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

// Software SPI pins (matching your circuit)
#define TFT_CS    6
#define TFT_RST   7
#define TFT_DC    8
#define TFT_MOSI  9
#define TFT_MISO  11  // MISO on pin 11
#define TFT_SCLK  10  // SCK on pin 10

// Create display object with software SPI
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST, TFT_MISO);

// Other pins
#define PIR_PIN     3
#define BUZZER_PIN  2
#define RED_LED     4
#define GREEN_LED   5

bool motionDetected = false;
unsigned long lastMotionTime = 0;

void setup() {
  Serial.begin(9600);
  Serial.println("Starting System...");
  
  // Initialize pins
  pinMode(PIR_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(RED_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);
  
  // Turn off all outputs initially
  digitalWrite(RED_LED, LOW);
  digitalWrite(GREEN_LED, LOW);
  digitalWrite(BUZZER_PIN, LOW);
  
  // Initialize TFT
  Serial.println("Initializing TFT...");
  tft.begin();
  
  // Test if display is working by drawing something
  tft.setRotation(3);  // Try different rotations: 0, 1, 2, 3
  tft.fillScreen(ILI9341_BLACK);
  
  // Test display with simple shapes
  tft.fillRect(0, 0, 320, 40, ILI9341_RED);
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(2);
  tft.setCursor(20, 10);
  tft.println("Security System");
  
  delay(2000);
  
  // Draw main interface
  drawInterface();
  
  Serial.println("System Ready!");
}

void loop() {
  unsigned long currentTime = millis();
  
  // Read PIR sensor
  int pirState = digitalRead(PIR_PIN);
  
  // Motion detection with debounce
  if (pirState == HIGH && !motionDetected && 
      (currentTime - lastMotionTime) > 1000) {
    motionDetected = true;
    lastMotionTime = currentTime;
    motionTriggered();
  } 
  else if (pirState == LOW && motionDetected && 
           (currentTime - lastMotionTime) > 1000) {
    motionDetected = false;
    motionCleared();
  }
  
  // Update time on display every second
  static unsigned long lastUpdate = 0;
  if (currentTime - lastUpdate > 1000) {
    updateTime();
    lastUpdate = currentTime;
  }
}

void motionTriggered() {
  Serial.println("MOTION DETECTED!");
  
  // Buzzer pattern
  for(int i = 0; i < 3; i++) {
    digitalWrite(BUZZER_PIN, HIGH);
    delay(200);
    digitalWrite(BUZZER_PIN, LOW);
    delay(100);
  }
  
  digitalWrite(RED_LED, HIGH);
  digitalWrite(GREEN_LED, LOW);
  
  // Update display
  drawStatus();
}

void motionCleared() {
  Serial.println("Motion cleared");
  digitalWrite(BUZZER_PIN, LOW);
  digitalWrite(RED_LED, LOW);
  digitalWrite(GREEN_LED, HIGH);
  
  // Update display
  drawStatus();
}

void drawInterface() {
  tft.fillScreen(ILI9341_BLACK);
  
  // Title bar
  tft.fillRect(0, 0, 320, 40, ILI9341_BLUE);
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(2);
  tft.setCursor(10, 10);
  tft.println("Security System");
  
  // Status box
  tft.drawRect(10, 50, 300, 80, ILI9341_WHITE);
  tft.setTextSize(1);
  tft.setCursor(20, 60);
  tft.println("STATUS:");
  
  drawStatus();
  
  // Info panel
  tft.drawRect(10, 140, 300, 100, ILI9341_WHITE);
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(1);
  tft.setCursor(20, 150);
  tft.println("SYSTEM INFO:");
  tft.setCursor(20, 170);
  tft.print("PIR Sensor: ");
  tft.print(motionDetected ? "ACTIVE" : "STANDBY");
  
  // Visual indicator
  if (motionDetected) {
    tft.fillCircle(290, 235, 8, ILI9341_RED);
  } else {
    tft.fillCircle(290, 235, 8, ILI9341_GREEN);
  }
}

void drawStatus() {
  // Clear status area
  tft.fillRect(20, 80, 280, 40, ILI9341_BLACK);
  
  tft.setTextSize(2);
  tft.setCursor(20, 85);
  
  if (motionDetected) {
    tft.setTextColor(ILI9341_RED);
    tft.println("ALERT! MOTION");
  } else {
    tft.setTextColor(ILI9341_GREEN);
    tft.println("SYSTEM READY");
  }
}

void updateTime() {
  // Clear time area
  tft.fillRect(20, 190, 280, 20, ILI9341_BLACK);
  
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(1);
  tft.setCursor(20, 190);
  tft.print("Uptime: ");
  tft.print(millis() / 1000);
  tft.println(" sec");
}