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

final class Display {
    public static function boot() {
        add_action( 'init', array( __CLASS__, 'register' ) );
        add_action( 'enqueue_block_editor_assets', array( __CLASS__, 'editor' ) );
    }
    public static function register() {
        wp_register_script( 'customfields-block', CUSTOMFIELDS_URL . 'assets/block.js', array( 'wp-blocks', 'wp-element', 'wp-components', 'wp-block-editor', 'wp-data', 'wp-i18n', 'wp-server-side-render' ), CUSTOMFIELDS_VERSION, true );
        wp_set_script_translations( 'customfields-block', 'customfields-com', CUSTOMFIELDS_PATH . 'languages' );
        register_block_type( 'customfields/value', array( 'api_version' => 3, 'title' => __( 'Custom field', 'customfields-com' ), 'category' => 'widgets', 'editor_script' => 'customfields-block', 'attributes' => array( 'name' => array( 'type' => 'string', 'default' => '' ), 'tag' => array( 'type' => 'string', 'default' => 'div' ) ), 'uses_context' => array( 'postId', 'postType' ), 'render_callback' => array( __CLASS__, 'render' ) ) );
        if ( function_exists( 'register_block_bindings_source' ) ) { register_block_bindings_source( 'customfields/value', array( 'label' => __( 'CustomFields.com', 'customfields-com' ), 'uses_context' => array( 'postId' ), 'get_value_callback' => array( __CLASS__, 'binding' ) ) ); }
    }
    public static function editor() {
        global $post; $fields = array();
        if ( $post && current_user_can( 'edit_post', $post->ID ) ) {
            foreach ( customfields_get_groups() as $group ) {
                if ( ! Editor::matches( $group, $post ) ) { continue; }
                foreach ( $group['fields'] as $field ) {
                    if ( in_array( $field['type'], array( 'repeater', 'group', 'flexible_content', 'clone' ), true ) ) { continue; }
                    $fields[] = array( 'label' => $group['title'] . ' / ' . $field['label'], 'value' => $field['name'] );
                }
            }
        }
        wp_localize_script( 'customfields-block', 'CustomFieldsBlock', array( 'fields' => $fields ) );
    }
    public static function accessible( $id ) {
        $post = get_post( $id );
        return $post && ! post_password_required( $post ) && ( is_post_publicly_viewable( $post ) || current_user_can( 'read_post', $id ) );
    }
    public static function definition( $name, $id ) {
        foreach ( customfields_get_groups() as $group ) {
            if ( ! Editor::matches( $group, get_post( $id ) ) ) { continue; }
            foreach ( $group['fields'] as $field ) { if ( $field['name'] === $name ) { return $field; } }
        }
        return null;
    }
    public static function binding( $args, $block, $attribute ) {
        $id = (int) ( $block->context['postId'] ?? get_the_ID() ); $name = $args['name'] ?? '';
        if ( ! is_string( $name ) || ! self::accessible( $id ) ) { return null; }
        $field = self::definition( $name, $id );
        if ( ! $field || ! in_array( $attribute, array( 'content', 'url', 'title', 'alt' ), true ) ) { return null; }
        $value = customfields_get( $name, $id );
        if ( 'image' === $field['type'] && 'url' === $attribute ) { return wp_get_attachment_image_url( (int) $value, 'large' ) ?: null; }
        if ( ! is_scalar( $value ) ) { return null; }
        return 'url' === $attribute ? esc_url( $value ) : esc_html( (string) $value );
    }
    public static function render( $attributes, $content = '', $block = null ) {
        $id = (int) ( $block->context['postId'] ?? get_the_ID() ); $name = $attributes['name'] ?? '';
        if ( ! is_string( $name ) || ! self::accessible( $id ) ) { return ''; }
        $field = self::definition( $name, $id ); if ( ! $field ) { return ''; }
        $value = customfields_get( $name, $id ); $html = '';
        if ( 'image' === $field['type'] ) { $html = wp_get_attachment_image( (int) $value, 'large' ); }
        elseif ( 'file' === $field['type'] ) { $url = wp_get_attachment_url( (int) $value ); if ( $url ) { $html = '<a href="' . esc_url( $url ) . '">' . esc_html( get_the_title( (int) $value ) ?: $field['label'] ) . '</a>'; } }
        elseif ( 'wysiwyg' === $field['type'] && is_string( $value ) ) { $html = wp_kses_post( $value ); }
        elseif ( 'gallery' === $field['type'] && is_array( $value ) ) { foreach ( $value as $attachment ) { $html .= wp_get_attachment_image( (int) $attachment, 'medium' ); } }
        elseif ( in_array( $field['type'], array( 'multiselect', 'checkboxes' ), true ) && is_array( $value ) ) {
            foreach ( $value as $choice ) { if ( ! is_scalar( $choice ) ) { return ''; } }
            $html = esc_html( implode( ', ', array_map( static function ( $choice ) use ( $field ) { return $field['choices'][ (string) $choice ] ?? (string) $choice; }, $value ) ) );
        }
        elseif ( is_scalar( $value ) ) { $html = esc_html( is_bool( $value ) ? ( $value ? '1' : '0' ) : (string) $value ); }
        if ( '' === $html ) { return ''; }
        $tag = in_array( $attributes['tag'] ?? '', array( 'div', 'p', 'span', 'h2', 'h3' ), true ) ? $attributes['tag'] : 'div';
        // Standalone previews, listings and builder widgets have no block-support context.
        // Only the actual value block may inherit its current WordPress wrapper attributes.
        $wrapper = $block instanceof \WP_Block && 'customfields/value' === $block->name
            && is_array( \WP_Block_Supports::$block_to_render )
            && \WP_Block_Supports::$block_to_render === $block->parsed_block
            ? get_block_wrapper_attributes() : '';
        return '<' . $tag . ' ' . $wrapper . '>' . $html . '</' . $tag . '>';
    }
}