreen.begin();
  myScreen.setTextColor(ILI9341_RED);
  myScreen.setTextSize(2);
  myScreen.setRotation(3);
  setRain1Timer();
}

void loop(void) {
}

void setRain1Timer() {
  int rainHr = 0;
  int rainMin = 0;
  int rainTime = 0;
  myScreen.fillScreen(ILI9341_BLACK);
  myScreen.setCursor(0, 0);
  myScreen.print("Rain Time 1:");
  myScreen.setCursor(0, 20);
  myScreen.print("ENTER ON TIME");
  int inputGiven = 0;
  while (inputGiven < 4) {
    switch (inputGiven) {
      case 0 : if (getInput("Hr  ", 200, 20, rainHr, 24) == true) {
          inputGiven = 1;
        };
        break;
      case 1 : if (getInput("Min ", 200, 40, rainMin, 60) == true) {
          inputGiven = 2;
        };
        break;
      case 2 : if (getInput("Sec ", 200, 60, rainTime, 60) == true) {
          inputGiven = 3;
        };
        break;
      case 3 : // Write all data to EEPROM here
          Serial.println("Write data to EEPROM");
          inputGiven = 4;
          break;
        }
  }
  // Read and print data from EEPROM here
  Serial.println("Read and print data from EEPROM");
  printData(rainHr,rainMin,rainTime);

}


boolean getInput(String txt, int x, int y, int &data, int maxValue) {
  static unsigned long lastPrint = 0;
  static unsigned long lastChange = 0;
  static int oldData = 0;
  static String oldText = "";
  // Assuming that only one button is pressed at a time!!!
  boolean Up    = joyButtonRead(pbUp);
  boolean Down  = joyButtonRead(pbDown);
  boolean Right = joyButtonRead(pbRight);
  if (millis() - lastPrint > 200) {
    lastPrint = millis();
    if (oldData != data || oldText != txt ) {
      myScreen.setTextColor(ILI9341_BLACK);
      myScreen.setCursor(x, y);
      myScreen.print(oldText);
      myScreen.print(oldData);
      oldData = data;
      oldText = txt;
    } 
    myScreen.setTextColor(ILI9341_RED);
    myScreen.setCursor(x, y);
    myScreen.print(txt);
    myScreen.print(data);
  }
  if (millis() - lastChange > 200) {
    if (Up)  {
      lastChange = millis();
      data++;
      if (data > maxValue) {
        data = 0;
      }
    }  
    if (Down)  {
      lastChange = millis();
      data--;
      if (data < 0) {
        data = maxValue-1;
      }
    }
    if (Right) {
      lastChange = millis();
      return true;
    }  
  }
  return false;
}

boolean joyButtonRead(int pin) {
  // To make it easy for me I removed the "bounce" option of the buttons in Wokwi ;-)
  return !digitalRead(pin);
}

void printData(int hr, int mi, int se){
      myScreen.fillScreen(ILI9341_BLACK);
      myScreen.setCursor(10, 30);
      myScreen.print(" START TIME SET ");
      myScreen.setCursor(10, 50);
      myScreen.print("AT: ");
      myScreen.print(hr);
      myScreen.print(":");
      myScreen.print(mi);
      myScreen.print(":00");
      myScreen.print("     ");
      myScreen.setCursor(10, 70);
      myScreen.print("DURATION: ");
      myScreen.print(se);
      myScreen.print(" SECONDS");
      myScreen.setCursor(10, 90);
      myScreen.print("SAVED");
  }