<?php

const COMMENT_VARIATION_MKEY = 'variation-reviewed';

/*
 *  Add Product variation selection to existing product review form
 */
add_action( 'comment_form_logged_in_after', 'add_variation_select_field_on_comment_form' );
add_action( 'comment_form_after_fields', 'add_variation_select_field_on_comment_form' );

function add_variation_select_field_on_comment_form() { 
    
    // If is not a single product page, abort
    if( !is_product() ) { return; }
    
    $product = wc_get_product();

    // Not a variable product
    if( !$product instanceof \WC_Product_Variable ) { return; }
    
    $variations = $product->get_available_variations(); 
    
    // If there are no variations, abort
    if( empty($variations) ) { return; }

    //foreach($variations as $variation) { dumpVar($variation); }

    $loadedVariation = ( isset( $_GET['varid'] ) ) ? (int) $_GET['varid'] : 0;
    
    // Build the select html for varations
    ?>
        <label for="<?php echo COMMENT_VARIATION_MKEY; ?>">Select which <?php echo $product->get_name(); ?> variation you would like to review:</label>
        <select id="<?php echo COMMENT_VARIATION_MKEY; ?>" name="<?php echo COMMENT_VARIATION_MKEY; ?>" required>
            <option value="">Please Select A Variation</option>
            <option value="<?php echo $product->get_id(); ?>">All <?php echo $product->get_name(); ?> Variations</option>
            <?php foreach($variations as $variation):
                
                if( !$variation['variation_is_visible'] || !$variation['variation_is_active'] ) { continue; }
                $variationID = (int) $variation["variation_id"];
                $imgsrc = $variation['image']['thumb_src'];
                $name = '';
                foreach($variation['attributes'] as $k => $v) { $name .= $v . ' '; } 
                $name = rtrim($name);
                
                // Is this option the loaded variation
                $selected = ( (int) $variationID === $loadedVariation ) ? 'selected' : '';                
                ?>
                <option value="<?php echo $variationID; ?>" <?php echo $selected; ?>><?php echo $name; ?></option>
            <?php endforeach; ?>
        </select>
        <script>
            jQuery(document).ready(function() {  
                jQuery('#submit').on('click', function(event) {
                   
                    let variationSelect = document.getElementById("<?php echo COMMENT_VARIATION_MKEY; ?>");
                    let variationCurrentVal = parseInt( variationSelect.options[ variationSelect.selectedIndex ].value) ;

                    // Force user to select a variation
                    if( Number.isNaN(variationCurrentVal) || variationCurrentVal <= 0 ) {
                        event.preventDefault();                     
                        alert("Please select a variation of this product to review.");
                        return false;
                    }
                });
               
                jQuery(window).load(function() {
                    const lookingForParam = "goto";
                    const urlParams = new URLSearchParams(window.location.search);
                    const gotoAction = urlParams.get(lookingForParam);
                    const jumpToID = "<?php echo Dazamate\DazWCProductReview\Settings::getReviewFormID(); ?>";    
                    
                    if( gotoAction == 'revform' ) {
                        const revForm = document.getElementById(jumpToID);
                        
                        jQuery([document.documentElement, document.body]).animate({
                            scrollTop: jQuery("#" + jumpToID).offset().top - 100
                        }, 1000);                        
                    }                     
                });
            });
        </script>
    <?php 
}


/*
 *  Update comment and user meta after successful product review
 */
add_action( 'comment_post', function( $comment_ID, $comment_approved ) {
    
    $wpComment = get_comment($comment_ID);

    if( isset($_POST[COMMENT_VARIATION_MKEY]) && $_POST[COMMENT_VARIATION_MKEY] > 0 ) {
        
        // Update user meta
        $userapi = new Dazamate\DazWCProductReview\UserAPI( $wpComment->user_id );
        $userapi->setProductReviewed( $_POST[ COMMENT_VARIATION_MKEY ] );
        
        // Update comment meta
        update_comment_meta( $comment_ID, COMMENT_VARIATION_MKEY, $_POST[ COMMENT_VARIATION_MKEY ] );

        // Check if we can send email to admin about product
        if( DPRR_DEBUG_WRITE_EMAILS_TO_FILES ) { return; }

        // User selected not to have emails sent
        if( !Dazamate\DazWCProductReview\Settings::sendAdminEmailOnReviewSubmit() ) {
            return;
        }

        // Check if we have a WC_Product obj available
        $wcProduct = wc_get_product($_POST[COMMENT_VARIATION_MKEY]);
        if( !is_object($wcProduct) ) { return; }

        // Mail admin about new comment
        $admin_email = get_option('admin_email');

        $html = sprintf('<p>%s has left a new product review about %s<p><br><br><p>%s</p>', 
            $wpComment->comment_author, 
            $wcProduct->get_name(), 
            $wpComment->comment_content 
        );

        $html .= '<br>';
        $html .= sprintf('<p>Product Page Link: <a href="%s">%s</a><p>',
            $wcProduct->get_permalink(), 
            $wcProduct->get_name()
        );

        $headers = array('Content-Type: text/html; charset=UTF-8');
        wp_mail($admin_email, $wpComment->comment_author . ' has submitted a product review!', $html, $headers);
    }  

}, 10, 2 );



/*
 *  Add "product reviewed" data to the comment
 */
add_filter( 'comment_text', function( string $comment_text, $comment, $args ) {
    
    // Comment not approved or not a single product page
    if( $comment->comment_approved != 1 ) { return $comment_text; }

    // Get variation id
    $variationReviewed = get_comment_meta( $comment->comment_ID, COMMENT_VARIATION_MKEY, true );

    // No meta data stored to work with
    if( $variationReviewed === false || $variationReviewed <= 0 ) { return $comment_text; }

    // Get product 
    $wcProduct = wc_get_product($variationReviewed);

    // Check if product object is valid
    if( !$wcProduct instanceof \WC_Product ) { return $comment_text; }

    // Get product thumbnail img
    $product_thumb = $wcProduct->get_image([64,64]);    

    // Create author name
    $author = '<b>' . apply_filters( 'comment_author', $comment->comment_author, $comment->comment_ID ) . '</b>';

    // Is variation
    if( $wcProduct->get_parent_id() > 0 )  { 
        $author .= ' reviewed the ' . $wcProduct->get_name();
    }

    // Is parent of variations
    else if( $wcProduct->has_child() > 0 ) {
        $author .= ' reviewed all ' . rtrim($wcProduct->get_name(), 's') . 's';
    }

    // assume single product
    else {
        $author .= ' reviewed ' . $wcProduct->get_name();
    }

    if( is_product_category() ) {
         // Category name
        $catName = get_queried_object()->name;
        $author .= sprintf(' in <em>%s</em>', $catName);        
    }

    if( is_product() ) {
        // Produxct name
        $author .= sprintf(' in <em>%s</em>', $wcProduct->get_title() );   
    }

    // Build html
    ob_start(); ?>
    <div class="product-variation-reviwed">
        <div class="pvr-img">
            <?php echo $product_thumb; ?>
        </div>

        <div class="pvr-desc">
            <p><?php echo $author; ?></p>
        </div>
    </div>
    <?php 
    
    $prepend = ob_get_clean();

    // Prepend the comment meta info to the comment html
    $comment_text = $prepend . $comment_text;

    return $comment_text;
}, 10, 3);



/*
 *  Auto approve comments from registered customers
 */
add_filter( 'pre_comment_approved', function($approved, $commentdata) {
    
    // Already approved, skip logic
    if( $approved === 1 ) { return $approved; }

    // Skip if user opted out of auto approve feature
    if( !Dazamate\DazWCProductReview\Settings::autoApproveCustomerReviews() ) { return $approved; }

    // Make sure we have a user id (set to 0 if no user) and we are reviewing a product
    if( $commentdata['user_ID'] > 0 && $commentdata['comment_type'] === 'review' ) { return 1; }

    return $approved;
}, '99', 2 );




/*
 *  --- ADMIN AREA HOOKS ---
 */

/*
 *  Editing comment meta in the admin section
 */
add_action( 'edit_comment', function($comment_id) { 
   
    if( !wp_verify_nonce( $_POST['dprr-variation-id-updated'], 'dprr-variation-id-updated' ) ) { return; }
    if( isset( $_POST[ COMMENT_VARIATION_MKEY ] ) && $_POST[ COMMENT_VARIATION_MKEY] > 0 ) {        
        
        // Update comment meta
        update_comment_meta( $comment_id, COMMENT_VARIATION_MKEY, $_POST[ COMMENT_VARIATION_MKEY ]);
    }    
});


/*
 *  Add an edit option to comment editing screen 
 */
add_action( 'add_meta_boxes_comment', function() { 
    add_meta_box( 'dprr-meta-box', 'Product Variation Reviewed', 'product_reviewed_comment_edit_meta_box', 'comment', 'normal', 'high' );
});


/*
 *  Add the html and form fields inside the meta box 
 */
function product_reviewed_comment_edit_meta_box( $comment ) {
    $productVariationID = get_comment_meta( $comment->comment_ID, COMMENT_VARIATION_MKEY, true );    
    wp_nonce_field( 'dprr-variation-id-updated', 'dprr-variation-id-updated', false ); ?>
    <p>
        <label for="add_comment_met">Product Variation Reviwed</label>
        <input type="text" name="<?php echo COMMENT_VARIATION_MKEY; ?>" value="<?php echo esc_attr( $productVariationID ); ?>" class="widefat" />
    </p>
    <?php
}