// ============================================================
//  MiniGames Console — ESP32-C3 Super Mini + OLED SSD1306
//  Inspired by Arduboy
// ============================================================
//
//  Controls:
//    UP/DOWN/LEFT/RIGHT — D-pad navigation & in-game control
//    MENU              — Return to main menu from any game
//    COLOR             — Toggle display invert (normal/inverted)
//
//  Games:
//    1. Snake     — Classic snake, eat food, grow longer
//    2. Pong      — Single player vs AI
//    3. Breakout  — Brick breaker with lives
//    4. Flappy    — Flappy Bird clone
//
// ============================================================

#include "config.h"
#include "input.h"
#include "display.h"
#include "menu.h"
#include "game_snake.h"
#include "game_pong.h"
#include "game_breakout.h"
#include "game_flappy.h"

// Current state
static GameState currentState = STATE_MENU;
static GameState previousState = STATE_MENU;
static unsigned long frameStart;

void setup() {
  Serial.begin(115200);
  Serial.println(F("MiniGames Console v1.0"));

  // Seed random
  randomSeed(analogRead(0) ^ micros());

  // Initialize subsystems
  inputInit();
  displayInit();

  // Show boot splash
  showSplash();

  // Initialize menu
  menuInit();
}

void loop() {
  frameStart = millis();

  // ── Read buttons ──
  inputUpdate();

  // ── State Machine ──
  GameState nextState = currentState;

  switch (currentState) {
    case STATE_MENU:
      nextState = menuUpdate();
      menuDraw();
      break;

    case STATE_SNAKE:
      nextState = snakeUpdate();
      snakeDraw();
      break;

    case STATE_PONG:
      nextState = pongUpdate();
      pongDraw();
      break;

    case STATE_BREAKOUT:
      nextState = breakoutUpdate();
      breakoutDraw();
      break;

    case STATE_FLAPPY:
      nextState = flappyUpdate();
      flappyDraw();
      break;
  }

  // ── Handle state transitions ──
  if (nextState != currentState) {
    previousState = currentState;
    currentState = nextState;

    // Initialize new state
    switch (currentState) {
      case STATE_MENU:
        menuInit();
        break;
      case STATE_SNAKE:
        snakeInit();
        break;
      case STATE_PONG:
        pongInit();
        break;
      case STATE_BREAKOUT:
        breakoutInit();
        break;
      case STATE_FLAPPY:
        flappyInit();
        break;
    }
  }

  // ── Frame rate limiter ──
  unsigned long elapsed = millis() - frameStart;
  if (elapsed < FRAME_TIME_MS) {
    delay(FRAME_TIME_MS - elapsed);
  }
}