#include <Adafruit_GFX.h>    // Core graphics library
#include <SPI.h>             // this is needed for display
#include <Adafruit_ILI9341.h>
#include <Arduino.h>         // this is needed for FT6206
#include <Adafruit_FT6206.h>

// The FT6206 uses hardware I2C (SCL/SDA)
Adafruit_FT6206 ctp = Adafruit_FT6206();

// Define TFT pins for ESP32
#define TFT_DC 2
#define TFT_CS 15
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

// Button dimensions and position
#define BUTTON_X 100
#define BUTTON_Y 100
#define BUTTON_W 100
#define BUTTON_H 50

// LED pin
#define LED_PIN 19

void setup(void) {
  Serial.begin(115200);
  Serial.println(F("Cap Touch Button Example"));

  // Initialize the TFT and touchscreen
  Wire.setPins(10, 8); // Redefine first I2C port to be on pins 10/8
  tft.begin();

  if (!ctp.begin(40)) {  // Pass in 'sensitivity' coefficient
    Serial.println("Couldn't start FT6206 touchscreen controller");
    while (1);
  }

  Serial.println("Capacitive touchscreen started");

  // Set up the TFT display
  tft.fillScreen(ILI9341_BLACK);

  // Draw the button
  tft.fillRect(BUTTON_X, BUTTON_Y, BUTTON_W, BUTTON_H, ILI9341_WHITE);
  tft.setCursor(BUTTON_X + 20, BUTTON_Y + 15);
  tft.setTextColor(ILI9341_BLACK);
  tft.setTextSize(2);
  tft.println("Press");

  // Set up the LED pin
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW); // Ensure the LED is off initially
}

void loop() {
  // Wait for a touch
  if (!ctp.touched()) {
    return;
  }

  // Retrieve a point
  TS_Point p = ctp.getPoint();

  // Map touch points to screen coordinates
  p.x = map(p.x, 0, 240, 240, 0);
  p.y = map(p.y, 0, 320, 320, 0);

  // Check if the touch is within the button area
  if ((p.x >= BUTTON_X && p.x <= BUTTON_X + BUTTON_W) && (p.y >= BUTTON_Y && p.y <= BUTTON_Y + BUTTON_H)) {
    // Turn on the LED
    digitalWrite(LED_PIN, HIGH);
    // Print to serial monitor
    Serial.println("Button pressed");

    // Optional: Provide visual feedback on the button press
    tft.fillRect(BUTTON_X, BUTTON_Y, BUTTON_W, BUTTON_H, ILI9341_GREEN);
    tft.setCursor(BUTTON_X + 20, BUTTON_Y + 15);
    tft.setTextColor(ILI9341_WHITE);
    tft.println("Press");
    delay(200); // Debounce delay

    // Reset the button to original color
    tft.fillRect(BUTTON_X, BUTTON_Y, BUTTON_W, BUTTON_H, ILI9341_WHITE);
    tft.setCursor(BUTTON_X + 20, BUTTON_Y + 15);
    tft.setTextColor(ILI9341_BLACK);
    tft.println("Press");

    // Turn off the LED after the visual feedback
    digitalWrite(LED_PIN, LOW);
  }
}