<?php
namespace AccessNow\SimpleLMS;

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

class Frontend {

	public static function init() {
		add_action( 'wp_enqueue_scripts', array( __CLASS__, 'enqueue_assets' ) );
	}

	/**
	 * Register the public stylesheet and the local-time script, so the blocks (block.json "style"
	 * and "viewScript") and the pages below share one handle each.
	 */
	public static function register_assets() {
		if ( ! wp_style_is( 'slms-public', 'registered' ) ) {
			wp_register_style( 'slms-public', ACCESSNOW_SLMS_PLUGIN_URL . 'assets/css/slms-public.css', array( 'dashicons' ), ACCESSNOW_SLMS_VERSION );
		}
		if ( ! wp_script_is( 'slms-local-time', 'registered' ) ) {
			wp_register_script( 'slms-local-time', ACCESSNOW_SLMS_PLUGIN_URL . 'assets/js/slms-local-time.js', array(), ACCESSNOW_SLMS_VERSION, true );
		}
	}

	public static function enqueue_assets() {
		if ( ! is_singular( array( 'slms_course', 'slms_lesson', 'slms_quiz' ) )
			&& ! is_post_type_archive( 'slms_course' )
			&& ! self::is_slms_shortcode_page() ) {
			return;
		}

		self::register_assets();
		wp_enqueue_style( 'slms-public' );
		wp_enqueue_script( 'slms-local-time' );

		if ( is_singular( 'slms_quiz' ) || is_singular( 'slms_lesson' ) ) {
			wp_enqueue_script( 'slms-quiz', ACCESSNOW_SLMS_PLUGIN_URL . 'assets/js/slms-quiz.js', array( 'jquery' ), ACCESSNOW_SLMS_VERSION, true );
			wp_localize_script(
				'slms-quiz',
				'slms_quiz',
				array(
					'ajax_url'     => admin_url( 'admin-ajax.php' ),
					'nonce'        => wp_create_nonce( 'accessnow_slms_quiz' ),
					'hide_results' => __( 'Hide My Results', 'accessnow-lms' ),
					'show_results' => __( 'Show My Results', 'accessnow-lms' ),
					'submitting'   => __( 'Submitting...', 'accessnow-lms' ),
					'quiz_results' => __( 'Quiz Results', 'accessnow-lms' ),
					'score_label'  => __( 'Score: ', 'accessnow-lms' ),
					'passed'       => __( 'Passed!', 'accessnow-lms' ),
					'failed'       => __( 'Failed', 'accessnow-lms' ),
					'question'     => __( 'Question', 'accessnow-lms' ),
					'try_again'    => __( 'Try Again', 'accessnow-lms' ),
					'submit_quiz'  => __( 'Submit Quiz', 'accessnow-lms' ),
					'error'        => __( 'An error occurred. Please try again.', 'accessnow-lms' ),
					'time_up'      => __( 'Time ran out before this quiz was submitted, so this attempt scored 0.', 'accessnow-lms' ),
					'your_answer'  => __( 'Your answer:', 'accessnow-lms' ),
					'right_answer' => __( 'Correct answer:', 'accessnow-lms' ),
					'explanation'  => __( 'Why:', 'accessnow-lms' ),
					'correct'      => __( 'Correct', 'accessnow-lms' ),
					'incorrect'    => __( 'Incorrect', 'accessnow-lms' ),
					'to_be_marked' => __( 'To be marked', 'accessnow-lms' ),
					'awaiting_review' => __( 'Thanks: your answers are in. Part of this quiz is marked by hand, so your score will appear once it has been marked.', 'accessnow-lms' ),
					/* translators: 1: current question number, 2: total number of questions. */
					'question_of'  => __( 'Question %1$s of %2$s', 'accessnow-lms' ),
					/* translators: %d: minutes left (5). */
					'minutes_left' => __( '%d minutes left.', 'accessnow-lms' ),
					'minute_left'  => __( 'One minute left.', 'accessnow-lms' ),
					/* translators: %d: seconds left (30). */
					'seconds_left' => __( '%d seconds left.', 'accessnow-lms' ),
					'time_is_up'   => __( 'Time is up. Submitting your answers.', 'accessnow-lms' ),
				)
			);
		}

		if ( is_singular( 'slms_lesson' ) || is_singular( 'slms_course' ) ) {
			$progress_strings = array(
				'ajax_url'         => admin_url( 'admin-ajax.php' ),
				'nonce'            => wp_create_nonce( 'accessnow_slms_progress' ),
				'enrolling'        => __( 'Enrolling...', 'accessnow-lms' ),
				'enroll_now'       => __( 'Enroll Now', 'accessnow-lms' ),
				'saving'           => __( 'Saving...', 'accessnow-lms' ),
				'completed'        => __( 'Completed', 'accessnow-lms' ),
				'course_completed' => __( 'Congratulations! You have completed this course!', 'accessnow-lms' ),
				'mark_complete'    => __( 'Mark as Complete', 'accessnow-lms' ),
				'error'            => __( 'An error occurred. Please try again.', 'accessnow-lms' ),
				'back_to_course'   => __( 'Back to the course', 'accessnow-lms' ),
			);
		}

		if ( is_singular( 'slms_lesson' ) ) {
			wp_enqueue_script( 'slms-progress', ACCESSNOW_SLMS_PLUGIN_URL . 'assets/js/slms-progress.js', array( 'jquery' ), ACCESSNOW_SLMS_VERSION, true );
			wp_localize_script( 'slms-progress', 'slms_progress', $progress_strings );

			wp_enqueue_script( 'slms-notes', ACCESSNOW_SLMS_PLUGIN_URL . 'assets/js/slms-notes.js', array( 'jquery' ), ACCESSNOW_SLMS_VERSION, true );
			wp_localize_script(
				'slms-notes',
				'slms_notes',
				array(
					'ajax_url'     => admin_url( 'admin-ajax.php' ),
					'nonce'        => wp_create_nonce( 'accessnow_slms_notes' ),
					'unsaved'      => __( 'Unsaved changes...', 'accessnow-lms' ),
					'saving'       => __( 'Saving...', 'accessnow-lms' ),
					'saved'        => __( 'Saved', 'accessnow-lms' ),
					'error_saving' => __( 'Error saving note', 'accessnow-lms' ),
				)
			);
		}

		if ( is_singular( 'slms_course' ) ) {
			wp_enqueue_script( 'slms-progress', ACCESSNOW_SLMS_PLUGIN_URL . 'assets/js/slms-progress.js', array( 'jquery' ), ACCESSNOW_SLMS_VERSION, true );
			wp_localize_script( 'slms-progress', 'slms_progress', $progress_strings );

			if ( ! is_user_logged_in() ) {
				wp_enqueue_script( 'slms-auth', ACCESSNOW_SLMS_PLUGIN_URL . 'assets/js/slms-auth.js', array( 'jquery' ), ACCESSNOW_SLMS_VERSION, true );
				wp_localize_script(
					'slms-auth',
					'slms_auth',
					array(
						'ajax_url'       => admin_url( 'admin-ajax.php' ),
						'nonce'          => wp_create_nonce( 'accessnow_slms_auth' ),
						'log_in'         => __( 'Log In', 'accessnow-lms' ),
						'logging_in'     => __( 'Logging in...', 'accessnow-lms' ),
						'create_account' => __( 'Create Account', 'accessnow-lms' ),
						'creating'       => __( 'Creating account...', 'accessnow-lms' ),
						'error'          => __( 'An error occurred. Please try again.', 'accessnow-lms' ),
					)
				);
			}
		}
	}

	/**
	 * The header image for any SLMS post: its own, else its unit's or course's (see Lesson_Header).
	 * Kept for theme templates copied from earlier versions.
	 */
	public static function get_effective_thumbnail_id( $post_id ) {
		return Lesson_Header::image_id( $post_id );
	}

	/**
	 * Whether the current post shows one of the plugin's shortcodes or blocks.
	 *
	 * @return bool
	 */
	private static function is_slms_shortcode_page() {
		global $post;
		if ( ! $post ) {
			return false;
		}
		foreach ( array_keys( Shortcodes::TAGS ) as $tag ) {
			if ( has_shortcode( $post->post_content, $tag ) ) {
				return true;
			}
		}
		foreach ( Blocks::names() as $block ) {
			if ( has_block( $block, $post ) ) {
				return true;
			}
		}
		return false;
	}
}