#include<Arduino.h>      // this is needed for FT6206
#include<U8g2_for_Adafruit_GFX.h>
#include <Wire.h>
#include<Adafruit_ILI9341.h>
#include<Adafruit_FT6206.h>
#include<SPI.h>


// // The display also uses hardware SPI, plus #9 & #10
 /*#define TFT_CS 10
 #define TFT_DC 9*/
#define TFT_DC 2
#define TFT_CS 15
#define TFT_RST 4
//Adafruit_HX8357 tft = Adafruit_HX8357(TFT_CS, TFT_DC, TFT_RST);

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
Adafruit_FT6206 ts = Adafruit_FT6206();

int hour = 12;     // Initial hour
int minute = 30;   // Initial minute

void setup() {
  Serial.begin(115200);
  
  // Initialize TFT
  tft.begin();
  //tft.setRotation(1);
  
  // Initialize Touchscreen
  if (!ts.begin(40)) {  // Sensitivity threshold
    Serial.println("Touchscreen not found!");
    while (1);
  }

  drawUI();  // Initial display of UI
}

void loop() {
  //if (ts.touched()) {
    TS_Point p = ts.getPoint();
    
    // Map touch coordinates to screen dimensions
    p.x = map(p.x, 0, 240, 0, tft.width());
    p.y = map(p.y, 0, 320, 0, tft.height());

    // Debug: Print touch coordinates to Serial Monitor
    Serial.print("Touch X: "); Serial.print(p.x);
    Serial.print(" | Touch Y: "); Serial.println(p.y);

    // Handle touch
    handleTouch(p.x, p.y);
  //}
}

// Draw the initial UI for hour and minute
void drawUI() {
  tft.fillScreen(ILI9341_BLACK);
  
  // Display "Hour + Minute" label
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(2);
  tft.setCursor(20, 40);
  tft.print("Hour + Minute");

  // Draw + and - buttons for hour
  drawButton(20, 80, "+ Hour", ILI9341_GREEN);
  drawButton(20, 160, "- Hour", ILI9341_RED);

  // Draw + and - buttons for minute
  drawButton(150, 80, "+ Min", ILI9341_GREEN);
  drawButton(150, 160, "- Min", ILI9341_RED);

  // Show current time values
  updateTimeDisplay();
}

// Draw buttons for + and -
void drawButton(int x, int y, const char* label, uint16_t color) {
  tft.fillRoundRect(x, y, 100, 60, 10, color);  // Button background with rounded corners
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(2);
  tft.setCursor(x + 20, y + 15);  // Adjust cursor position for centering
  tft.print(label);
}

// Update the display for hour and minute
void updateTimeDisplay() {
  // Clear previous time values
  tft.fillRect(100, 240, 120, 40, ILI9341_BLACK);  // Clear time display area

  tft.setTextColor(ILI9341_CYAN);  // Change text color for current time display
  tft.setTextSize(3);
  
  // Display current hour
  tft.setCursor(100, 240);
  tft.print(hour);

  // Display colon
  tft.setCursor(140, 240);
  tft.print(":");

  // Display current minute
  tft.setCursor(160, 240);
  if (minute < 10) {
    tft.print("0");  // Add leading zero if needed
  }
  tft.print(minute);
}

// Handle touch input and adjust hour and minute
void handleTouch(int x, int y) {
  // Increase hour when + Hour is pressed
  if (x > 20 && x < 120 && y > 80 && y < 140) {
    incrementHour();
    updateTimeDisplay();
    drawUI(); // Redraw the UI after incrementing hour
  }
  
  // Decrease hour when - Hour is pressed
  if (x > 20 && x < 120 && y > 160 && y < 220) {
    decrementHour();
    updateTimeDisplay();
    drawUI(); // Redraw the UI after decrementing hour
  }

  // Increase minute when + Min is pressed
  if (x > 150 && x < 250 && y > 80 && y < 140) {
    incrementMinute();
    updateTimeDisplay();
    drawUI(); // Redraw the UI after incrementing minute
  }

  // Decrease minute when - Min is pressed
  if (x > 150 && x < 250 && y > 160 && y < 220) {
    decrementMinute();
    updateTimeDisplay();
    drawUI(); // Redraw the UI after decrementing minute
  }
}

// Function to increment hour
void incrementHour() {
  hour++;
  if (hour >= 24) {
    hour = 0;  // Reset to 0 after 23
  }
}

// Function to decrement hour
void decrementHour() {
  if (hour == 0) {
    hour = 23;  // Reset to 23 if going below 0
  } else {
    hour--;
  }
}

// Function to increment minute
void incrementMinute() {
  minute++;
  if (minute >= 60) {
    minute = 0;  // Reset to 0 after 59
    incrementHour();  // Increment hour if minute resets
  }
}

// Function to decrement minute
void decrementMinute() {
  if (minute == 0) {
    minute = 59;  // Reset to 59 if going below 0
    decrementHour();  // Decrement hour if minute resets
  } else {
    minute--;
  }
}