//https://github.com/mobizt/Firebase-ESP32
#include <WiFi.h>
#include <FirebaseESP32.h>
#include <addons/TokenHelper.h>
#include <addons/RTDBHelper.h>
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>

#define WIFI_SSID "network"
#define WIFI_PASSWORD "123456789"
#define API_KEY "AIzaSyDrszpkKKAlFS0kCJ1EGW0kSpdl3REq45o"
#define DATABASE_URL "carcrash-5a006-default-rtdb.firebaseio.com"
#define USER_EMAIL "projectcarcrash@gmail.com"
#define USER_PASSWORD "123456789"

Adafruit_MPU6050 mpu;
FirebaseData fbdo;
FirebaseAuth auth;
FirebaseConfig config;

#define front_sensor  33
#define back_sensor   32

unsigned long sendDataPrevMillis = 0;
unsigned long crash_front = 0;
unsigned long crash_back = 0;
unsigned long car_fliped = 0;

int flag1 = 0;
int flag2 = 0;
int flag3 = 0;
int count = 0;

void setup()
{

  Serial.begin(115200);
  mpu.begin();
  pinMode(front_sensor, INPUT);
  pinMode(back_sensor, INPUT);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("Connecting to Wi-Fi");
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(300);
  }
  Serial.println();
  Serial.print("Connected with IP: ");
  Serial.println(WiFi.localIP());
  Serial.println();

  Serial.printf("Firebase Client v%s\n\n", FIREBASE_CLIENT_VERSION);

  /* Assign the api key (required) */
  config.api_key = API_KEY;
  /* Assign the user sign in credentials */
  auth.user.email = USER_EMAIL;
  auth.user.password = USER_PASSWORD;
  /* Assign the RTDB URL (required) */
  config.database_url = DATABASE_URL;
  /* Assign the callback function for the long running token generation task */
  config.token_status_callback = tokenStatusCallback;
  Firebase.begin(&config, &auth);
  Firebase.reconnectWiFi(true);
  Firebase.setDoubleDigits(5);
  if (Firebase.ready()) {
    Serial.printf("Set int... %s\n", Firebase.setInt(fbdo, F("/test/crash_front"), crash_front) ? "ok" : fbdo.errorReason().c_str());
    Serial.println();
    Serial.printf("Set int... %s\n", Firebase.setInt(fbdo, F("/test/crash_back"), crash_back) ? "ok" : fbdo.errorReason().c_str());
    Serial.println();
    Serial.printf("Set int... %s\n", Firebase.setInt(fbdo, F("/test/car_fliped"), car_fliped) ? "ok" : fbdo.errorReason().c_str());
    Serial.println();
  }
  //setupt motion detection
  mpu.setHighPassFilter(MPU6050_HIGHPASS_0_63_HZ);
  mpu.setMotionDetectionThreshold(1);
  mpu.setMotionDetectionDuration(20);
  mpu.setInterruptPinLatch(true);  // Keep it latched.  Will turn off when reinitialized.
  mpu.setInterruptPinPolarity(true);
  mpu.setMotionInterrupt(true);

}

void loop()
{
  crash_front = digitalRead(front_sensor);
  crash_back  = digitalRead(back_sensor);
  if (mpu.getMotionInterruptStatus()) {
    /* Get new sensor events with the readings */
    sensors_event_t a, g, temp;
    mpu.getEvent(&a, &g, &temp);

    /* Print out the values */
    Serial.print("AccelX:");
    Serial.print(a.acceleration.x);
    Serial.print(",");
    Serial.print("AccelY:");
    Serial.print(a.acceleration.y);
    Serial.print(",");
    Serial.print("AccelZ:");
    Serial.print(a.acceleration.z);
    Serial.print(", ");
    Serial.print("GyroX:");
    Serial.print(g.gyro.x);
    Serial.print(",");
    Serial.print("GyroY:");
    Serial.print(g.gyro.y);
    Serial.print(",");
    Serial.print("GyroZ:");
    Serial.print(g.gyro.z);
    Serial.println("");
    if (a.acceleration.x < 0 && a.acceleration.y < 0 && a.acceleration.z < 0 && flag1 == 0 ) {
      count++;
      Serial.println(count);
      if (count == 2) {
        car_fliped = 1;
        Firebase.ready();
        Serial.printf("Set int... %s\n", Firebase.setInt(fbdo, F("/test/car_fliped"), car_fliped) ? "ok" : fbdo.errorReason().c_str());
        flag1 = 1;
        count = 0;
      }
    }
  }
  if (Firebase.ready() && (millis() - sendDataPrevMillis > 100 || sendDataPrevMillis == 0))
  {
    sendDataPrevMillis = millis();
    /*
      crash_front
      crash_back
      car_fliped
    */
    if (crash_front == 1 && flag2 == 0) {
      Serial.printf("Set int... %s\n", Firebase.setInt(fbdo, F("/test/crash_front"), crash_front) ? "ok" : fbdo.errorReason().c_str());
      Serial.println();
      flag2 = 1;
    }
    if (crash_back == 1 && flag3 == 0) {
      Serial.printf("Set int... %s\n", Firebase.setInt(fbdo, F("/test/crash_back"), crash_back) ? "ok" : fbdo.errorReason().c_str());
      Serial.println();
      flag3 = 1;
    }
  }
}// end of LOOP