<?php

namespace RoosterLMS\CourseBuilder;

use RoosterLMS\Admin\CategoryTreePage;
use RoosterLMS\Admin\Home\Prefs;
use RoosterLMS\Content\PostTypes;
use RoosterLMS\Core\Settings;

defined( 'ABSPATH' ) || exit;

final class EditorPreference {

	public const DESIGNER = 'designer';

	public const BLOCK = 'block';

	public const CHOICES = array( self::DESIGNER, self::BLOCK );

	public const PREF = Prefs::EDITOR;

	public static function site(): string {
		$stored = get_option( Settings::OPTION, array() );
		$value  = is_array( $stored ) && is_string( $stored[ EditorSettings::KEY ] ?? null ) ? strtolower( trim( $stored[ EditorSettings::KEY ] ) ) : '';
		return self::BLOCK === $value ? self::BLOCK : self::DESIGNER;
	}

	public static function choice( int $user_id ): string {
		$value = $user_id > 0 ? Prefs::get( $user_id, Prefs::EDITOR ) : null;
		return is_string( $value ) && in_array( $value, self::CHOICES, true ) ? $value : '';
	}

	public static function can_use_designer( int $user_id ): bool {
		if ( $user_id <= 0 || ! self::built() ) {
			return false;
		}
		return get_current_user_id() === $user_id ? current_user_can( Access::PAGE_CAP ) : user_can( $user_id, Access::PAGE_CAP ); // phpcs:ignore WordPress.WP.Capabilities.Unknown -- the course post type's primitive (Core\Capabilities).
	}

	public static function built(): bool {
		$dir  = CategoryTreePage::build_dir();
		$root = untrailingslashit( wp_normalize_path( ROOSTER_LMS_DIR ) );
		return '' !== $dir && str_starts_with( $dir . '/', $root . '/' ) && is_readable( $dir . '/' . Script::ENTRY . '.js' ) && is_readable( $dir . '/' . Script::ENTRY . '.asset.php' );
	}

	public static function may_choose( int $user_id ): bool {
		return self::can_use_designer( $user_id );
	}

	public static function for_user( int $user_id ): string {
		$choice = self::choice( $user_id );
		$want   = '' !== $choice ? $choice : self::site();
		return self::DESIGNER === $want && self::can_use_designer( $user_id ) ? self::DESIGNER : self::BLOCK;
	}

	public static function set( int $user_id, string $editor ): bool {
		return in_array( $editor, self::CHOICES, true ) && self::may_choose( $user_id ) && Prefs::set( $user_id, Prefs::EDITOR, $editor );
	}

	public static function block_url( int $post_id ): string {
		return $post_id > 0 ? admin_url( 'post.php?post=' . $post_id . '&action=edit' ) : '';
	}

	public static function url( int $user_id, string $block, string $designer ): string {
		if ( '' !== $designer && self::DESIGNER === self::for_user( $user_id ) ) {
			return $designer;
		}
		return $block;
	}

	public static function actions( int $user_id, string $block, string $designer ): array {
		$designer = self::can_use_designer( $user_id ) ? $designer : '';
		$primary  = self::url( $user_id, $block, $designer );
		if ( '' === $primary ) {
			return '' !== $designer ? array( self::designer_action( $designer ) ) : array();
		}
		$out = array(
			array(
				'id'    => 'edit',
				'label' => __( 'Edit', 'rooster-lms' ),
				'href'  => $primary,
			),
		);
		if ( $primary === $designer && '' !== $block ) {
			$out[] = array(
				'id'    => 'block-editor',
				'label' => self::other_label( self::BLOCK ),
				'href'  => $block,
			);
		} elseif ( $primary !== $designer && '' !== $designer ) {
			$out[] = self::designer_action( $designer );
		}
		return $out;
	}

	public static function other_label( string $editor ): string {
		return self::BLOCK === $editor ? __( 'Edit in the block editor', 'rooster-lms' ) : __( 'Edit with Designer', 'rooster-lms' );
	}

	private static function designer_action( string $designer ): array {
		return array(
			'id'    => 'designer',
			'label' => self::other_label( self::DESIGNER ),
			'href'  => $designer,
		);
	}

	public static function post_urls( \WP_Post $post, int $user_id ): array {
		if ( ! in_array( $post->post_type, array( PostTypes::COURSE, PostTypes::LESSON, PostTypes::QUIZ ), true ) || ! user_can( $user_id, 'edit_post', $post->ID ) ) {
			return array( '', '' );
		}
		return array( self::block_url( (int) $post->ID ), self::can_use_designer( $user_id ) ? EditorSwitch::url_for_post( $post, $user_id ) : '' );
	}
}