// ESP32 + IR Alıcı + Kumanda + 3 LED + Buzzer + OLED
// IR kumanda ile LED kontrolü + OLED'de durum gösterimi
// Serial'da tam decode sonucu → yeni buton eklemek kolay

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <IRremote.hpp>       // IRremote v4+

#define IR_RECV_PIN  5
#define LED_GREEN    18
#define LED_YELLOW   4
#define LED_RED      15
#define BUZZER_PIN   14

#define SCREEN_W 128
#define SCREEN_H 64
#define OLED_ADDR 0x3C

Adafruit_SSD1306 oled(SCREEN_W, SCREEN_H, &Wire, -1);

String   lastKey    = "---";
String   lastAction = "Bekliyor";
uint32_t pressCount = 0;
bool     ledG = false, ledY = false, ledR = false;

// IR debounce
uint16_t lastCmd = 0;
unsigned long lastCmdMs = 0;

// ============ Helpers ============
void lcdAt(int x, int y, uint8_t size, const String &t) {
  oled.setTextSize(size);
  oled.setCursor(x, y);
  oled.print(t);
}

void centered(uint8_t y, uint8_t size, const String &t) {
  int w = t.length() * 6 * size;
  int x = (128 - w) / 2;
  if (x < 0) x = 0;
  lcdAt(x, y, size, t);
}

void beepShort() {
  digitalWrite(BUZZER_PIN, HIGH);
  delay(50);
  digitalWrite(BUZZER_PIN, LOW);
}

// ============ Ekranlar ============
void drawSplash() {
  oled.clearDisplay();
  oled.setTextColor(SSD1306_WHITE);
  centered(10, 2, "BlueGrays");
  centered(40, 1, "IR Remote v1.0");
  oled.drawRoundRect(2, 2, 124, 60, 6, SSD1306_WHITE);
  oled.display();
}

void drawStatus() {
  oled.clearDisplay();
  oled.setTextColor(SSD1306_WHITE);

  lcdAt(0, 0, 1, "> IR Remote");
  oled.drawLine(0, 10, 127, 10, SSD1306_WHITE);

  // Merkez: büyük son tuş
  centered(14, 3, lastKey);
  // Alt açıklama
  centered(44, 1, lastAction);

  oled.drawLine(0, 53, 127, 53, SSD1306_WHITE);

  // Alt bilgi: LED durumu + toplam basım
  String leds = String(ledG ? "G" : "-") + String(ledY ? "Y" : "-") + String(ledR ? "R" : "-");
  lcdAt(0, 55, 1, "LED:" + leds);
  lcdAt(72, 55, 1, "Say:" + String(pressCount));

  oled.display();
}

// ============ Buton İşleme ============
void handleCommand(uint16_t cmd, uint32_t rawCode) {
  pressCount++;

  switch (cmd) {
    // PWR → tüm LED söner (master off)
    case 0xA2:
    case 0x45: lastKey = "PWR";
      ledG = ledY = ledR = false;
      digitalWrite(LED_GREEN, LOW);
      digitalWrite(LED_YELLOW, LOW);
      digitalWrite(LED_RED, LOW);
      lastAction = "Hepsi kapali"; break;

    // 1 → Yeşil LED toggle
    case 0x30:
    case 0x16: lastKey = "1";
      ledG = !ledG; digitalWrite(LED_GREEN, ledG);
      lastAction = ledG ? "Yesil ACIK" : "Yesil KAPALI"; break;

    // 2 → Sarı LED toggle
    case 0x18:
    case 0x19: lastKey = "2";
      ledY = !ledY; digitalWrite(LED_YELLOW, ledY);
      lastAction = ledY ? "Sari ACIK" : "Sari KAPALI"; break;

    // 3 → Kırmızı LED toggle
    case 0x7A:
    case 0x0D: lastKey = "3";
      ledR = !ledR; digitalWrite(LED_RED, ledR);
      lastAction = ledR ? "Kirmizi ACIK" : "Kirmizi KAPALI"; break;

    // 4-9 → OLED'de özel gösterim
    case 0x10:
    case 0x0C: lastKey = "4"; lastAction = "Ozel: 4"; break;

    case 0x38: lastKey = "5"; lastAction = "Ozel: 5"; break;

    case 0x09:
    case 0x5E: lastKey = "6"; lastAction = "Ozel: 6"; break;

    case 0x42:
    case 0x08: lastKey = "7"; lastAction = "Ozel: 7"; break;

    case 0x4A:
    case 0x1C: lastKey = "8"; lastAction = "Ozel: 8"; break;

    case 0x52:
    case 0x5A: lastKey = "9"; lastAction = "Ozel: 9"; break;

    // Volume
    case 0x02:
    case 0x46: lastKey = "V+"; lastAction = "Ses arttir"; break;

    case 0x98:
    case 0x44: lastKey = "V-"; lastAction = "Ses azalt"; break;

    // Bilinmeyen buton → Serial'da kodunu gör
    default:
      lastKey = "?";
      lastAction = "Kod: 0x" + String(cmd, HEX);
      break;
  }

  Serial.printf("[IR] cmd=0x%02X raw=0x%08lX -> %s (%s)\n",
                cmd, (unsigned long)rawCode, lastKey.c_str(), lastAction.c_str());

  beepShort();
  drawStatus();
}

// ============ SETUP ============
void setup() {
  Serial.begin(115200);

  pinMode(LED_GREEN, OUTPUT);
  pinMode(LED_YELLOW, OUTPUT);
  pinMode(LED_RED, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  digitalWrite(BUZZER_PIN, LOW);

  Wire.begin();
  if (!oled.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR)) {
    while (1);
  }

  drawSplash();
  delay(2500);

  IrReceiver.begin(IR_RECV_PIN, ENABLE_LED_FEEDBACK);
  Serial.println("IR Alici hazir, kumanda ile tetikleyin");

  drawStatus();
}

// ============ LOOP ============
void loop() {
  if (IrReceiver.decode()) {
    uint16_t cmd = IrReceiver.decodedIRData.command;
    uint32_t raw = IrReceiver.decodedIRData.decodedRawData;

    // Repeat frame'leri atla + debounce (aynı komut 300ms içinde tekrar gelmesin)
    bool isRepeat = (IrReceiver.decodedIRData.flags & IRDATA_FLAGS_IS_REPEAT);
    unsigned long now = millis();

    if (raw != 0 && !isRepeat && IrReceiver.decodedIRData.protocol != UNKNOWN) {
      if (cmd != lastCmd || (now - lastCmdMs > 300)) {
        handleCommand(cmd, raw);
        lastCmd = cmd;
        lastCmdMs = now;
      }
    }

    IrReceiver.resume();
  }
  delay(50);
}