#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <Adafruit_NeoPixel.h>

Adafruit_SSD1306 display(128, 64);   // 128 pixels width, 64 pixels height

#define LED_PIN   6
#define LED_COUNT 1
Adafruit_NeoPixel neoPixel(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

const int mpuAddress = 0x68;          // I2C address of the MPU-6050

float xByGyro, yByGyro, zByGyro;      // Global variables for the rotation by gyro

// Set the origin in the middle of the display
const int xOrigin = 64;
const int yOrigin = 32;

const float viewDistance = 150.0;     // higher for less perspective, lower for more.

// Vertices for a cube
// A cube has 8 corners and each coordinate has x, y, z values.
#define NUM_VERTICES 8
const int cube_vertex[NUM_VERTICES][3] =
{
  { -20, -20,  20 },     // x, y, z
  {  20, -20,  20 },
  {  20,  20,  20 },
  { -20,  20,  20 },
  { -20, -20, -20 },
  {  20, -20, -20 },
  {  20,  20, -20 },
  { -20,  20, -20 }
};
// Duck 60×64 bitmap
const uint8_t duck_064_bitmap [ ] PROGMEM = {
0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xf0,
0xff, 0xff, 0xfe, 0xbf, 0xff, 0xff, 0xff, 0xf0,
0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0,
0xff, 0xfe, 0xff, 0x5f, 0xfb, 0xff, 0xff, 0xf0,
0xff, 0xff, 0x7f, 0xff, 0xfd, 0xff, 0xff, 0xf0,
0xff, 0xff, 0xff, 0x9f, 0xff, 0xff, 0xff, 0xe0,
0xff, 0xff, 0xbf, 0xff, 0xfb, 0xff, 0xff, 0xf0,
0xff, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xff, 0xd0,
0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0,
0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xf0,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0,
0xff, 0xfd, 0x7f, 0xfe, 0xff, 0xff, 0xff, 0xf0,
0xff, 0xff, 0x3f, 0xf9, 0x3c, 0x7f, 0xff, 0xf0,
0xff, 0xff, 0xff, 0xfe, 0xc7, 0xbf, 0xff, 0xf0,
0xff, 0xff, 0xff, 0xf7, 0xbc, 0xd7, 0xff, 0xf0,
0xff, 0xff, 0xff, 0xcc, 0xdf, 0xfb, 0xff, 0xf0,
0xff, 0xff, 0xfe, 0x7f, 0xcb, 0xe5, 0xff, 0xf0,
0xff, 0xff, 0xfe, 0xfd, 0xbd, 0xbe, 0xff, 0xf0,
0xff, 0xff, 0xfd, 0xff, 0x7e, 0xff, 0xff, 0xf0,
0xff, 0xff, 0xfb, 0x4f, 0xfe, 0xbf, 0x7f, 0xf0,
0xff, 0xff, 0xed, 0x6f, 0x3e, 0xdf, 0x7f, 0xf0,
0xff, 0xff, 0xef, 0xf6, 0xcf, 0x5f, 0xf7, 0xf0,
0xff, 0xff, 0xdb, 0xed, 0xf7, 0x7f, 0x37, 0xf0,
0xff, 0xff, 0xb7, 0xdb, 0xff, 0x5f, 0x9f, 0xf0,
0xff, 0xff, 0xaf, 0xfb, 0xf7, 0x7f, 0xf1, 0xf0,
0xff, 0xff, 0x6f, 0xb7, 0xff, 0xff, 0xf7, 0xf0,
0xff, 0xff, 0xdf, 0x6f, 0xfb, 0x7f, 0xf9, 0xf0,
0xff, 0xfe, 0x7f, 0x6f, 0xff, 0x7f, 0xff, 0xf0,
0xff, 0xff, 0xbe, 0xef, 0xfb, 0x7f, 0xf9, 0xf0,
0xff, 0xfe, 0xbf, 0xdf, 0xf7, 0xff, 0xfd, 0xf0,
0xff, 0xff, 0xb0, 0xff, 0xff, 0xff, 0xfb, 0xf0,
0xff, 0xfe, 0xe3, 0x87, 0xf7, 0xff, 0xfb, 0xf0,
0xff, 0xfe, 0x63, 0xc7, 0xf7, 0xff, 0xf9, 0xf0,
0xe0, 0x7f, 0x61, 0x87, 0xff, 0xff, 0xfd, 0xf0,
0xeb, 0x8f, 0x63, 0x8f, 0xef, 0xff, 0xff, 0xf0,
0xdc, 0xe3, 0x71, 0x0f, 0xef, 0xff, 0xf3, 0xf0,
0x8a, 0xb8, 0x55, 0x1f, 0xef, 0xff, 0xff, 0xf0,
0xd4, 0xce, 0x2a, 0xbf, 0xdf, 0xff, 0xf7, 0xf0,
0xea, 0x31, 0xad, 0xbf, 0xdf, 0xff, 0xff, 0xf0,
0xfa, 0x8e, 0x96, 0x9f, 0xff, 0xff, 0xef, 0xf0,
0xff, 0x62, 0xd2, 0xcf, 0xbf, 0xff, 0xdf, 0xf0,
0xff, 0x99, 0x4f, 0x67, 0x7f, 0xff, 0xdf, 0xf0,
0xff, 0xe5, 0x61, 0x59, 0x7e, 0xff, 0xbf, 0xf0,
0xff, 0xf2, 0xb6, 0xae, 0x12, 0x0f, 0x7f, 0xf0,
0xff, 0xfa, 0x5b, 0xd3, 0xcb, 0xd0, 0xff, 0xf0,
0xff, 0xfc, 0x2a, 0x5c, 0xba, 0x55, 0xff, 0xf0,
0xff, 0xfe, 0x95, 0x53, 0x49, 0x2e, 0xff, 0xf0,
0xff, 0xfe, 0x87, 0xdd, 0x46, 0x82, 0xff, 0xf0,
0xff, 0xf9, 0x50, 0x40, 0x42, 0xfa, 0xff, 0xf0,
0xff, 0xfa, 0x6d, 0x2b, 0x79, 0x2e, 0xff, 0xf0,
0xff, 0xf9, 0xf2, 0x97, 0xff, 0xc0, 0xff, 0xf0,
0xff, 0xf5, 0xda, 0x7f, 0xe7, 0xfb, 0xff, 0xf0,
0xff, 0xf2, 0x4a, 0xff, 0xdf, 0xff, 0xff, 0xf0,
0xff, 0xf5, 0x3e, 0xff, 0x8f, 0xff, 0xff, 0xf0,
0xff, 0xfa, 0x45, 0xfe, 0x47, 0xff, 0xff, 0xf0,
0xff, 0xc9, 0x73, 0xfc, 0x53, 0xff, 0xff, 0xf0,
0xff, 0xb7, 0x20, 0x1a, 0x0b, 0xff, 0xff, 0xf0,
0xfe, 0x84, 0x89, 0x40, 0x41, 0xff, 0xff, 0xf0,
0xfd, 0x35, 0x02, 0xa9, 0x15, 0xff, 0xff, 0xf0,
0xa0, 0xd4, 0x4a, 0xb4, 0x00, 0xff, 0xff, 0xf0,
0x06, 0x54, 0x8a, 0x93, 0xfe, 0xff, 0xff, 0xf0,
0x51, 0x52, 0x1a, 0xd7, 0xff, 0x3f, 0xff, 0xf0,
0x08, 0x09, 0x25, 0x27, 0xff, 0xff, 0xff, 0xf0,
0x25, 0x40, 0x3a, 0x9f, 0xff, 0xdf, 0xff, 0xf0
};

// The wireframe is to display the lines on the OLED display
// It contains the corners of the shape in 2D coordinates
int wireframe[NUM_VERTICES][2];

void setup() {
  Serial.begin(115200);
  Wire.begin();

  // Initialize the OLED display and test if it is connected.
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;) {
      // Hentikan program jika ada kesalahan
    }
  }

  // Initialize the MPU-6050 and test if it is connected.
  Wire.beginTransmission(mpuAddress);
  Wire.write(0x6B); // PWR_MGMT_1 register
  Wire.write(0);     // set to zero (wakes up the MPU-6050)
  auto error = Wire.endTransmission();
  if (error != 0) {
    Serial.println(F("Error, MPU-6050 not found"));
    for (;;) {
      // Hentikan program jika ada kesalahan
    }
  }

 // Initialize the NeoPixel
  neoPixel.begin();

  // Hapus layar OLED
  display.clearDisplay();

  // Menampilkan "RKS" pada OLED
  display.drawBitmap(32, 0, duck_064_bitmap, 64, 64, SSD1306_WHITE);
  display.display();
  delay(2000); // Display bitmap 

  // Clear the display
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(20, 20);
  display.println(F("RKS Chall"));
  display.display();
  delay(2000);

  // Clear display
  display.clearDisplay();
  display.setCursor(0,0);
  display.setTextSize(1);
  display.println("At Tafani F");
  display.println("8803202102");
  display.println("Teknologi IOT");
  display.display();
  display.startscrollright(0x00, 0x07);
  delay(2000);
  display.stopscroll();
  delay(1000);
  display.startscrollleft(0x00, 0x07);
  delay(2000);
  display.stopscroll();
  delay(1000);    
  display.startscrolldiagright(0x00, 0x07);
  delay(2000);
  display.startscrolldiagleft(0x00, 0x07);
  delay(2000);
  display.stopscroll();
  // Referensi : https://lastminuteengineers.com/oled-display-arduino-tutorial/
}

void loop() {
  Wire.beginTransmission(mpuAddress);
  Wire.write(0x3B); // Starting with register 0x3B (ACCEL_XOUT_H)
  Wire.endTransmission(false); // No stop condition for a repeated start

  // The MPU-6050 has the values as signed 16-bit integers.
  // There are 7 values in 14 registers.
  int16_t AcX, AcY, AcZ, Tmp, GyX, GyY, GyZ;

  Wire.requestFrom(mpuAddress, 14); // request a total of 14 bytes
  AcX = Wire.read() << 8 | Wire.read(); // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
  AcY = Wire.read() << 8 | Wire.read(); // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
  AcZ = Wire.read() << 8 | Wire.read(); // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
  Tmp = Wire.read() << 8 | Wire.read(); // 0x41 (TEMP_OUT_H)   & 0x42 (TEMP_OUT_L)
  GyX = Wire.read() << 8 | Wire.read(); // 0x43 (GYRO_XOUT_H)  & 0x44 (GYRO_XOUT_L)
  GyY = Wire.read() << 8 | Wire.read(); // 0x45 (GYRO_YOUT_H)  & 0x46 (GYRO_YOUT_L)
  GyZ = Wire.read() << 8 | Wire.read(); // 0x47 (GYRO_ZOUT_H)  & 0x48 (GYRO_ZOUT_L)

  // The acceleration is directly mapped into the angles.
  // That is rather artificial.
  // The combined gravity could be used for an angle, while ignoring the strength.
  //
  // The gyro sets the rotation speed.
  // The angle created by the rotation speed is added to angle by the accelerometer.
  //
  // The conversion from the sensor values to the rotation is just a value
  // that makes it look good on the display.

  float xByAccel = (float)AcX * 0.0001; // static angle by accelerometer
  float yByAccel = (float)AcY * 0.0001;
  float zByAccel = (float)AcZ * 0.0001;

  xByGyro += (float)GyX * 0.00001; // moving angle by gyro
  yByGyro += (float)GyY * 0.00001;
  zByGyro += (float)GyZ * 0.00001;

  float x = xByAccel + xByGyro; // combine both angles
  float y = yByAccel + yByGyro;
  float z = zByAccel + zByGyro;

  // Keep the radians in range (although the cos/sin functions accept every value)
  if (x < 0.0)
    x += 2.0 * M_PI;
  else if (x > 2.0 * M_PI)
    x -= 2.0 * M_PI;
  if (y < 0.0)
    y += 2.0 * M_PI;
  else if (y > 2.0 * M_PI)
    y -= 2.0 * M_PI;
  if (z < 0.0)
    z += 2.0 * M_PI;
  else if (z > 2.0 * M_PI)
    z -= 2.0 * M_PI;

  // Draw 3D picture
  for (int i = 0; i < NUM_VERTICES; i++) {
    // Rotate Y
    float rotx = cube_vertex[i][2] * sin(y) + cube_vertex[i][0] * cos(y);
    float roty = cube_vertex[i][1];
    float rotz = cube_vertex[i][2] * cos(y) - cube_vertex[i][0] * sin(y);

    // Rotate X
    float rotxx = rotx;
    float rotyy = roty * cos(x) - rotz * sin(x);
    float rotzz = roty * sin(x) + rotz * cos(x);

    // Rotate Z
    float rotxxx = rotxx * cos(z) - rotyy * sin(z);
    float rotyyy = rotxx * sin(z) + rotyy * cos(z);
    float rotzzz = rotzz;

    // Add depth perspective
    rotxxx *= viewDistance / (viewDistance + rotzzz);
    rotyyy *= viewDistance / (viewDistance + rotzzz);

    // Bring to the middle of the screen
    rotxxx += (float)xOrigin;
    rotyyy += (float)yOrigin;

    // Store new vertex values for wireframe drawing
    wireframe[i][0] = (int)rotxxx;
    wireframe[i][1] = (int)rotyyy;
    wireframe[i][2] = (int)rotzzz;
  }
  draw_wireframe();

  // Set the color of the NeoPixel according to the temperature
  // Temperature by the MPU-6050 is -40 to 85.
  // According to the datasheet:
  //   Temperature in Celsius = (raw_value / 340) + 36.53
  // The Hue range for the NeoPixel is the full uint16_t range.
  float Celsius = ((float)Tmp / 340.00) + 36.53;
  float hue = (Celsius + 40.0) / 125.0 * 65535.0;
  uint32_t rgbcolor = neoPixel.ColorHSV((uint16_t)hue);
  neoPixel.setPixelColor(0, rgbcolor);
  neoPixel.show(); // update new values to NeoPixel
}

void draw_wireframe(void) {
  // Start with an empty buffer
  display.clearDisplay();

  // A cube has 8 points and 12 sides.
  // The wireframe contains the 8 points, and the 12 lines are drawn here.
  display.drawLine(wireframe[0][0], wireframe[0][1], wireframe[1][0], wireframe[1][1], SSD1306_WHITE);
  display.drawLine(wireframe[1][0], wireframe[1][1], wireframe[2][0], wireframe[2][1], SSD1306_WHITE);
  display.drawLine(wireframe[2][0], wireframe[2][1], wireframe[3][0], wireframe[3][1], SSD1306_WHITE);
  display.drawLine(wireframe[3][0], wireframe[3][1], wireframe[0][0], wireframe[0][1], SSD1306_WHITE);

  display.drawLine(wireframe[4][0], wireframe[4][1], wireframe[5][0], wireframe[5][1], SSD1306_WHITE);
  display.drawLine(wireframe[5][0], wireframe[5][1], wireframe[6][0], wireframe[6][1], SSD1306_WHITE);
  display.drawLine(wireframe[6][0], wireframe[6][1], wireframe[7][0], wireframe[7][1], SSD1306_WHITE);
  display.drawLine(wireframe[7][0], wireframe[7][1], wireframe[4][0], wireframe[4][1], SSD1306_WHITE);

  display.drawLine(wireframe[0][0], wireframe[0][1], wireframe[4][0], wireframe[4][1], SSD1306_WHITE);
  display.drawLine(wireframe[1][0], wireframe[1][1], wireframe[5][0], wireframe[5][1], SSD1306_WHITE);
  display.drawLine(wireframe[2][0], wireframe[2][1], wireframe[6][0], wireframe[6][1], SSD1306_WHITE);
  display.drawLine(wireframe[3][0], wireframe[3][1], wireframe[7][0], wireframe[7][1], SSD1306_WHITE);

  // Extra cross face on one side
  display.drawLine(wireframe[1][0], wireframe[1][1], wireframe[3][0], wireframe[3][1], SSD1306_WHITE);
  display.drawLine(wireframe[0][0], wireframe[0][1], wireframe[2][0], wireframe[2][1], SSD1306_WHITE);

  // Write the new picture to the display
  display.display();
}