<?php

function gtm_render_block_icon( $attr, $content, $block ) {
	$icon = 'gtm-basic-icon-ice-cream';
	if ( ! empty( $attr['icon'] ) ) {
		$icon = $attr['icon'];
	}
	
	$wrapper_attributes = get_block_wrapper_attributes( ['class' => implode( ' ', ['gtm-icon', $icon] )] );

	return sprintf(
		'<i %1$s></i>',
		$wrapper_attributes
	);
}

/**
 * Registers the `gtm/icon` block on the server.
 */
function gtm_register_block_icon() {
	gtm_register_block_type( 'icon', [
		'render_callback' => 'gtm_render_block_icon',
	] );
}

add_action( 'init', 'gtm_register_block_icon', 20 );

add_filter( 'gtm.BlockStyleCompiler.gtm/icon', 'gtm_compile_block_css_icon', 10, 3 );
function gtm_compile_block_css_icon( $output, $attributes, $blockName ) {
	$block_style = ['classes' => [], 'style' => []];

	$block_style['classes'][] = 'gtm-block';

	gtm_css_compileCssVar( $block_style, "icon-icon-size", $attributes['iconSize'] );

	/* Colors */

	gtm_css_compileCssVar( $block_style, "icon-color", gtm_css_parseColorValue( $attributes['color'] ) );
	gtm_css_compileCssVar( $block_style, "icon-bg", gtm_css_parseColorValue( $attributes['bg'] ) );
	gtm_css_compileCssVar( $block_style, "icon-hover-color", gtm_css_parseColorValue( $attributes['hoverColor'] ) );
	gtm_css_compileCssVar( $block_style, "icon-hover-bg", gtm_css_parseColorValue( $attributes['hoverBg'] ) );

	// Apply to output
	$block_style['style'] = ['{{BLOCK}}' => $block_style['style']];

	return [
		'classes' => array_merge( $output['classes'], $block_style['classes'] ),
		'style'   => array_replace_recursive( $output['style'], $block_style['style'] ),
	];
}