#include <LiquidCrystal_I2C.h>
#include <Keypad.h>

const uint8_t ROWS = 4;
const uint8_t COLS = 4;
int keys[ROWS][COLS] = {
  { 1, 2, 3, 0 },
  { 4, 5, 6, 0 },
  { 7, 8, 9, 0 },
  { 0, 0, 0, 0 }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

#define pir1 10
#define pir2 11
#define pir3 12
#define pir4 13
#define pir5 14
#define pir6 15
#define light1 16
#define light2 17
#define light3 18
#define light4 19
#define light5 22

byte lightBanks [] = {1,1,1,1,0};

LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows

byte lastState = 3; 

void setup() {

 lcd.init(); // initialize the lcd
  lcd.backlight();
  lcd.println("Setup Complete");
  delay(1500);
  lcd.clear();

  pinMode(pir1, INPUT);
  pinMode(pir2, INPUT);
  pinMode(pir3, INPUT);
  pinMode(pir4, INPUT);
  pinMode(pir5, INPUT);
  pinMode(pir6, INPUT);
  pinMode(light1, OUTPUT);
  pinMode(light2, OUTPUT);
  pinMode(light3, OUTPUT);
  pinMode(light4, OUTPUT);
  pinMode(light5, OUTPUT);
  
  

}

void loop() {
 
int key = keypad.getKey();

  if (key != NO_KEY) {
lcd.clear();
lcd.println(key);
 lightBanks[key-1] = lightBankSet(key,lightBanks);
 lcd.clear();
 lcd.println(lightBanks[key-1]);
  }

 byte sensor = digitalRead(pir1);
 
 if(lastState != sensor){

lcd.clear();
 lcd.println(sensor);
 lastState = sensor;

digitalWrite(light1,sensor);
 }


}

byte sensorRead(){

}

byte lightBankSet(int key,byte lightBanks[]){

 byte stateChange; 

    switch (lightBanks[key-1]){
      case 0: 
      lcd.clear();
      lcd.print("light Bank ");
      lcd.print(key);
      lcd.print(" ON");
      delay (1000);
      stateChange = 1;
      break;
      case 1:
      lcd.clear();
      lcd.print("light Bank ");
      lcd.print(key);
      lcd.print(" OFF");
      delay (1000);
      stateChange = 0;
    }



return stateChange;
}