<?php
if ( ! defined( 'ABSPATH' ) ) {
	die( 'You are not allowed to call this page directly.' );
}

/**
 * @since 5.3
 */
class FrmApplicationsController {

	/**
	 * Add Applications menu item to sidebar and define Applications index page.
	 *
	 * @return void
	 */
	public static function menu() {
		$label = __( 'Applications', 'formidable' );
		$cap   = self::get_required_capability();

		if ( ! current_user_can( $cap ) && is_callable( 'FrmProApplicationsHelper::get_custom_applications_capability' ) ) {
			$custom_applications_cap = FrmProApplicationsHelper::get_custom_applications_capability();
			if ( current_user_can( $custom_applications_cap ) ) {
				$cap      = $custom_applications_cap;
				$slug     = 'edit-tags.php?taxonomy=frm_application';
				$callback = '';
			}
		}

		if ( ! isset( $slug ) ) {
			$slug     = 'formidable-applications';
			$callback = array( __CLASS__, 'landing_page' );
		}

		add_submenu_page( 'formidable', 'Formidable | ' . $label, $label, $cap, $slug, $callback );
	}

	/**
	 * Get the required capability for accessing the Applications dashboard.
	 *
	 * @since 5.3.1
	 *
	 * @return string
	 */
	private static function get_required_capability() {
		if ( is_callable( 'FrmProApplicationsHelper::get_required_templates_capability' ) ) {
			return FrmProApplicationsHelper::get_required_templates_capability();
		}
		return 'frm_edit_forms';
	}

	/**
	 * Render Applications index page.
	 *
	 * @return void
	 */
	public static function landing_page() {
		require self::get_view_path() . 'index.php';
	}

	/**
	 * Get path to application views.
	 *
	 * @return string
	 */
	private static function get_view_path() {
		return FrmAppHelper::plugin_path() . '/classes/views/applications/';
	}

	/**
	 * Get information about applications via AJAX action.
	 *
	 * @return void
	 */
	public static function get_applications_data() {
		FrmAppHelper::permission_check( 'frm_view_forms' );
		check_ajax_referer( 'frm_ajax', 'nonce' );

		$view = FrmAppHelper::get_param( 'view', '', 'get', 'sanitize_text_field' );
		$data = array();

		if ( 'applications' !== $view ) {
			FrmAppHelper::permission_check( self::get_required_capability() );

			// view may be 'applications', 'templates', or empty.
			$data['templates']  = self::get_prepared_template_data();
			$data['categories'] = FrmApplicationTemplate::get_categories();
		} else {
			FrmAppHelper::permission_check( 'frm_edit_applications' );
		}

		/**
		 * @param array $data
		 */
		$data = apply_filters( 'frm_applications_data', $data );

		wp_send_json_success( $data );
	}

	/**
	 * Retrieve API data and return a reduced set back with some restructuring applied to make it easier to read.
	 *
	 * @return array<array>
	 */
	private static function get_prepared_template_data() {
		$api          = new FrmApplicationApi();
		$applications = $api->get_api_info();
		$applications = array_filter( $applications, 'is_array' );

		$unlocked_templates = array();
		$locked_templates   = array();
		foreach ( $applications as $key => $application ) {
			if ( ! is_numeric( $key ) ) {
				// Skip "error" or any other non-numeric key.
				continue;
			}

			if ( ! empty( $application['url'] ) ) {
				$unlocked_templates[] = $application;
			} else {
				$locked_templates[] = $application;
			}
		}

		$unlocked_templates = self::sort_templates( $unlocked_templates );

		$applications = $unlocked_templates;
		if ( current_user_can( 'administrator' ) || current_user_can( 'frm_change_settings' ) ) {
			$locked_templates = self::sort_templates( $locked_templates );
			$applications     = array_merge( $applications, $locked_templates );
		}

		FrmApplicationTemplate::init();

		return array_reduce( $applications, array( __CLASS__, 'reduce_template' ), array() );
	}

	/**
	 * @param array $total the accumulated array of reduced application data.
	 * @param array $current data for the current template from the API.
	 * @return array<array>
	 */
	private static function reduce_template( $total, $current ) {
		$template = new FrmApplicationTemplate( $current );
		$total[]  = $template->as_js_object();
		return $total;
	}

	/**
	 * Sort applications alphabetically.
	 *
	 * @param array<array> $applications
	 * @return array<array>
	 */
	private static function sort_templates( $applications ) {
		usort(
			$applications,
			function( $a, $b ) {
				return strcmp( $a['name'], $b['name'] );
			}
		);
		return $applications;
	}

	/**
	 * @return void
	 */
	public static function load_assets() {
		$plugin_url = FrmAppHelper::plugin_url();
		$version    = FrmAppHelper::plugin_version();

		wp_enqueue_style( 'formidable-admin' );
		wp_enqueue_style( 'formidable-grids' );

		$js_dependencies = array(
			'wp-i18n',
			'wp-hooks', // This prevents a console error "wp.hooks is undefined" in WP versions older than 5.7.
			'formidable_dom',
		);
		wp_register_script( 'formidable_applications', $plugin_url . '/js/admin/applications.js', $js_dependencies, $version, true );
		wp_register_style( 'formidable_applications', $plugin_url . '/css/admin/applications.css', array(), $version );

		$js_vars = array(
			'proUpgradeUrl' => FrmAppHelper::admin_upgrade_link( 'applications' ),
		);
		wp_localize_script( 'formidable_applications', 'frmApplicationsVars', $js_vars );

		wp_enqueue_script( 'formidable_applications' );
		wp_enqueue_style( 'formidable_applications' );

		do_action( 'frm_applications_assets' );
	}

	/**
	 * @return void
	 */
	public static function dequeue_scripts() {
		if ( 'formidable-applications' === FrmAppHelper::simple_get( 'page', 'sanitize_title' ) ) {
			// Avoid extra scripts loading on applications index that aren't needed.
			wp_dequeue_script( 'frm-surveys-admin' );
			wp_dequeue_script( 'frm-quizzes-form-action' );
		}
	}

	/**
	 * @param string $title
	 * @param string $context values include 'index', 'list', and 'edit'.
	 * @return void
	 */
	public static function render_applications_header( $title, $context ) {
		FrmAppHelper::print_admin_banner( true );
		require self::get_view_path() . 'header.php';
	}
}
