<?php

/**
 * The admin-specific functionality of the plugin
 *
 * @link       #
 * @since      1.0.0
 *
 * @package    Abfw
 * @subpackage Abfw/Admin
 */

namespace AdvancedBooking\Admin;

use AdvancedBooking\Booking\Repository;
use AdvancedBooking\Booking\Statuses;
use AdvancedBooking\Order\Bookings;
use AdvancedBooking\Settings;

/**
 * Defines the plugin name, version, and the hooks for the admin area.
 *
 * @since      1.0.0
 * @package    Abfw
 * @subpackage Abfw/Admin
 */
class Admin {

	/**
	 * Menu slug shared by the plugin screens.
	 */
	const PAGE_SLUG = 'abogo_booking';

	/**
	 * Slug of the settings screen.
	 */
	const SETTINGS_SLUG = 'abogo_booking_settings';

	/**
	 * Slug of the tools screen.
	 */
	const TOOLS_SLUG = 'abogo_booking_tools';

	/**
	 * The ID of this plugin.
	 *
	 * @since    1.0.0
	 * @access   private
	 * @var      string    $plugin_name    The ID of this plugin.
	 */
	private $plugin_name;

	/**
	 * The version of this plugin.
	 *
	 * @since    1.0.0
	 * @access   private
	 * @var      string    $version    The current version of this plugin.
	 */
	private $version;

	/**
	 * Initialize the class and set its properties.
	 *
	 * @since    1.0.0
	 * @param    string $plugin_name The name of this plugin.
	 * @param    string $version     The version of this plugin.
	 */
	public function __construct( $plugin_name, $version ) {
		$this->plugin_name = $plugin_name;
		$this->version     = $version;
	}

	/**
	 * Register the stylesheets for the admin area.
	 *
	 * @since 1.0.0
	 */
	public function enqueue_styles() {
		wp_enqueue_style(
			$this->plugin_name,
			ABFW_URL . 'src/Admin/css/admin.css',
			array(),
			$this->asset_version( 'src/Admin/css/admin.css' )
		);
	}

	/**
	 * Register the scripts for the admin area.
	 *
	 * @since 1.0.0
	 */
	public function enqueue_scripts() {
		wp_enqueue_script(
			$this->plugin_name,
			ABFW_URL . 'src/Admin/js/admin.js',
			array( 'jquery' ),
			$this->asset_version( 'src/Admin/js/admin.js' ),
			true
		);

		wp_localize_script( $this->plugin_name, 'abfwAdmin', $this->preview_strings() );
	}

	/**
	 * Add the plugin entries to the admin menu.
	 *
	 * @since 1.0.0
	 */
	public function add_admin_menu() {
		add_menu_page(
			__( 'Bookings', 'abogo-booking' ),
			__( 'Bookings', 'abogo-booking' ),
			'manage_woocommerce',
			self::PAGE_SLUG,
			array( $this, 'render_bookings_page' ),
			'dashicons-calendar-alt',
			56
		);

		add_submenu_page(
			self::PAGE_SLUG,
			__( 'Bookings', 'abogo-booking' ),
			__( 'Bookings', 'abogo-booking' ),
			'manage_woocommerce',
			self::PAGE_SLUG,
			array( $this, 'render_bookings_page' )
		);

		add_submenu_page(
			self::PAGE_SLUG,
			__( 'Settings', 'abogo-booking' ),
			__( 'Settings', 'abogo-booking' ),
			'manage_woocommerce',
			self::SETTINGS_SLUG,
			array( $this, 'render_settings_page' )
		);

		add_submenu_page(
			self::PAGE_SLUG,
			__( 'Tools', 'abogo-booking' ),
			__( 'Tools', 'abogo-booking' ),
			'manage_woocommerce',
			self::TOOLS_SLUG,
			array( $this, 'render_tools_page' )
		);
	}

	/**
	 * Render the list of bookings.
	 *
	 * @since 1.0.0
	 */
	public function render_bookings_page() {
		$moved = $this->maybe_move_booking();
		$views = array(
			'list'     => __( 'List', 'abogo-booking' ),
			'calendar' => __( 'Calendar', 'abogo-booking' ),
		);

		// phpcs:disable WordPress.Security.NonceVerification.Recommended
		$status    = isset( $_GET['status'] ) ? sanitize_text_field( wp_unslash( $_GET['status'] ) ) : '';
		$page      = isset( $_GET['paged'] ) ? max( 1, (int) $_GET['paged'] ) : 1;
		$view      = isset( $_GET['view'] ) ? sanitize_key( wp_unslash( $_GET['view'] ) ) : 'list';
		$month     =isset( $_GET['month'] ) ? sanitize_text_field( wp_unslash( $_GET['month'] ) ) : '';
		$arrival   = isset( $_GET['arrival'] ) ? sanitize_text_field( wp_unslash( $_GET['arrival'] ) ) : '';
		$departure = isset( $_GET['departure'] ) ? sanitize_text_field( wp_unslash( $_GET['departure'] ) ) : '';
		// phpcs:enable WordPress.Security.NonceVerification.Recommended

		$view = isset( $views[ $view ] ) ? $view : 'list';

		if ( 'calendar' === $view ) {
			$this->render_bookings_calendar( $views, $view, $month, $moved );

			return;
		}

		$per_page = 20;

		/**
		 * What the list of bookings is narrowed to.
		 *
		 * @since 1.1.0
		 * @param array $filters Filters: status, start, end, and product_id when one is added.
		 */
		$filters = apply_filters(
			'abfw_bookings_filters',
			array(
				'status' => $status,
				'start'  => $arrival,
				'end'    => $departure,
			)
		);
		$bookings = Repository::query(
			$filters + array(
				'page'     => $page,
				'per_page' => $per_page,
			)
		);
		$total    = Repository::count( $filters );

		/** This action is documented in src/Admin/Admin.php */
		do_action( 'abfw_bookings_shown', $bookings );

		include ABFW_PATH . 'src/Admin/views/bookings.php';
	}

	/**
	 * Render the tools page, running the repair or saving the uninstall choice first.
	 *
	 * @since 1.0.0
	 */
	public function render_tools_page() {
		$rebuilt     = $this->maybe_rebuild();
		$saved       = $this->maybe_save_settings();
		$remove_data = Settings::get( 'remove_data' );

		include ABFW_PATH . 'src/Admin/views/tools.php';
	}

	/**
	 * Render the settings screen, saving it first when it was just submitted.
	 *
	 * @since 1.0.0
	 */
	public function render_settings_page() {
		$saved = $this->maybe_save_settings();
		$rules = Settings::all();

		/**
		 * The tabs of the settings screen.
		 *
		 * @since 1.1.0
		 * @param array $tabs Title of each tab, by key.
		 */
		$tabs = apply_filters(
			'abfw_settings_tabs',
			array(
				'general'  => __( 'General', 'abogo-booking' ),
				'calendar' => __( 'Calendar', 'abogo-booking' ),
				'life'     => __( 'Booking life', 'abogo-booking' ),
			)
		);

		/**
		 * Tabs shown locked, with what each would offer, while the paid version is not active.
		 *
		 * @since 1.1.0
		 * @param array $locked Title and features of each locked tab, by key.
		 */
		$locked = apply_filters( 'abfw_locked_tabs', array() );
		$tabs  += wp_list_pluck( $locked, 'title' );

		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
		$tab = isset( $_GET['tab'] ) ? sanitize_key( wp_unslash( $_GET['tab'] ) ) : 'general';
		$tab = isset( $tabs[ $tab ] ) ? $tab : 'general';

		include ABFW_PATH . 'src/Admin/views/settings.php';
	}

	/**
	 * Show a month of bookings, day by day.
	 *
	 * @since 1.0.0
	 * @param array  $views Views of the screen.
	 * @param string $view  View being shown.
	 * @param string $month Month asked for, as a year and a month.
	 * @param bool|\WP_Error $moved Whether a booking was just moved by hand, or why it could not be.
	 */
	private function render_bookings_calendar( $views, $view, $month, $moved ) {
		$first = $this->first_of_month( $month );
		$last  = $first->modify( 'last day of this month' );
		$days  = array();

		$bookings = Repository::between( $first->format( 'Y-m-d' ), $last->format( 'Y-m-d' ) );

		/**
		 * The bookings a screen is about to show, so what goes with them can be read at once.
		 *
		 * @since 1.1.0
		 * @param array $bookings Booking rows.
		 */
		do_action( 'abfw_bookings_shown', $bookings );

		foreach ( $bookings as $booking ) {
			$day = new \DateTimeImmutable( $booking->start_date, wp_timezone() );
			$end = new \DateTimeImmutable( $booking->end_date, wp_timezone() );

			while ( $day <= $end ) {
				$key = $day->format( 'Y-m-d' );

				if ( $day >= $first && $day <= $last ) {
					$days[ $key ][] = $booking;
				}

				$day = $day->modify( '+1 day' );
			}
		}

		include ABFW_PATH . 'src/Admin/views/bookings-calendar.php';
	}

	/**
	 * The first day of the month being shown, today's month by default.
	 *
	 * @since 1.0.0
	 * @param string $month Month asked for, as a year and a month.
	 * @return \DateTimeImmutable
	 */
	private function first_of_month( $month ) {
		$asked = preg_match( '/^\d{4}-\d{2}$/', $month )
			? \DateTimeImmutable::createFromFormat( '!Y-m-d', $month . '-01', wp_timezone() )
			: false;

		return $asked ? $asked : new \DateTimeImmutable( 'midnight first day of this month', wp_timezone() );
	}

	/**
	 * Rebuild the missing bookings when the tools page was submitted.
	 *
	 * @since 1.0.0
	 * @return int|null How many bookings were written, null when nothing ran.
	 */
	private function maybe_rebuild() {
		if ( ! isset( $_POST['abfw_rebuild_nonce'] ) || ! current_user_can( 'manage_woocommerce' ) ) {
			return null;
		}

		if ( ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_POST['abfw_rebuild_nonce'] ) ), 'abfw_rebuild' ) ) {
			return null;
		}

		return ( new Bookings() )->rebuild();
	}

	/**
	 * Version stamp of an asset, so a changed file is never served from a cache.
	 *
	 * @since 1.0.0
	 * @param string $relative Path inside the plugin.
	 * @return string
	 */
	private function asset_version( $relative ) {
		$file = ABFW_PATH . $relative;

		return file_exists( $file ) ? (string) filemtime( $file ) : $this->version;
	}

	/**
	 * Words the preview beside the settings needs.
	 *
	 * @since 1.0.0
	 * @return array
	 */
	private function preview_strings() {
		return array(
			// The preview keeps showing the whole policy, even on a tab that carries
			// only part of it.
			'rules'          => Settings::all(),
			'currency'       => sprintf( get_woocommerce_price_format(), get_woocommerce_currency_symbol(), '%s' ),
			'decimals'       => wc_get_price_decimals(),
			'night'          => __( 'night', 'abogo-booking' ),
			'nights'         => __( 'nights', 'abogo-booking' ),
			'day'            => __( 'day', 'abogo-booking' ),
			'days'           => __( 'days', 'abogo-booking' ),
			'per'            => __( 'per', 'abogo-booking' ),
			'arrival'        => __( 'Arrival', 'abogo-booking' ),
			'date'           => __( 'Date', 'abogo-booking' ),
			'to'             => __( 'to', 'abogo-booking' ),
			'atLeast'        => __( 'at least', 'abogo-booking' ),
			'today'          => __( 'today', 'abogo-booking' ),
			'tomorrow'       => __( 'tomorrow', 'abogo-booking' ),
			/* translators: %s: number of days. */
			'inDays'         => __( 'in %s days', 'abogo-booking' ),
			'twoDates'       => __( 'two dates', 'abogo-booking' ),
			'oneDate'        => __( 'one date', 'abogo-booking' ),
			'brokenLength'   => __( 'a length that needs fixing', 'abogo-booking' ),
			/* translators: 1: dates to choose, 2: night or day, 3: length allowed, 4: first date, 5: number of days. */
			'recap'          => __( 'Guests pick %1$s and pay per %2$s. They stay %3$s, arriving from %4$s up to %5$s ahead.', 'abogo-booking' ),
			'stepBooked'     => __( 'Booked', 'abogo-booking' ),
			'stepArriving'   => __( 'Arriving', 'abogo-booking' ),
			'stepOut'        => __( 'Out now', 'abogo-booking' ),
			'stepBack'       => __( 'Just back', 'abogo-booking' ),
			'stepCompleted'  => __( 'Completed', 'abogo-booking' ),
			'whenPaid'       => __( 'as soon as the order is paid', 'abogo-booking' ),
			/* translators: %s: a length such as "2 days". */
			'beforeArrival'  => __( 'moves on its own, %s before', 'abogo-booking' ),
			'onArrival'      => __( 'moves on its own, on the arrival day', 'abogo-booking' ),
			/* translators: %s: a length such as "2 days". */
			'afterDeparture' => __( 'moves on its own, for %s', 'abogo-booking' ),
			'nothingLeft'    => __( 'moves on its own', 'abogo-booking' ),
			'waitsForYou'    => __( 'waits for you', 'abogo-booking' ),
		);
	}

	/**
	 * Move one booking when the list was submitted by someone allowed to.
	 *
	 * @since 1.0.0
	 * @return bool|\WP_Error Whether a booking moved, or why it could not.
	 */
	private function maybe_move_booking() {
		if ( ! isset( $_POST['abfw_move_nonce'] ) || ! current_user_can( 'manage_woocommerce' ) ) {
			return false;
		}

		if ( ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_POST['abfw_move_nonce'] ) ), 'abfw_move_booking' ) ) {
			return false;
		}

		$booking_id = isset( $_POST['booking_id'] ) ? (int) $_POST['booking_id'] : 0;
		$status     = isset( $_POST['booking_status'] ) ? sanitize_text_field( wp_unslash( $_POST['booking_status'] ) ) : '';

		if ( ! $booking_id || ! Statuses::exists( $status ) ) {
			return false;
		}

		/**
		 * Whether a booking may be moved to a status by hand: true, or the reason it cannot.
		 *
		 * @since 1.1.0
		 * @param true|\WP_Error $allowed True so far.
		 * @param object|null    $booking Booking being moved.
		 * @param string         $status  Status asked for.
		 */
		$allowed = apply_filters( 'abfw_move_booking', true, Repository::find( $booking_id ), $status );

		if ( is_wp_error( $allowed ) ) {
			return $allowed;
		}

		return Repository::update_status( $booking_id, $status );
	}

	/**
	 * Store the settings when the screen was submitted by someone allowed to.
	 *
	 * @since 1.0.0
	 * @return bool Whether anything was saved.
	 */
	private function maybe_save_settings() {
		if ( ! isset( $_POST['abfw_settings_nonce'] ) || ! current_user_can( 'manage_woocommerce' ) ) {
			return false;
		}

		if ( ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_POST['abfw_settings_nonce'] ) ), 'abfw_save_settings' ) ) {
			return false;
		}

		$group  = isset( $_POST['abfw_tab'] ) ? sanitize_key( wp_unslash( $_POST['abfw_tab'] ) ) : 'general';
		$posted = array();

		foreach ( array_keys( Settings::defaults() ) as $key ) {
			if ( isset( $_POST[ $key ] ) ) {
				// A rule may hold a list, such as the closed dates.
				$posted[ $key ] = map_deep( wp_unslash( $_POST[ $key ] ), 'sanitize_text_field' );
			}
		}

		Settings::save_group( $group, $posted );

		return true;
	}
}