// Screen size
screen.w = Window.GetWidth();
screen.h = Window.GetHeight();
screen.half.w = Window.GetWidth() / 2;
screen.half.h = Window.GetHeight() / 2;

// Logo
logo.image = Image("logo.png");
logo.originalImage = Image("logo.png");
logo.sprite = Sprite();

// BG
Window.SetBackgroundTopColor(0.18, 0.20, 0.25);
Window.SetBackgroundBottomColor(0.18, 0.20, 0.25);

// Progress bar
loading.image = Image("progress.png");
loading.originalImage = Image("progress.png");
loading.sprite = Sprite();
loading.sprite.SetY(screen.h - 1);
loading.sprite.SetX(0);

// Question prompt
question = null;
answer = null;

// Message
message = null;

// Password prompt
bullets = null;
prompt = null;
bullet.image = Image.Text("*", 1, 1, 1);

// Flow
state.status = "play";
state.time = 0.0;

//--------------------------------- Refresh (Logo animation) --------------------------
fun RefreshCallback() {
    if (state.status == "play")
        speed = 5;
    else
        speed = 1;

    if (Plymouth.GetMode() == "shutdown")
        opacity = 1 - global.progress * 3;
    else
        opacity = 1;

    sin = Math.Sin(state.time * speed) * 0.05;
    if (sin < 0)
        sin *= 2;
    s = Math.Abs(sin) + 0.3;

    logo.image = logo.originalImage.Scale(
        logo.originalImage.GetWidth() * s,
        logo.originalImage.GetHeight() * s
    );
    logo.sprite.SetImage(logo.image);
    logo.sprite.SetX(screen.half.w - logo.image.GetWidth() / 2);
    logo.sprite.SetY(screen.half.h - logo.image.GetHeight() / 2);
    logo.sprite.SetOpacity(opacity);

    loading.image = loading.originalImage.Scale(global.progress * screen.w, 1);
    loading.sprite.SetImage(loading.image);
}
Plymouth.SetRefreshFunction(RefreshCallback);

//------------------------------------- Password prompt -------------------------------
fun DisplayQuestionCallback(prompt, entry) {
    question = null;
    answer = null;

    if (entry == "")
        entry = "<answer>";

    question.image = Image.Text(prompt, 1, 1, 1);
    question.sprite = Sprite(question.image);
    question.sprite.SetX(screen.half.w - question.image.GetWidth() / 2);
    question.sprite.SetY(screen.h - 4 * question.image.GetHeight());

    answer.image = Image.Text(entry, 1, 1, 1);
    answer.sprite = Sprite(answer.image);
    answer.sprite.SetX(screen.half.w - answer.image.GetWidth() / 2);
    answer.sprite.SetY(screen.h - 2 * answer.image.GetHeight());
}
Plymouth.SetDisplayQuestionFunction(DisplayQuestionCallback);

//------------------------------------- Password prompt -------------------------------
fun DisplayPasswordCallback(nil, bulletCount) {
    state.status = "pause";
    totalWidth = bulletCount * bullet.image.GetWidth();
    startPos = screen.half.w - totalWidth / 2;

    prompt.image = Image.Text("enter password:", 1, 1, 1);
    prompt.sprite = Sprite(prompt.image);
    prompt.sprite.SetX(screen.half.w - prompt.image.GetWidth() / 2);
    prompt.sprite.SetY(screen.h - 4 * prompt.image.GetHeight());

    // Clear all bullets (user might hit backspace)
    bullets = null;
    for (i = 0; i < bulletCount; i++) {
        bullets[i].sprite = Sprite(bullet.image);
        bullets[i].sprite.SetX(startPos + i * bullet.image.GetWidth());
        bullets[i].sprite.SetY(screen.h - 2 * bullet.image.GetHeight());
    }
}
Plymouth.SetDisplayPasswordFunction(DisplayPasswordCallback);

//--------------------------- Normal display (unset all text) ----------------------
fun DisplayNormalCallback() {
    state.status = "play";
    bullets = null;
    prompt = null;
    message = null;
    question = null;
    answer = null;
}
Plymouth.SetDisplayNormalFunction(DisplayNormalCallback);

//----------------------------------------- Progress --------------------------------
fun ProgressCallback(duration, progress) {
    global.progress = progress;
    state.time = duration;
}
Plymouth.SetBootProgressFunction(ProgressCallback);

//----------------------------------------- Message --------------------------------
fun MessageCallback(text) {
    message.image = Image.Text(text, 1, 1, 1);
    message.sprite = Sprite(message.image);
    message.sprite.SetPosition(screen.half.w - message.image.GetWidth() / 2, message.image.GetHeight());
}
Plymouth.SetMessageFunction(MessageCallback);