<?php
namespace Aumframe;

if (!defined('ABSPATH')) {
    exit;
}

class Plugin
{
    public const LATE_BASE_CSS = ':where(.af-root a.af-node){display:flex;flex-direction:column;}'
        . ':where(.af-root .af-carousel-dot){width:10px;height:10px;padding:0;border:0;border-radius:999px;cursor:pointer;background:color-mix(in srgb,currentColor 35%,transparent);transition:background .2s;}'
        . ':where(.af-root .af-carousel-dot[data-af-current]){background:var(--af-color-brand,currentColor);}'
        . ':where(.af-root [data-af-role=prev][disabled],.af-root [data-af-role=next][disabled]){opacity:.35;cursor:default;}'
        . '.af-root [data-af-role=track]{overflow-x:auto;overflow-y:hidden;scroll-snap-type:x mandatory;scrollbar-width:none;}'
        . '.af-root [data-af-role=track]>*{flex:0 0 100%;scroll-snap-align:start;}'
        . ':where(.af-root .af-embed){display:block;width:100%;border:0;}'
        . ':where(.af-root .af-embed-consent){display:block;position:relative;overflow:hidden;background:color-mix(in srgb,currentColor 6%,transparent);}'
        . ':where(.af-root .af-embed-load){display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;width:100%;height:100%;min-height:120px;padding:24px;text-align:center;cursor:pointer;}'
        . ':where(.af-root .af-embed-label){font-weight:600;}'
        . ':where(.af-root .af-embed-note){font-size:.82em;opacity:.7;max-width:34em;}';

    public static function current_url(): string
    {
        global $wp;
        if (is_singular() && get_permalink()) {
            return (string) get_permalink();
        }
        $request = isset($wp->request) ? (string) $wp->request : '';
        return (string) home_url(add_query_arg([], $request));
    }

    public static function boot(): void
    {
        Storage::maybe_upgrade();
        Library::maybe_install();

        // After a kit import the permalink structure has changed, but a flush at that moment has no
        // effect (see Kit\Importer). Deferred to here: by now every CPT and taxonomy is registered
        // according to the new settings.
        add_action('init', function () {
            if (get_option('aumframe_kit_needs_flush')) {
                delete_option('aumframe_kit_needs_flush');
                flush_rewrite_rules(false);
            }
        }, 999);

        // ---- Full-page takeover (project docs 5.0) ----
        // Note: get_header() and get_footer() are never called, so the theme's header.php never
        // executes at all — which is where "zero theme dependency" comes from.
        add_filter('template_include', [self::class, 'take_over'], 999);

        add_action('wp_enqueue_scripts', [self::class, 'enqueue_front']);

        Meta::boot();
        Rest::boot();
        /*
         * Shortcodes moved out of the AumCreate theme (1.9.0). Registered on both front end and admin:
         * the editor's preview renders them too, and `do_shortcode()` runs wherever content is asked for.
 */
        Shortcodes\Pagination::boot();
        Shortcodes\Audio::boot();
        Shortcodes\ThemeToggle::boot();
        Shortcodes\Search::boot();
        Shortcodes\Form::boot();
        Shortcodes\Catalog::boot();
        Shortcodes\Interactions::boot();
        ContentTypes::boot();
        Forms\Feature::boot();
        Model\Feature::boot();

        foreach (glob(AUMFRAME_DIR . 'src/Kit/adapters/*.php') as $aumframe_kit_adapter) {
            require_once $aumframe_kit_adapter;
        }


        if (is_admin()) {
            require_once AUMFRAME_DIR . 'src/Integrations/aumviso-seed.php';
        }
        Interactions\Feature::boot();
        Stats\Views::boot();
        Catalog\Catalog::boot();
        ScreenedRequest::boot();
        if (is_admin()) {
            Admin::boot();
            Kit\Screen::boot();
            Editor::boot();
            I18nAdmin::boot();
            PageLink::boot();
        }
    }

    /**
     * On a match, swap in our blank canvas; otherwise hand the request straight back to the theme.
     * This is opt-in: a site can run some pages through Aumframe and the rest through the theme.
 */
    public static function take_over(string $template): string
    {
        if (is_admin() || is_feed() || is_embed()) {
            return $template;
        }
        if (!Router::match()) {
            return $template;
        }
        return AUMFRAME_DIR . 'templates/canvas.php';
    }

    /**
     * Emit a script as <script type="module">.
     *
     * Note: wp_script_add_data($handle, 'type', 'module') does nothing — WP_Scripts does not read
     * that key, the script is still emitted as an ordinary one, top-level await and import inside it
     * become syntax errors, and not one line of the file executes.
     * The script_loader_tag filter is the version-independent way to do it.
 */
    public static function as_module(string $handle): void
    {
        add_filter('script_loader_tag', static function ($tag, $tag_handle) use ($handle) {
            if ($tag_handle !== $handle || strpos($tag, 'type="module"') !== false) {
                return $tag;
            }

            // Change only the tag carrying src. WP splices inline scripts from
            // wp_add_inline_script('before') into the same $tag, and a naive
            // str_replace('<script ') would hit the inline one — which would trap window.AUMFRAME in
            // module scope, unreachable globally, while the actual module script went unchanged.
            return preg_replace_callback(
                '#<script\b([^>]*\bsrc=[^>]*)>#i',
                static function ($m) {
                    $attrs = preg_replace('/\stype=([\'"])[^\'"]*\1/', '', $m[1]);
                    return '<script type="module"' . $attrs . '>';
                },
                $tag,
                1
            );
        }, 10, 2);
    }

    public static function enqueue_front(): void
    {
        /*
         *  The test is "will anything Aumframe renders appear on this page", **not "did a template
         * match"**.
         *
         * The site shell now also appears on pages where no template matches — the theme's
         * header.php and footer.php call Renderer::shell_parts() (Woo's cart, checkout and account
         * pages, 404, search and third-party plugin pages all take this path). Looking only at
         * Router::match() means the shell's HTML appears on those pages while **neither the CSS nor the
         * motion runtime is loaded** — the header becomes a column of unstyled text, and nothing is
         * reported. (Found on the cart page on 2026-08-22.)
         *
         * Router::shell() rather than shell_parts(): the former only checks whether a shell template
         * exists, while the latter actually renders it — unnecessary during enqueue.
 */
        if (!Router::match() && !Router::shell()) {
            return;
        }

        /*
         * The switch for entrance initial states.
         *
         * The initial states in the baked CSS (opacity:0) all hang off `html.af-anim`, and this script
         * adds that class before first paint — it has to be inline and in wp_head, because the
         * runtime is a type="module" script in the footer and therefore **inherently runs after first
         * paint**. Without this step, every section with an entrance goes "visible → hidden by JS →
         * fade in", which is a flash of content.
         *
         *  Two safety nets, both required:
         * 1. JS disabled entirely → this script never runs → the class is never added → the content is
         *    visible as-is.
         * 2. JS runs but the runtime fails to load (network, CDN, an error) → a 3-second fuse removes
         *    the class. Once the runtime is up it clears that timer.
         *
         * Without both, "the animation broke" escalates into "the content is invisible forever".
 */
        add_action('wp_head', static function () {
            wp_register_script('aumframe-anim', false, [], AUMFRAME_VERSION, false);
            wp_enqueue_script('aumframe-anim');
            wp_add_inline_script('aumframe-anim',
                "(function(d){var h=d.documentElement;h.className+=' af-anim';"
                . "window.__afAnimFuse=setTimeout(function(){"
                . "h.className=h.className.replace(/\\s*\\baf-anim\\b/,'');},3000);})(document);"
            );
            /*
             *  The priority cannot be 1.
             *
             * This method is itself a wp_enqueue_scripts callback, and that hook fires at **wp_head
             * priority 1** — so at the moment of registration, priority 1 is already running, and adding
             * another priority-1 callback to it never executes. The symptom: the initial states are
             * emitted in the CSS as usual while nobody ever adds the af-anim class, so the rules never
             * match — the fix does nothing, and the page looks entirely fine.
 */
        }, 2);

        // Site palette first, scene CSS second. The order does not actually matter (the site palette is
        // in a cascade layer and unlayered scene tokens always win), but reading order matching priority
        // saves the next person from rearranging it.
        $css = SiteTokens::css();

        // The baked CSS is inlined: it is specific to this page, and an external file would only add a
        // round trip.
        $css .= Renderer::css();

        if ($css !== '') {
            $css .= "\n" . self::LATE_BASE_CSS;
        }
        if ($css !== '') {
            // Inline styles have no file, so the plugin version suffices — the content is emitted with
            // the page every time
            wp_register_style('aumframe-inline', false, [], AUMFRAME_VERSION);
            wp_enqueue_style('aumframe-inline');
            wp_add_inline_style('aumframe-inline', Str::cssForStyleElement($css));
        }

        /*
         * The motion runtime. Motion ships with the plugin (assets/motion.js) and the CDN is only a
         * fallback.
         *
         * ?ver is passed by the entry point down to its submodules (runtime.js, behaviors, toggle) —
         * those are bare-URL ESM, and without it the browser keeps serving them from cache.
         *
         *  The version must be the newest mtime across the whole module graph, not the entry point
         * alone: the submodules change daily while the entry point hardly ever does, so watching only the
         * entry produces "I changed runtime.js and the page still behaves the old way" over and over —
         * with the file on the server genuinely being the new one, so no amount of looking will find it.
 */
        wp_enqueue_script(
            'aumframe-runtime',
            AUMFRAME_URL . 'assets/runtime-boot.js',
            [],
            aumframe_module_ver(['assets/runtime-boot.js', 'packages/runtime/src']),
            true
        );
        self::as_module('aumframe-runtime');

        $ver = aumframe_module_ver(['assets/runtime-boot.js', 'packages/runtime/src']);
        $html = '';
        foreach ([Router::match(), Router::shell()] as $src) {
            if ($src) {
                $html .= (string) $src['baked_html'];
            }
        }
        $modules = ['packages/runtime/src/runtime.js', 'packages/runtime/src/behaviors.js', 'packages/runtime/src/tokens.js', 'packages/runtime/src/toggle.js', 'assets/motion.js'];
        // The attribute is HTML-escaped by the baker: data-af-behavior="{&quot;module&quot;:&quot;builtin/carousel&quot;…}"
        if (preg_match_all('/data-af-behavior="\{&quot;module&quot;:&quot;builtin\/([a-z0-9\-]+)&quot;/', $html, $m)) {
            foreach (array_unique($m[1]) as $name) {
                $modules[] = 'packages/runtime/src/behaviors/' . $name . '.js';
            }
        }
        add_action('wp_head', static function () use ($modules, $ver) {
            foreach ($modules as $rel) {
                printf('<link rel="modulepreload" href="%s">' . "\n", esc_url(add_query_arg('ver', $ver, AUMFRAME_URL . $rel)));
            }
        }, 3);
    }
}