#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);



typedef struct {
  String cd;
  uint32_t t1;
  uint32_t t2;
  uint8_t p1;
  uint8_t p2;
} CodeVal;


constexpr uint8_t NUM_READS = 100;
CodeVal codeVals[NUM_READS];

char *Lables[10];

String lblRead;
uint8_t pwRead;
uint32_t tmRead;

int aryPtr = 0;
bool isNewLbl = true;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Hello... ");

  fillArray();
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(50); // this speeds up the simulation

  isNewLbl = true;
  int btn = digitalRead(4);

  if (btn == 1) {

    lblRead = Lables[random(0, 10)];
    pwRead = random(1, 10);
    tmRead = millis();

    Serial.println("lblRead=" + lblRead + " pwRead=" + pwRead + " tmRead=" + tmRead);

    LCD.setCursor(0, 1);
    LCD.print("LBL: " + lblRead);


    for (int i = 0; i < NUM_READS; i++) {

      if (codeVals[i].cd == lblRead) {

        //pw1 is max and pw0 is min
        if (pwRead < codeVals[i].p1) {

          codeVals[i].p1 = pwRead;
          codeVals[i].t1 = tmRead;

        } else if (pwRead > codeVals[i].p2) {

          codeVals[i].p2 = pwRead;
          codeVals[i].t2 = tmRead;

        }

        isNewLbl = false;
        printArray(i);
        break;
      }

    }

    if (isNewLbl) {
      aryPtr++;
      if (aryPtr > 99) {
        aryPtr = 0;
      }
      codeVals[aryPtr].cd = lblRead;
      codeVals[aryPtr].t1 = tmRead;
      codeVals[aryPtr].t2 = tmRead;

      codeVals[aryPtr].p1 = pwRead;
      codeVals[aryPtr].p2 = pwRead;
      printArray(aryPtr);
    }


  }

  delay(500);
}


void fillArray() {

  for (int i = 0; i < NUM_READS; i++) {
    codeVals[aryPtr] = {"", 0, 0, 0};
  }

  Lables[0] = "AB1";
  Lables[1] = "AB2";
  Lables[2] = "AB3";
  Lables[3] = "AB4";
  Lables[4] = "AB5";
  Lables[5] = "CD1";
  Lables[6] = "CD2";
  Lables[7] = "CD3";
  Lables[8] = "CD4";
  Lables[9] = "CD5";

}

void printArray(int idx) {
  Serial.print("idx:");
  Serial.print(idx);
  Serial.print(" code:");
  Serial.print(codeVals[idx].cd);
  Serial.print(" time0:");
  Serial.print(codeVals[idx].t1);
  Serial.print(" pw0:");
  Serial.print(codeVals[idx].p1);
  Serial.print(" time1:");
  Serial.print(codeVals[idx].t2);
  Serial.print(" pw1:");
  Serial.println(codeVals[idx].p2);
  Serial.println("------------------------------");
}