<?php
/**
 * AEO Bob Lite - Sidebar Meta Box
 * Matches Pro's workflow: Analyze → Shows Scores → Optimize button → Scrolls to optimization panel
 *
 * @package AEO_Bob_Lite
 */

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

class AEO_Bob_Lite_Meta_Box {

    private static $instance = null;

    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    private function __construct() {
        $this->init_hooks();
    }

    private function init_hooks() {
        add_action('add_meta_boxes', array($this, 'add_meta_box'));
        add_action('admin_enqueue_scripts', array($this, 'enqueue_meta_box_assets'));
    }

    /**
     * Enqueue meta box styles and scripts ONLY on post edit screens
     * WordPress.org compliance: Use proper enqueue APIs instead of inline tags
     */
    public function enqueue_meta_box_assets($hook_suffix) {
        // Only load on post edit screens where our meta box appears
        if (!in_array($hook_suffix, array('post.php', 'post-new.php'))) {
            return;
        }

        $screen = get_current_screen();
        if (!$screen || !in_array($screen->post_type, array('post', 'page'))) {
            return;
        }

        // Get post ID
        global $post;
        if (!$post) {
            return;
        }

        // Enqueue meta box script
        wp_enqueue_script(
            'aeo-bob-lite-meta-box',
            AEO_BOB_LITE_URL . 'assets/js/meta-box.js',
            array( 'jquery' ),
            AEO_BOB_LITE_VERSION,
            true
        );

        // Localize script with translatable strings
        wp_localize_script(
            'aeo-bob-lite-meta-box',
            'aeoBobLiteMetaBox',
            array(
                'ajaxUrl' => admin_url( 'admin-ajax.php' ),
                'postId' => absint( $post->ID ),
                'nonce'  => wp_create_nonce( 'aeo_bob_lite_nonce' ),
                'i18n'   => array(
                    'analyze'            => __( 'ANALYZE', 'aeo-bob-lite' ),
                    'analyzing'          => __( 'Analyzing...', 'aeo-bob-lite' ),
                    'optimize'           => __( 'OPTIMIZE', 'aeo-bob-lite' ),
                    'optimizeContent'    => __( 'OPTIMIZE CONTENT', 'aeo-bob-lite' ),
                    'reanalyze'          => __( 'RE-ANALYZE', 'aeo-bob-lite' ),
                    'rescoreContent'     => __( 'RE-SCORE CONTENT', 'aeo-bob-lite' ),
                    'analysisFailed'     => __( 'Analysis failed', 'aeo-bob-lite' ),
                    'rescoreFailed'      => __( 'Re-score failed', 'aeo-bob-lite' ),
                    'networkError'       => __( 'Network error. Please try again.', 'aeo-bob-lite' ),
                    'networkErrorRescore' => __( 'Network error during re-score. Please try again.', 'aeo-bob-lite' ),
                    'unknownError'       => __( 'Unknown error', 'aeo-bob-lite' ),
                    'invalidScores'      => __( 'Analysis returned invalid scores. Please try again.', 'aeo-bob-lite' ),
                    'addContent'         => __( 'Please add some content before analyzing.', 'aeo-bob-lite' ),
                    'scrollingToPanel'   => __( 'Scrolling to Optimization Panel', 'aeo-bob-lite' ),
                    'pointsTotal'        => __( 'points total', 'aeo-bob-lite' ),
                    'points'             => __( 'points', 'aeo-bob-lite' ),
                    'noChange'           => __( 'No change', 'aeo-bob-lite' ),
                ),
            )
        );
    }

    public function add_meta_box() {
        // Force the meta boxes to always be visible (prevent users from accidentally closing them)
        add_filter('postbox_classes_post_aeo-bob-lite-score', array($this, 'force_meta_box_open'));
        add_filter('postbox_classes_page_aeo-bob-lite-score', array($this, 'force_meta_box_open'));
        add_filter('postbox_classes_post_aeo-bob-lite-optimizer', array($this, 'force_meta_box_open'));
        add_filter('postbox_classes_page_aeo-bob-lite-optimizer', array($this, 'force_meta_box_open'));

        // Sidebar meta box with scores
        add_meta_box(
            'aeo-bob-lite-score',
            __('🤖 AEO BOB Score', 'aeo-bob-lite'),
            array($this, 'render_meta_box'),
            array('post', 'page'),
            'side',
            'default'  // Changed from 'high' to 'default' - don't compete with Publish box
        );

        // Optimization panel meta box (below editor) - Works in both Classic and Block Editor
        add_meta_box(
            'aeo-bob-lite-optimizer',
            __('🤖 AEO Bob LITE - Content Optimization', 'aeo-bob-lite'),
            array($this, 'render_optimization_panel'),
            array('post', 'page'),
            'normal',  // Position below editor
            'default'
        );

        // Reset hidden meta boxes for this user to ensure optimizer is visible
        $this->ensure_metabox_visible();
    }

    /**
     * Ensure the optimizer meta box is not hidden in user preferences
     */
    private function ensure_metabox_visible() {
        $user_id = get_current_user_id();
        if (!$user_id) {
            return;
        }

        $our_boxes = array('aeo-bob-lite-optimizer', 'aeo-bob-lite-score');

        // Check both post and page screens
        foreach (array('post', 'page') as $post_type) {
            // Check hidden meta boxes (Screen Options unchecked)
            $hidden_boxes = get_user_meta($user_id, 'metaboxhidden_' . $post_type, true);
            if (is_array($hidden_boxes)) {
                $updated = false;
                foreach ($our_boxes as $box_id) {
                    if (($key = array_search($box_id, $hidden_boxes)) !== false) {
                        unset($hidden_boxes[$key]);
                        $updated = true;
                    }
                }
                if ($updated) {
                    update_user_meta($user_id, 'metaboxhidden_' . $post_type, array_values($hidden_boxes));
                }
            }

            // Check closed meta boxes (collapsed)
            $closed_boxes = get_user_meta($user_id, 'closedpostboxes_' . $post_type, true);
            if (is_array($closed_boxes)) {
                $updated = false;
                foreach ($our_boxes as $box_id) {
                    if (($key = array_search($box_id, $closed_boxes)) !== false) {
                        unset($closed_boxes[$key]);
                        $updated = true;
                    }
                }
                if ($updated) {
                    update_user_meta($user_id, 'closedpostboxes_' . $post_type, array_values($closed_boxes));
                }
            }
        }
    }

    /**
     * Force meta box to always be open (cannot be closed)
     */
    public function force_meta_box_open($classes) {
        // Remove 'closed' class if it exists
        $classes = array_diff($classes, array('closed'));
        return $classes;
    }

    public function render_meta_box($post) {
        // Get stored data
        $seo_score_raw = get_post_meta($post->ID, '_aeo_bob_seo_score', true);
        $aeo_score_raw = get_post_meta($post->ID, '_aeo_bob_aeo_score', true);
        $last_analysis = get_post_meta($post->ID, '_aeo_bob_last_analyzed', true);

        // Use actual scores or null
        $seo_score = ($seo_score_raw !== '' && $seo_score_raw !== false) ? (int)$seo_score_raw : null;
        $aeo_score = ($aeo_score_raw !== '' && $aeo_score_raw !== false) ? (int)$aeo_score_raw : null;

        // Check if ANY scores exist
        $has_any_scores = ($seo_score !== null || $aeo_score !== null);

        // Show OPTIMIZE button ONLY if BOTH scores exist AND at least one is > 0
        $show_optimize = false;
        if ($seo_score !== null && $aeo_score !== null) {
            if ($seo_score > 0 || $aeo_score > 0) {
                $show_optimize = true;
            }
        }

        // ✅ v1.5.43: Don't use 0 as placeholder for missing scores
        // If scores don't exist, we'll hide the scores section or show a message
        $seo_score_display = $seo_score;
        $aeo_score_display = $aeo_score;

        // Check if API key is configured
        $api_key = get_option('aeo_bob_lite_openai_key', '');
        $connection_status = !empty($api_key);

        // WP.org Guideline 5: No usage tracking for feature gating.
        $logo_url = AEO_BOB_LITE_URL . 'assets/images/aeoboblogo.png';
        ?>
        <div class="aeo-bob-sidebar-score">
            <div class="aeo-bob-logo">
                <img src="<?php echo esc_url( $logo_url ); ?>" alt="<?php esc_attr_e( 'AEO BOB LITE', 'aeo-bob-lite' ); ?>" class="aeo-bob-logo-img">
            </div>

            <div class="aeo-bob-scores-sidebar">
                <!-- Always render score placeholders so JavaScript can update them -->
                <div class="aeo-bob-no-scores"<?php echo $has_any_scores ? ' style="display:none;"' : ''; ?>>
                    <?php esc_html_e( 'No scores yet.', 'aeo-bob-lite' ); ?><br>
                    <strong><?php esc_html_e( 'Click ANALYZE to get started', 'aeo-bob-lite' ); ?></strong>
                </div>
                <div class="aeo-bob-score-items"<?php echo ! $has_any_scores ? ' style="display:none;"' : ''; ?>>
                    <div class="aeo-bob-score-item">
                        <span class="aeo-bob-score-label"><?php esc_html_e( 'SEO Score:', 'aeo-bob-lite' ); ?></span>
                        <span class="aeo-bob-score-value" data-score-type="seo"><?php echo $seo_score !== null ? esc_html( $seo_score ) : '0'; ?>/100</span>
                    </div>
                    <div class="aeo-bob-score-item">
                        <span class="aeo-bob-score-label"><?php esc_html_e( 'AEO Score:', 'aeo-bob-lite' ); ?></span>
                        <span class="aeo-bob-score-value" data-score-type="aeo"><?php echo $aeo_score !== null ? esc_html( $aeo_score ) : '0'; ?>/100</span>
                    </div>
                </div>
            </div>

            <?php if ( ! $show_optimize ) : ?>
                <div class="aeo-bob-analyze-button">
                    <button type="button" id="aeo-bob-analyze-sidebar" class="button button-secondary button-large">
                        🔍 <?php esc_html_e( 'ANALYZE', 'aeo-bob-lite' ); ?>
                    </button>
                    <p class="aeo-bob-button-hint"><?php esc_html_e( 'Free local analysis', 'aeo-bob-lite' ); ?></p>
                </div>
            <?php else : ?>
                <div class="aeo-bob-optimize-button">
                    <button type="button" id="aeo-bob-optimize-sidebar" class="button button-primary button-large" <?php disabled( ! $connection_status ); ?>>
                        🚀 <?php esc_html_e( 'OPTIMIZE', 'aeo-bob-lite' ); ?>
                    </button>
                    <?php if ( ! $connection_status ) : ?>
                        <p class="aeo-bob-api-warning">
                            ⚠️ <a href="<?php echo esc_url( admin_url( 'admin.php?page=aeo-bob-lite&tab=settings' ) ); ?>"><?php esc_html_e( 'Add API key', 'aeo-bob-lite' ); ?></a> <?php esc_html_e( 'for AI optimization', 'aeo-bob-lite' ); ?>
                        </p>
                    <?php endif; ?>
                </div>

                <div class="aeo-bob-reanalyze-button">
                    <button type="button" id="aeo-bob-reanalyze-sidebar" class="button button-secondary button-large">
                        🔄 <?php esc_html_e( 'RE-ANALYZE', 'aeo-bob-lite' ); ?>
                    </button>
                    <p class="aeo-bob-button-hint"><?php esc_html_e( 'After manual edits', 'aeo-bob-lite' ); ?></p>
                </div>

                <div class="aeo-bob-score-improvement">
                    <h4 class="aeo-bob-improvement-title">📊 <?php esc_html_e( 'Score Change', 'aeo-bob-lite' ); ?></h4>
                    <div class="aeo-bob-improvement-scores">
                        <div class="aeo-bob-improvement-row">
                            <div class="aeo-bob-improvement-label"><?php esc_html_e( 'SEO Score', 'aeo-bob-lite' ); ?></div>
                            <div class="aeo-bob-improvement-value">
                                <span id="sidebar-old-seo">--</span> → <span id="sidebar-new-seo">--</span>
                            </div>
                            <div id="sidebar-seo-improvement" class="aeo-bob-improvement-delta"></div>
                        </div>
                        <div class="aeo-bob-improvement-row aeo-bob-improvement-row-aeo">
                            <div class="aeo-bob-improvement-label"><?php esc_html_e( 'AEO Score', 'aeo-bob-lite' ); ?></div>
                            <div class="aeo-bob-improvement-value aeo-bob-improvement-value-aeo">
                                <span id="sidebar-old-aeo">--</span> → <span id="sidebar-new-aeo">--</span>
                            </div>
                            <div id="sidebar-aeo-improvement" class="aeo-bob-improvement-delta"></div>
                        </div>
                    </div>
                </div>
            <?php endif; ?>

            <div class="aeo-bob-sidebar-upgrade-cta">
                <p class="aeo-bob-upgrade-text">⚡ <?php esc_html_e( 'Want more AI providers & bulk operations?', 'aeo-bob-lite' ); ?></p>
                <a href="<?php echo esc_url( admin_url( 'admin.php?page=aeo-bob-lite-upgrade' ) ); ?>" class="button aeo-bob-upgrade-btn">
                    <?php esc_html_e( 'Upgrade to Pro', 'aeo-bob-lite' ); ?>
                </a>
            </div>
        </div>
        <?php
    }

    /**
     * Render optimization panel below editor (works in both Classic and Block Editor)
     */
    public function render_optimization_panel($post) {
        // Include the optimization panel template (HTML only)
        // JavaScript is loaded via admin_footer hook in class-aeo-bob-lite-admin.php
        if (file_exists(AEO_BOB_LITE_PATH . 'admin/optimization-panel.php')) {
            include AEO_BOB_LITE_PATH . 'admin/optimization-panel.php';
        }
    }
}