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

// LCD I2C
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Entrées IR (D22 à D36)
const int irPins[15] = {
  22, 23, 24, 25, 26,
  27, 28, 29, 30, 31,
  32, 33, 34, 35, 36
};

// Sorties Sunlite (D2 à D9)
const int outPins[8] = {
  2, 3, 4, 5, 6, 7, 8, 9
};

// Bouton SAV
const int savButton = 37;

// Table de correspondance 16 → 8
const int map16to8[16] = {
  0, 1, 2, 3, 4, 5, 6, 7,
  0, 1, 2, 3, 4, 5, 6, 7
};

void setup() {
  // Entrées IR
  for (int i = 0; i < 15; i++) {
    pinMode(irPins[i], INPUT);
  }

  // Sorties Sunlite
  for (int i = 0; i < 8; i++) {
    pinMode(outPins[i], OUTPUT);
    digitalWrite(outPins[i], HIGH); // repos = inactif
  }

  pinMode(savButton, INPUT_PULLUP);

  // LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Interface IR/DMX");

  // Watchdog
  wdt_enable(WDTO_1S);
}

void loop() {
  int activeIR = detectActiveInput();
  int mappedOutput = applyMapping(activeIR);

  updateOutputs(mappedOutput);
  displayStatus(activeIR, mappedOutput);

  wdt_reset();
}

int detectActiveInput() {
  for (int i = 0; i < 15; i++) {
    if (digitalRead(irPins[i]) == HIGH) {
      return i + 1;
    }
  }
  return 0;
}

int applyMapping(int irValue) {
  if (irValue == 0) return -1;
  return map16to8[irValue];
}

void updateOutputs(int outIndex) {
  for (int i = 0; i < 8; i++) {
    digitalWrite(outPins[i], HIGH);
  }
  if (outIndex >= 0 && outIndex < 8) {
    digitalWrite(outPins[outIndex], LOW);
  }
}

void displayStatus(int ir, int out) {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("IR: ");
  lcd.print(ir);

  lcd.setCursor(0, 1);
  lcd.print("OUT: ");
  lcd.print(out + 1);
}