<?php



#[AllowDynamicProperties]
final class WP_Style_Engine {
	
	const BLOCK_STYLE_DEFINITIONS_METADATA = array(
		'background' => array(
			'backgroundImage'      => array(
				'property_keys' => array(
					'default' => 'background-image',
				),
				'value_func'    => array( self::class, 'get_url_or_value_css_declaration' ),
				'path'          => array( 'background', 'backgroundImage' ),
			),
			'backgroundPosition'   => array(
				'property_keys' => array(
					'default' => 'background-position',
				),
				'path'          => array( 'background', 'backgroundPosition' ),
			),
			'backgroundRepeat'     => array(
				'property_keys' => array(
					'default' => 'background-repeat',
				),
				'path'          => array( 'background', 'backgroundRepeat' ),
			),
			'backgroundSize'       => array(
				'property_keys' => array(
					'default' => 'background-size',
				),
				'path'          => array( 'background', 'backgroundSize' ),
			),
			'backgroundAttachment' => array(
				'property_keys' => array(
					'default' => 'background-attachment',
				),
				'path'          => array( 'background', 'backgroundAttachment' ),
			),
		),
		'color'      => array(
			'text'       => array(
				'property_keys' => array(
					'default' => 'color',
				),
				'path'          => array( 'color', 'text' ),
				'css_vars'      => array(
					'color' => '--wp--preset--color--$slug',
				),
				'classnames'    => array(
					'has-text-color'  => true,
					'has-$slug-color' => 'color',
				),
			),
			'background' => array(
				'property_keys' => array(
					'default' => 'background-color',
				),
				'path'          => array( 'color', 'background' ),
				'css_vars'      => array(
					'color' => '--wp--preset--color--$slug',
				),
				'classnames'    => array(
					'has-background'             => true,
					'has-$slug-background-color' => 'color',
				),
			),
			'gradient'   => array(
				'property_keys' => array(
					'default' => 'background',
				),
				'path'          => array( 'color', 'gradient' ),
				'css_vars'      => array(
					'gradient' => '--wp--preset--gradient--$slug',
				),
				'classnames'    => array(
					'has-background'                => true,
					'has-$slug-gradient-background' => 'gradient',
				),
			),
		),
		'border'     => array(
			'color'  => array(
				'property_keys' => array(
					'default'    => 'border-color',
					'individual' => 'border-%s-color',
				),
				'path'          => array( 'border', 'color' ),
				'classnames'    => array(
					'has-border-color'       => true,
					'has-$slug-border-color' => 'color',
				),
			),
			'radius' => array(
				'property_keys' => array(
					'default'    => 'border-radius',
					'individual' => 'border-%s-radius',
				),
				'path'          => array( 'border', 'radius' ),
			),
			'style'  => array(
				'property_keys' => array(
					'default'    => 'border-style',
					'individual' => 'border-%s-style',
				),
				'path'          => array( 'border', 'style' ),
			),
			'width'  => array(
				'property_keys' => array(
					'default'    => 'border-width',
					'individual' => 'border-%s-width',
				),
				'path'          => array( 'border', 'width' ),
			),
			'top'    => array(
				'value_func' => array( self::class, 'get_individual_property_css_declarations' ),
				'path'       => array( 'border', 'top' ),
				'css_vars'   => array(
					'color' => '--wp--preset--color--$slug',
				),
			),
			'right'  => array(
				'value_func' => array( self::class, 'get_individual_property_css_declarations' ),
				'path'       => array( 'border', 'right' ),
				'css_vars'   => array(
					'color' => '--wp--preset--color--$slug',
				),
			),
			'bottom' => array(
				'value_func' => array( self::class, 'get_individual_property_css_declarations' ),
				'path'       => array( 'border', 'bottom' ),
				'css_vars'   => array(
					'color' => '--wp--preset--color--$slug',
				),
			),
			'left'   => array(
				'value_func' => array( self::class, 'get_individual_property_css_declarations' ),
				'path'       => array( 'border', 'left' ),
				'css_vars'   => array(
					'color' => '--wp--preset--color--$slug',
				),
			),
		),
		'shadow'     => array(
			'shadow' => array(
				'property_keys' => array(
					'default' => 'box-shadow',
				),
				'path'          => array( 'shadow' ),
				'css_vars'      => array(
					'shadow' => '--wp--preset--shadow--$slug',
				),
			),
		),
		'dimensions' => array(
			'aspectRatio' => array(
				'property_keys' => array(
					'default' => 'aspect-ratio',
				),
				'path'          => array( 'dimensions', 'aspectRatio' ),
				'classnames'    => array(
					'has-aspect-ratio' => true,
				),
			),
			'minHeight'   => array(
				'property_keys' => array(
					'default' => 'min-height',
				),
				'path'          => array( 'dimensions', 'minHeight' ),
				'css_vars'      => array(
					'spacing' => '--wp--preset--spacing--$slug',
				),
			),
		),
		'spacing'    => array(
			'padding' => array(
				'property_keys' => array(
					'default'    => 'padding',
					'individual' => 'padding-%s',
				),
				'path'          => array( 'spacing', 'padding' ),
				'css_vars'      => array(
					'spacing' => '--wp--preset--spacing--$slug',
				),
			),
			'margin'  => array(
				'property_keys' => array(
					'default'    => 'margin',
					'individual' => 'margin-%s',
				),
				'path'          => array( 'spacing', 'margin' ),
				'css_vars'      => array(
					'spacing' => '--wp--preset--spacing--$slug',
				),
			),
		),
		'typography' => array(
			'fontSize'       => array(
				'property_keys' => array(
					'default' => 'font-size',
				),
				'path'          => array( 'typography', 'fontSize' ),
				'css_vars'      => array(
					'font-size' => '--wp--preset--font-size--$slug',
				),
				'classnames'    => array(
					'has-$slug-font-size' => 'font-size',
				),
			),
			'fontFamily'     => array(
				'property_keys' => array(
					'default' => 'font-family',
				),
				'css_vars'      => array(
					'font-family' => '--wp--preset--font-family--$slug',
				),
				'path'          => array( 'typography', 'fontFamily' ),
				'classnames'    => array(
					'has-$slug-font-family' => 'font-family',
				),
			),
			'fontStyle'      => array(
				'property_keys' => array(
					'default' => 'font-style',
				),
				'path'          => array( 'typography', 'fontStyle' ),
			),
			'fontWeight'     => array(
				'property_keys' => array(
					'default' => 'font-weight',
				),
				'path'          => array( 'typography', 'fontWeight' ),
			),
			'lineHeight'     => array(
				'property_keys' => array(
					'default' => 'line-height',
				),
				'path'          => array( 'typography', 'lineHeight' ),
			),
			'textColumns'    => array(
				'property_keys' => array(
					'default' => 'column-count',
				),
				'path'          => array( 'typography', 'textColumns' ),
			),
			'textDecoration' => array(
				'property_keys' => array(
					'default' => 'text-decoration',
				),
				'path'          => array( 'typography', 'textDecoration' ),
			),
			'textTransform'  => array(
				'property_keys' => array(
					'default' => 'text-transform',
				),
				'path'          => array( 'typography', 'textTransform' ),
			),
			'letterSpacing'  => array(
				'property_keys' => array(
					'default' => 'letter-spacing',
				),
				'path'          => array( 'typography', 'letterSpacing' ),
			),
			'writingMode'    => array(
				'property_keys' => array(
					'default' => 'writing-mode',
				),
				'path'          => array( 'typography', 'writingMode' ),
			),
		),
	);

	
	protected static function get_slug_from_preset_value( $style_value, $property_key ) {
		if ( is_string( $style_value ) && is_string( $property_key )
			&& str_contains( $style_value, "var:preset|{$property_key}|" )
		) {
			$index_to_splice = strrpos( $style_value, '|' ) + 1;
			return _wp_to_kebab_case( substr( $style_value, $index_to_splice ) );
		}
		return '';
	}

	
	protected static function get_css_var_value( $style_value, $css_vars ) {
		foreach ( $css_vars as $property_key => $css_var_pattern ) {
			$slug = static::get_slug_from_preset_value( $style_value, $property_key );
			if ( static::is_valid_style_value( $slug ) ) {
				$var = strtr(
					$css_var_pattern,
					array( '$slug' => $slug )
				);
				return "var($var)";
			}
		}
		return '';
	}

	
	protected static function is_valid_style_value( $style_value ) {
		return '0' === $style_value || ! empty( $style_value );
	}

	
	public static function store_css_rule( $store_name, $css_selector, $css_declarations, $rules_group = '' ) {
		if ( empty( $store_name ) || empty( $css_selector ) || empty( $css_declarations ) ) {
			return;
		}
		static::get_store( $store_name )->add_rule( $css_selector, $rules_group )->add_declarations( $css_declarations );
	}

	
	public static function get_store( $store_name ) {
		return WP_Style_Engine_CSS_Rules_Store::get_store( $store_name );
	}

	
	public static function parse_block_styles( $block_styles, $options ) {
		$parsed_styles = array(
			'classnames'   => array(),
			'declarations' => array(),
		);
		if ( empty( $block_styles ) || ! is_array( $block_styles ) ) {
			return $parsed_styles;
		}

		// Collect CSS and classnames.
		foreach ( static::BLOCK_STYLE_DEFINITIONS_METADATA as $definition_group_key => $definition_group_style ) {
			if ( empty( $block_styles[ $definition_group_key ] ) ) {
				continue;
			}
			foreach ( $definition_group_style as $style_definition ) {
				$style_value = _wp_array_get( $block_styles, $style_definition['path'], null );

				if ( ! static::is_valid_style_value( $style_value ) ) {
					continue;
				}

				$classnames = static::get_classnames( $style_value, $style_definition );
				if ( ! empty( $classnames ) ) {
					$parsed_styles['classnames'] = array_merge( $parsed_styles['classnames'], $classnames );
				}

				$css_declarations = static::get_css_declarations( $style_value, $style_definition, $options );
				if ( ! empty( $css_declarations ) ) {
					$parsed_styles['declarations'] = array_merge( $parsed_styles['declarations'], $css_declarations );
				}
			}
		}

		return $parsed_styles;
	}

	
	protected static function get_classnames( $style_value, $style_definition ) {
		if ( empty( $style_value ) ) {
			return array();
		}

		$classnames = array();
		if ( ! empty( $style_definition['classnames'] ) ) {
			foreach ( $style_definition['classnames'] as $classname => $property_key ) {
				if ( true === $property_key ) {
					$classnames[] = $classname;
					continue;
				}

				$slug = static::get_slug_from_preset_value( $style_value, $property_key );

				if ( $slug ) {
					/*
					 * Right now we expect a classname pattern to be stored in BLOCK_STYLE_DEFINITIONS_METADATA.
					 * One day, if there are no stored schemata, we could allow custom patterns or
					 * generate classnames based on other properties
					 * such as a path or a value or a prefix passed in options.
					 */
					$classnames[] = strtr( $classname, array( '$slug' => $slug ) );
				}
			}
		}

		return $classnames;
	}

	
	protected static function get_css_declarations( $style_value, $style_definition, $options = array() ) {
		if ( isset( $style_definition['value_func'] ) && is_callable( $style_definition['value_func'] ) ) {
			return call_user_func( $style_definition['value_func'], $style_value, $style_definition, $options );
		}

		$css_declarations     = array();
		$style_property_keys  = $style_definition['property_keys'];
		$should_skip_css_vars = isset( $options['convert_vars_to_classnames'] ) && true === $options['convert_vars_to_classnames'];

		/*
		 * Build CSS var values from `var:preset|<PRESET_TYPE>|<PRESET_SLUG>` values, e.g, `var(--wp--css--rule-slug )`.
		 * Check if the value is a CSS preset and there's a corresponding css_var pattern in the style definition.
		 */
		if ( is_string( $style_value ) && str_contains( $style_value, 'var:' ) ) {
			if ( ! $should_skip_css_vars && ! empty( $style_definition['css_vars'] ) ) {
				$css_var = static::get_css_var_value( $style_value, $style_definition['css_vars'] );
				if ( static::is_valid_style_value( $css_var ) ) {
					$css_declarations[ $style_property_keys['default'] ] = $css_var;
				}
			}
			return $css_declarations;
		}

		/*
		 * Default rule builder.
		 * If the input contains an array, assume box model-like properties
		 * for styles such as margins and padding.
		 */
		if ( is_array( $style_value ) ) {
			// Bail out early if the `'individual'` property is not defined.
			if ( ! isset( $style_property_keys['individual'] ) ) {
				return $css_declarations;
			}

			foreach ( $style_value as $key => $value ) {
				if ( is_string( $value ) && str_contains( $value, 'var:' ) && ! $should_skip_css_vars && ! empty( $style_definition['css_vars'] ) ) {
					$value = static::get_css_var_value( $value, $style_definition['css_vars'] );
				}

				$individual_property = sprintf( $style_property_keys['individual'], _wp_to_kebab_case( $key ) );

				if ( $individual_property && static::is_valid_style_value( $value ) ) {
					$css_declarations[ $individual_property ] = $value;
				}
			}

			return $css_declarations;
		}

		$css_declarations[ $style_property_keys['default'] ] = $style_value;
		return $css_declarations;
	}

	
	protected static function get_individual_property_css_declarations( $style_value, $individual_property_definition, $options = array() ) {
		if ( ! is_array( $style_value ) || empty( $style_value ) || empty( $individual_property_definition['path'] ) ) {
			return array();
		}

		/*
		 * The first item in $individual_property_definition['path'] array
		 * tells us the style property, e.g. "border". We use this to get a corresponding
		 * CSS style definition such as "color" or "width" from the same group.
		 *
		 * The second item in $individual_property_definition['path'] array
		 * refers to the individual property marker, e.g. "top".
		 */
		$definition_group_key    = $individual_property_definition['path'][0];
		$individual_property_key = $individual_property_definition['path'][1];
		$should_skip_css_vars    = isset( $options['convert_vars_to_classnames'] ) && true === $options['convert_vars_to_classnames'];
		$css_declarations        = array();

		foreach ( $style_value as $css_property => $value ) {
			if ( empty( $value ) ) {
				continue;
			}

			// Build a path to the individual rules in definitions.
			$style_definition_path = array( $definition_group_key, $css_property );
			$style_definition      = _wp_array_get( static::BLOCK_STYLE_DEFINITIONS_METADATA, $style_definition_path, null );

			if ( $style_definition && isset( $style_definition['property_keys']['individual'] ) ) {
				// Set a CSS var if there is a valid preset value.
				if ( is_string( $value ) && str_contains( $value, 'var:' )
					&& ! $should_skip_css_vars && ! empty( $individual_property_definition['css_vars'] )
				) {
					$value = static::get_css_var_value( $value, $individual_property_definition['css_vars'] );
				}

				$individual_css_property = sprintf( $style_definition['property_keys']['individual'], $individual_property_key );

				$css_declarations[ $individual_css_property ] = $value;
			}
		}
		return $css_declarations;
	}

	
	protected static function get_url_or_value_css_declaration( $style_value, $style_definition ) {
		if ( empty( $style_value ) ) {
			return array();
		}

		$css_declarations = array();

		if ( isset( $style_definition['property_keys']['default'] ) ) {
			$value = null;

			if ( ! empty( $style_value['url'] ) ) {
				$value = "url('" . $style_value['url'] . "')";
			} elseif ( is_string( $style_value ) ) {
				$value = $style_value;
			}

			if ( null !== $value ) {
				$css_declarations[ $style_definition['property_keys']['default'] ] = $value;
			}
		}

		return $css_declarations;
	}

	
	public static function compile_css( $css_declarations, $css_selector ) {
		if ( empty( $css_declarations ) || ! is_array( $css_declarations ) ) {
			return '';
		}

		// Return an entire rule if there is a selector.
		if ( $css_selector ) {
			$css_rule = new WP_Style_Engine_CSS_Rule( $css_selector, $css_declarations );
			return $css_rule->get_css();
		}

		$css_declarations = new WP_Style_Engine_CSS_Declarations( $css_declarations );
		return $css_declarations->get_declarations_string();
	}

	
	public static function compile_stylesheet_from_css_rules( $css_rules, $options = array() ) {
		$processor = new WP_Style_Engine_Processor();
		$processor->add_rules( $css_rules );
		return $processor->get_css( $options );
	}
}