<?php
/**
 * OpenStation asset registration.
 *
 * Registers all openstation CSS and JS handles with WordPress so they can
 * be enqueued from anywhere in the plugin (or by third parties).
 *
 * @package OpenStation
 */

defined( 'ABSPATH' ) || exit;

/**
 * Cache-buster for a stylesheet that `@import`s sub-sheets: the max
 * `filemtime` across the file AND everything it (transitively) imports.
 * Sub-sheet URLs carry no `?ver=` of their own, so the parent's stamp is
 * the only cache key the browser ever sees for the subtree — it must
 * move when any member changes.
 *
 * @param string $relative Stylesheet path relative to the plugin dir.
 * @param string $fallback Version to use when the file is missing.
 * @return string Version string.
 */
function openstation_css_subtree_version( $relative, $fallback ) {
	$root = OPENSTATION_DIR . $relative;
	if ( ! file_exists( $root ) ) {
		return (string) $fallback;
	}
	$max   = (int) filemtime( $root );
	$queue = array( $root );
	$seen  = array( $root => true );
	while ( ! empty( $queue ) ) {
		$file = array_pop( $queue );
		$css  = (string) file_get_contents( $file );
		if ( ! preg_match_all( '/@import\s+url\(\s*["\']?([^"\')\s]+)["\']?\s*\)/i', $css, $matches ) ) {
			continue;
		}
		foreach ( $matches[1] as $import ) {
			$path = dirname( $file ) . '/' . $import;
			if ( ! file_exists( $path ) || isset( $seen[ $path ] ) ) {
				continue;
			}
			$seen[ $path ] = true;
			$max           = max( $max, (int) filemtime( $path ) );
			$queue[]       = $path;
		}
	}
	return (string) $max;
}

/**
 * Registers the OpenStation CSS and JS handles.
 */
function openstation_register_assets() {
	$version = OPENSTATION_VERSION;
	$suffix  = openstation_asset_suffix();

	// `filemtime`-stamped version for built bundles. The plugin-wide
	// `OPENSTATION_VERSION` is bumped per release, but the bundles
	// iterate faster — without a per-file mtime stamp, two clients
	// loading the same `?ver=…` URL can be served different bytes
	// (whichever build was on disk at upload time). Stamping with the
	// file's modification time guarantees the URL changes whenever the
	// file does, so "is my fix deployed?" is answerable from the
	// network tab. Falls back to `$version` when the file is missing
	// (test envs that import this file before the build runs).
	$built_version = static function ( $relative ) use ( $version ) {
		$path = OPENSTATION_DIR . $relative;
		return file_exists( $path ) ? (string) filemtime( $path ) : $version;
	};

	// Styles.
	// `filemtime`-stamped, NOT the plugin-wide `$version`. This file
	// is the token catalogue every other sheet resolves `var()`s
	// against, and it changes whenever the palette does — which is a
	// lot more often than the plugin version is bumped. With a static
	// stamp the browser holds the old palette until a hard reload,
	// and the symptom is maddening: a themed shell where some
	// surfaces update and others don't.
	wp_register_style(
		'os-variables',
		OPENSTATION_URL . 'assets/css/variables.css',
		array(),
		$built_version( 'assets/css/variables.css' )
	);
	// `filemtime`-stamped so the `<link rel="stylesheet">` URL matches the
	// `<link rel="preload" as="style">` hint emitted by
	// `openstation_print_preload_hints()` (which stamps with filemtime).
	// Registering this with the plain `$version` instead produced two
	// different `?ver=` query strings for the same file, so the browser
	// never matched the preload to the stylesheet and logged "preloaded
	// but not used within a few seconds from the window's load event".
	wp_register_style(
		'openstation',
		OPENSTATION_URL . 'assets/css/desktop.css',
		array( 'os-variables' ),
		$built_version( 'assets/css/desktop.css' )
	);

	/*
	 * Window styles — one handle per sheet, chained by dependency.
	 *
	 * These used to be `@import url( … )`ed from `windows.css` under
	 * the single `os-windows` handle. That was a standing
	 * cache bug: an `@import` URL carries no `?ver=`, so a changed
	 * sub-sheet had no URL for the browser to invalidate. Stamping the
	 * PARENT with the subtree's max mtime (which is what
	 * `openstation_css_subtree_version()` was for) made the browser
	 * re-fetch `windows.css` and then request each sub-sheet at an
	 * unchanged URL — free to be served from its heuristic cache. The
	 * result was edits not landing until a hard refresh, and rules
	 * being relocated into `windows.css` purely to dodge it.
	 *
	 * Now every sheet is separately registered with its own
	 * `filemtime` stamp, so each has a real cache key.
	 *
	 * THE DEPENDENCY CHAIN IS LOAD-BEARING. WordPress prints
	 * dependencies before dependents, so chaining each sheet to the
	 * previous one reproduces the order the `@import` block had, and
	 * `os-windows` (which depends on the last link) still
	 * prints after them and still wins ties:
	 *
	 *   window-chrome → window-states → effects → window-links
	 *   → windows
	 *
	 * `window-overview` and `os-settings` are deliberately NOT in this
	 * chain — they are registered below, after `os-windows`,
	 * so they can load deferred. Adding a sheet here means splicing it
	 * into the chain, not appending an unrelated dependency: order is
	 * the contract.
	 */
	$window_sheets = array(
		'os-window-chrome' => 'assets/css/window-chrome.css',
		'os-window-states' => 'assets/css/window-states.css',
		'os-effects'       => 'assets/css/effects.css',
		'os-window-links'  => 'assets/css/window-links.css',
	);
	$previous      = array( 'os-variables', 'dashicons' );
	foreach ( $window_sheets as $handle => $relative ) {
		wp_register_style(
			$handle,
			OPENSTATION_URL . $relative,
			$previous,
			$built_version( $relative )
		);
		$previous = array( $handle );
	}

	// Entry point. Depends on the tail of the chain above, so
	// enqueuing this one handle still pulls in every critical window
	// sheet — the behaviour callers had when they were `@import`s.
	wp_register_style(
		'os-windows',
		OPENSTATION_URL . 'assets/css/windows.css',
		$previous,
		$built_version( 'assets/css/windows.css' )
	);
	// These two load DEFERRED (see `openstation_defer_non_critical_styles()`):
	// the UI they style — the OS Settings panel and the window
	// overview — is lazy-loaded JS that can never be on screen at
	// first paint, so ~47 KB of CSS has no business blocking render.
	// They depend on `os-windows` so they print after it,
	// preserving the cascade position they had as `@import`s.
	wp_register_style(
		'os-window-overview',
		OPENSTATION_URL . 'assets/css/window-overview.css',
		array( 'os-windows' ),
		$built_version( 'assets/css/window-overview.css' )
	);
	wp_register_style(
		'os-settings',
		OPENSTATION_URL . 'assets/css/os-settings.css',
		array( 'os-windows' ),
		$built_version( 'assets/css/os-settings.css' )
	);
	// Solo mode — one window, no desk around it. Loads last so it can
	// hide surfaces the sheets above declared, and only enqueues on a
	// solo request, so a normal shell never pays for it.
	wp_register_style(
		'os-solo',
		OPENSTATION_URL . 'assets/css/solo.css',
		array( 'os-windows' ),
		$built_version( 'assets/css/solo.css' )
	);
	wp_register_style(
		'os-dock',
		OPENSTATION_URL . 'assets/css/dock.css',
		array( 'os-variables', 'dashicons' ),
		$built_version( 'assets/css/dock.css' )
	);
	wp_register_style(
		'os-dock-peek',
		OPENSTATION_URL . 'assets/css/dock-peek.css',
		array( 'os-dock' ),
		$built_version( 'assets/css/dock-peek.css' )
	);
	// The notch — the shell's top-centre voice and the site
	// assistant's front door. Scoped to `.os-notch`.
	wp_register_style(
		'os-notch',
		OPENSTATION_URL . 'assets/css/notch.css',
		array( 'os-variables' ),
		$built_version( 'assets/css/notch.css' )
	);
	// Keyboard-shortcuts window. Scoped to `.os-shortcuts`, so it is
	// inert until the System menu opens the window, and unconditional
	// for the same reason the layout sheet is: the window can be
	// opened at any moment and a deferred sheet would paint it raw.
	wp_register_style(
		'os-shortcuts',
		OPENSTATION_URL . 'assets/css/shortcuts.css',
		array( 'os-variables' ),
		$built_version( 'assets/css/shortcuts.css' )
	);
	// The OpenStation desktop layout — the core/plugin seam on the rail
	// plus the constellation hover-submenu flyout. Both surfaces are
	// scoped (`[data-os-layout="openstation"]` / `.os-constellation`),
	// so the sheet is inert in every other layout and is loaded
	// unconditionally rather than gated on the user's current pick:
	// the layout is switchable live from OpenStation Preferences, and a
	// conditional enqueue would leave the first switch unstyled.
	wp_register_style(
		'os-openstation-layout',
		OPENSTATION_URL . 'assets/css/openstation-layout.css',
		array( 'os-dock' ),
		$built_version( 'assets/css/openstation-layout.css' )
	);
	// `filemtime`-stamped — the chromeless overrides iterate faster
	// than the plugin-wide version bumps (per-page compat shims and
	// page-title-action exceptions land in patches), and a stale
	// cached copy means the user sees yesterday's rules. Without the
	// stamp, the browser keeps `?ver=0.8.1` valid for the whole
	// release cycle.
	wp_register_style(
		'os-chromeless',
		OPENSTATION_URL . 'assets/css/chromeless.css',
		array( 'openstation' ),
		$built_version( 'assets/css/chromeless.css' )
	);

	// `filemtime`-stamped — the AI assistant surface (error states,
	// inline affordances) iterates faster than plugin version bumps.
	// Without an mtime stamp the browser keeps `?ver=<plugin-version>`
	// valid for the whole release cycle and the user keeps seeing
	// yesterday's CSS even after a hard reload.
	wp_register_style(
		'desktop-mode-ai-assistant',
		OPENSTATION_URL . 'assets/css/ai-assistant.css',
		array( 'os-variables' ),
		$built_version( 'assets/css/ai-assistant.css' )
	);

	wp_register_style(
		'desktop-mode-bug-report',
		OPENSTATION_URL . 'assets/css/bug-report.css',
		array( 'os-variables' ),
		$built_version( 'assets/css/bug-report.css' )
	);

	// `filemtime` instead of the plugin-wide `$version` for the
	// recycle-bin CSS — this file iterates faster than the bundle
	// and we never want a stale CSS cache to mask a real fix.
	$recycle_bin_css = OPENSTATION_DIR . 'assets/css/recycle-bin.css';
	wp_register_style(
		'desktop-mode-recycle-bin',
		OPENSTATION_URL . 'assets/css/recycle-bin.css',
		array( 'os-variables', 'dashicons' ),
		file_exists( $recycle_bin_css ) ? (string) filemtime( $recycle_bin_css ) : $version
	);

	// `filemtime` for the native Posts window CSS — same rationale as
	// the recycle-bin CSS: bundle iterates faster than the plugin
	// version and stale caches are worse than the cost of a 304.
	$posts_window_css = OPENSTATION_DIR . 'assets/css/posts-window.css';
	wp_register_style(
		'os-posts-window',
		OPENSTATION_URL . 'assets/css/posts-window.css',
		array( 'os-variables', 'dashicons' ),
		file_exists( $posts_window_css ) ? (string) filemtime( $posts_window_css ) : $version
	);

	// Native Plugins window CSS — same `filemtime`-cache-bust posture
	// as the Posts/Recycle Bin styles.
	$plugins_window_css = OPENSTATION_DIR . 'assets/css/plugins-window.css';
	wp_register_style(
		'os-plugins-window',
		OPENSTATION_URL . 'assets/css/plugins-window.css',
		array( 'os-variables', 'dashicons' ),
		file_exists( $plugins_window_css ) ? (string) filemtime( $plugins_window_css ) : $version
	);

	// Native Comments window CSS — same `filemtime` posture.
	$comments_window_css = OPENSTATION_DIR . 'assets/css/comments-window.css';
	wp_register_style(
		'os-comments-window',
		OPENSTATION_URL . 'assets/css/comments-window.css',
		array( 'os-variables', 'dashicons' ),
		file_exists( $comments_window_css ) ? (string) filemtime( $comments_window_css ) : $version
	);

	// Files-on-the-Desktop tile + layer styles. `filemtime` for the
	// same reason as the recycle-bin / posts-window CSS: this file
	// iterates faster than the plugin version, and a stale cache
	// would mask a real fix.
	$desktop_files_css = OPENSTATION_DIR . 'assets/css/desktop-files.css';
	wp_register_style(
		'os-files',
		OPENSTATION_URL . 'assets/css/desktop-files.css',
		array( 'os-variables', 'dashicons' ),
		file_exists( $desktop_files_css ) ? (string) filemtime( $desktop_files_css ) : $version
	);

	// Games hub window (launcher grid, scoreboard, challenges) +
	// per-game styles. Same `filemtime` cache-bust posture as the
	// other fast-iterating feature stylesheets.
	$games_css = OPENSTATION_DIR . 'assets/css/games.css';
	wp_register_style(
		'desktop-mode-games',
		OPENSTATION_URL . 'assets/css/games.css',
		array( 'os-variables', 'dashicons' ),
		file_exists( $games_css ) ? (string) filemtime( $games_css ) : $version
	);
	$game_inkfall_css = OPENSTATION_DIR . 'assets/css/game-inkfall.css';
	wp_register_style(
		'os-game-inkfall',
		OPENSTATION_URL . 'assets/css/game-inkfall.css',
		array( 'os-variables' ),
		file_exists( $game_inkfall_css ) ? (string) filemtime( $game_inkfall_css ) : $version
	);
	$game_alphabet_soup_css = OPENSTATION_DIR . 'assets/css/game-alphabet-soup.css';
	wp_register_style(
		'os-game-alphabet-soup',
		OPENSTATION_URL . 'assets/css/game-alphabet-soup.css',
		array( 'os-variables' ),
		file_exists( $game_alphabet_soup_css ) ? (string) filemtime( $game_alphabet_soup_css ) : $version
	);

	// Pinned-notes layer styles (paper, pushpin, pastel tokens, pin
	// animations). Same `filemtime` cache-bust posture as the other
	// fast-iterating feature stylesheets above. Depends on `os-files`
	// because a pinned note dresses the canonical `.os-file-tile`
	// chrome — anything that restyles a tile has to print after the
	// file that declares one.
	$notes_css = OPENSTATION_DIR . 'assets/css/notes.css';
	wp_register_style(
		'os-notes',
		OPENSTATION_URL . 'assets/css/notes.css',
		array( 'os-variables', 'dashicons', 'os-files' ),
		file_exists( $notes_css ) ? (string) filemtime( $notes_css ) : $version
	);

	// Announcement-dialog styles (scrim, hero card, buttons). Registered
	// always, enqueued only for a user who is actually owed the
	// announcement — see the gate in `openstation_enqueue_assets()`. It
	// is not lazy-loaded on top of that: on the one boot where it does
	// go out, the dialog opens from the main bundle a second later, and
	// a fetch racing that would show an unstyled card.
	$announce_css = OPENSTATION_DIR . 'assets/css/announce.css';
	wp_register_style(
		'os-announce',
		OPENSTATION_URL . 'assets/css/announce.css',
		array( 'os-variables' ),
		file_exists( $announce_css ) ? (string) filemtime( $announce_css ) : $version
	);

	// Scripts.
	//
	// `wp-hooks` — the shell exposes a WordPress-style filter/action
	// API (`window.wp.hooks`) to third-party plugins.
	// `wp-i18n` — the TS `__()` / `_x()` / `sprintf()` wrappers in
	// `src/i18n.ts` delegate to `window.wp.i18n` for translation
	// lookups. Both handles are core-shipped but only pre-enqueued
	// when Gutenberg-adjacent deps pull them in, so we list them
	// explicitly to guarantee load order.
	wp_register_script(
		'openstation',
		OPENSTATION_URL . 'assets/js/desktop' . $suffix . '.js',
		// `heartbeat` + `jquery` — the recycle-bin badge module
		// (loaded as part of this bundle) opts into the WordPress
		// Heartbeat API so the count tile / desktop-icon badge
		// stays in sync even when the bin window is closed.
		array( 'wp-hooks', 'wp-i18n', 'heartbeat', 'jquery' ),
		$built_version( 'assets/js/desktop' . $suffix . '.js' ),
		// Footer + defer: the shell boots on DOMContentLoaded anyway,
		// so deferring frees the parser instead of blocking at the
		// footer print point. Both inline payloads attached to this
		// handle (`__openStationMenuCommands`, the jazz-quote version
		// stamp) are `'before'`-position, which WP keeps as blocking
		// inline ahead of a deferred tag — order is preserved. On WP
		// < 6.3 the array collapses to a truthy `$in_footer`, same as
		// before.
		array(
			'in_footer' => true,
			'strategy'  => 'defer',
		)
	);

	// `os-iframe-bridge` — opt-in iframe-side bridge that
	// provides `wp.os.iframe.publish/subscribe/onConnection/
	// requestConnection` to any same-origin iframe that enqueues it.
	// Same code is also injected inline by the chromeless bridge
	// (so chromeless wp-admin pages don't need a separate enqueue)
	// and auto-injected when a native window opts in via
	// `iframeContent: { bridge: true }`. Plugins targeting their
	// own iframe pages just enqueue this handle.
	wp_register_script(
		'os-iframe-bridge',
		OPENSTATION_URL . 'assets/js/iframe-bridge' . $suffix . '.js',
		array(),
		$built_version( 'assets/js/iframe-bridge' . $suffix . '.js' ),
		true
	);

	// `os-gutenberg-drop-receiver` — iframe-side bundle
	// enqueued only on the Block Editor screens (`post.php` /
	// `post-new.php`) for openstation users. Listens for
	// `os-drop` postMessages from the parent shell (see
	// `src/drag/iframe-drop-targets.ts`) and inserts the matching
	// Gutenberg block via `wp.data.dispatch('core/block-editor')`.
	// Depends on `wp-blocks` + `wp-data` so the editor stores are
	// guaranteed enqueued before the receiver runs its first message
	// handler.
	wp_register_script(
		'os-gutenberg-drop-receiver',
		OPENSTATION_URL . 'assets/js/gutenberg-drop-receiver' . $suffix . '.js',
		array( 'wp-blocks', 'wp-data' ),
		$built_version( 'assets/js/gutenberg-drop-receiver' . $suffix . '.js' ),
		true
	);

	// `desktop-mode-recycle-bin` — small bundle for the Recycle Bin
	// native window. Lazy-loaded by the native-window sync the first
	// time the bin opens; registers a render callback on
	// `window.openStationNativeWindows['desktop-mode-recycle-bin']`.
	$recycle_bin_js = OPENSTATION_DIR . 'assets/js/recycle-bin' . $suffix . '.js';
	wp_register_script(
		'desktop-mode-recycle-bin',
		OPENSTATION_URL . 'assets/js/recycle-bin' . $suffix . '.js',
		// `heartbeat` + `jquery` — the bin opts in to the WordPress
		// Heartbeat API while its window is open as the catch-all
		// real-time channel for deletes that don't render an admin
		// footer (REST/AJAX/other tabs/WP-CLI). See
		// `src/recycle-bin/realtime.ts` for the subscriber.
		array( 'wp-i18n', 'heartbeat', 'jquery' ),
		file_exists( $recycle_bin_js ) ? (string) filemtime( $recycle_bin_js ) : $version,
		true
	);
	wp_set_script_translations(
		'desktop-mode-recycle-bin',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);

	// `desktop-mode-games` — bundle for the Games hub native window
	// (launcher grid, scoreboard, challenges client). Lazy-loaded by
	// the native-window sync the first time the hub opens; registers a
	// render callback on
	// `window.openStationNativeWindows['desktop-mode-games']`.
	// `heartbeat` + `jquery` — the challenges client rides the
	// WordPress Heartbeat bus for live delivery.
	$games_js = OPENSTATION_DIR . 'assets/js/games' . $suffix . '.js';
	wp_register_script(
		'desktop-mode-games',
		OPENSTATION_URL . 'assets/js/games' . $suffix . '.js',
		array( 'wp-i18n', 'heartbeat', 'jquery' ),
		file_exists( $games_js ) ? (string) filemtime( $games_js ) : $version,
		true
	);
	wp_set_script_translations(
		'desktop-mode-games',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);

	// `os-game-inkfall` — the Inkfall game bundle. Loaded
	// lazily by the games framework on first launch; publishes the
	// game def on `window.openStationGames.inkfall`.
	$game_inkfall_js = OPENSTATION_DIR . 'assets/js/game-inkfall' . $suffix . '.js';
	wp_register_script(
		'os-game-inkfall',
		OPENSTATION_URL . 'assets/js/game-inkfall' . $suffix . '.js',
		array( 'wp-i18n' ),
		file_exists( $game_inkfall_js ) ? (string) filemtime( $game_inkfall_js ) : $version,
		true
	);
	wp_set_script_translations(
		'os-game-inkfall',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);

	// `os-game-alphabet-soup` — the Alphabet Soup game
	// bundle. Loaded lazily by the games framework on first launch;
	// publishes the game def on
	// `window.openStationGames['alphabet-soup']`.
	$game_alphabet_soup_js = OPENSTATION_DIR . 'assets/js/game-alphabet-soup' . $suffix . '.js';
	wp_register_script(
		'os-game-alphabet-soup',
		OPENSTATION_URL . 'assets/js/game-alphabet-soup' . $suffix . '.js',
		array( 'wp-i18n' ),
		file_exists( $game_alphabet_soup_js ) ? (string) filemtime( $game_alphabet_soup_js ) : $version,
		true
	);
	wp_set_script_translations(
		'os-game-alphabet-soup',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);

	// `os-posts-window` — small bundle for the native Posts
	// window. Lazy-loaded by the native-window sync the first time the
	// window opens (via the dock-click swap when the user opts in);
	// registers a render callback on
	// `window.openStationNativeWindows['desktop-mode-posts']`.
	$posts_window_js = OPENSTATION_DIR . 'assets/js/posts-window' . $suffix . '.js';
	wp_register_script(
		'os-posts-window',
		OPENSTATION_URL . 'assets/js/posts-window' . $suffix . '.js',
		array( 'wp-i18n' ),
		file_exists( $posts_window_js ) ? (string) filemtime( $posts_window_js ) : $version,
		true
	);
	wp_set_script_translations(
		'os-posts-window',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);

	// `os-plugins-window` — small bundle for the native
	// Plugins window. Lazy-loaded by the native-window sync the first
	// time the window opens (via the dock-click swap when the user
	// opts in); registers a render callback on
	// `window.openStationNativeWindows['desktop-mode-plugins']`.
	$plugins_window_js = OPENSTATION_DIR . 'assets/js/plugins-window' . $suffix . '.js';
	wp_register_script(
		'os-plugins-window',
		OPENSTATION_URL . 'assets/js/plugins-window' . $suffix . '.js',
		array( 'wp-i18n' ),
		file_exists( $plugins_window_js ) ? (string) filemtime( $plugins_window_js ) : $version,
		true
	);
	wp_set_script_translations(
		'os-plugins-window',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);

	// `os-comments-window` — small bundle for the native
	// Comments window. Lazy-loaded by the native-window sync the first
	// time the window opens (via the dock-click swap when the user
	// opts in); registers a render callback on
	// `window.openStationNativeWindows['desktop-mode-comments']`.
	$comments_window_js = OPENSTATION_DIR . 'assets/js/comments-window' . $suffix . '.js';
	wp_register_script(
		'os-comments-window',
		OPENSTATION_URL . 'assets/js/comments-window' . $suffix . '.js',
		array( 'wp-i18n' ),
		file_exists( $comments_window_js ) ? (string) filemtime( $comments_window_js ) : $version,
		true
	);
	wp_set_script_translations(
		'os-comments-window',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);

	// `os-animated-logo-wallpaper` — built-in PixiJS canvas
	// wallpaper, moved out of `desktop.min.js`. The wallpaper
	// `server-sync` loads this handle when the user selects the
	// `wp-animated-logo` wallpaper (or opens OS Settings → Wallpaper
	// and the picker pulls every registered canvas def in). The
	// bundle's only side effect is publishing the `WallpaperDef` on
	// `window.openStationWallpapers['wp-animated-logo']`.
	$animated_logo_js = OPENSTATION_DIR . 'assets/js/animated-logo-wallpaper' . $suffix . '.js';
	wp_register_script(
		'os-animated-logo-wallpaper',
		OPENSTATION_URL . 'assets/js/animated-logo-wallpaper' . $suffix . '.js',
		array( 'wp-hooks' ),
		file_exists( $animated_logo_js ) ? (string) filemtime( $animated_logo_js ) : $version,
		true
	);

	// `os-snow-wallpaper` — built-in PixiJS canvas
	// wallpaper: snowfall that accumulates on window tops and melts
	// away. Same lazy-load path as the animated logo: the wallpaper
	// `server-sync` injects this handle when the user selects the
	// `wp-snow` wallpaper (or opens OS Settings → Wallpaper and the
	// picker pulls the def in). The bundle's only side effect is
	// publishing the `WallpaperDef` on
	// `window.openStationWallpapers['wp-snow']`.
	$snow_js = OPENSTATION_DIR . 'assets/js/snow-wallpaper' . $suffix . '.js';
	wp_register_script(
		'os-snow-wallpaper',
		OPENSTATION_URL . 'assets/js/snow-wallpaper' . $suffix . '.js',
		array( 'wp-hooks', 'wp-i18n' ),
		file_exists( $snow_js ) ? (string) filemtime( $snow_js ) : $version,
		true
	);
	wp_set_script_translations(
		'os-snow-wallpaper',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);

	// `desktop-mode-ai-assistant` — AI Copilot spotlight overlay,
	// moved out of `desktop.min.js`. The main bundle ships a
	// stub matching the public `wp.os.ai` contract; the stub
	// `<script>`-injects this handle the first time the user opens
	// the assistant (Cmd+K or admin-bar button).
	$ai_assistant_js = OPENSTATION_DIR . 'assets/js/ai-assistant' . $suffix . '.js';
	wp_register_script(
		'desktop-mode-ai-assistant',
		OPENSTATION_URL . 'assets/js/ai-assistant' . $suffix . '.js',
		array( 'wp-hooks', 'wp-i18n' ),
		file_exists( $ai_assistant_js ) ? (string) filemtime( $ai_assistant_js ) : $version,
		true
	);
	wp_set_script_translations(
		'desktop-mode-ai-assistant',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);

	// Wire the translation bundle to this script handle. WP looks
	// for `languages/os-{locale}-os.json` and
	// injects its `locale_data` into `wp.i18n` just before the
	// script runs — so every `__()` call resolves to the right
	// language without any runtime fetch.
	wp_set_script_translations(
		'openstation',
		'desktop-mode',
		OPENSTATION_DIR . 'languages'
	);
}
add_action( 'init', 'openstation_register_assets' );