#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <avr/pgmspace.h>

#define progMemBuffer 128
#define BUTTON_UP_1_PIN    2
#define BUTTON_DOWN_1_PIN  3
#define BUTTON_UP_2_PIN    4
#define BUTTON_DOWN_2_PIN  5
#define POT_1_PIN          A0
#define POT_2_PIN          A1

LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display

//Command Strings 12 charactere max
  const char fx1[] PROGMEM = "Delay       ";
  const char fx2[] PROGMEM = "Echo        ";
  const char fx3[] PROGMEM = "Reverb      ";
  const char fx4[] PROGMEM = "Phaser      ";
  const char fx5[] PROGMEM = "Flanger     ";
  const char fx6[] PROGMEM = "LPF         ";
  const char fx7[] PROGMEM = "LFO Filter  ";
  const char fx8[] PROGMEM = "HPF         ";
  const char fx9[] PROGMEM = "Combo Filter";
 const char fx10[] PROGMEM = "Pan Delay   ";
 const char fx11[] PROGMEM = "Distortion  ";
 const char fx12[] PROGMEM = "Version Echo";
 const char fx13[] PROGMEM = "Epic Reverb ";
 const char fx14[] PROGMEM = "EpicVerbDrop";
 const char fx15[] PROGMEM = "Bit Crush   ";
 const char fx16[] PROGMEM = "Tremolo     ";
 const char fx17[] PROGMEM = "Transform   ";
 const char fx18[] PROGMEM = "Repeater    ";
 const char fx19[] PROGMEM = "Shredder    ";
 const char fx20[] PROGMEM = "Braker      ";
 const char fx21[] PROGMEM = "Brake Echo  ";
 const char fx22[] PROGMEM = "CleanEchoOut";
 const char fx23[] PROGMEM = "Echo Out    ";
 const char fx24[] PROGMEM = "Fader/Echo  ";
 const char fx25[] PROGMEM = "Tape Echo   ";
 const char fx26[] PROGMEM = "CombTapeEcho";
 const char fx27[] PROGMEM = "Twist Echo  ";
 const char fx28[] PROGMEM = "Looper      ";
 const char fx29[] PROGMEM = "Pitch Looper";
 const char fx30[] PROGMEM = "Shuffler    ";
 const char fx31[] PROGMEM = "Time Stretch";
 const char fx32[] PROGMEM = "Time Freeze ";
 const char fx33[] PROGMEM = "SpiralEchoUp";
 const char fx34[] PROGMEM = "Sp.Echo Down";
 const char fx35[] PROGMEM = "Res LPF Auto";
 const char fx36[] PROGMEM = "Res HPF Auto";
 const char fx37[] PROGMEM = "AutoFilter  ";
 const char fx38[] PROGMEM = "Spiral Flang";
 const char fx39[] PROGMEM = "Pitch Delay ";
 const char fx40[] PROGMEM = "Chiptunes   ";
 const char fx41[] PROGMEM = "ShortCircuit";
 const char fx42[] PROGMEM = "Shifter Lofi";
 const char fx43[] PROGMEM = "Side Delay  ";
 const char fx44[] PROGMEM = "Crush Echo  ";
 const char fx45[] PROGMEM = "ParticleDela";
 const char fx46[] PROGMEM = "Noise Sweep ";
 const char fx47[] PROGMEM = "Noise Synth ";
 const char fx48[] PROGMEM = "Sheppard Fil";
 const char fx49[] PROGMEM = "UFO         ";
 const char fx50[] PROGMEM = "Space Verb  ";
 const char fx51[] PROGMEM = "Sp Verb Lift";
 const char fx52[] PROGMEM = "Sp Verb Drop";
 const char fx53[] PROGMEM = "Filter Echo ";
 const char fx54[] PROGMEM = "Dub Echo    ";
 const char fx55[] PROGMEM = "Filter Gate ";
 const char fx56[] PROGMEM = "Bass Ducker ";
 const char fx57[] PROGMEM = "Noise Pulse ";
  
 //array of pointers to the above command strings
PGM_P const fxtable[] PROGMEM = 
{fx1, fx2, fx3, fx4, fx5, fx6, fx7, fx8, fx9, fx10, fx11, fx12, fx13, fx14, fx15, fx16, fx17, fx18, fx19, fx20,
 fx21, fx22, fx23, fx24, fx25, fx26, fx27, fx28, fx29, fx30, fx31, fx32, fx33, fx34, fx35, fx36, fx37, fx38, fx39,
 fx40, fx41, fx42, fx43, fx44, fx45, fx46, fx47, fx48, fx49,fx50, fx51, fx52, fx53, fx54, fx55, fx56, fx57};

// Function that finds the string in prog mem arrays and gets it into usable space
char buffer[progMemBuffer];
char* getStringfromProgMem(const char* const fxtable[], int i)

{
strcpy_P(buffer, (char*)pgm_read_word(&(fxtable[i])));
return buffer;
};

char lcd_line1[16]; 
char lcd_line2[16];

void LCD_Msg(LiquidCrystal_I2C &lcd, int top, int bottom, unsigned long del);
void Msg(LiquidCrystal_I2C &lcd, const char *top, const char *bottom, unsigned long del); 

void setup()
{
   pinMode(BUTTON_UP_1_PIN,INPUT); 
   pinMode(BUTTON_DOWN_1_PIN,INPUT);
   pinMode(BUTTON_UP_2_PIN,INPUT); 
   pinMode(BUTTON_DOWN_2_PIN,INPUT);
   lcd.init();
   lcd.backlight();
   lcd.print(" SeratoFxduino ");
      lcd.setCursor(0,1);
   lcd.print(" Midi controler ");
   delay(1500);
   lcd.clear();
   lcd.setCursor(0,0);
   lcd.print(" Initialisation ");
   delay(1000);
   lcd.clear();
     delay(300);
   lcd.setCursor(0,1);
   lcd.print("   Terminee !   ");
   delay(1000);
   lcd.clear();
}

void loop()
{
  potentiometre();
  static int menuIndex1 = 0;
  static int menuIndex2 = 0;

  if (digitalRead(BUTTON_UP_1_PIN) == HIGH) {
    if (menuIndex1 > 0) menuIndex1--;
  } else if (digitalRead(BUTTON_DOWN_1_PIN) == HIGH) {
    if (menuIndex1 < 56) menuIndex1++;
  }

  if (digitalRead(BUTTON_UP_2_PIN) == HIGH) {
    if (menuIndex2 > 0) menuIndex2--;
  } else if (digitalRead(BUTTON_DOWN_2_PIN) == HIGH) {
    if (menuIndex2 < 56) menuIndex2++;
  }

  lcd.setCursor(0, 0);
  strcpy_P(lcd_line1, (char*)pgm_read_word(&(fxtable[menuIndex1])));
  lcd.print(lcd_line1);
  lcd.setCursor(15, 0);
  lcd.print("%");

  lcd.setCursor(0, 1);
  strcpy_P(lcd_line2, (char*)pgm_read_word(&(fxtable[menuIndex2])));
  lcd.print(lcd_line2);
  lcd.setCursor(15, 1);
  lcd.print("%");
  delay(110);
}

void potentiometre(){
  int potValue1 = map(analogRead(POT_1_PIN), 0, 1023, 0, 100);
  int potValue2 = map(analogRead(POT_2_PIN), 0, 1023, 0, 100);

if (potValue1<100){
  lcd.setCursor(12, 0);
  lcd.print(" ");
  lcd.setCursor(13, 0);
  lcd.print(potValue1);
}
else {
      lcd.setCursor(12, 0);
  lcd.print(potValue1);
}
if (potValue2<100){
      lcd.setCursor(12, 1);
    lcd.print(" ");
  lcd.setCursor(13, 1);
  lcd.print(potValue2);
}
else {
    lcd.setCursor(12, 1);
  lcd.print(potValue2);
}}