<?php
/**
 * Stock Central page
 *
 * @package         Atum
 * @subpackage      StockCentral
 * @author          Be Rebel - https://berebel.io
 * @copyright       ©2019 Stock Management Labs™
 *
 * @since           0.0.1
 */

namespace Atum\StockCentral;

defined( 'ABSPATH' ) || die;

use Atum\Components\AtumListTables\AtumListPage;
use Atum\Components\AtumHelpPointers;
use Atum\Inc\Globals;
use Atum\Inc\Helpers;
use Atum\Settings\Settings;


class StockCentral extends AtumListPage {
	
	/**
	 * The singleton instance holder
	 *
	 * @var StockCentral
	 */
	private static $instance;

	/**
	 * The ATUM Stock Central admin page slug
	 */
	const UI_SLUG = 'atum-stock-central';

	/**
	 * The menu order for this module
	 */
	const MENU_ORDER = 2;
	
	/**
	 * StockCentral singleton constructor
	 *
	 * @since 0.0.1
	 */
	private function __construct() {

		// Add the module menu.
		add_filter( 'atum/admin/menu_items', array( $this, 'add_menu' ), self::MENU_ORDER );

		if ( is_admin() ) {

			$user_option    = get_user_meta( get_current_user_id(), ATUM_PREFIX . 'stock_central_products_per_page', TRUE );
			$this->per_page = $user_option ?: Helpers::get_option( 'posts_per_page', Settings::DEFAULT_POSTS_PER_PAGE );

			// Initialize on admin page load.
			add_action( 'load-' . Globals::ATUM_UI_HOOK . '_page_' . self::UI_SLUG, array( $this, 'screen_options' ) );
			add_action( 'load-toplevel_page_' . self::UI_SLUG, array( $this, 'screen_options' ) );

			// Add the Stock Central settings.
			add_filter( 'atum/settings/tabs', array( $this, 'add_settings_tab' ) );
			add_filter( 'atum/settings/defaults', array( $this, 'add_settings_defaults' ) );

			// Register the help pointers.
			add_action( 'admin_enqueue_scripts', array( $this, 'setup_help_pointers' ) );

			parent::init_hooks();

		}
		
	}

	/**
	 * Add the Stock Central menu
	 *
	 * @since 1.3.6
	 *
	 * @param array $menus
	 *
	 * @return array
	 */
	public function add_menu( $menus ) {

		$menus['stock-central'] = array(
			'title'      => __( 'Stock Central', ATUM_TEXT_DOMAIN ),
			'callback'   => array( $this, 'display' ),
			'slug'       => self::UI_SLUG,
			'menu_order' => self::MENU_ORDER,
		);

		return $menus;

	}
	
	/**
	 * Display the Stock Central admin page
	 *
	 * @since 0.0.1
	 */
	public function display() {
		
		parent::display();

		$sc_url = add_query_arg( 'page', self::UI_SLUG, admin_url( 'admin.php' ) );

		if ( ! $this->is_uncontrolled_list ) {
			$sc_url = add_query_arg( 'uncontrolled', 1, $sc_url );
		}

		Helpers::load_view( 'stock-central', array(
			'list'                 => $this->list,
			'ajax'                 => Helpers::get_option( 'enable_ajax_filter', 'yes' ),
			'is_uncontrolled_list' => $this->is_uncontrolled_list,
			'sc_url'               => $sc_url,
		) );
		
	}
	
	/**
	 * Enable Screen options creating the list table before the Screen option panel is rendered and enable
	 * "per page" option. Also add help tabs and help sidebar
	 *
	 * @since 0.0.2
	 */
	public function screen_options() {

		// Add "Products per page" to screen options tab.
		add_screen_option( 'per_page', array(
			'label'   => __( 'Products per page', ATUM_TEXT_DOMAIN ),
			'default' => $this->per_page,
			'option'  => ATUM_PREFIX . 'stock_central_products_per_page',
		) );
		
		$help_tabs = array(
			array(
				'name'  => 'general',
				'title' => __( 'General', ATUM_TEXT_DOMAIN ),
			),
			array(
				'name'  => 'product-details',
				'title' => __( 'Product Details', ATUM_TEXT_DOMAIN ),
			),
			array(
				'name'  => 'stock-counters',
				'title' => __( 'Stock Counters', ATUM_TEXT_DOMAIN ),
			),
			array(
				'name'  => 'stock-negatives',
				'title' => __( 'Stock Negatives', ATUM_TEXT_DOMAIN ),
			),
			array(
				'name'  => 'stock-selling-manager',
				'title' => __( 'Stock Selling Manager', ATUM_TEXT_DOMAIN ),
			),
		);
		
		$screen = get_current_screen();
		
		foreach ( $help_tabs as $help_tab ) {

			$screen->add_help_tab( array_merge( array(
				'id'       => ATUM_PREFIX . __CLASS__ . '_help_tabs_' . $help_tab['name'],
				'callback' => array( $this, 'help_tabs_content' ),
			), $help_tab ) );

		}
		
		$screen->set_help_sidebar( Helpers::load_view_to_string( 'help-tabs/help-sidebar' ) );

		// phpcs:ignore WordPress.PHP.StrictComparisons.LooseComparison
		if ( isset( $_GET['uncontrolled'] ) && 1 === absint( $_GET['uncontrolled'] ) ) {
			$this->is_uncontrolled_list = TRUE;
		}

		$namespace  = __NAMESPACE__ . '\Lists';
		$list_class = $this->is_uncontrolled_list ? "$namespace\UncontrolledListTable" : "$namespace\ListTable";
		$this->list = new $list_class( [
			'per_page'        => $this->per_page,
			'show_cb'         => TRUE,
			'show_controlled' => ! $this->is_uncontrolled_list,
		] );
		
	}

	/**
	 * Display the help tabs' content
	 *
	 * @since 0.0.2
	 *
	 * @param \WP_Screen $screen    The current screen.
	 * @param array      $tab       The current help tab.
	 */
	public function help_tabs_content( $screen, $tab ) {
		
		Helpers::load_view( 'help-tabs/stock-central/' . $tab['name'] );
	}

	/**
	 * Add a new tab to the ATUM settings page
	 *
	 * @since 1.3.6
	 *
	 * @param array $tabs
	 *
	 * @return array
	 */
	public function add_settings_tab( $tabs ) {

		$tabs['stock_central'] = array(
			'tab_name' => __( 'Stock Central', ATUM_TEXT_DOMAIN ),
			'icon'     => 'atmi-layers',
			'sections' => array(
				'stock_central' => __( 'Stock Central Options', ATUM_TEXT_DOMAIN ),
			),
		);

		return $tabs;
	}

	/**
	 * Add fields to the ATUM settings page
	 *
	 * @since 1.3.6
	 *
	 * @param array $defaults
	 *
	 * @return array
	 */
	public function add_settings_defaults( $defaults ) {

		$defaults['posts_per_page'] = array(
			'section' => 'stock_central',
			'name'    => __( 'Products per Page', ATUM_TEXT_DOMAIN ),
			'desc'    => __( "Controls the number of products displayed per page within the Stock Central screen. Please note, you can set this value within the 'Screen Options' tab as well. Enter '-1' to remove the pagination and display all available products on one page (not recommended if your store contains a large number of products as it may affect the performance).", ATUM_TEXT_DOMAIN ),
			'type'    => 'number',
			'default' => Settings::DEFAULT_POSTS_PER_PAGE,
			'options' => array(
				'min' => 1,
				'max' => 500,
			),
		);

		$defaults['sale_days'] = array(
			'section' => 'stock_central',
			'name'    => __( 'Days to Re-Order', ATUM_TEXT_DOMAIN ),
			'desc'    => __( "This value sets the number of days a user needs to replenish the stock levels. It controls the 'Low Stock' indicator within the 'Stock Central' page.", ATUM_TEXT_DOMAIN ),
			'type'    => 'number',
			'default' => Settings::DEFAULT_SALE_DAYS,
			'options' => array(
				'min' => 1,
				'max' => 365,
			),
		);

		$defaults['expandable_rows'] = array(
			'section' => 'stock_central',
			'name'    => __( 'Expandable Rows', ATUM_TEXT_DOMAIN ),
			'desc'    => __( 'Show variable and grouped products expanded (ON) or collapsed (OFF) by default.', ATUM_TEXT_DOMAIN ),
			'type'    => 'switcher',
			'default' => 'no',
		);

		// WC Subscriptions compatibility.
		if ( class_exists( '\WC_Subscriptions' ) ) {

			$defaults['show_subscriptions'] = array(
				'section' => 'stock_central',
				'name'    => __( 'Show WC Subscriptions', ATUM_TEXT_DOMAIN ),
				'desc'    => __( "When enabled, ATUM will show the WC Subscriptions's products in Stock Central.", ATUM_TEXT_DOMAIN ),
				'type'    => 'switcher',
				'default' => 'yes',
			);

		}

		// WC Bookings compatibility.
		if ( class_exists( '\WC_Bookings' ) ) {

			$defaults['show_bookable_products'] = array(
				'section' => 'stock_central',
				'name'    => __( 'Show Bookable Products', ATUM_TEXT_DOMAIN ),
				'desc'    => __( 'When enabled, ATUM will show the Bookable products from WC Bookings add-on in Stock Central.', ATUM_TEXT_DOMAIN ),
				'type'    => 'switcher',
				'default' => 'yes',
			);

		}

		// WC Bundles compatibility.
		if ( class_exists( '\WC_Bundles' ) ) {

			$defaults['show_bundles'] = array(
				'section' => 'stock_central',
				'name'    => __( 'Show WC Product Bundles', ATUM_TEXT_DOMAIN ),
				'desc'    => __( "When enabled, ATUM will show the WC Product Bundles' products in Stock Central.", ATUM_TEXT_DOMAIN ),
				'type'    => 'switcher',
				'default' => 'yes',
			);

		}

		return $defaults;

	}

	/**
	 * Setup help pointers for some Atum screens
	 *
	 * @since 1.4.10
	 */
	public function setup_help_pointers() {

		$screen_id = Globals::ATUM_UI_HOOK . '_page_' . self::UI_SLUG;

		$pointers = array(
			array(
				'id'             => self::UI_SLUG . '-screen-tab',  // Unique id for this pointer.
				'screen'         => $screen_id,                     // This is the page hook we want our pointer to show on.
				'target'         => '#screen-options-link-wrap',    // The css selector for the pointer to be tied to, best to use ID's.
				'next'           => '#contextual-help-link-wrap',   // The help tip that will be displayed next.
				'title'          => __( 'ATUM Stock Central Screen Options', ATUM_TEXT_DOMAIN ),
				'content'        => __( "Click the 'Screen Options' tab to add/hide/show columns within the Stock Central view.", ATUM_TEXT_DOMAIN ),
				'position'       => array(
					'edge'  => 'top',                               // Top, bottom, left, right.
					'align' => 'left',                              // Top, bottom, left, right, middle.
				),
				'arrow_position' => array(
					'right' => '32px',
				),
			),
			array(
				'id'             => self::UI_SLUG . '-help-tab',
				'screen'         => $screen_id,
				'target'         => '#contextual-help-link-wrap',
				'title'          => __( 'ATUM Quick Help', ATUM_TEXT_DOMAIN ),
				'content'        => __( "Click the 'Help' tab to learn more about the ATUM's Stock Central.", ATUM_TEXT_DOMAIN ),
				'position'       => array(
					'edge'  => 'top',
					'align' => 'right',
				),
				'arrow_position' => array(
					'left' => '84%',
				),
			),
		);

		// Instantiate the class and pass our pointers array to the constructor.
		new AtumHelpPointers( $pointers );

	}

	
	/********************
	 * Instance methods
	 ********************/

	/**
	 * Cannot be cloned
	 */
	public function __clone() {
		_doing_it_wrong( __FUNCTION__, esc_attr__( 'Cheatin&#8217; huh?', ATUM_TEXT_DOMAIN ), '1.0.0' );
	}

	/**
	 * Cannot be serialized
	 */
	public function __sleep() {
		_doing_it_wrong( __FUNCTION__, esc_attr__( 'Cheatin&#8217; huh?', ATUM_TEXT_DOMAIN ), '1.0.0' );
	}
	
	/**
	 * Get Singleton instance
	 *
	 * @return StockCentral instance
	 */
	public static function get_instance() {
		
		if ( ! ( self::$instance && is_a( self::$instance, __CLASS__ ) ) ) {
			self::$instance = new self();
		}
		
		return self::$instance;
	}
	
}