<?php
defined('ABSPATH') || exit;

/**
 * Admin pages — conversion UI and settings.
 */
class HTEL_Admin {

    /**
     * Register admin menu pages.
     */
    public static function register_menu() {
        // Top-level menu
        add_menu_page(
            __('AI to Elementor', 'aitoel-html-importer'),
            __('AI to Elementor', 'aitoel-html-importer'),
            'edit_posts',
            'htel-convert',
            array(__CLASS__, 'render_convert_page'),
            'data:image/svg+xml;base64,' . base64_encode('<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor"><path d="M10 2L3 7v6l7 5 7-5V7l-7-5zm0 2.18L14.5 7.5 10 10.82 5.5 7.5 10 4.18zM5 8.82l4 2.86v3.5L5 12.32v-3.5zm10 0v3.5l-4 2.86v-3.5l4-2.86z"/></svg>'),
            58 // Position: after Appearance (60) but before typical plugins
        );

        // Convert submenu (replaces the auto-generated duplicate)
        add_submenu_page(
            'htel-convert',
            __('Convert', 'aitoel-html-importer'),
            __('Convert', 'aitoel-html-importer'),
            'edit_posts',
            'htel-convert',
            array(__CLASS__, 'render_convert_page')
        );

        // Settings submenu
        add_submenu_page(
            'htel-convert',
            __('Settings', 'aitoel-html-importer'),
            __('Settings', 'aitoel-html-importer'),
            'manage_options',
            'htel-settings',
            array(__CLASS__, 'render_settings_page')
        );
    }

    /**
     * Register settings.
     */
    public static function register_settings() {
        register_setting('htel_settings', 'htel_api_url', array(
            'type'              => 'string',
            'sanitize_callback' => array(__CLASS__, 'sanitize_api_url'),
            'default'           => HTEL_API_URL,
        ));
        register_setting('htel_settings', 'htel_telemetry_opt_in', array(
            'type'              => 'boolean',
            'sanitize_callback' => 'rest_sanitize_boolean',
            'default'           => false,
        ));
        // Conversion Quality Sampling — opt-OUT (see ToS §9.4).
        // Default false means sampling is ON; user checks to disable.
        register_setting('htel_settings', 'htel_sampling_opt_out', array(
            'type'              => 'boolean',
            'sanitize_callback' => 'rest_sanitize_boolean',
            'default'           => false,
        ));
        // Global Colors mapping is deliberately NOT registered here. The feature is built
        // end-to-end (API `globalize` + inject_global_colors() below in class-converter) but
        // held back from release — George's call, 2026-08-07 ("option B"). Reinstating it is
        // the register_setting + the Settings checkbox + the option-read in convert(); the
        // response-side injection path below is kept and inert without them.
    }

    /**
     * Sanitize callback for the htel_api_url setting.
     *
     * Refuses to persist an empty or malformed value — falls back to the
     * existing stored value (if it was valid) or to HTEL_API_URL constant.
     *
     * Why this is necessary on top of get_api_url() self-healing:
     *   - get_api_url() is the READ path. Self-healing there means an
     *     accidentally-saved-empty option silently disappears on next read.
     *     That's defense-in-depth, but the customer's UI experience is
     *     "I saved something, then it vanished" — confusing.
     *   - This sanitize callback is the WRITE path. We refuse the bad
     *     value at submit time and surface an admin notice explaining why.
     *     The customer sees: "the API URL field can't be empty; reverted
     *     to https://api.aitoelementor.com" — much clearer.
     *
     * Tests in wp-plugin/tests/test-settings-sanitize.php enforce this.
     */
    public static function sanitize_api_url($value) {
        // Trim whitespace; many "empty" submissions are actually whitespace
        $value = is_string($value) ? trim($value) : '';

        // Valid URL with http(s) scheme — accept (esc_url_raw for safety)
        if ($value !== ''
            && preg_match('#^https?://[^\s/]+#i', $value)
            && filter_var($value, FILTER_VALIDATE_URL)) {
            $clean = esc_url_raw($value);
            return rtrim($clean, '/');
        }

        // Surface an admin notice so the user knows their submission was
        // refused (rather than silently saved-and-then-defaulted).
        add_settings_error(
            'htel_api_url',
            'htel_api_url_invalid',
            sprintf(
                /* translators: %s is the canonical API URL */
                esc_html__('The API URL must be a complete URL with http:// or https://. Reverted to %s.', 'aitoel-html-importer'),
                esc_html(HTEL_API_URL)
            ),
            'error'
        );

        // Fall back to existing valid stored value, otherwise the constant
        $existing = get_option('htel_api_url', '');
        if (is_string($existing) && $existing !== ''
            && preg_match('#^https?://[^\s/]+#i', $existing)
            && filter_var($existing, FILTER_VALIDATE_URL)) {
            return rtrim($existing, '/');
        }
        return HTEL_API_URL;
    }

    /**
     * Enqueue admin CSS and JS on our pages only.
     */
    public static function enqueue_assets($hook) {
        // Match our pages regardless of how WP sanitizes the menu title
        if (strpos($hook, 'htel-convert') === false && strpos($hook, 'htel-settings') === false) {
            return;
        }

        wp_enqueue_style(
            'htel-admin',
            HTEL_PLUGIN_URL . 'assets/css/admin.css',
            array(),
            HTEL_VERSION
        );

        wp_enqueue_script(
            'htel-admin',
            HTEL_PLUGIN_URL . 'assets/js/admin.js',
            array('jquery'),
            HTEL_VERSION,
            true
        );

        $license_status = HTEL_License::get_status();
        $has_license = ($license_status === 'active' && !empty(HTEL_License::get_key()));

        wp_localize_script('htel-admin', 'htel_ajax', array(
            'ajax_url'       => admin_url('admin-ajax.php'),
            'convert_nonce'  => wp_create_nonce('htel_convert_nonce'),
            'license_nonce'  => wp_create_nonce('htel_license_nonce'),
            'has_license'    => $has_license ? '1' : '0',
        ));
    }

    /**
     * Render the conversion page.
     */
    public static function render_convert_page() {
        include HTEL_PLUGIN_DIR . 'templates/admin-page.php';
    }

    /**
     * Render the settings page.
     */
    public static function render_settings_page() {
        include HTEL_PLUGIN_DIR . 'templates/settings-page.php';
    }
}