#include <MD_MAX72xx.h>
#include <SPI.h>

#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 4
#define CLK_PIN   14
#define DATA_PIN  12
#define CS_PIN    15

#define TURN_SIGNAL 5  // GPIO pin for the first switch (bottom-left LEDs)
#define OIL_TEMP 18 // GPIO pin for the second switch (top-left LEDs)

MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

unsigned long previousMillis = 0;  // Stores the last time LEDs were updated
const long interval = 500;        // Interval for LED flashing (0.5 seconds)
bool bottomLeftState = false;      // To keep track of the flashing state for bottom-left LEDs

void setup() {
  mx.begin();  // Initialize the matrix
  pinMode(TURN_SIGNAL, INPUT_PULLUP);  // Set the first button pin as input with internal pull-up
  pinMode(OIL_TEMP, INPUT_PULLUP);  // Set the second button pin as input with internal pull-up
}

void loop() {
  unsigned long currentMillis = millis();  // Get the current time

  // Read the state of the buttons (pressed = LOW, not pressed = HIGH)
  int buttonState1 = digitalRead(TURN_SIGNAL);
  int buttonState2 = digitalRead(OIL_TEMP);

  // Handle bottom-left LEDs (flashing with Button 1)
  if (buttonState1 == LOW) {
    if (currentMillis - previousMillis >= interval) {
      // Toggle the flashing state every 2 seconds
      previousMillis = currentMillis;
      bottomLeftState = !bottomLeftState;  // Toggle state

      if (bottomLeftState) {
        // Turn on the bottom-left corner 4 LEDs
        mx.setPoint(0, 7, true); // Bottom-left LED
        mx.setPoint(1, 7, true); // Next LED to the right
        mx.setPoint(0, 6, true); // LED above the bottom-left
        mx.setPoint(1, 6, true); // LED to the right of the one above
      } else {
        // Turn off the bottom-left LEDs
        mx.setPoint(0, 7, false);
        mx.setPoint(1, 7, false);
        mx.setPoint(0, 6, false);
        mx.setPoint(1, 6, false);
      }
      mx.update();  // Apply the changes
    }
  } else {
    // If Button 1 is not pressed, turn off the bottom-left LEDs
    mx.setPoint(0, 7, false);
    mx.setPoint(1, 7, false);
    mx.setPoint(0, 6, false);
    mx.setPoint(1, 6, false);
    mx.update();
  }

  // Handle top-left LEDs (on when Button 2 is pressed)
  if (buttonState2 == LOW) {
    // Light up the top-left corner 4 LEDs
    mx.setPoint(0, 0, true); // Top-left LED
    mx.setPoint(1, 0, true); // Next LED to the right
    mx.setPoint(0, 1, true); // LED below the top-left
    mx.setPoint(1, 1, true); // LED to the right below the second
    mx.update();  // Apply the changes
  } else {
    // If Button 2 is not pressed, turn off the top-left LEDs
    mx.setPoint(0, 0, false);
    mx.setPoint(1, 0, false);
    mx.setPoint(0, 1, false);
    mx.setPoint(1, 1, false);
    mx.update();
  }
}