#include "DHT.h"
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <OneWire.h>
#include <DallasTemperature.h>

#define DHTPIN    15
#define DHTTYPE   DHT22
#define SOIL_PIN  34
#define LDR_PIN   35

#define ONE_WIRE_BUS 4

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 20, 4);
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature soilTemp(&oneWire);

String soilBucket(int v) {
  if (v <= 2000) return "Dry";
  if (v <= 3000) return "Moist";
  if (v <= 3800) return "Wet";
  return "Sat";
}

String lightBucket(int v) {
  if (v <= 1000) return "Low";
  if (v <= 2000) return "Med";
  if (v <= 3000) return "Good";
  if (v <= 3800) return "High";
  return "V.High";
}

void clearLine(uint8_t row) {
  lcd.setCursor(0, row);
  for (int i = 0; i < 20; i++) lcd.print(' ');
  lcd.setCursor(0, row);
}

unsigned long tick = 0;

void setup() {

  Serial.begin(115200);

  dht.begin();
  soilTemp.begin();

  lcd.init();
  lcd.backlight();


  lcd.setCursor(0, 0); lcd.print("Smart System (Seedo)");
  lcd.setCursor(0, 1); lcd.print("Initializing sensors");
  lcd.setCursor(0, 2); lcd.print("DHT22 + DS18B20 +");
  lcd.setCursor(0, 3); lcd.print("Moisture + LDR");
  delay(1800);
}

void loop() {

  float temperature = dht.readTemperature();
  float humidity    = dht.readHumidity();


  int moisture = analogRead(SOIL_PIN);


  int lightValue = analogRead(LDR_PIN);


  soilTemp.requestTemperatures();
  float soilC = soilTemp.getTempCByIndex(0);


  String soilCat  = soilBucket(moisture);
  String lightCat = lightBucket(lightValue);



  clearLine(0);
  if (isnan(temperature) || isnan(humidity)) {
    lcd.print("DHT err. retrying...");
  } else {
    lcd.print("Temp:"); lcd.print((int)round(temperature)); lcd.print("C  ");
    lcd.print("Humid:"); lcd.print((int)round(humidity));    lcd.print("%");
  }


  clearLine(1);
  // lcd.print("SoilT:");
  // if (soilC == DEVICE_DISCONNECTED_C) {
  //   lcd.print("N/A");
  // } else {
  //   lcd.print((int)round(soilC)); lcd.print("C");
  // }

  lcd.print("Moist:"); lcd.print(moisture);
  lcd.print(" "); lcd.print(soilCat);


  clearLine(2);
  lcd.print("Light:"); lcd.print(lightValue);
  lcd.print("  ");    lcd.print(lightCat);


  clearLine(3);
  lcd.print("OK  #"); lcd.print(++tick);


  /*
  Serial.print("Ambient: "); Serial.print(temperature); Serial.print("C  ");
  Serial.print(humidity); Serial.println("%");
  Serial.print("SoilT: "); Serial.print(soilC); Serial.println("C");
  Serial.print("Moisture: "); Serial.println(moisture);
  Serial.print("Light: "); Serial.println(lightValue);
  Serial.println("-------------------------");
  */

  delay(2000);
}