<?php

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

/**
 * The plugin's admin: its menu, scripts and chat preview, and the tab
 * controllers, which serve their own AJAX endpoints (RSVL_Model_Admin,
 * RSVL_Training_Admin, RSVL_Visibility_Admin and RSVL_Chats_Admin). The
 * settings page itself is RSVL_Settings_Page; its form saves in place
 * through ajax_save_settings(), or through options.php without JavaScript
 * (see RSVL_Settings::register()).
 */
class RSVL_Admin
{
    /** The admin page's slug: admin.php?page=resolver. */
    public const PAGE = 'resolver';

    public function __construct()
    {
        add_action('admin_menu', [$this, 'add_menu_page']);
        add_filter('submenu_file', [$this, 'highlight_submenu']);
        add_action('admin_enqueue_scripts', [$this, 'admin_menu_css']);
        add_action('admin_enqueue_scripts', [$this, 'enqueue_assets']);
        add_action('admin_footer', [$this, 'render_chat_preview']);

        // Freemius edits
        add_action('admin_init', [$this, 'remove_freemius_pricing_menu']);
        resolver_fs()->add_filter('pricing_url', [$this, 'change_freemius_pricing_url'], 10);
        resolver_fs()->add_filter('show_deactivation_feedback_form', function () {
            return false;
        });

        // AJAX handlers. Nonce and capability checks are applied by
        // RSVL_Ajax::register() from the manifests — never inside the
        // handlers themselves.
        RSVL_Ajax::register(RSVL_Ajax::admin_routes([
            'resolver_save_settings'       => 'ajax_save_settings',
            'resolver_dismiss_onboarding'  => 'ajax_dismiss_onboarding',
            'resolver_chat_preview_status' => 'ajax_chat_preview_status',
            'resolver_claim_confetti'      => 'ajax_claim_confetti',
        ]), $this);

        RSVL_Model_Admin::register();
        RSVL_Training_Admin::register();
        RSVL_Visibility_Admin::register();
        RSVL_Chats_Admin::register();
        RSVL_Privacy_Admin::register();
    }

    /**
     * Add the admin menu page.
     */
    public function add_menu_page()
    {
        $slug     = self::PAGE;
        $callback = [$this, 'render_page'];

        add_menu_page(
            __('Resolver', 'resolver-ai-chatbot'),
            __('Resolver', 'resolver-ai-chatbot'),
            'manage_options',
            $slug,
            $callback,
            $this->get_menu_icon(),
            90
        );

        // The Dashboard is the page itself, so its menu link has no tab.
        foreach (self::tabs() as $tab => $label) {
            $menu_slug = 'dashboard' === $tab ? $slug : $slug . '&tab=' . $tab;
            add_submenu_page($slug, $label, $label, 'manage_options', $menu_slug, $callback);
        }

        if (! resolver_is_pro()) {
            global $submenu;
            $submenu[ $slug ][] = [
                __('Get Pro', 'resolver-ai-chatbot') . ' &rarr;',
                'manage_options',
                'https://resolverchatbot.com/pricing/',
            ];
        }

    }

    /**
     * Color the Get Pro menu link, on every admin screen, since the menu is
     * on all of them. Added to WordPress's own menu stylesheet, which they
     * all load.
     */
    public function admin_menu_css()
    {
        if (resolver_is_pro()) {
            return;
        }

        wp_add_inline_style('admin-menu', '#adminmenu a[href="https://resolverchatbot.com/pricing/"]{color:#f18500!important}');
    }

    public function highlight_submenu($submenu_file)
    {
        $screen = get_current_screen();
        if (! $screen || 'toplevel_page_' . self::PAGE !== $screen->id) {
            return $submenu_file;
        }

        $tab = isset($_GET['tab']) ? sanitize_text_field(wp_unslash($_GET['tab'])) : '';

        if ('' === $tab || 'dashboard' === $tab) {
            return self::PAGE;
        }

        return self::PAGE . '&tab=' . $tab;
    }

    // The menu link is removed in the SDK setup, but this makes it completely inaccessible
    public function remove_freemius_pricing_menu()
    {
        remove_submenu_page(self::PAGE, self::PAGE . '-pricing');
    }

    // Changes the URL for the "Upgrade" tab in the Account menu and the Upgrade link in the plugin settings
    public function change_freemius_pricing_url()
    {
        return 'https://resolverchatbot.com/pricing/';
    }

    /**
     * Enqueue admin assets.
     */
    public function enqueue_assets(string $hook)
    {
        if (! self::is_plugin_screen($hook)) {
            return;
        }

        add_filter('admin_footer_text', '__return_empty_string', 11);
        add_filter('update_footer', '__return_empty_string', 11);

        wp_enqueue_style(
            'rsvl-coloris',
            RSVL_PLUGIN_URL . 'admin/vendor/coloris/coloris.min.css',
            [],
            RSVL_VERSION
        );
        wp_enqueue_script(
            'rsvl-coloris',
            RSVL_PLUGIN_URL . 'admin/vendor/coloris/coloris.min.js',
            [],
            RSVL_VERSION,
            true
        );

        wp_enqueue_style(
            'rsvl-admin',
            RSVL_PLUGIN_URL . 'admin/css/admin.css',
            [],
            (string) filemtime(RSVL_PLUGIN_DIR . 'admin/css/admin.css')
        );

        $admin_deps = ['jquery', 'wp-i18n', 'rsvl-coloris', 'rsvl-markdown', 'rsvl-chat-widget'];

        // Mirror RSVL_Settings_Page::$active_tab's own default — the Dashboard's
        // menu links (top-level item and submenu item) omit the tab param
        // entirely, unlike the plugin's own in-page nav tab for Dashboard, which
        // sets tab=dashboard explicitly. Missing the param here (Chart.js never
        // loads) is why charts silently failed to render when landing on the
        // Dashboard from outside the plugin.
        $current_tab = isset($_GET['tab']) ? sanitize_text_field(wp_unslash($_GET['tab'])) : 'dashboard';

        // Registered on every screen so Pro can enqueue it for its own charts.
        wp_register_script('rsvl-chartjs', RSVL_PLUGIN_URL . 'admin/vendor/chartjs/chart.umd.js', [], '4.5.1', true);
        if (in_array($current_tab, ['dashboard', 'token-usage'], true)) {
            wp_enqueue_script('rsvl-chartjs');
            $admin_deps[] = 'rsvl-chartjs';
        }

        wp_enqueue_script(
            'rsvl-admin',
            RSVL_PLUGIN_URL . 'admin/js/admin.js',
            $admin_deps,
            (string) filemtime(RSVL_PLUGIN_DIR . 'admin/js/admin.js'),
            true
        );
        RSVL_Script_Strings::attach('rsvl-admin', 'admin');

        // Screens with scripts of their own, which build on admin.js.
        $screen_scripts = ['model' => 'admin-model', 'chats' => 'admin-chats'];
        if (isset($screen_scripts[ $current_tab ])) {
            $file = 'admin/js/' . $screen_scripts[ $current_tab ] . '.js';
            wp_enqueue_script(
                'rsvl-' . $screen_scripts[ $current_tab ],
                RSVL_PLUGIN_URL . $file,
                ['jquery', 'rsvl-admin'],
                (string) filemtime(RSVL_PLUGIN_DIR . $file),
                true
            );
        }

        // The token usage chart, on the dashboard and on Token Usage.
        if (in_array($current_tab, ['dashboard', 'token-usage'], true)) {
            wp_enqueue_script(
                'rsvl-admin-charts',
                RSVL_PLUGIN_URL . 'admin/js/admin-charts.js',
                ['jquery', 'rsvl-chartjs', 'rsvl-admin'],
                (string) filemtime(RSVL_PLUGIN_DIR . 'admin/js/admin-charts.js'),
                true
            );
            RSVL_Script_Strings::attach('rsvl-admin-charts', 'charts');
        }

        $provider_models = [];
        foreach (RSVL_Provider::get_all_providers() as $id => $p) {
            $provider_models[ $id ] = $p->get_available_models();
        }

        $connection_statuses = array_map(fn ($provider) => $provider->is_connected(), RSVL_Provider::get_all_providers());
        $embedding_provider  = resolver_get_setting('embedding_provider');

        wp_localize_script('rsvl-admin', 'rsvlAdmin', [
            'ajaxUrl'                => admin_url('admin-ajax.php'),
            'adminUrl'               => admin_url('admin.php'),
            'nonce'                  => wp_create_nonce('resolver_admin_nonce'),
            'providerModels'         => $provider_models,
            'connectionStatuses'     => $connection_statuses,
            'apiKeyUrl'              => admin_url('options-connectors.php'),
            'savedEmbeddingProvider' => $embedding_provider,
            // Switching training platforms waits for a training run to end.
            'trainingRunning' => RSVL_Indexing_Status::is_running(),
            // Training and retraining both re-embed, so every control that
            // starts one stays disabled until an embedding provider is connected.
            'embeddingConnected' => ! empty($connection_statuses[ $embedding_provider ]),
            // For numbers formatted in the browser, e.g. "de-DE".
            'locale' => str_replace('_', '-', determine_locale()),
            // Loaded only after a live reveal wins the site's one-time claim.
            'confettiUrl' => get_option('resolver_has_seen_confetti') ? '' : RSVL_PLUGIN_URL . 'admin/vendor/confetti/confetti.min.js?ver=2.2.0',
        ]);

        // Initialize the preview even when it starts hidden: training can
        // make it ready while this page remains open.
        RSVL_Widget_Renderer::enqueue_scripts(true);
        wp_localize_script('rsvl-chat-widget', 'rsvlChat', RSVL_Widget_Renderer::script_data(true));
    }

    /**
     * Render the chat widget in the admin footer on our settings page.
     */
    public function render_chat_preview()
    {
        $screen = get_current_screen();
        if (! $screen || ! self::is_plugin_screen($screen->id)) {
            return;
        }
        RSVL_Widget_Renderer::render_html(true);
    }

    /**
     * Render the main admin page.
     */
    public function render_page()
    {
        if (! current_user_can('manage_options')) {
            return;
        }

        (new RSVL_Settings_Page())->render();
    }

    /**
     * Save the settings form without leaving the page (admin.js), so what the
     * save changes shows at once: the chat preview, the checklist, the token
     * alert, and the open tab's own state.
     *
     * Saving through update_option() takes the same path as options.php:
     * RSVL_Settings::sanitize() as the option's sanitize callback, then the
     * update_option_resolver_settings listeners, including the retraining a
     * switch of training platform starts (RSVL_Indexer::handle_settings_update())
     * and the purge of pages made untrainable (RSVL_Training_Admin::maybe_purge_private_posts()).
     *
     * The response carries what the form can't know from its own fields:
     * values the sanitizer rewrote, and page state the save changed. Each
     * open tab gets its own entry, keyed by its _sections[] marker.
     */
    public function ajax_save_settings()
    {
        // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- sanitized by RSVL_Settings::sanitize(), the option's registered sanitize callback.
        $input    = isset($_POST['resolver_settings']) && is_array($_POST['resolver_settings']) ? wp_unslash($_POST['resolver_settings']) : [];
        $sections = isset($input['_sections']) && is_array($input['_sections']) ? array_map('sanitize_key', $input['_sections']) : [];

        $before          = RSVL_Settings::all();
        $trained_before  = RSVL_Index::get_post_ids();
        update_option(RSVL_Settings::OPTION, $input);
        $after = RSVL_Settings::all();

        $data = [
            // The checklist re-rendered for the saved settings; '' once dismissed.
            'onboarding'          => resolver_get_template('onboarding-checklist', array_merge((new RSVL_Settings_Page())->get_onboarding_data(), ['is_pro' => resolver_is_pro()])),
            // The header's token alert, which a new limit can show or clear.
            'token_usage_percent' => RSVL_Token_Budget::usage_percent(),
            'token_usage_url'     => self::tab_url('token-usage'),
        ];

        if (in_array('model', $sections, true)) {
            $data['model'] = (new RSVL_Model_Admin())->saved_response($before, $after);
            if ($data['model']['retraining']) {
                // Follow the retraining on the Training menu, which plays it
                // from the start (see admin.js).
                $data['redirect'] = self::tab_url('training', ['retraining' => '1']);
            }
        }

        if (in_array('appearance', $sections, true)) {
            // What the preview widget can't show live: see applyAppearanceSave() in admin.js.
            $data['appearance'] = array_merge(['position' => $after['position']], RSVL_Widget_Renderer::get_options());
        }

        if (in_array('training', $sections, true)) {
            $training         = new RSVL_Training_Admin();
            $data['training'] = [
                // Pages the save made untrainable, gone from the Pages table.
                'removed_post_ids' => array_values(array_diff($trained_before, RSVL_Index::get_post_ids())),
                'count_label'      => $training->get_pages_count_label(),
            ];
        }

        if (in_array('visibility', $sections, true)) {
            $visibility         = (new RSVL_Visibility_Admin())->get_tab_data(true);
            $data['visibility'] = [
                'display_mode'           => $after['display_mode'],
                // Same rule as templates/tab-visibility.php: a chatbot that
                // isn't displayed can't be turned on until it could show.
                'display_disabled'       => 'none' === $after['display_mode'] && (! $visibility['model_configured'] || ! $visibility['has_training_data']),
                'display_singular_types' => $after['display_singular_types'],
                'display_archives'       => $after['display_archives'],
                'display_special'        => $after['display_special'],
            ];
        }

        if (in_array('token_usage', $sections, true)) {
            $limit               = (int) $after['monthly_token_limit'];
            $data['token_usage'] = [
                'limit' => $limit,
                /* translators: %s: number of tokens. */
                'limit_label' => $limit > 0 ? sprintf(__('%s tokens/month', 'resolver-ai-chatbot'), number_format_i18n($limit)) : '',
            ];
        }

        wp_send_json_success($data);
    }

    public function ajax_dismiss_onboarding()
    {
        update_option('resolver_onboarding_dismissed', true, false);
        wp_send_json_success();
    }

    public function ajax_chat_preview_status()
    {
        wp_send_json_success(['ready' => RSVL_Widget_Renderer::is_preview_ready()]);
    }

    public function ajax_claim_confetti()
    {
        // add_option's unique option name lets only one tab/admin claim it.
        // Polling readiness and server-rendered visibility never consume it.
        $claimed = RSVL_Widget_Renderer::is_preview_ready()
            && add_option('resolver_has_seen_confetti', true, '', false);
        wp_send_json_success(['claimed' => $claimed]);
    }

    /**
     * The menu icon: public/img/plugin-icon.svg, base64-encoded. It's drawn
     * with filled shapes and clip paths only: WordPress repaints a menu icon
     * by setting every fill to the admin color scheme's color, which would
     * turn a mask's black and white into one color, and doesn't touch strokes.
     */
    private function get_menu_icon()
    {
        return 'data:image/svg+xml;base64,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';
    }

    /**
     * The settings page's tabs, slug => label, in menu order.
     */
    public static function tabs(): array
    {
        return [
            'dashboard'   => __('Dashboard', 'resolver-ai-chatbot'),
            'model'       => __('Model', 'resolver-ai-chatbot'),
            'training'    => __('Training', 'resolver-ai-chatbot'),
            'appearance'  => __('Appearance', 'resolver-ai-chatbot'),
            'visibility'  => __('Visibility', 'resolver-ai-chatbot'),
            'chats'       => __('Chats', 'resolver-ai-chatbot'),
            'analytics'   => __('Analytics', 'resolver-ai-chatbot'),
            'token-usage' => __('Token Usage', 'resolver-ai-chatbot'),
            'help'        => __('Help', 'resolver-ai-chatbot'),
        ];
    }

    /**
     * The URL of a settings page tab, and any more query arguments, such as
     * a panel.
     */
    public static function tab_url(string $tab, array $args = []): string
    {
        return add_query_arg(array_merge(['page' => self::PAGE, 'tab' => $tab], $args), admin_url('admin.php'));
    }

    /**
     * Whether an admin screen (its hook suffix or screen ID) is one of the
     * plugin's: the settings page, or a page Freemius adds under it, such as
     * resolver-account. Matched exactly, because "resolver" alone could be
     * part of another plugin's page.
     */
    public static function is_plugin_screen(string $id): bool
    {
        $freemius_pages = 'account|contact|pricing|affiliation|addons|wp-support-forum';

        return 1 === preg_match('/_page_' . preg_quote(self::PAGE, '/') . "(-({$freemius_pages}))?$/", $id);
    }
}