/*
 * ========================================================
 * DUAL OLED DISPLAY - ESP32
 * ========================================================
 * 
 * Hardware Configuration:
 * - Board: ESP32
 * - Display 1 (Video): SSD1306 OLED 128x64 @ I2C 0x3C
 * - Display 2 (Lirik/Foto): SSD1306 OLED 128x64 @ I2C 0x3D
 * 
 * Wiring:
 * - SDA: GPIO 21 (default ESP32)
 * - SCL: GPIO 22 (default ESP32)
 * - Both displays share the same I2C bus
 * 
 * Libraries Required:
 * - Adafruit GFX Library
 * - Adafruit SSD1306
 * 
 * ========================================================
 */

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "VideoFrameDisplay1.h"  // Data untuk Display 1 (Video)
#include "VideoFrameDisplay2.h"  // Data untuk Display 2 (Lirik/Foto)

// ========================================================
// KONFIGURASI LAYAR
// ========================================================
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1

// Alamat I2C untuk masing-masing layar
#define DISPLAY1_ADDRESS 0x3C  // Layar 1: Video
#define DISPLAY2_ADDRESS 0x3D  // Layar 2: Lirik/Foto

// ========================================================
// INISIALISASI OBJEK DISPLAY
// ========================================================
Adafruit_SSD1306 display1(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Adafruit_SSD1306 display2(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// ========================================================
// VARIABEL UNTUK TRACKING FRAME
// ========================================================
unsigned long previousMillis1 = 0;
unsigned long previousMillis2 = 0;
int currentFrame1 = 0;
int currentFrame2 = 0;

// ========================================================
// SETUP - Dijalankan sekali saat startup
// ========================================================
void setup() {
  Serial.begin(115200);
  Serial.println("\n========================================");
  Serial.println("ESP32 Dual OLED Display - Starting...");
  Serial.println("========================================");

  // Set I2C speed ke 800 kHz untuk performa optimal
  Wire.setClock(800000);
  delay(100);

  // Inisialisasi Display 1 (0x3C - Video)
  Serial.print("Initializing Display 1 (0x3C)... ");
  if(!display1.begin(SSD1306_SWITCHCAPVCC, DISPLAY1_ADDRESS)) {
    Serial.println("FAILED!");
    Serial.println("Display 1 tidak terdeteksi pada alamat 0x3C");
    Serial.println("Periksa koneksi I2C dan alamat display!");
    while(1); // Berhenti jika display 1 gagal
  }
  Serial.println("OK!");

  // Inisialisasi Display 2 (0x3D - Lirik/Foto)
  Serial.print("Initializing Display 2 (0x3D)... ");
  if(!display2.begin(SSD1306_SWITCHCAPVCC, DISPLAY2_ADDRESS)) {
    Serial.println("FAILED!");
    Serial.println("Display 2 tidak terdeteksi pada alamat 0x3D");
    Serial.println("Periksa koneksi I2C dan alamat display!");
    while(1); // Berhenti jika display 2 gagal
  }
  Serial.println("OK!");

  // Clear kedua display
  display1.clearDisplay();
  display1.display();
  display2.clearDisplay();
  display2.display();

  // Tampilkan info frame
  Serial.println("\n========================================");
  Serial.println("Configuration:");
  Serial.println("========================================");
  Serial.print("Display 1 - Total Frames: ");
  Serial.println(TOTAL_FRAMES_1);
  Serial.print("Display 1 - Frame Delay: ");
  Serial.print(FRAME_DELAY_1);
  Serial.println(" ms");
  Serial.print("Display 2 - Total Frames: ");
  Serial.println(TOTAL_FRAMES_2);
  Serial.print("Display 2 - Frame Delay: ");
  Serial.print(FRAME_DELAY_2);
  Serial.println(" ms");
  Serial.println("========================================");
  Serial.println("Starting video playback...\n");
}

// ========================================================
// LOOP - Dijalankan berulang-ulang
// ========================================================
void loop() {
  unsigned long currentMillis = millis();

  // ========================================
  // Update Display 1 (Video)
  // ========================================
  if (currentMillis - previousMillis1 >= FRAME_DELAY_1) {
    previousMillis1 = currentMillis;

    display1.clearDisplay();
    display1.drawBitmap(0, 0, video_frames_1[currentFrame1], SCREEN_WIDTH, SCREEN_HEIGHT, WHITE);
    display1.display();

    currentFrame1++;
    if (currentFrame1 >= TOTAL_FRAMES_1) {
      currentFrame1 = 0;  // Loop kembali ke frame 0
    }
  }

  // ========================================
  // Update Display 2 (Lirik/Foto)
  // ========================================
  if (currentMillis - previousMillis2 >= FRAME_DELAY_2) {
    previousMillis2 = currentMillis;

    display2.clearDisplay();
    display2.drawBitmap(0, 0, video_frames_2[currentFrame2], SCREEN_WIDTH, SCREEN_HEIGHT, WHITE);
    display2.display();

    currentFrame2++;
    if (currentFrame2 >= TOTAL_FRAMES_2) {
      currentFrame2 = 0;  // Loop kembali ke frame 0
    }
  }

  // Optional: Print status setiap 1 detik
  static unsigned long lastPrint = 0;
  if (currentMillis - lastPrint >= 1000) {
    lastPrint = currentMillis;
    Serial.print("Display 1 Frame: ");
    Serial.print(currentFrame1);
    Serial.print("/");
    Serial.print(TOTAL_FRAMES_1);
    Serial.print(" | Display 2 Frame: ");
    Serial.print(currentFrame2);
    Serial.print("/");
    Serial.println(TOTAL_FRAMES_2);
  }
}