<?php
namespace AccessNow\SimpleLMS;

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

class Shortcodes {

	/**
	 * Shortcode tags => callbacks. The slms_* tags (pre-5.0.0) stay registered as aliases.
	 */
	const TAGS = array(
		'accessnow_slms_course_catalog'    => 'course_catalog',
		'accessnow_slms_my_courses'        => 'my_courses',
		'accessnow_slms_student_dashboard' => 'student_dashboard',
		'slms_course_catalog'              => 'course_catalog',
		'slms_my_courses'                  => 'my_courses',
		'slms_student_dashboard'           => 'student_dashboard',
	);

	public static function init() {
		foreach ( self::TAGS as $tag => $method ) {
			add_shortcode( $tag, array( __CLASS__, $method ) );
		}
	}

	public static function course_catalog( $atts ) {
		$atts = shortcode_atts(
			array(
				'per_page' => 12,
				'lang'     => '',
			),
			$atts,
			'accessnow_slms_course_catalog'
		);

		$active_lang = $atts['lang'] ? $atts['lang'] : I18n::get_requested_language();

		$query_args = array(
			'post_type'      => 'slms_course',
			'posts_per_page' => intval( $atts['per_page'] ),
			'post_status'    => 'publish',
			'orderby'        => 'title',
			'order'          => 'ASC',
		);

		if ( $active_lang && isset( I18n::get_supported_languages()[ $active_lang ] ) ) {
			$query_args['meta_query'] = array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query -- course language is stored as post meta.
				array(
					'key'   => I18n::META_KEY,
					'value' => $active_lang,
				),
			);
		}

		$courses = get_posts( $query_args );

		ob_start();
		echo '<div class="slms-course-catalog">';

		if ( ! $atts['lang'] ) {
			Template_Loader::get_partial( 'language-filter.php', array( 'active_lang' => $active_lang ) );
		}

		if ( empty( $courses ) ) {
			echo '<p>' . esc_html__( 'No courses available yet.', 'accessnow-lms' ) . '</p>';
		} else {
			echo '<div class="slms-course-grid">';
			foreach ( $courses as $course ) {
				Template_Loader::get_partial( 'course-card.php', array( 'course' => $course ) );
			}
			echo '</div>';
		}
		echo '</div>';
		return ob_get_clean();
	}

	public static function my_courses( $atts ) {
		if ( ! is_user_logged_in() ) {
			return '<p>' . esc_html__( 'Please log in to view your courses.', 'accessnow-lms' ) . '</p>';
		}

		$user_id     = get_current_user_id();
		$enrollments = array();
		// Completed courses stay listed. One card per course: the active run wins over an older completed one.
		foreach ( Enrollment::get_user_enrollments( $user_id, array( 'active', 'completed' ) ) as $e ) {
			if ( ! isset( $enrollments[ $e->course_id ] ) || 'active' === $e->status ) {
				$enrollments[ $e->course_id ] = $e;
			}
		}

		ob_start();
		echo '<div class="slms-my-courses">';
		if ( empty( $enrollments ) ) {
			echo '<p>' . esc_html__( 'You are not enrolled in any courses yet.', 'accessnow-lms' ) . '</p>';
			printf( '<a href="%s" class="slms-btn">%s</a>', esc_url( get_post_type_archive_link( 'slms_course' ) ), esc_html__( 'Browse Courses', 'accessnow-lms' ) );
		} else {
			echo '<div class="slms-course-grid">';
			foreach ( $enrollments as $e ) {
				$course = get_post( $e->course_id );
				if ( $course ) {
					Template_Loader::get_partial(
						'course-card.php',
						array(
							'course'        => $course,
							'show_progress' => true,
						)
					);
				}
			}
			echo '</div>';
		}
		echo '</div>';
		return ob_get_clean();
	}

	public static function student_dashboard( $atts ) {
		if ( ! is_user_logged_in() ) {
			return '<p>' . esc_html__( 'Please log in to access your dashboard.', 'accessnow-lms' ) . '</p>';
		}

		ob_start();
		include ACCESSNOW_SLMS_PLUGIN_DIR . 'templates/dashboard.php';
		return ob_get_clean();
	}
}