#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>
#include <IRremote.h>
#include <DHT.h>
#include <Keypad.h>
#include "SafeState.h"
#include <Adafruit_Sensor.h>
#include <DHT_U.h>

#define SERVO_PIN 12
#define SERVO_LOCK_POS   20
#define SERVO_UNLOCK_POS 90
Servo lockServo;

#define DHTPIN 16
#define DHTTYPE    DHT22

DHT_Unified dht(DHTPIN, DHTTYPE);



/* Display */
LiquidCrystal_I2C lcd(0x27, 20, 4);

/* Keypad setup */
const byte KEYPAD_ROWS = 4;
const byte KEYPAD_COLS = 4;
byte rowPins[KEYPAD_ROWS] = {9, 8, 7, 6};
byte colPins[KEYPAD_COLS] = {5, 4, 3, 2};
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 safeState;

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

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

void showStartupMessage() {
  lcd.setCursor(4, 1);
  String a = "WELCOM TO";
  for (byte i = 0; i < a.length(); i++) {
    lcd.print(a[i]);
    delay(100);
  }
  delay(1000);

  lcd.setCursor(0, 2);
  String message = "    SMART HOME";
  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 mismatch");
    lcd.setCursor(0, 1);
    lcd.print("Safe 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.clear();
  delay(100);

  sensors_event_t event;
  dht.temperature().getEvent(&event);
  if (!isnan(event.temperature)) {
      lcd.setCursor(0,1);
      lcd.print(event.temperature);
      lcd.print(F("\xdf"));
      lcd.print(F("C"));
  }
  dht.humidity().getEvent(&event);
  if (!isnan(event.relative_humidity)) {
      lcd.setCursor(0,2);
      lcd.print(event.relative_humidity);
      lcd.print(F("%"));
  }
  lcd.setCursor(4, 0);
  lcd.print("Unlocked!");
  delay(3000);
}

void safeUnlockedLogic() {
  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.print("PRESS A TO NEW CODE");
  lcd.setCursor(0,1);
  lcd.print("PRESS # TO LOCK");
  lcd.setCursor(15, 0);

  bool 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.print(" ");
    lcd.print(" ");

    safeState.lock();
    lock();
    showWaitScreen(10);
  }
}

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

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

  if (unlockedSuccessfully) {
    showUnlockMessage();
    unlock();
  } else {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Access Denied!");
    showWaitScreen(500);
  }
}
int counter = 0;


void setup() {

  lcd.begin(16, 2);

  lockServo.attach(SERVO_PIN);

  /* Make sure the physical lock is sync with the EEPROM state */
  Serial.begin(115200);
  if (safeState.locked()) {
    lock();
  } else {
    unlock();
  }
  delay(1000);
  showStartupMessage();
  lcd.clear();
  dht.begin();
  sensor_t sensor;
  dht.temperature().getSensor(&sensor);
  dht.humidity().getSensor(&sensor);

}

void loop() {
  if (safeState.locked()) {
    safeLockedLogic();
  } else {
    safeUnlockedLogic();
  }
}

void loop2()
{

  delay(100);

  sensors_event_t event;
  dht.temperature().getEvent(&event);
  if (!isnan(event.temperature)) {
      //lcd.setCursor(0,1);
      lcd.print(event.temperature);
      lcd.print(F("\xdf"));
      lcd.print(F("C"));
  }
  dht.humidity().getEvent(&event);
  if (!isnan(event.relative_humidity)) {
      //lcd.setCursor(0,2);
      lcd.print(event.relative_humidity);
      lcd.print(F("%"));
  }
   delay(1000);
}