//#include "GravityTDS.h"
#include <EEPROM.h>
#include <max6675.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

//define pin variables
#define TdsSensorPin A1;
int ktcSO = 8;
int ktcCS = 9;
int ktcCLK = 10;
int RD_pin = 3; //relay drain
int RS_pin = 4; //relay water source
int MD_pin = 5; //manual drain pin
int MS_pin = 6; //manual water source
int auto_man = 7; //Auto or Manual flag
int sound_pin = 8; //buzzer pin
int set_tds = 9;
int tds_up = 10;
int tds_down = 11;
int trig_pin = 12;
int echo_pin = 13;
int tds_led = 2;
int wlvl_led = A0;

//water level global variables;
long duration;
int distance;

//temp and TDS global variables
float xTemperature = 25;
float tdsValue = 500;

//pre define function
MAX6675 ktc(ktcCLK,ktcCS,ktcSO);
LiquidCrystal_I2C lcd(0x27, 20, 4);

float get_tds_value();
float get_water_level();
void set_display(int line, int column, String message,String post);
void clear_disp_line(int myLine);


void setup(){
  //set pinmodes

  //input pins
  pinMode(trig_pin, OUTPUT); // Sets the trigPin as an Output
  pinMode(RD_pin, OUTPUT);
  pinMode(tds_led, OUTPUT);
  pinMode(wlvl_led,OUTPUT);
  pinMode(RS_pin, OUTPUT);
  pinMode(sound_pin, OUTPUT);

  //input pins
  pinMode(echo_pin, INPUT); // Sets the echoPin as an Input
  pinMode(set_tds,INPUT);
  pinMode(tds_up,INPUT);
  pinMode(tds_down,INPUT);
  pinMode(auto_man, INPUT);
  pinMode(MS_pin, INPUT);
  pinMode(MD_pin, INPUT);

  Serial.begin(9600);
  lcd.init();         // initialize the lcd
  lcd.backlight();    // Turn on the LCD screen backlight
  /**TDS settings

    gravityTds.setPin(TdsSensorPin);
    gravityTds.setAref(5.0);  //reference voltage on ADC, default 5.0V on Arduino UNO
    gravityTds.setAdcRange(1024);  //1024 for 10bit ADC;4096 for 12bit ADC
    gravityTds.begin();  //initialization
  **/
}

void loop(){

if (auto_man){

}

delay(500);

}

float get_tds_value(){
  /**
  gravityTds.setTemperature(xTemperature);  // set the temperature and execute temperature compensation
  gravityTds.update();  //sample and calculate
  tdsValue = gravityTds.getTdsValue();  // then get the value
  Serial.println("TDS:",tdsValue);
  return(tdsValue);
  **/
  return (400.0);
}

float get_temp_value(){
  /**
  xTemperature = ktc.readCelsius();
  return (xTemperature);
  **/
  return(35.0);
}

float get_water_level(){
  digitalWrite(trig_pin, LOW);
  delayMicroseconds(2);
  digitalWrite(trig_pin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig_pin, LOW);
  duration = pulseIn(echo_pin, HIGH);
  distance = duration * 0.034 / 2; //distance in cm
  return(distance);
}

void set_display(int line, int column, String message,String post){
clear_disp_line(line);
lcd.setCursor(line, column);
lcd.print(message);
  if (post=="celcius"){
    lcd.print(" ");
    lcd.print((char)223);
    lcd.print("C");
  } else if (post=="ppm"){
    lcd.print(" PPM");
  } else {
    //do nothing
  }
}

void clear_disp_line(int myLine){
  for (int i = 0; i <= 20; i++){
    lcd.setCursor(myLine,i);
    lcd.write(254);
  }
}