<?php
/**
 * Button Block.
 *
 * @since 8.5.0
 *
 * @package automattic/jetpack
 */

namespace Automattic\Jetpack\Extensions\Button;

use Automattic\Jetpack\Blocks;
use Jetpack_Gutenberg;

if ( ! defined( 'ABSPATH' ) ) {
	exit( 0 );
}

const FEATURE_NAME = 'button';
const BLOCK_NAME   = 'jetpack/' . FEATURE_NAME;

/**
 * Registers the block for use in Gutenberg
 * This is done via an action so that we can disable
 * registration if we need to.
 */
function register_block() {
	Blocks::jetpack_register_block(
		BLOCK_NAME,
		array(
			'render_callback'       => __NAMESPACE__ . '\render_block',
			'render_email_callback' => __NAMESPACE__ . '\render_email',
			'uses_context'          => array( 'jetpack/parentBlockWidth' ),
			'selectors'             => array(
				'border' => '.wp-block-jetpack-button .wp-block-button__link',
			),
		)
	);
}
add_action( 'init', __NAMESPACE__ . '\register_block' );

/**
 * Button block render callback.
 *
 * @param array  $attributes Array containing the Button block attributes.
 * @param string $content    The Button block content.
 *
 * @return string
 */
function render_block( $attributes, $content ) {
	$save_in_post_content = get_attribute( $attributes, 'saveInPostContent' );

	// The Jetpack Button block depends on the core button block styles.
	// The following ensures that those styles are enqueued when rendering this block.
	enqueue_existing_button_style_dependency( 'core/button' );
	enqueue_existing_button_style_dependency( 'core/buttons' );

	Jetpack_Gutenberg::load_styles_as_required( FEATURE_NAME );

	if ( $save_in_post_content || ! class_exists( 'DOMDocument' ) ) {
		return $content;
	}

	$element   = get_attribute( $attributes, 'element' );
	$text      = wp_kses_post( get_attribute( $attributes, 'text' ) );
	$unique_id = get_attribute( $attributes, 'uniqueId' );
	$url       = get_attribute( $attributes, 'url' );
	$classes   = Blocks::classes( FEATURE_NAME, $attributes, array( 'wp-block-button' ) );

	$button_classes = get_button_classes( $attributes );
	$button_styles  = get_button_styles( $attributes );
	$wrapper_styles = get_button_wrapper_styles( $attributes );

	$wrapper_attributes = sprintf( ' class="%s" style="%s"', esc_attr( $classes ), esc_attr( $wrapper_styles ) );
	$button_attributes  = sprintf( ' class="%s" style="%s"', esc_attr( $button_classes ), esc_attr( $button_styles ) );

	if ( empty( $unique_id ) ) {
		$button_attributes .= ' data-id-attr="placeholder"';
	} else {
		$button_attributes .= sprintf( ' data-id-attr="%1$s" id="%1$s"', esc_attr( $unique_id ) );
	}

	if ( ! in_array( $element, array( 'a', 'button', 'input' ), true ) ) {
		$element = 'a';
	}

	if ( 'a' === $element ) {
		$button_attributes .= sprintf( ' href="%s" target="_blank" role="button" rel="noopener noreferrer"', esc_url( $url ) );
	} elseif ( 'button' === $element ) {
		$button_attributes .= ' type="submit"';
	} elseif ( 'input' === $element ) {
		$button_attributes .= sprintf( ' type="submit" value="%s"', esc_attr( wp_strip_all_tags( $text, true ) ) );
	}

	$button_attributes .= ' data-wp-class--is-submitting="state.isSubmitting" data-wp-bind--aria-disabled="state.isAriaDisabled"';

	$svg                  = '<svg width="24" height="24" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M12,1A11,11,0,1,0,23,12,11,11,0,0,0,12,1Zm0,19a8,8,0,1,1,8-8A8,8,0,0,1,12,20Z" opacity=".25"/><path d="M10.14,1.16a11,11,0,0,0-9,8.92A1.59,1.59,0,0,0,2.46,12,1.52,1.52,0,0,0,4.11,10.7a8,8,0,0,1,6.66-6.61A1.42,1.42,0,0,0,12,2.69h0A1.57,1.57,0,0,0,10.14,1.16Z"><animateTransform attributeName="transform" type="rotate" dur="0.75s" values="0 12 12;360 12 12" repeatCount="indefinite"/></path></svg>';
	$form_submitting_text = '<span class="is-visually-hidden">' . __( 'Submitting form', 'jetpack' ) . '</span>';
	$spinner              = '<span class="spinner" aria-hidden="true">' . $svg . $form_submitting_text . '</span>';

	$button = 'input' === $element
		? '<' . $element . $button_attributes . ' />'
		: '<' . $element . $button_attributes . '>' . $text . $spinner . '</' . $element . '>';

	// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
	return '<div' . $wrapper_attributes . '>' . $button . '</div>';
}

/**
 * WooCommerce Email Editor render callback for the button block.
 *
 * @param string $block_content The block content.
 * @param array  $parsed_block  The parsed block data.
 * @param object $rendering_context The email rendering context.
 *
 * @return string
 */
function render_email( $block_content, array $parsed_block, $rendering_context ) {
	// Validate input parameters and required dependencies
	if ( ! isset( $parsed_block['attrs'] ) || ! is_array( $parsed_block['attrs'] ) ||
		! class_exists( '\Automattic\WooCommerce\EmailEditor\Integrations\Core\Renderer\Blocks\Button' ) ) {
		return '';
	}

	$attributes = $parsed_block['attrs'];

	// Create a mock innerHTML that WooCommerce's button renderer can parse
	$button_text = ! empty( $attributes['text'] ) ? sanitize_text_field( $attributes['text'] ) : __( 'Click here', 'jetpack' );
	$button_url  = ! empty( $attributes['url'] ) ? $attributes['url'] : '#';

	// Create the innerHTML that WooCommerce's button renderer expects
	$inner_html = sprintf(
		'<div class="wp-block-button"><a class="wp-block-button__link" href="%s">%s</a></div>',
		esc_url( $button_url ),
		esc_html( $button_text )
	);

	// Format attributes for WooCommerce's Styles_Helper
	$formatted_attributes = format_attributes_for_woocommerce( $attributes );

	// Create a mock parsed block that WooCommerce's button renderer can handle
	$mock_parsed_block = array(
		'innerHTML' => $inner_html,
		'attrs'     => $formatted_attributes,
	);

	// Use WooCommerce's core button renderer
	$woo_button_renderer = new \Automattic\WooCommerce\EmailEditor\Integrations\Core\Renderer\Blocks\Button();

	return $woo_button_renderer->render( $block_content, $mock_parsed_block, $rendering_context );
}

/**
 * Format button attributes for WooCommerce's Styles_Helper.
 *
 * @param array $attributes The original attributes.
 * @return array The formatted attributes.
 */
function format_attributes_for_woocommerce( $attributes ) {
	$formatted = array();

	// Handle background colors (prioritize subscription attributes)
	// Named colors go in backgroundColor, hex colors go in style.color.background
	if ( ! empty( $attributes['buttonBackgroundColor'] ) ) {
		$formatted['backgroundColor'] = $attributes['buttonBackgroundColor'];
	} elseif ( ! empty( $attributes['backgroundColor'] ) ) {
		$formatted['backgroundColor'] = $attributes['backgroundColor'];
	}

	if ( ! empty( $attributes['customButtonBackgroundColor'] ) ) {
		$formatted['style']['color']['background'] = $attributes['customButtonBackgroundColor'];
	} elseif ( ! empty( $attributes['customBackgroundColor'] ) ) {
		$formatted['style']['color']['background'] = $attributes['customBackgroundColor'];
	}

	// Named colors go in textColor, hex colors go in style.color.text
	if ( ! empty( $attributes['textColor'] ) ) {
		$formatted['textColor'] = $attributes['textColor'];
	}
	if ( ! empty( $attributes['customTextColor'] ) ) {
		$formatted['style']['color']['text'] = $attributes['customTextColor'];
	}

	// Handle typography (font size)
	if ( ! empty( $attributes['fontSize'] ) ) {
		$formatted['style']['typography']['fontSize'] = $attributes['fontSize'];
	}
	if ( ! empty( $attributes['customFontSize'] ) ) {
		$formatted['style']['typography']['fontSize'] = $attributes['customFontSize'];
	}

	// Handle borders
	if ( ! empty( $attributes['borderRadius'] ) ) {
		$formatted['style']['border']['radius'] = $attributes['borderRadius'] . 'px';
	}
	// Named colors go in borderColor, hex colors go in style.color.border
	if ( ! empty( $attributes['borderColor'] ) ) {
		$formatted['borderColor'] = $attributes['borderColor'];
	}
	if ( ! empty( $attributes['customBorderColor'] ) ) {
		$formatted['style']['border']['color'] = $attributes['customBorderColor'];
	}
	// Handle border weight (subscription block uses borderWeight, button block expects style.border.width)
	if ( ! empty( $attributes['borderWeight'] ) ) {
		$formatted['style']['border']['width'] = $attributes['borderWeight'] . 'px';
	}

	// Handle padding
	if ( ! empty( $attributes['padding'] ) ) {
		$formatted['style']['spacing']['padding'] = $attributes['padding'] . 'px';
	}

	return $formatted;
}

/**
 * Get the Button block classes.
 *
 * @param array $attributes Array containing the block attributes.
 *
 * @return string
 */
function get_button_classes( $attributes ) {
	$classes                     = array( 'wp-block-button__link' );
	$has_class_name              = array_key_exists( 'className', $attributes );
	$has_named_text_color        = array_key_exists( 'textColor', $attributes );
	$has_custom_text_color       = array_key_exists( 'customTextColor', $attributes );
	$has_named_background_color  = array_key_exists( 'backgroundColor', $attributes );
	$has_custom_background_color = array_key_exists( 'customBackgroundColor', $attributes );
	$has_named_gradient          = array_key_exists( 'gradient', $attributes );
	$has_custom_gradient         = array_key_exists( 'customGradient', $attributes );
	$has_border_radius           = array_key_exists( 'borderRadius', $attributes );
	$has_font_size               = array_key_exists( 'fontSize', $attributes );
	$has_named_border_color      = array_key_exists( 'borderColor', $attributes );

	if ( $has_font_size ) {
		$classes[] = 'has-' . $attributes['fontSize'] . '-font-size';
		$classes[] = 'has-custom-font-size';
	}

	if ( $has_class_name ) {
		$classes[] = $attributes['className'];
	}

	if ( $has_named_text_color || $has_custom_text_color ) {
		$classes[] = 'has-text-color';
	}
	if ( $has_named_text_color ) {
		$classes[] = sprintf( 'has-%s-color', $attributes['textColor'] );
	}

	if ( $has_named_border_color ) {
		$classes[] = sprintf( 'has-%s-border-color', $attributes['borderColor'] );
	}

	if (
		$has_named_background_color ||
		$has_custom_background_color ||
		$has_named_gradient ||
		$has_custom_gradient
	) {
		$classes[] = 'has-background';
	}
	if ( $has_named_background_color && ! $has_custom_gradient ) {
		$classes[] = sprintf( 'has-%s-background-color', $attributes['backgroundColor'] );
	}
	if ( $has_named_gradient ) {
		$classes[] = sprintf( 'has-%s-gradient-background', $attributes['gradient'] );
	}

	// phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual
	if ( $has_border_radius && 0 == $attributes['borderRadius'] ) {
		$classes[] = 'no-border-radius';
	}

	return implode( ' ', $classes );
}

/**
 * Get the Button block styles.
 *
 * @param array $attributes Array containing the block attributes.
 *
 * @return string
 */
function get_button_styles( $attributes ) {
	$styles                      = array();
	$has_named_text_color        = array_key_exists( 'textColor', $attributes );
	$has_custom_text_color       = array_key_exists( 'customTextColor', $attributes );
	$has_named_background_color  = array_key_exists( 'backgroundColor', $attributes );
	$has_custom_background_color = array_key_exists( 'customBackgroundColor', $attributes );
	$has_named_gradient          = array_key_exists( 'gradient', $attributes );
	$has_custom_gradient         = array_key_exists( 'customGradient', $attributes );
	$has_border_radius           = array_key_exists( 'borderRadius', $attributes );
	$has_font_family             = array_key_exists( 'fontFamily', $attributes );
	$has_typography_styles       = array_key_exists( 'style', $attributes ) && array_key_exists( 'typography', $attributes['style'] );
	$has_custom_font_size        = $has_typography_styles && array_key_exists( 'fontSize', $attributes['style']['typography'] );
	$has_custom_text_transform   = $has_typography_styles && array_key_exists( 'textTransform', $attributes['style']['typography'] );
	$border_styles               = array();
	$border_attribute            = $attributes['style']['border'] ?? null;
	$is_border_style_array       = is_array( $border_attribute );

	$has_custom_border_color = $is_border_style_array && isset( $border_attribute['color'] );
	$has_border_style        = $is_border_style_array && isset( $border_attribute['style'] );
	$has_border_width        = $is_border_style_array && isset( $border_attribute['width'] );
	$has_individual_borders  = $is_border_style_array && (
		isset( $border_attribute['top'] ) ||
		isset( $border_attribute['right'] ) ||
		isset( $border_attribute['bottom'] ) ||
		isset( $border_attribute['left'] )
	);

	if ( $has_font_family ) {
		$styles[] = sprintf( 'font-family: %s;', $attributes['fontFamily'] );
	}

	if ( $has_custom_font_size ) {
		$styles[] = sprintf( 'font-size: %s;', $attributes['style']['typography']['fontSize'] );
	}

	if ( $has_custom_text_transform ) {
		$styles[] = sprintf( 'text-transform: %s;', $attributes['style']['typography']['textTransform'] );
	}

	if ( ! $has_named_text_color && $has_custom_text_color ) {
		$styles[] = sprintf( 'color: %s;', $attributes['customTextColor'] );
	}

	if ( ! $has_named_background_color && ! $has_named_gradient && $has_custom_gradient ) {
		$styles[] = sprintf( 'background: %s;', $attributes['customGradient'] );
	}

	if (
		$has_custom_background_color &&
		! $has_named_background_color &&
		! $has_named_gradient &&
		! $has_custom_gradient
	) {
		$styles[] = sprintf( 'background-color: %s;', $attributes['customBackgroundColor'] );
	}

	// phpcs:ignore Universal.Operators.StrictComparisons.LooseNotEqual
	if ( $has_border_radius && 0 != $attributes['borderRadius'] ) {
		$styles[] = sprintf( 'border-radius: %spx;', $attributes['borderRadius'] );
	}

	if ( $has_custom_border_color ) {
		$border_styles['color'] = $attributes['style']['border']['color'];
	}

	if ( $has_border_style ) {
		$border_styles['style'] = $attributes['style']['border']['style'];
	}

	if ( $has_border_width ) {
		$border_styles['width'] = $attributes['style']['border']['width'];
	}

	if ( $has_individual_borders ) {
		foreach ( array( 'top', 'right', 'bottom', 'left' ) as $side ) {
			$border = $attributes['style']['border'][ $side ] ?? null;
			if ( is_array( $border ) ) {
				$border_side_values     = array(
					'width' => $border['width'] ?? null,
					'color' => $border['color'] ?? null,
					'style' => $border['style'] ?? null,
				);
				$border_styles[ $side ] = $border_side_values;
			}
		}
	}

	$border_styles = wp_style_engine_get_styles( array( 'border' => $border_styles ) );
	if ( isset( $border_styles['css'] ) ) {
		$styles[] = $border_styles['css'];
	}

	return implode( ' ', $styles );
}

/**
 * Get the Button wrapper block styles.
 *
 * @param array $attributes Array containing the block attributes.
 *
 * @return string
 */
function get_button_wrapper_styles( $attributes ) {
	$styles    = array();
	$has_width = array_key_exists( 'width', $attributes );

	if ( $has_width && ! empty( $attributes['width'] ) ) {
		$styles[] = sprintf( 'width: %s;', $attributes['width'] );
	}

	return implode( ' ', $styles );
}

/**
 * Get filtered attributes.
 *
 * @param array  $attributes     Array containing the Button block attributes.
 * @param string $attribute_name String containing the attribute name to get.
 *
 * @return string
 */
function get_attribute( $attributes, $attribute_name ) {
	if ( isset( $attributes[ $attribute_name ] ) ) {
		return $attributes[ $attribute_name ];
	}

	$default_attributes = array(
		'url'               => '#',
		'element'           => 'a',
		'saveInPostContent' => false,
	);

	if ( isset( $default_attributes[ $attribute_name ] ) ) {
		return $default_attributes[ $attribute_name ];
	}
}

/**
 * Enqueue style for an existing block.
 *
 * The Jetpack Button block depends on styles from the core button block.
 * In case that block is not already within the post content, we can use
 * this function to ensure the block's style assets are enqueued.
 *
 * @param string $block_name Block type name including namespace.
 */
function enqueue_existing_button_style_dependency( $block_name ) {
	$existing_block = \WP_Block_Type_Registry::get_instance()->get_registered( $block_name );
	if ( isset( $existing_block ) && ! empty( $existing_block->style ) ) {
		wp_enqueue_style( $existing_block->style );
	}
}