<?php

class Appointments_Admin_Appointments_Page {

	public $page_id = '';

	private $filters = array(
		's' => false,
		'worker_id' => false,
		'service_id' => false,
		'type' => 'active',
		'status' => array( 'confirmed', 'paid' )
	);

	private $sorting = array(
		'orderby' => 'ID',
		'order' => 'DESC'
	);

	private $pagination_args = array(
		'per_page' => 50,
		'page' => 1
	);

	public function __construct() {
		$this->page_id = add_menu_page('Appointments', __('Appointments','appointments'), App_Roles::get_capability('manage_options', App_Roles::CTX_PAGE_APPOINTMENTS),  'appointments', array(&$this,'appointment_list'),'dashicons-clock');
		add_action( "admin_print_scripts-" . $this->page_id, array( &$this, 'admin_scripts' ) );
		add_action( 'load-' . $this->page_id, array( $this, 'on_load' ) );
		add_action( 'load-' . $this->page_id, array( $this, 'set_screen_options' ) );

		$this->maybe_reset_filters();
	}

	public function on_load() {

		$appointments = appointments();

		// Bulk status change
		if ( isset( $_REQUEST["bulk_status"] ) && $_REQUEST["app_new_status"] && isset( $_REQUEST["app"] ) && is_array( $_REQUEST["app"] ) ) {

			$result = 0;
			$new_status = $_REQUEST["app_new_status"];
			foreach ( $_REQUEST["app"] as $app_id ) {
				$result = $result + (int)appointments_update_appointment_status( absint( $app_id ), $new_status  );
			}

			if ( $result ) {

				$userdata = get_userdata( get_current_user_id() );
				add_action( 'admin_notices', array ( $this, 'updated' ) );
				do_action( 'app_bulk_status_change',  $_REQUEST["app"] );

				$appointments->log( sprintf( __('Status of Appointment(s) with id(s):%s changed to %s by user:%s', 'appointments' ),  implode( ', ', $_REQUEST["app"] ), $new_status, $userdata->user_login ) );
				appointments_clear_cache();
			}
		}

		// Delete removed app records
		if ( isset($_POST["delete_removed"]) && 'delete_removed' == $_POST["delete_removed"]
		     && isset( $_POST["app"] ) && is_array( $_POST["app"] ) ) {
			$result = 0;
			foreach ( $_POST["app"] as $app_id ) {
				$result = $result + appointments_delete_appointment( $app_id );
			}

			if ( $result ) {
				global $current_user;
				$userdata = get_userdata( $current_user->ID );
				add_action( 'admin_notices', array ( $this, 'deleted' ) );
				do_action( 'app_deleted',  $_POST["app"] );
				$appointments->log( sprintf( __('Appointment(s) with id(s):%s deleted by user:%s', 'appointments' ),  implode( ', ', $_POST["app"] ), $userdata->user_login ) );
			}
		}

	}

	public function set_screen_options() {
		$options = appointments_get_options();
		$default = 50;
		if ( isset( $options['records_per_page'] ) && absint( $options['records_per_page'] ) ) {
			$default = absint( $options['records_per_page'] );
		}

		add_screen_option( 'per_page', array( 'label' => __( 'Queue items per page', 'appointments' ), 'default' => $default, 'option' => 'appointments_records_per_page' ) );
	}

	public function save_screen_options( $status, $option, $value ) {
		if ( 'appointments_records_per_page' == $option ) {
			return absint( $value );
		}

		return $status;
	}

	private function maybe_reset_filters() {
		if ( isset( $_GET['filter_reset_action'] ) ) {
			$remove =  array(
				'app_service_id',
				'app_provider_id',
				'app_new_status',
				's',
				'order',
				'orderby'
			);
			$remove[] = 'filter_reset_action';
			wp_safe_redirect( remove_query_arg( $remove ) );
			exit;
		}
	}

	public function admin_scripts() {
		$appointments = appointments();
		$appointments->admin->admin_scripts();
		_appointments_enqueue_jquery_ui_datepicker();
		wp_enqueue_script( 'appointments-admin-appointments', appointments_plugin_url() . 'admin/js/admin-appointments-list.js', array( 'jquery' ), true );

		$date_format = $appointments->safe_date_format();
		wp_localize_script( 'appointments-admin-appointments', 'Appi18n', array(
			'deleteRecordsConfirm' => esc_js( __( 'Are you sure to delete the selected record(s)?', 'appointments' ) ),
			'unexpectedError' => esc_js( __('Unexpected error','appointments') ),
            'dateFormat' => $date_format
        ) );
	}

	public function get_types() {
		return apply_filters( 'appointments_list_types', array(
			'active' => __('Active appointments', 'appointments'),
			'pending' => __('Pending appointments', 'appointments'),
			'completed' => __('Completed appointments', 'appointments'),
			'reserved' => __('Reserved by GCal', 'appointments'),
			'removed' => __('Removed appointments', 'appointments')
		));
	}

	private function parse_sorting() {
		$defaults = array(
			'orderby' => 'ID',
			'order' => 'DESC'
		);

		if ( isset( $_GET['orderby'] ) && $_GET['orderby'] ) {
			$this->sorting['orderby'] = $_GET['orderby'];
		}
		if ( isset( $_GET['order'] ) && $_GET['order'] ) {
			$this->sorting['order'] = strtoupper( $_GET['order'] );
		}

		$this->sorting = wp_parse_args( $this->sorting, $defaults );
	}

	private function parse_filters() {
		if ( isset( $_GET['s'] ) ) {
			$s = stripslashes( $_GET['s'] );
			if ( $s ) {
				$this->filters['s'] =  $s;
			}
		}

		$this->filters['worker_id'] = isset( $_GET['app_provider_id'] ) && absint( $_GET['app_provider_id'] ) ? absint( $_GET['app_provider_id'] ) : false;
		$this->filters['service_id'] = isset( $_GET['app_service_id'] ) && absint( $_GET['app_service_id'] ) ? absint( $_GET['app_service_id'] ) : false;

		$allowed_types = array_keys( $this->get_types() );
		if ( isset( $_GET['type'] ) && in_array( $_GET['type'], $allowed_types ) ) {
			$this->filters['type'] = $_GET['type'];
		}

		switch ( $this->filters['type'] ) {
			case 'active':
				$this->filters['status'] = array( 'confirmed', 'paid' );
				break;
			default:
				$this->filters['status'] = array( $this->filters['type'] );
				break;
		}
	}

	private function parse_pagination_args() {
		if ( empty( $_GET['paged'] ) ) {
			$paged = 1;
		} else {
			$paged = ( (int) $_GET['paged'] );
		}

		$current_screen = get_current_screen();
		$screen_option = $current_screen->get_option( 'per_page', 'option' );
		$rpp = get_user_meta( get_current_user_id(), $screen_option, true );
		if ( empty ( $rpp ) || $rpp < 1 ) {
			$rpp = $current_screen->get_option( 'per_page', 'default' );
		}

		$this->pagination_args['per_page'] = $rpp;
		$this->pagination_args['page']     = $paged;
	}

	/**
	 *	Creates the list for Appointments admin page
	 */
	function appointment_list() {
		$appointments = appointments();

		$this->parse_filters();
		$this->parse_sorting();
		$this->parse_pagination_args();

		$type = $this->filters['type'];
		$s = $this->filters['s'];
		$worker_id = $this->filters['worker_id'];
		$service_id = $this->filters['service_id'];
		$status = $this->filters['status'];
		$orderby = $this->sorting['orderby'];
		$order = $this->sorting['order'];

		$rpp = $this->pagination_args['per_page'];
		$paged = $this->pagination_args['page'];

		// Count appointments by statuses
		$args = array(
			's' => $s,
			'worker' => $worker_id,
			'service' => $service_id
		);

		$status_count = appointments_count_appointments( $args );

		// Get appointments
		$args['per_page'] = $rpp;
		$args['page'] = $paged;
		$args['status'] = $this->filters['status'];
		$args['orderby'] = $this->sorting['orderby'];
		$args['order'] = $this->sorting['order'];

		$apps = appointments_get_appointments( $args );

		// Get the total number of appointments
		$args['count'] = true;
		$total = appointments_get_appointments( $args );

		$columns = array(
			'cb' => '<input type="checkbox" />',
			'app_ID' => __('ID','appointments'),
			'date' => __('Appointment Date','appointments'),
			'user' => __('Client','appointments'),
			'service' => __('Service','appointments'),
			'worker' => __('Provider','appointments'),
			'created' => __('Created on','appointments'),
			'status' => __('Status','appointments')
		);

		$default_columns = $columns;

		$columns = apply_filters( 'appointments_my_appointments_list_columns', $columns );

		$sortable_columns = array( 'created' => 'ID', 'date' => 'start' );
		$sortables = array();
		foreach ( $sortable_columns as $col => $field ) {
			$sortables[ $col ] = array( 'field' => $field );
			if ( $this->sorting['orderby'] === $field ) {
				$sortables[ $col ]['order'] = 'ASC' === $this->sorting['order'] ? 'ASC' : 'DESC';
				$sortables[ $col ]['sorting'] = true;
			}
			else {
				$sortables[ $col ]['order'] = 'ASC';
				$sortables[ $col ]['sorting'] = false;
			}
		}

		$pag_args = array(
			'base' => add_query_arg( 'paged', '%#%' ),
			'format' => '',
			'total' => ceil($total / $rpp),
			'current' => $paged,
			'type' => 'array'
		);
		$trans_navigation = paginate_links( $pag_args );

		$pagination_args = array(
			'total' => $total,
			'total_pages' => ceil( $total / $rpp ),
			'current' => $paged
		);

		?>
		<div class='wrap'>
			<h1><?php echo __('Appointments','appointments'); ?><a href="javascript:void(0)" class="add-new-h2"><?php _e('Add New', 'appointments')?></a>
				<img class="add-new-waiting" style="display:none;" src="<?php echo admin_url('images/spinner.gif')?>" alt="">
			</h1>

			<?php include_once( appointments_plugin_dir() . 'admin/views/page-appointments-status-filter.php' ); ?>
			<?php include_once( appointments_plugin_dir() . 'admin/views/page-appointments-nav-filter.php' ); ?>
			<?php include_once( appointments_plugin_dir() . 'admin/views/page-appointments-list.php' ); ?>

		</div> <!-- wrap -->
		<?php

	}

	public static function pagination( $args, $which = 'top' ) {
		$total_items = $args['total'];
		$total_pages = $args['total_pages'];

		if ( $total_pages > 1 ) {
			echo '<h2 class="screen-reader-text">' . __( 'Appointments list navigation', 'appointments' ) . '</h2>';
		}

		$output = '<span class="displaying-num">' . sprintf( _n( '%s item', '%s items', $total_items ), number_format_i18n( $total_items ) ) . '</span>';

		$current = $args['current'];

		$current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );

		$current_url = remove_query_arg( array( 'hotkeys_highlight_last', 'hotkeys_highlight_first' ), $current_url );

		$page_links = array();

		$total_pages_before = '<span class="paging-input">';
		$total_pages_after  = '</span>';

		$disable_first = $disable_last = $disable_prev = $disable_next = false;

		if ( $current == 1 ) {
			$disable_first = true;
			$disable_prev = true;
		}
		if ( $current == 2 ) {
			$disable_first = true;
		}
		if ( $current == $total_pages ) {
			$disable_last = true;
			$disable_next = true;
		}
		if ( $current == $total_pages - 1 ) {
			$disable_last = true;
		}

		if ( $disable_first ) {
			$page_links[] = '<span class="tablenav-pages-navspan" aria-hidden="true">&laquo;</span>';
		} else {
			$page_links[] = sprintf( "<a class='first-page' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
				esc_url( remove_query_arg( 'paged', $current_url ) ),
				__( 'First page' ),
				'&laquo;'
			);
		}

		if ( $disable_prev ) {
			$page_links[] = '<span class="tablenav-pages-navspan" aria-hidden="true">&lsaquo;</span>';
		} else {
			$page_links[] = sprintf( "<a class='prev-page' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
				esc_url( add_query_arg( 'paged', max( 1, $current-1 ), $current_url ) ),
				__( 'Previous page' ),
				'&lsaquo;'
			);
		}

		if ( 'bottom' === $which ) {
			$html_current_page  = $current;
			$total_pages_before = '<span class="screen-reader-text">' . __( 'Current Page' ) . '</span><span id="table-paging" class="paging-input">';
		} else {
			$html_current_page = sprintf( "%s<input class='current-page' id='current-page-selector' type='text' name='paged' value='%s' size='%d' aria-describedby='table-paging' />",
				'<label for="current-page-selector" class="screen-reader-text">' . __( 'Current Page' ) . '</label>',
				$current,
				strlen( $total_pages )
			);
		}
		$html_total_pages = sprintf( "<span class='total-pages'>%s</span>", number_format_i18n( $total_pages ) );
		$page_links[] = $total_pages_before . sprintf( _x( '%1$s of %2$s', 'paging' ), $html_current_page, $html_total_pages ) . $total_pages_after;

		if ( $disable_next ) {
			$page_links[] = '<span class="tablenav-pages-navspan" aria-hidden="true">&rsaquo;</span>';
		} else {
			$page_links[] = sprintf( "<a class='next-page' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
				esc_url( add_query_arg( 'paged', min( $total_pages, $current+1 ), $current_url ) ),
				__( 'Next page' ),
				'&rsaquo;'
			);
		}

		if ( $disable_last ) {
			$page_links[] = '<span class="tablenav-pages-navspan" aria-hidden="true">&raquo;</span>';
		} else {
			$page_links[] = sprintf( "<a class='last-page' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
				esc_url( add_query_arg( 'paged', $total_pages, $current_url ) ),
				__( 'Last page' ),
				'&raquo;'
			);
		}

		$pagination_links_class = 'pagination-links';
		$output .= "\n<span class='$pagination_links_class'>" . join( "\n", $page_links ) . '</span>';

		if ( $total_pages ) {
			$page_class = $total_pages < 2 ? ' one-page' : '';
		} else {
			$page_class = ' no-pages';
		}
		$output = "<div class='tablenav-pages{$page_class}'>$output</div>";

		echo $output;
	}

	/**
	 * Prints "deleted" message on top of Admin page
	 */
	function deleted( ) {
		echo '<div class="updated fade"><p><b>[Appointments+]</b> '. __('Selected record(s) deleted.','appointments').'</p></div>';
	}

	/**
	 * Prints "updated" message on top of Admin page
	 */
	function updated( ) {
		echo '<div class="updated fade"><p><b>[Appointments+]</b> '. __('Selected record(s) updated.','appointments').'</p></div>';
	}
}