// veilor-os Plymouth boot splash
// minimal: pure black background, centered "veilor" wordmark, single
// slowly-pulsing dot underneath. no fedora f, no spinning bar.
//
// Plymouth script reference: https://www.freedesktop.org/wiki/Software/Plymouth/Scripts/

// ── Background: pure black ──────────────────────────────────────────────
Window.SetBackgroundTopColor   (0.0, 0.0, 0.0);
Window.SetBackgroundBottomColor(0.0, 0.0, 0.0);

screen_w = Window.GetWidth();
screen_h = Window.GetHeight();

// ── Wordmark: render "veilor" as text via Plymouth's image API ──────────
// Image() with a string renders the system font. Color is white (216/255).
wordmark.image  = Image.Text("veilor", 0.847, 0.847, 0.847, 1.0, "Sans 28");
wordmark.sprite = Sprite(wordmark.image);
wordmark.sprite.SetX((screen_w - wordmark.image.GetWidth())  / 2);
wordmark.sprite.SetY((screen_h - wordmark.image.GetHeight()) / 2 - 12);
wordmark.sprite.SetOpacity(0.92);

// ── Pulse dot: single small white circle, opacity oscillates slowly ─────
// Build a 12x12 circle bitmap programmatically (no external assets needed).
dot_size = 12;
dot.image = Image("dot.png");
if (!dot.image) {
    // Plymouth can't draw arbitrary shapes from script; if dot.png is
    // missing, fall back to a small text bullet which the system font
    // will render as a centered glyph. Keeps the theme self-contained.
    dot.image = Image.Text("●", 0.847, 0.847, 0.847, 1.0, "Sans 18");
}
dot.sprite = Sprite(dot.image);
dot.sprite.SetX((screen_w - dot.image.GetWidth())  / 2);
dot.sprite.SetY((screen_h - dot.image.GetHeight()) / 2 + wordmark.image.GetHeight() / 2 + 18);

// ── Animation: slow opacity pulse on the dot ────────────────────────────
// Frame counter advances on every refresh tick (~50 Hz).
pulse_phase = 0;
fun refresh_callback() {
    pulse_phase++;
    // 240-tick cycle ≈ 4.8 s. sin-like via fractional triangle wave.
    cycle  = pulse_phase % 240;
    half   = 120;
    if (cycle < half)
        ratio = cycle / half;
    else
        ratio = (240 - cycle) / half;
    // map 0..1 to opacity 0.25..0.95
    opacity = 0.25 + ratio * 0.70;
    dot.sprite.SetOpacity(opacity);
}
Plymouth.SetRefreshFunction(refresh_callback);

// ── Progress bar from message_handler ───────────────────────────────────
// Plymouth sends progress messages during boot; we silently consume them
// without drawing a bar (to keep the splash clean). Override as needed.
fun message_callback(text) {
    // intentionally silent — keep splash uncluttered. Reserved for future
    // status-line overlay if requested.
}
Plymouth.SetMessageFunction(message_callback);

// ── Boot phase callbacks (no-op) ────────────────────────────────────────
fun boot_progress_callback(duration, progress) {
    // no progress bar by design — splash is intentionally static
}
Plymouth.SetBootProgressFunction(boot_progress_callback);

// ── Password prompt (LUKS unlock) ───────────────────────────────────────
// Required: when LUKS is unlocked at boot, plymouth shows a prompt.
// We render a minimal centered prompt under the dot.
prompt.label_image = NULL;
prompt.entry_image = NULL;

fun display_password_callback(prompt_text, bullets) {
    if (prompt.label_image)
        prompt.label_image = NULL;
    if (prompt.entry_image)
        prompt.entry_image = NULL;

    label_text = prompt_text;
    if (label_text == "") label_text = "passphrase";

    prompt.label_image = Image.Text(label_text, 0.63, 0.63, 0.63, 1.0, "Sans 12");
    prompt.label_sprite = Sprite(prompt.label_image);
    prompt.label_sprite.SetX((screen_w - prompt.label_image.GetWidth()) / 2);
    prompt.label_sprite.SetY(screen_h * 0.65);

    bullet_text = "";
    i = 0;
    while (i < bullets) {
        bullet_text += "•";
        i++;
    }
    if (bullet_text == "") bullet_text = " ";
    prompt.entry_image = Image.Text(bullet_text, 0.847, 0.847, 0.847, 1.0, "Sans 18");
    prompt.entry_sprite = Sprite(prompt.entry_image);
    prompt.entry_sprite.SetX((screen_w - prompt.entry_image.GetWidth()) / 2);
    prompt.entry_sprite.SetY(screen_h * 0.65 + 24);
}
Plymouth.SetDisplayPasswordFunction(display_password_callback);

fun display_normal_callback() {
    if (prompt.label_image)  { prompt.label_image  = NULL; prompt.label_sprite  = NULL; }
    if (prompt.entry_image)  { prompt.entry_image  = NULL; prompt.entry_sprite  = NULL; }
}
Plymouth.SetDisplayNormalFunction(display_normal_callback);

// ── Quit ────────────────────────────────────────────────────────────────
fun quit_callback() {
    wordmark.sprite.SetOpacity(0);
    dot.sprite.SetOpacity(0);
}
Plymouth.SetQuitFunction(quit_callback);