#include <LiquidCrystal.h>
#include <Keypad.h>
#include <Servo.h>
#include "SafeState.h"
#include "icons.h"
#include <dht.h>

#define LDR_PIN 2
const float GAMMA = 0.7;
const float RL10 = 50;


dht DHT;

#define DHT22_PIN 13

struct {
  uint32_t total;
  uint32_t ok;
  uint32_t crc_error;
  uint32_t time_out;
  uint32_t connect;
  uint32_t ack_l;
  uint32_t ack_h;
  uint32_t unknown;
} stat = { 0, 0, 0, 0, 0, 0, 0, 0};


int usertemp;  //user inputs**
int userhumadity;
int userlux;



/* Locking mechanism definitions */
#define SERVO_PIN 6
#define SERVO_LOCK_POS   20
#define SERVO_UNLOCK_POS 90
Servo lockServo;

/* Display */
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

/* Keypad setup */
const byte KEYPAD_ROWS = 4;
const byte KEYPAD_COLS = 4;
byte rowPins[KEYPAD_ROWS] = {5, 4, 3, 2};
byte colPins[KEYPAD_COLS] = {A3, A2, A1, A0};
char keys[KEYPAD_ROWS][KEYPAD_COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, KEYPAD_ROWS, KEYPAD_COLS);

/* SafeState stores the secret code*/
SafeState safeState;

void lock() {
  lockServo.write(SERVO_LOCK_POS);
  safeState.lock();
}

void unlock() {
  lockServo.write(SERVO_UNLOCK_POS);
}

void showStartupMessage() {
  lcd.setCursor(4, 0);
  lcd.print("Hi!");
  delay(1000);

  lcd.setCursor(3, 2);
  String message = "amirhossein towfighi";
  for (byte i = 0; i < message.length(); i++) {
    lcd.print(message[i]);
    delay(100);
  }
  delay(500);
}

String inputSecretCode() {
  lcd.setCursor(5, 1);
  lcd.print("[____]");
  lcd.setCursor(6, 1);
  String result = "";
  while (result.length() < 4) {
    char key = keypad.getKey();
    if (key >= '0' && key <= '9') {
      lcd.print('*');
      result += key;
    }
  }
  return result;
}

void showWaitScreen(int delayMillis) {
  lcd.setCursor(2, 1);
  lcd.print("[..........]");
  lcd.setCursor(3, 1);
  for (byte i = 0; i < 10; i++) {
    delay(delayMillis);
    lcd.print("=");
  }
}

bool setNewCode() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Enter new code:");
  String newCode = inputSecretCode();

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Confirm new code");
  String confirmCode = inputSecretCode();

  if (newCode.equals(confirmCode)) {
    safeState.setCode(newCode);
    return true;
  } else {
    lcd.clear();
    lcd.setCursor(1, 0);
    lcd.print("Code was wrong");
    lcd.setCursor(0, 1);
    lcd.print("door not locked!");
    delay(2000);
    return false;
  }
}

void showUnlockMessage() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.write(ICON_UNLOCKED_CHAR);
  lcd.setCursor(4, 0);
  lcd.print("Unlocked!");
  lcd.setCursor(15, 0);
  lcd.write(ICON_UNLOCKED_CHAR);
  delay(1000);
}

void safeUnlockedLogic() {
  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.write(ICON_UNLOCKED_CHAR);
  lcd.setCursor(2, 0);
  lcd.print(" # for lock");
  lcd.setCursor(15, 0);
  lcd.write(ICON_UNLOCKED_CHAR);

  bool newCodeNeeded = true;

  if (safeState.hasCode()) {
    lcd.setCursor(0, 1);
    lcd.print("  A for new code");
    newCodeNeeded = false;
  }

  auto key = keypad.getKey();
  while (key != 'A' && key != '#') {
    key = keypad.getKey();
  }

  bool readyToLock = true;
  if (key == 'A' || newCodeNeeded) {
    readyToLock = setNewCode();
  }

  if (readyToLock) {
    lcd.clear();
    lcd.setCursor(5, 0);
    lcd.write(ICON_UNLOCKED_CHAR);
    lcd.print(" ");
    lcd.write(ICON_RIGHT_ARROW);
    lcd.print(" ");
    lcd.write(ICON_LOCKED_CHAR);

    safeState.lock();
    lock();
    showWaitScreen(100);
  }
}

void safeLockedLogic() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.write(ICON_LOCKED_CHAR);
  lcd.print(" Door Locked! ");
  lcd.write(ICON_LOCKED_CHAR);

  String userCode = inputSecretCode();
  bool unlockedSuccessfully = safeState.unlock(userCode);
  showWaitScreen(200);

  if (unlockedSuccessfully) {
    showUnlockMessage();
    unlock();
  } else {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print(" HEHE!");
    showWaitScreen(1000);
  }
}

void setup() {
   pinMode(LDR_PIN, INPUT);

  Serial.begin(115200);
  Serial.println("Humidity,\tTemperature");
  lcd.begin(16, 2);
  init_icons(lcd);

  lockServo.attach(SERVO_PIN);

  
  if (safeState.locked()) {
    lock();
  } else {
    unlock();
  }

  showStartupMessage();
  
}

void loop() {
  
    uint32_t start = micros();
  int chk = DHT.read22(DHT22_PIN);
  uint32_t stop = micros();

   int humidity =(DHT.humidity);
    Serial.print(humidity);
   {
   if (humidity<40)
   {
    lcd.clear();
lcd.print("water on");
   }
   else 
   {
lcd.clear();
lcd.print("water off");
   }
   delay(3000);
   }
   lcd.clear();
  Serial.print(",\t");
    Serial.print(",\t");
    int temp=DHT.temperature;
  Serial.print(temp);
  {
   if (temp<30)
   {
    
lcd.print("heater on");
   }
   else 
   {

lcd.print("cooler on");
   }
   delay(3000);
   }
   lcd.clear();
   int analogValue = analogRead(A4);
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  Serial.println();
  Serial.print("lux:");
  Serial.print(lux);
  if (lux > 50) {

    lcd.print("light off");
  } else {

    lcd.print("light on");
  }
  Serial.println();
 delay(3000);
 lcd.clear();
  if (safeState.locked()) {
    safeLockedLogic();
  } else {
    safeUnlockedLogic();
  }
}