<?php

/**
 * Class LP_Setup_Wizard
 *
 * Class helper for displaying the Setup Wizard page.
 *
 * @since   3.0.0
 * @author  ThimPress
 * @package LearnPress/Classes
 */
class LP_Setup_Wizard {
	/**
	 * @var string
	 */
	protected $_base_url = 'index.php?page=lp-setup';

	/**
	 * LP_Setup_Wizard constructor.
	 */
	protected function __construct() {
		add_action( 'admin_menu', array( $this, 'admin_menu' ) );
		add_action( 'admin_init', array( $this, 'setup_wizard' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'scripts' ) );
	}

	/**
	 * Create page by type.
	 *
	 * @param string $page
	 *
	 * @return int|WP_Error
	 */
	public function create_page( $page ) {
		$page_titles = array(
			'courses_page_id'           => _x( 'LP Courses', 'static-page', 'learnpress' ),
			'profile_page_id'           => _x( 'LP Profile', 'static-page', 'learnpress' ),
			'checkout_page_id'          => _x( 'LP Checkout', 'static-page', 'learnpress' ),
			'become_a_teacher_page_id'  => _x( 'LP Become a Teacher', 'static-page', 'learnpress' ),
			'term_conditions_page_id'   => _x( 'LP Terms and Conditions', 'static-page', 'learnpress' ),
			'instructors_page_id'       => _x( 'Instructors', 'static-page', 'learnpress' ),
			'single_instructor_page_id' => _x( 'Instructor', 'static-page', 'learnpress' ),
		);

		if ( $page === 'profile_page_id' ) {
			$page_content = '<!-- wp:shortcode -->[learn_press_profile]<!-- /wp:shortcode -->';
		} else {
			$page_content = '';
		}

		return wp_insert_post(
			array(
				'post_title'   => $page_titles[ $page ] ?? $page,
				'post_status'  => 'publish',
				'post_type'    => 'page',
				'post_content' => $page_content,
			)
		);
	}

	/**
	 * Add an empty menu item for validating page.
	 */
	public function admin_menu() {
		if ( 'lp-setup' !== LP_Request::get_param( 'page' )
			|| ! current_user_can( 'install_plugins' ) ) {
			return;
		}

		add_dashboard_page( '', '', 'manage_options', 'lp-setup', '' );
	}

	/**
	 * Display setup page a ignore anything else in the rest
	 */
	public function setup_wizard() {
		if ( 'lp-setup' !== LP_Request::get_param( 'page' )
			|| ! current_user_can( 'install_plugins' ) ) {
			return;
		}

		learn_press_admin_view( 'setup/header' );
		learn_press_admin_view( 'setup/content', array( 'steps' => $this->get_steps() ) );
		learn_press_admin_view( 'setup/footer' );

		die();
	}

	/**
	 * Return array of all steps are available when running setup wizard.
	 *
	 * @return array
	 */
	public function get_steps() {
		static $steps;
		if ( is_null( $steps ) ) {
			$steps = apply_filters(
				'learn-press/setup-wizard/steps',
				array(
					'welcome' => array(
						'title'       => __( 'Welcome', 'learnpress' ),
						'callback'    => array( $this, 'step_welcome' ),
						'next_button' => __( 'Get Started', 'learnpress' ),
					),
					'learning-experience' => array(
						'title'    => __( 'Learning Experience', 'learnpress' ),
						'callback' => array( $this, 'step_learning_experience' ),
					),
					'pages'   => array(
						'title'    => __( 'Pages', 'learnpress' ),
						'callback' => array( $this, 'step_pages' ),
					),
					'payment' => array(
						'title'    => __( 'Payment & Currency', 'learnpress' ),
						'callback' => array( $this, 'step_payment' ),
					),
					'emails'  => array(
						'title'    => __( 'Emails', 'learnpress' ),
						'callback' => array( $this, 'step_emails' ),
					),
					'finish'  => array(
						'title'    => __( 'Finish', 'learnpress' ),
						'callback' => array( $this, 'step_finish' ),
					),
				)
			);
		}

		return $steps;
	}

	/**
	 * Get all keys of available steps.
	 *
	 * @return array
	 */
	public function get_step_keys() {
		return array_keys( $this->get_steps() );
	}

	/**
	 * Get key of current step.
	 *
	 * @param bool $key
	 *
	 * @return mixed|string
	 */
	public function get_current_step( $key = true ) {
		$current = LP_Request::get_param( 'step' );
		$steps   = $this->get_steps();

		if ( empty( $steps[ $current ] ) ) {
			$key_steps = array_keys( $steps );
			$current   = reset( $key_steps );
		}

		$step = $steps[ $current ];
		if ( empty( $step['slug'] ) ) {
			$step['slug'] = $current;
		}

		return $key ? $current : $step;
	}

	/**
	 * Return true if the first step is viewing.
	 *
	 * @return bool
	 */
	public function is_first_step() {
		$steps = $this->get_step_keys();

		return array_search( $this->get_current_step(), $steps ) === 0;
	}

	/**
	 * Return true if the last steo is viewing.
	 *
	 * @return bool
	 */
	public function is_last_step() {
		$steps = $this->get_step_keys();

		return array_search( $this->get_current_step(), $steps ) === sizeof( $steps ) - 1;
	}

	/**
	 * Get url of next step.
	 *
	 * @return string
	 */
	public function get_next_url() {
		$current = $this->get_current_step();
		$steps   = $this->get_step_keys();
		$at      = array_search( $current, $steps );
		if ( $at < sizeof( $steps ) - 1 ) {
			++$at;
		}

		return esc_url_raw( add_query_arg( 'step', $steps[ $at ], admin_url( $this->_base_url ) ) );
	}

	/**
	 * Get url of prev step.
	 *
	 * @return string
	 */
	public function get_prev_url() {
		$current = $this->get_current_step();
		$steps   = $this->get_step_keys();
		$at      = array_search( $current, $steps );
		if ( $at > 0 ) {
			--$at;
		}

		return esc_url_raw( add_query_arg( 'step', $steps[ $at ], admin_url( $this->_base_url ) ) );
	}

	/**
	 * Get position number of a step.
	 *
	 * @param string $step - Optional.
	 *
	 * @return mixed
	 */
	public function get_step_position( $step = '' ) {
		if ( ! $step ) {
			$step = $this->get_current_step();
		}

		$steps = $this->get_step_keys();

		return array_search( $step, $steps );
	}

	public function get_payments() {
		return array(
			'paypal' => array(
				'name'     => __( 'PayPal', 'learnpress' ),
				'icon'     => LearnPress::instance()->plugin_url( 'assets/images/paypal-logo-preview.png' ),
				'callback' => array( $this, 'setup_paypal' ),
			),
		);
	}

	public function setup_paypal() {
		learn_press_admin_view( 'setup/setup-paypal' );
	}

	public function setup_stripe() {
		learn_press_admin_view( 'setup/setup-stripe' );
	}

	/**
	 * Welcome step content.
	 */
	public function step_welcome() {
		learn_press_admin_view( 'setup/steps/welcome' );
	}

	/**
	 * Learning Experience step content.
	 */
	public function step_learning_experience() {
		learn_press_admin_view( 'setup/steps/learning-experience' );
	}

	/**
	 * Currency step content.
	 */
	public function step_currency() {
		learn_press_admin_view( 'setup/steps/currency' );
	}

	public function step_pages() {
		learn_press_admin_view( 'setup/steps/pages' );
	}

	public function step_payment() {
		learn_press_admin_view( 'setup/steps/payment' );
	}

	public function step_emails() {
		learn_press_admin_view( 'setup/steps/emails' );
	}

	public function step_finish() {
		learn_press_admin_view( 'setup/steps/finish' );
		update_option( 'learn_press_setup_wizard_completed', 'yes' );
	}

	public function scripts() {
	}

	/**
	 * Get singleton instance
	 *
	 * @return bool|LP_Setup_Wizard
	 */
	public static function instance() {
		static $instance;
		if ( is_null( $instance ) ) {
			$instance = new self();
		}

		return $instance;
	}
}

return LP_Setup_Wizard::instance();