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

// Define the TFT display pins
#define TFT_CS    10
#define TFT_RST   8
#define TFT_DC    9

// Create the TFT display object
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

// Define button pins for the number pad (you'll need 12 buttons)
const int buttonPins[] = {2, 3, 4, 5, 6, 7, 11, 12, A0, A1, A2, A3}; // For 0-9 + call/end
String dialedNumber = "";  // Store the dialed number

void setup() {
  // Start serial communication for debugging
  Serial.begin(9600);
  
  // Initialize TFT screen
  tft.begin();
  
  // Set screen rotation (adjust according to your physical setup)
  tft.setRotation(3);  // Try 0, 1, 2, or 3 depending on how you want the screen to appear
  
  // Set background color to white
  tft.fillScreen(ILI9341_WHITE);  
  
  // Display the dialer UI
  drawDialer();
  
  // Initialize button pins as input
  for (int i = 0; i < 12; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
}

void loop() {
  // Check each button for a press
  for (int i = 0; i < 12; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      handleButtonPress(i);
      delay(300);  // debounce delay
    }
  }
}

void drawDialer() {
  // Display the dialer screen
  tft.setTextColor(ILI9341_BLACK);
  tft.setTextSize(3);
  tft.setCursor(10, 10);
  tft.print("Dialer: ");
  tft.setCursor(10, 40);
  tft.print(dialedNumber);  // Show dialed number
  
  // Draw number pad (simple layout)
  int x = 10, y = 100;
  for (int i = 1; i <= 9; i++) {
    if (i % 3 == 0) { x = 10; y += 50; }  // Move to next row after every 3 buttons
    drawButton(x, y, i);
    x += 60;
  }
  drawButton(10, y + 50, 0);  // Add "0" at the bottom
  drawButton(70, y + 50, 10); // Add "Call"
  drawButton(130, y + 50, 11); // Add "End"
}

void drawButton(int x, int y, int num) {
  // Draw a button on the screen
  tft.fillRect(x, y, 50, 50, ILI9341_LIGHTGREY); // Corrected color name
  tft.drawRect(x, y, 50, 50, ILI9341_BLACK);
  tft.setCursor(x + 15, y + 15);
  
  if (num == 10) {
    tft.setTextSize(2);
    tft.print("Call");
  } else if (num == 11) {
    tft.setTextSize(2);
    tft.print("End");
  } else {
    tft.setTextSize(3);
    tft.print(num);
  }
}

void handleButtonPress(int buttonIndex) {
  // Handle number or call/end button press
  if (buttonIndex >= 0 && buttonIndex <= 9) {
    dialedNumber += String(buttonIndex);
  } else if (buttonIndex == 10) {
    // Simulate a call (just display "Calling")
    tft.fillRect(10, 200, 240, 40, ILI9341_WHITE);
    tft.setCursor(10, 200);
    tft.print("Calling " + dialedNumber + "...");
  } else if (buttonIndex == 11) {
    // Simulate end of call (reset the dialer)
    dialedNumber = "";
    tft.fillRect(10, 200, 240, 40, ILI9341_WHITE);
    drawDialer();  // Redraw the dialer screen
  }
}