#include <Wire.h>
#include <MPU6050.h>

MPU6050 mpu;

// Pins
const int FAN_LED = 2;
const int LIGHT_LED = 4;
const int DOOR_LED = 5;
const int BUZZER = 18;

// Variables
int16_t ax, ay, az;
bool fanOn = false;
bool lightOn = false;

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);

  pinMode(FAN_LED, OUTPUT);
  pinMode(LIGHT_LED, OUTPUT);
  pinMode(DOOR_LED, OUTPUT);
  pinMode(BUZZER, OUTPUT);

  mpu.initialize();

  if (!mpu.testConnection()) {
    Serial.println("MPU6050 failed");
    while (1);
  }
}

void loop() {
  mpu.getAcceleration(&ax, &ay, &az);

  // 🔥 JSON Output for Dashboard
  Serial.print("{");
  Serial.print("\"ax\":"); Serial.print(ax); Serial.print(",");
  Serial.print("\"ay\":"); Serial.print(ay); Serial.print(",");
  Serial.print("\"az\":"); Serial.print(az); Serial.print(",");
  Serial.print("\"fan\":"); Serial.print(fanOn ? "true" : "false"); Serial.print(",");
  Serial.print("\"light\":"); Serial.print(lightOn ? "true" : "false");
  Serial.println("}");

  // Gesture control
  if (ax < -10000) {
    fanOn = true;
    digitalWrite(FAN_LED, HIGH);
  } else if (ax > 10000) {
    fanOn = false;
    digitalWrite(FAN_LED, LOW);
  }

  if (ay > 12000) {
    lightOn = true;
    digitalWrite(LIGHT_LED, HIGH);
  } else if (ay < -12000) {
    lightOn = false;
    digitalWrite(LIGHT_LED, LOW);
  }

  // Door stable
  if (abs(ax) < 1000 && abs(ay) < 1000 && abs(az - 16384) < 1000) {
    digitalWrite(DOOR_LED, HIGH);
  } else {
    digitalWrite(DOOR_LED, LOW);
  }

  // Shake buzzer
  if (abs(ax) > 15000 || abs(ay) > 15000 || abs(az - 16384) > 8000) {
    digitalWrite(BUZZER, HIGH);
  } else {
    digitalWrite(BUZZER, LOW);
  }

  delay(200);
}