//******** Libraries ***********
#include <SparkFun_Qwiic_Relay.h>
#include <U8glib.h>
#include "SparkFun_Qwiic_Relay.h"
#include "U8glib.h"
#include <Wire.h>
#include <SoftwareSerial.h>
#define rx 2
#define tx 3
#include "TSYS01.h"
#include "MS5837.h"
#define RELAY_ADDR 0x18
#include <SPI.h>
#include <SD.h>
//*******************************

TSYS01 sensor1;
MS5837 sensor0;

SoftwareSerial myserial(rx, tx);
Qwiic_Relay relay(RELAY_ADDR);
File myFile;

int currentpos = 0;
int sensordata [] = {};
float relaytime = 0;
int sensortiming = 0;
String inputstring = "";
String sensorstring = "";
boolean input_string_complete = false;
boolean sensor_string_complete = false;

void setup() {

  SD.remove("Output.txt");
  Serial.begin(9600);
  myserial.begin(9600);
  inputstring.reserve(10);
  sensorstring.reserve(30);
  Wire.begin();

  sensor1.init();
  while (!sensor0.init()) {
    Serial.println("Init failed!");
    Serial.println("Are SDA/SCL connected correctly?");
    Serial.println("Blue Robotics Bar30: White=SDA, Green=SCL");
    Serial.println("\n\n\n");
    delay(5000);
  }

  if(!relay.begin()) {

    Serial.println("Check connections to Qwiic Relay.");

  } else {

    Serial.println("Ready to flip some switches.");

  float version = relay.singleRelayVersion();

  Serial.print("Firmware Version: ");

  Serial.println(version);

  }


  Serial.print("Initializing SD card...");

  if (!SD.begin(4)) {
    Serial.println("initialization failed!");
    while (1);
  }
  Serial.println("initialization done.");

  myFile = SD.open("Output.txt", FILE_WRITE);

  if (myFile) {
    Serial.print("Writing to Output.txt...");
    myFile.println("Success");
    myFile.close();
    Serial.println("done.");
  } else {
    Serial.println("error opening Output.txt");
  }

  sensor0.setModel(MS5837::MS5837_30BA);
  sensor0.setFluidDensity(997); // kg/m^3 (freshwater, 1029 for seawater)
}

void serialEvent() {
  inputstring = Serial.readStringUntil(13);
  input_string_complete = true;
}

void loop() {

  if (relaytime >= 10) {

    relay.turnRelayOn();

    delay(1000);

    relay.turnRelayOff();

    delay(1000);

    relay.turnRelayOn();

    delay(1000);

    relay.turnRelayOff();

    relaytime = -10; //The time it takes for the relay to execute again (in seconds)

    myFile = SD.open("Output.txt", FILE_WRITE);
    myFile.print("Pressure: ");
    myFile.print(sensordata [0]);
    myFile.println(" mbar");
    myFile.close();

  }


  if (sensortiming == 1000) {
    sensor0.read();
    sensor1.read();

    Serial.print("Pressure: ");
    Serial.print(sensor0.pressure());
    Serial.println(" mbar");
    sensordata [currentpos] = sensor0.pressure();
    currentpos = currentpos+1;

    Serial.print("Temperature: ");
    Serial.print(sensor1.temperature());
    Serial.println(" deg C");

    Serial.print("Depth: ");
    Serial.print(sensor0.depth());
    Serial.println(" m");

    Serial.print("Altitude: ");
    Serial.print(sensor0.altitude());
    Serial.println(" m above mean sea level");
    Serial.println("");
    sensortiming = 0;
  }


  if (input_string_complete == true) {
    myserial.print(inputstring);
    myserial.print('\r');
    inputstring = "";
    input_string_complete = false;
  }

  if (myserial.available() > 0) {
    char inchar = (char)myserial.read();
    sensorstring += inchar;
    if (inchar == '\r') {
      sensor_string_complete = true;
    }
  }

  if (sensor_string_complete == true) {
    Serial.print("pH: ");
    Serial.println(sensorstring);
    sensorstring = "";
    sensor_string_complete = false;
  }

  delay(1);
  sensortiming = sensortiming+1;
  relaytime = relaytime+0.001;
}