#include "menus.h"


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

#define upButton     10
#define downButton   11
#define selectButton 12

#define DITEKAN LOW
#define BOUNCE 100

#define LINELENGTH   21

LiquidCrystal_I2C lcd(0x27, 20, 4);


const byte ROWS = 4; 
const byte COLS = 4; 

char hexaKeys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte rowPins[ROWS] = {9, 8, 7, 6}; 
byte colPins[COLS] = {5, 4, 3, 2};

Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 

bool runOnce = true;

// ---------------------------------------------------------------------------------------------------

void  printFourLines( PGM_P base, int line = 0 ) {      // displays 4 lines from selected menu stored in flash
                                                        // default starting line is the first line
  base += line * LINELENGTH;                            // starting with specified line

  lcd.clear();

  for ( int k = 0; k < 4; k++ ) {                       // up to you to make sure
    lcd.setCursor(0, k);                                // that it does not display past end of menu
    for ( int i = 0; i < LINELENGTH-1; i++ ) {
      lcd.print((char) pgm_read_byte( base + i) );
    }
    base += LINELENGTH;
  }
}

// ---------------------------------------------------------------------------------------------------

void initScreen() {

  for (int i = 0; i < introLineCount; i += 4) {         // introLineCount is calculated at compile time and
    printFourLines( intro[0], i );  delay(500);         // a constant is inserted
  }
}

// ---------------------------------------------------------------------------------------------------

void menuPERINGATAN() {

  printFourLines( periMenu[0] );                        // display 4 lines from menu
  delay(3000);
  lcd.clear();
}

// ---------------------------------------------------------------------------------------------------

void menuSETTING() {

  int line = 0;
  bool update = true;

  while (1) {

    if (update) {                                       // update screen only when it changes
      printFourLines( settingsMenu[0], line );          // display 4 lines from menu
      update = false;
    }
    else {
      switch (customKeypad.getKey()) {
        case 'A':  line--;  if (line < 0) line = 4;  update = true;  break;
        case 'B':  line++;  if (line > 4) line = 0;  update = true;  break;
        case '1':  submenuCONFIGMODE();                              break;
        case '2':  submenuSTATUSSENSOR();                            break;
        case '3':  submenuMANUALOUTPUT();                            break;
        case '4':  submenuTIMECHECK();                               break;
        case '5':  submenuWIFICHECK();                               break;
        case '0':  runOnce = true;  return;                          break;
      }
    }
  }
}

// ---------------------------------------------------------------------------------------------------

void submenuCONFIGMODE() {

  printFourLines( configMenu[0] );                      // display 4 lines from menu

  while(1) {
    switch (customKeypad.getKey()) {
      case '0':  menuSETTING();  break;
    }
  }
}

// ---------------------------------------------------------------------------------------------------

void submenuSTATUSSENSOR() {

  int  line   = 0;
  bool update = true;

  while (1) {
    if (update) {                                       // update screen only when it changes
      printFourLines( statusMenu[0], line );            // display 4 lines from menu
      update = false;
    }
    else {
      switch (customKeypad.getKey()) {
        case 'A':  line--;  if (line < 0) line = 5;  update = true;  break;    // scroll down
        case 'B':  line++;  if (line > 5) line = 0;  update = true;  break;    // scroll up
        case '0':  menuSETTING();                                    break;
      }
    }
  }
}

// ---------------------------------------------------------------------------------------------------

void submenuMANUALOUTPUT() {

  int  line   = 0;
  bool update = true;

  while (1) {                                           // loop 
    if (update) {                                       // update screen only when it changes
      printFourLines( manualMenu[0], line );            // display 4 lines from menu, starting at (line)
      update = false;
    }
    else {
      switch (customKeypad.getKey()) {
        case 'A':  line--;  if (line < 0) line = 4;  update = true;  break;
        case 'B':  line++;  if (line > 4) line = 0;  update = true;  break;
        case '0':  menuSETTING();                                    break;
      }
    }
  }
}

// ---------------------------------------------------------------------------------------------------

void submenuTIMECHECK() {

  printFourLines( timeMenu[0] );                        // display 4 lines from menu

  while(1) {
    switch (customKeypad.getKey()) {
      case '0':  menuSETTING();  break;
    }
  }
}

// ---------------------------------------------------------------------------------------------------

void submenuWIFICHECK() {

  printFourLines( WiFiMenu[0] );                        // display 4 lines from menu

  while(1) {
    switch (customKeypad.getKey()) {
      case '0':  menuSETTING();  break;
    }
  }
}

// ---------------------------------------------------------------------------------------------------

void setup() {
  
  Serial.begin(9600);

  pinMode(upButton,     INPUT_PULLUP);
  pinMode(downButton,   INPUT_PULLUP);
  pinMode(selectButton, INPUT_PULLUP);

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

  initScreen();
}

// ---------------------------------------------------------------------------------------------------

void loop() { 
//char customKey = customKeypad.getKey();

  if (runOnce) {
    printFourLines( loopMenu[0] );                      // display 4 lines from menu
    runOnce = false;
  }

  switch (customKeypad.getKey()) {
    case '0':
      menuSETTING();
    break;
    case '1':
    case '2':
    case '3':
    case '4':
    case '5':
    case '6':
    case '7':
    case '8':
    case '9':
    case 'A':
    case 'B':
    case 'C':
    case 'D':
      menuPERINGATAN();
    break;
    }

  // lcd.clear(); 

  // lcd.setCursor(0, 0);
  // lcd.print(F("Times   : 10:30"));
  // lcd.setCursor(0, 1);
  // lcd.print(F("Days    : Thursday"));
  // lcd.setCursor(0, 2);
  // lcd.print(F("Months  : September"));
  // lcd.setCursor(0, 3);
  // lcd.print(F("Years   : 2023"));

  // delay(5000);
  // lcd.clear(); 
}