#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>


#define S_BTN 5
#define C_BTN 22
#define TFT_DC 2
#define TFT_CS 15
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

int selectState = 0;
int target = 0;
int maxTarget = 100;


void setup() {
  pinMode(S_BTN, INPUT_PULLUP);
  pinMode(C_BTN, INPUT_PULLUP);

  Serial.begin(9600);
  tft.begin();
  // tft.fillScreen(ILI9341_BLACK);
  tft.setRotation(2);

}

void loop() {
  if (digitalRead(S_BTN) == LOW) {
    selectState++;
    tft.fillScreen(ILI9341_BLACK);
  }
  if (selectState == 0) {
    setPressure(target);
    if (digitalRead(C_BTN) == LOW) {
      target++;
      // setPressure(target);
      if (target == maxTarget) {
        target = 0;
      }
    }
  } else if (selectState == 1) {
    for (int i = 0; i < 101; i++) {
      int value = i / 5;
      drawLEDBarGraph(value);
      sensorText(i);
      delay(10);
    }
  }
 

}

void sensorText(int value) {
  tft.setRotation(1);
  tft.setCursor(100, 100);
  tft.setTextColor(ILI9341_WHITE, ILI9341_BLACK);
  tft.setTextSize(3);
  tft.println(value);
  if (value < 10)  
  {
    
    tft.fillRect(115, 100, 18, 24, ILI9341_BLACK);  
  }
  if (value < 100)  
  {
    
    tft.fillRect(135, 100, 18, 24, ILI9341_BLACK);  
  }
  tft.setRotation(2);
}

void drawLEDBarGraph(int value) {
  int barWidth = 10; 
  int barHeight = 40; 
  int x = 15; 
  int y = 10; 

  
  tft.drawRect(x, y - 1, (barWidth * 20) + 1, barHeight + 2, ILI9341_WHITE);

  
  for (int i = 0; i < value; i++) {
    tft.fillRect(x + (i * barWidth + 1), y + 1, barWidth - 2, barHeight - 2, ILI9341_GREEN);
  }

  
  for (int i = value; i < 20; i++) {
    tft.fillRect(x + (i * barWidth + 1), y + 1, barWidth - 2, barHeight - 2, ILI9341_BLACK);
  }
}


void setPressure(int value) {

  tft.setRotation(1);
  tft.setCursor(0, 100);
  tft.setTextSize(2);
  tft.setTextColor(ILI9341_WHITE, ILI9341_BLACK);
  tft.println("Press button to set target");
  tft.setTextSize(3);
  tft.setTextColor(ILI9341_RED, ILI9341_BLACK);
  tft.print("Target = ");
  tft.print(value);
  tft.setRotation(2);
}