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

#define SwitchMenu 10
#define  LedPin 11
#define   DISPLAYS 2

const int PINS[][3]     = {{2,3,A0}, {4,5,A1},           {6,7,A2}, {8,9,A3}};
int       VALUES[][2]   = {{-1, -1}, {-1, -1},           {-1, -1}, {-1, -1}};
LiquidCrystal_I2C LCD[] = {LiquidCrystal_I2C(0x27,16,2), LiquidCrystal_I2C(0x26,16,2)};

//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 ";

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};

//Command Strings 12 charactere max
  const char efx1[] PROGMEM = "Delay       ";
  const char efx2[] PROGMEM = "Echo        ";
  const char efx3[] PROGMEM = "Reverb      ";
  const char efx4[] PROGMEM = "Phaser      ";
  const char efx5[] PROGMEM = "Flanger     ";
  const char efx6[] PROGMEM = "LPF         ";
  const char efx7[] PROGMEM = "HPF         ";
  const char efx8[] PROGMEM = "Combo Filter";
  const char efx9[] PROGMEM = "Distortion  ";
 const char efx10[] PROGMEM = "Pan Delay   ";
 const char efx11[] PROGMEM = "Epic Reverb ";
 const char efx12[] PROGMEM = "Bit Crush   ";
 const char efx13[] PROGMEM = "Tremolo     ";
 const char efx14[] PROGMEM = "Repeater    ";
 const char efx15[] PROGMEM = "Braker      ";
 const char efx16[] PROGMEM = "Brake Echo  ";
 const char efx17[] PROGMEM = "Tape Echo   ";
 const char efx18[] PROGMEM = "Looper      ";
 const char efx19[] PROGMEM = "Time Stretch";
 const char efx20[] PROGMEM = "SpiralEcho  ";
 const char efx21[] PROGMEM = "AutoFilter  ";
 const char efx22[] PROGMEM = "Spiral Flang";
 const char efx23[] PROGMEM = "Pitch Delay ";
 const char efx24[] PROGMEM = "Crush Echo  ";
 const char efx25[] PROGMEM = "ParticlDelay";
 const char efx26[] PROGMEM = "Noise Sweep ";
 const char efx27[] PROGMEM = "Sheppard Fil";
 const char efx28[] PROGMEM = "Space Verb  ";
 const char efx29[] PROGMEM = "Filter Echo ";
 const char efx30[] PROGMEM = "Filter Gate ";
 const char efx31[] PROGMEM = "Noise Pulse ";

PGM_P const efxtable[] PROGMEM = {efx1, efx2, efx3, efx4, efx5, efx6, efx7, efx8, efx9, efx10, efx11, efx12, efx13, efx14, efx15, efx16, efx17, efx18, efx19, efx20,
 efx21, efx22, efx23, efx24, efx25, efx26, efx27, efx28, efx29, efx30, efx31};

void setup() {
  for(int i=0; i<DISPLAYS; i++) {
    LCD[i].init();
    LCD[i].backlight();
  pinMode(PINS[i*2][0]  , INPUT); 
  pinMode(PINS[i*2][1]  , INPUT);
  pinMode(PINS[i*2+1][0], INPUT); 
  pinMode(PINS[i*2+1][1], INPUT);
  pinMode(SwitchMenu, INPUT);
  pinMode(LedPin, OUTPUT);
  }
  LCD[0].print(" SeratoFxduino ");
  LCD[0].setCursor(0,1);
  LCD[0].print(" Midi controler ");
  delay(1500);
  LCD[0].clear();
  LCD[0].setCursor(0,0);
  LCD[0].print(" Initialisation ");
  delay(1000);
  LCD[0].clear();
  delay(300);
  LCD[0].setCursor(0,1);
  LCD[0].print("   Terminee !   ");
  delay(1000);
  LCD[0].clear();
}

void loop() {
  for(int i=0; i<DISPLAYS*2; i++) {
    updatemenu(i);
    update_potentiometre(i);
  }
  delay(110);
}

bool buttonState = false;

void updatemenu(int i){
  buttonState = digitalRead(SwitchMenu); // Reads the value from the SwitchMenu
  if (buttonState == LOW){
    digitalWrite(LedPin, LOW); // Turn the LED off
    update_button(i); // Calls the function update_button
  }
  else if (digitalRead(SwitchMenu) == HIGH) {
    digitalWrite(LedPin, HIGH); // Turn the LED on
    update_button1(i); // Calls the function update_button1
  }
}
void update_button(int i) {

  int value = VALUES[i][0];
  if (value == -1 || digitalRead(PINS[i][1]) == HIGH) {
    if (value < 56) value++;
  } else if (digitalRead(PINS[i][0]) == HIGH) {
    if (value > 0) value--;
  }
  if (VALUES[i][0] == value) return;

  char buffer[13];
  strcpy_P(buffer, (char*)pgm_read_word(&(fxtable[VALUES[i][0] = value])));
  LCD[i/2].setCursor(0, i%2);
  LCD[i/2].print(buffer);
}

void update_button1(int i) {

  int value = VALUES[i][0];
  if (value == -1 || digitalRead(3) == HIGH) {
    if (value < 30) value++;
  } else if (digitalRead(2) == HIGH) {
    if (value > 0) value--;
  }
  if (VALUES[i][0] == value) return;

  char buffer[13];
  strcpy_P(buffer, (char*)pgm_read_word(&(fxtable[VALUES[i][0] = value])));
  LCD[0].setCursor(0, i%1);
  LCD[0].print(buffer);
}

void update_potentiometre(int i) {
  int value = map(analogRead(PINS[i][2]), 0, 1023, 0, 100);
  if (VALUES[i][1] == value) return;
  char buf[4];
  sprintf(buf, "%3d%%", VALUES[i][1] = value);
  LCD[i/2].setCursor(12, i%2);
  LCD[i/2].print(buf);
}