<?php

namespace RoosterLMS\Display;

use RoosterLMS\Account\AccountViewer;
use RoosterLMS\Account\Render\Embed;
use RoosterLMS\Account\Section;
use RoosterLMS\Blocks\BlockRegistry;
use RoosterLMS\Core\Settings;
use RoosterLMS\UI\Assets;

defined( 'ABSPATH' ) || exit;

final class DisplayModule {

	public const BLOCKS = array(
		Render\CourseHeader::NAME  => Render\CourseHeader::class,
		Render\CourseIntro::NAME   => Render\CourseIntro::class,
		Render\CoursePoints::NAME  => Render\CoursePoints::class,
		Render\CourseText::NAME    => Render\CourseText::class,
		Render\CourseFiles::NAME   => Render\CourseFiles::class,
		Render\Faq::NAME           => Render\Faq::class,
		Render\CourseReviews::NAME => Render\CourseReviews::class,
		Render\ComingSoon::NAME    => Render\ComingSoon::class,
		Render\MyPoints::NAME      => Render\MyPoints::class,
		Render\Leaderboard::NAME   => Render\Leaderboard::class,
		Render\CourseTabs::NAME    => Render\CourseTabs::class,
		Render\CourseTab::NAME     => Render\CourseTab::class,
		Render\CourseMeta::NAME    => Render\CourseMeta::class,
		Render\CourseDetails::NAME => Render\CourseDetails::class,
		Render\CourseActions::NAME => Render\CourseActions::class,
	);

	private static bool $registered = false;

	public function register(): void {
		if ( self::$registered ) {
			return;
		}
		self::$registered = true;
		add_action( 'init', array( self::class, 'register_assets' ), 6 );
		add_action( 'init', array( self::class, 'register_blocks' ), 20 );
		add_action( 'init', array( self::class, 'add_shortcodes' ) );
		add_filter( 'rooster_lms_elementor_blocks', array( self::class, 'elementor_blocks' ) );
		add_filter( 'rooster_lms_account_sections', array( self::class, 'account_sections' ) );
		add_action( 'wp_head', array( CourseJsonLd::class, 'head' ), 30 );
	}

	public static function register_assets(): void {
		$url = plugins_url( 'assets/ui/', ROOSTER_LMS_FILE );
		wp_register_style( View::HANDLE, $url . 'course-page.css', array( Assets::UI_BUTTON, Assets::UI_BADGE ), Assets::ver( 'course-page.css' ) );
		wp_register_script(
			View::HANDLE,
			$url . 'course-page.js',
			array(),
			Assets::ver( 'course-page.js' ),
			array(
				'in_footer' => true,
				'strategy'  => 'defer',
			)
		);
		add_action( 'wp_print_footer_scripts', array( self::class, 'script_data' ), 1 );
	}

	public static function script_data(): void {
		if ( ! wp_script_is( View::HANDLE, 'enqueued' ) || ! empty( wp_scripts()->get_data( View::HANDLE, 'before' ) ) ) {
			return;
		}
		wp_add_inline_script( View::HANDLE, 'window.roosterLmsCoursePage = ' . wp_json_encode( self::script_settings() ) . ';', 'before' );
	}

	public static function script_settings(): array {
		return array(
			'root'  => esc_url_raw( rest_url( 'rooster-lms/v1/' ) ),
			'nonce' => is_user_logged_in() ? wp_create_nonce( 'wp_rest' ) : '',
			'l10n'  => array(
				'saved'      => __( 'Saved to your courses.', 'rooster-lms' ),
				'removed'    => __( 'Removed from your saved courses.', 'rooster-lms' ),
				'error'      => __( 'That did not work. Try again.', 'rooster-lms' ),
				'joined'     => __( 'You are on the waitlist. We will e-mail you when the course opens.', 'rooster-lms' ),
				'left'       => __( 'You left the waitlist.', 'rooster-lms' ),
				'confirm'    => __( 'Check your e-mail: open the link we sent to confirm.', 'rooster-lms' ),
				'badEmail'   => __( 'Enter a valid e-mail address.', 'rooster-lms' ),
				'tooMany'    => __( 'Too many requests. Try again later.', 'rooster-lms' ),
				'loginFirst' => __( 'Log in to save courses.', 'rooster-lms' ),
				'copied'     => __( 'The course address is copied.', 'rooster-lms' ),
			),
		);
	}

	public static function register_blocks(): void {
		foreach ( self::BLOCKS as $name => $class ) {
			$dir = BlockRegistry::build_dir() . $name;
			if ( ! is_file( $dir . '/block.json' ) || BlockRegistry::is_registered( $name ) ) {
				continue;
			}
			$type = register_block_type( $dir, array( 'render_callback' => array( $class, 'render' ) ) );
			if ( false === $type ) {
				continue;
			}
			$handle = generate_block_asset_handle( 'rooster-lms/' . $name, 'editorScript' );
			if ( wp_script_is( $handle, 'registered' ) ) {
				wp_set_script_translations( $handle, 'rooster-lms', ROOSTER_LMS_DIR . 'languages' );
			}
		}
	}

	public static function add_shortcodes(): void {
		foreach ( self::BLOCKS as $class ) {
			if ( '' !== $class::SHORTCODE ) {
				add_shortcode( $class::SHORTCODE, array( $class, 'shortcode' ) );
			}
		}
	}

	public static function shortcode( string $name, string $tag, array $spec, $atts ): string {
		$attributes = self::block_attributes( $tag, $spec, is_array( $atts ) ? $atts : array() );
		if ( BlockRegistry::is_registered( $name ) ) {
			return render_block(
				array(
					'blockName'    => 'rooster-lms/' . $name,
					'attrs'        => $attributes,
					'innerHTML'    => '',
					'innerContent' => array(),
					'innerBlocks'  => array(),
				)
			);
		}
		$class = self::BLOCKS[ $name ] ?? '';
		return '' === $class ? '' : (string) $class::render( $attributes );
	}

	public static function block_attributes( string $tag, array $spec, array $atts ): array {
		$atts = shortcode_atts( array_fill_keys( array_keys( $spec ), null ), $atts, $tag );
		$out  = array();
		foreach ( $spec as $key => $target ) {
			if ( null === $atts[ $key ] || ! is_scalar( $atts[ $key ] ) ) {
				continue;
			}
			$value             = (string) $atts[ $key ];
			$out[ $target[0] ] = match ( $target[1] ) {
				'int' => max( 0, (int) $value ),
				'bool' => (bool) filter_var( $value, FILTER_VALIDATE_BOOLEAN ),
				'key' => sanitize_key( $value ),
				default => sanitize_text_field( $value ),
			};
		}
		return $out;
	}

	public static function elementor_blocks( $blocks ) {
		if ( is_array( $blocks ) ) {
			foreach ( self::BLOCKS as $name => $class ) {
				if ( '' !== $class::SHORTCODE ) {
					$blocks[] = $name;
				}
			}
		}
		return $blocks;
	}

	public static function account_sections( $sections ) {
		if ( ! is_array( $sections ) ) {
			return $sections;
		}
		$sections[] = new Section(
			'points',
			__( 'My points', 'rooster-lms' ),
			'progress',
			'learner',
			40,
			static fn( AccountViewer $v ): bool => (bool) Settings::get( 'points_enabled' ),
			static fn(): string => Embed::block( Render\MyPoints::NAME, array( 'showHeading' => false ) ) . Embed::block( Render\Leaderboard::NAME ),
			null,
			'trending'
		);
		$sections[] = new Section(
			'saved',
			__( 'Saved courses', 'rooster-lms' ),
			'main',
			'learner',
			22,
			static fn( AccountViewer $v ): bool => true,
			static fn(): string => Embed::block(
				'course-grid',
				array(
					'show'         => 'saved',
					'perPage'      => 12,
					'columns'      => 3,
					'showWishlist' => true,
				)
			),
			null,
			'list'
		);
		return $sections;
	}
}