<?php

namespace RoosterLMS\UI;

defined( 'ABSPATH' ) || exit;

final class LessonDock {

	public const COURSE_KEY = 'course';

	public function register(): void {
		add_filter( 'render_block_core/group', array( self::class, 'render' ), 10, 2 );
		add_filter( 'render_block_core/columns', array( self::class, 'render' ), 10, 2 );
		add_filter( 'render_block_core/column', array( self::class, 'render' ), 10, 2 );
	}

	public static function render( string $html, array $block ): string {
		$class   = isset( $block['attrs']['className'] ) && is_string( $block['attrs']['className'] ) ? $block['attrs']['className'] : '';
		$classes = preg_split( '/\s+/', $class );
		$classes = is_array( $classes ) ? $classes : array();
		foreach ( $classes as $one ) {
			if ( str_starts_with( $one, 'rooster-lms-template-' ) ) {
				return \RoosterLMS\Blocks\Markup::ui_mark( $html, 'template/' . substr( $one, strlen( 'rooster-lms-template-' ) ) );
			}
		}
		if ( array_intersect( array( 'rooster-lms-lesson-layout__aside', 'rooster-lesson__aside' ), $classes ) ) {
			return self::panel( $html, Dock::NAV, __( 'Contents', 'rooster-lms' ), 'lesson-sidebar' );
		}
		if ( array_intersect( array( 'rooster-lms-lesson-layout', 'rooster-lesson__columns' ), $classes ) ) {
			Assets::enqueue_part( Assets::LESSON_LAYOUT );
			return self::container( $html, Dock::NAV, 'lesson-layout' );
		}
		if ( array_intersect( array( 'rooster-lms-course-layout__aside', 'rooster-course__aside' ), $classes ) ) {
			return self::panel( $html, self::COURSE_KEY, __( 'Course details', 'rooster-lms' ), 'course-sidebar' );
		}
		if ( array_intersect( array( 'rooster-lms-course-layout', 'rooster-course__columns' ), $classes ) ) {
			Assets::enqueue_part( Assets::LESSON_LAYOUT );
			return self::container( $html, self::COURSE_KEY, 'course-layout' );
		}
		return $html;
	}

	private static function container( string $html, string $key, string $module ): string {
		$tags = new \WP_HTML_Tag_Processor( $html );
		if ( ! $tags->next_tag() ) {
			return $html;
		}
		$tags->set_attribute( 'data-rooster-ui', \RoosterLMS\Blocks\Markup::ui( $module ) );
		foreach ( Dock::attributes( $key ) as $name => $value ) {
			if ( 'class' === $name ) {
				foreach ( explode( ' ', $value ) as $one ) {
					$tags->add_class( $one );
				}
			} else {
				$tags->set_attribute( $name, $value );
			}
		}
		return $tags->get_updated_html();
	}

	private static function panel( string $html, string $key, string $title, string $module ): string {
		$state = Dock::panel_state( $key );
		$tags  = new \WP_HTML_Tag_Processor( $html );
		if ( ! $tags->next_tag() ) {
			return $html;
		}
		$tags->set_attribute( 'data-rooster-ui', \RoosterLMS\Blocks\Markup::ui( $module ) );
		foreach ( $state['classes'] as $one ) {
			$tags->add_class( $one );
		}
		$tags->set_attribute( 'data-rl-dock-panel', '' );
		if ( '' !== $state['style'] ) {
			$tags->set_attribute( 'style', $state['style'] );
		}
		$html = $tags->get_updated_html();
		$end  = strpos( $html, '>' );
		if ( false === $end ) {
			return $html;
		}
		return substr( $html, 0, $end + 1 ) . Dock::head( $title, Dock::layout( $key ), $state['folded'] ) . substr( $html, $end + 1 );
	}
}