<?php

/**
 * Register, display and save a schedule of dates and times.
 *
 * This is designed for use for opening hours, a booking schedule or anything
 * that requires recurring dates and times.
 *
 * @since 2.0
 * @package Simple Admin Pages
 */

class sapAdminPageSettingScheduler_2_6_22 extends sapAdminPageSetting_2_6_22 {

	public $sanitize_callback = 'sanitize_text_field';

	/**
	 * Scripts that must be loaded for this component
	 * @since 2.0.a.4
	 */
	public $scripts = array(
		'pickadate' => array(
			'path'			=> 'lib/pickadate/picker.js',
			'dependencies'	=> array( 'jquery' ),
			'version'		=> '3.6.1',
			'footer'		=> true,
		),
		'pickadate-date' => array(
			'path'			=> 'lib/pickadate/picker.date.js',
			'dependencies'	=> array( 'jquery' ),
			'version'		=> '3.6.1',
			'footer'		=> true,
		),
		'pickadate-time' => array(
			'path'			=> 'lib/pickadate/picker.time.js',
			'dependencies'	=> array( 'jquery' ),
			'version'		=> '3.6.1',
			'footer'		=> true,
		),
		'pickadate-legacy' => array(
			'path'			=> 'lib/pickadate/legacy.js',
			'dependencies'	=> array( 'jquery' ),
			'version'		=> '3.6.1',
			'footer'		=> true,
		),
		'sap-scheduler' => array(
			'path'			=> 'js/scheduler.js',
			'dependencies'	=> array( 'jquery' ),
			'version'		=> SAP_VERSION,
			'footer'		=> true,
		),
		// @todo there should be some way to load alternate language .js files
		//	and RTL CSS scripts
	);

	/**
	 * Styles that must be loaded for this component
	 * @since 2.0.a.4
	 */
	public $styles = array(
		'pickadate-default' => array(
			'path'			=> 'lib/pickadate/themes/default.css',
			'dependencies'	=> '',
			'version'		=> '3.6.1',
			'media'			=> null,
		),
		'pickadate-date' => array(
			'path'			=> 'lib/pickadate/themes/default.date.css',
			'dependencies'	=> '',
			'version'		=> '3.6.1',
			'media'			=> null,
		),
		'pickadate-time' => array(
			'path'			=> 'lib/pickadate/themes/default.time.css',
			'dependencies'	=> '',
			'version'		=> '3.6.1',
			'media'			=> null,
		),
	);

	/**
	 * Used for data storage. Not translated
	 */
	public $weekdays = array(
		'monday'		=> 'Mo',
		'tuesday'		=> 'Tu',
		'wednesday'		=> 'We',
		'thursday'		=> 'Th',
		'friday'		=> 'Fr',
		'saturday'		=> 'Sa',
		'sunday'		=> 'Su',
	);

	/**
	 * Used for data storage. Not translated
	 */
	public $weeks = array(
		'first'		=> '1st',
		'second'	=> '2nd',
		'third'		=> '3rd',
		'fourth'	=> '4th',
		'last'		=> 'last',
	);

	/**
	 * Translateable strings required for this component
	 * @since 2.0.a.8
	 */
	public $strings = array(
		'add_rule'      => null, // __( 'Add new scheduling rule', 'textdomain' ),
		'weekly'        => null, // _x( 'Weekly', 'Format of a scheduling rule', 'textdomain' ),
		'monthly'       => null, // _x( 'Monthly', 'Format of a scheduling rule', 'textdomain' ),
		'date'          => null, // _x( 'Date', 'Format of a scheduling rule', 'textdomain' ),
		'date_range'    => null, // _x( 'Date Range', 'Format of a scheduling rule', 'textdomain' ),
		'weekdays'      => null, // _x( 'Days of the week', 'Label for selecting days of the week in a scheduling rule', 'textdomain' ),
		'month_weeks'   => null, // _x( 'Weeks of the month', 'Label for selecting weeks of the month in a scheduling rule', 'textdomain' ),
		'date_label'    => null, // _x( 'Date', 'Label to select a date for a scheduling rule', 'textdomain' ),
		'time_label'    => null, // _x( 'Time', 'Label to select a time slot for a scheduling rule', 'textdomain' ),
		'allday'        => null, // _x( 'All day', 'Label to set a scheduling rule to last all day', 'textdomain' ),
		'start'         => null, // _x( 'Start', 'Label for the starting date/time of a scheduling rule', 'textdomain' ),
		'end'           => null, // _x( 'End', 'Label for the ending date/time of a scheduling rule', 'textdomain' ),
		'set_time_prompt' => null, // _x( 'All day long. Want to %sset a time slot%s?', 'Prompt displayed when a scheduling rule is set without any time restrictions', 'textdomain' ),
		'toggle'          => null, // _x( 'Open and close this rule', 'Toggle a scheduling rule open and closed', 'textdomain' ),
		'delete'          => null, // _x( 'Delete rule', 'Delete a scheduling rule', 'textdomain' ),
		'delete_schedule' => null, // __( 'Delete scheduling rule', 'textdomain' ),
		'never'           => null, // _x( 'Never', 'Brief default description of a scheduling rule when no weekdays or weeks are included in the rule', 'textdomain' ),
		'weekly_always'   => null, // _x( 'Every day', 'Brief default description of a scheduling rule when all the weekdays/weeks are included in the rule', 'textdomain' ),
		'monthly_weekdays'  => null, // _x( '%s on the %s week of the month', 'Brief default description of a scheduling rule when some weekdays are included on only some weeks of the month. %s should be left alone and will be replaced by a comma-separated list of days and weeks in the following format: M, T, W on the first, second week of the month', 'textdomain' ),
		'monthly_weeks'   => null, // _x( '%s week of the month', 'Brief default description of a scheduling rule when some weeks of the month are included but all or no weekdays are selected. %s should be left alone and will be replaced by a comma-separated list of weeks in the following format: First, second week of the month', 'textdomain' ),
		'all_day'     => null, // _x( 'All day', 'Brief default description of a scheduling rule when no times are set', 'textdomain' ),
		'before'      => null, // _x( 'Ends at', 'Brief default description of a scheduling rule when an end time is set but no start time. If the end time is 6pm, it will read: Ends at 6pm', 'textdomain' ),
		'after'       => null, // _x( 'Starts at', 'Brief default description of a scheduling rule when a start time is set but no end time. If the start time is 6pm, it will read: Starts at 6pm', 'textdomain' ),
		'separator'   => null, // _x( '&mdash;', 'Separator between times of a scheduling rule', 'textdomain' ),
		'date_range_from_today'      => null, // _x( 'From Today', 'When Date range start date is not set', 'textdomain' ),
		'date_range_upto_indefinite' => null // _x( 'Upto Indefinite', 'When Date range end date is not set', 'textdomain' ),
	);

	/**
	 * Number of minutes between time selection intervals
	 */
	public $time_interval = 15;

	/**
	 * Display format for time selection
	 * See http://amsul.ca/pickadate.js/ for formatting options
	 */
	public $time_format = 'h:i A';

	/**
	 * Display format for date selection
	 * See http://amsul.ca/pickadate.js/ for formatting options
	 */
	public $date_format = 'd mmmm, yyyy';

	/**
	 * Boolean to disable the weekday selection option
	 */
	public $disable_weekdays = false;

	/**
	 * Boolean to disable the weeks selection option
	 */
	public $disable_weeks = false;

	/**
	 * Boolean to disable the date selection option
	 */
	public $disable_date = false;

	/**
	 * Boolean to disable the date range selection option
	 */
	public $disable_date_range = false;

	/**
	 * Boolean to disable the time selection option
	 */
	public $disable_time = false;

	/**
	 * Boolean to disable the end time selection option
	 */
	public $disable_end_time = false;

	/**
	 * Boolean to disable multiple rules per component
	 */
	public $disable_multiple = false;

	/**
	 * Schedule summary strings that can be passed to scripts
	 */
	public $schedule_summaries = array();

	/**
	 * Escape the value to display it in text fields and other input fields
	 * @since 2.0
	 */
	public function esc_value( $val ) {

		$value = array();

		if ( empty( $val ) ) {
			return $value;
		}

		foreach ( $val as $i => $rule ) {

			if ( !empty( $rule['weekdays'] ) ) {
				$value[$i]['weekdays'] = array();
				foreach ( $rule['weekdays'] as $day => $flag ) {
					if ( $flag !== '1' ) {
						continue;
					}

					$value[$i]['weekdays'][$day] = $flag;
				}
			}

			if ( !empty( $rule['weeks'] ) ) {
				$value[$i]['weeks'] = array();
				foreach ( $rule['weeks'] as $week => $flag ) {
					if ( $flag !== '1' ) {
						continue;
					}

					$value[$i]['weeks'][$week] = $flag;
				}
			}

			if ( !empty( $rule['date'] ) ) {
				$value[$i]['date'] = esc_attr( $rule['date'] );
			}

			if ( !empty( $rule['date_range'] ) ) {
				$value[$i]['date_range']['start'] = esc_attr( $rule['date_range']['start'] );
				$value[$i]['date_range']['end'] = esc_attr( $rule['date_range']['end'] );
			}

			if ( !empty( $rule['time']['start'] ) ) {
				$value[$i]['time']['start'] = esc_attr( $rule['time']['start'] );
			}
			if ( !empty( $rule['time']['end'] ) ) {
				$value[$i]['time']['end'] = esc_attr( $rule['time']['end'] );
			}
		}

		return $value;
	}

	/**
	 * Compile and pass configurable variables to the javascript file, so they
	 * can be used when we initialize the pickadate components
	 * @since 2.0
	 */
	public function pass_to_scripts() {

		// Create a global variable containing settings for all schedulers
		// that are being rendered on the page. This allows us to pass different
		// settings for different schedulers on the same page.
		global $sap_scheduler_settings;

		if ( !isset( $sap_scheduler_settings ) ) {
			$sap_scheduler_settings = array();
		}

		$sap_scheduler_settings[ $this->id ] = array(
			'time_interval' => $this->time_interval,
			'time_format'   => $this->time_format,
			'date_format'   => $this->date_format,
			'template'      => $this->get_template(),
			'weekdays'      => $this->weekdays,
			'weeks'         => $this->weeks,
			'disable_weekdays'  => $this->disable_weekdays,
			'disable_weeks'     => $this->disable_weeks,
			'disable_date'      => $this->disable_date,
			'disable_date_range'  => $this->disable_date_range,
			'disable_time'        => $this->disable_time,
			'disable_multiple'    => $this->disable_multiple,
			'summaries'           => $this->schedule_summaries,
		);

		// This gets called multiple times, but only the last call is actually
		// pushed to the script.
		wp_localize_script(
			'sap-scheduler',
			'sap_scheduler',
			array(
				'settings' => $sap_scheduler_settings
			)
		);

	}

	/**
	 * Display this setting
	 * @since 2.0
	 */
	public function display_setting() {

		$this->display_description();

		// Define summary text to use when a rule is displayed in brief
		$this->set_schedule_summaries();

		// Pass data to the script files to handle js interactions
		$this->pass_to_scripts();

		?>

		<fieldset <?php $this->print_conditional_data(); ?>>

			<div class="sap-scheduler <?php echo ( $this->disabled ? 'disabled' : ''); ?>" id="<?php echo esc_attr( $this->id ); ?>" data-next_rule_id="<?php echo esc_attr( $this->get_next_rule_id() ); ?>">
			<?php
				foreach ( $this->value as $id => $rule ) {
					echo $this->get_template( $id, $rule, true );
				}
			?>
			</div>

			<div class="sap-add-scheduler<?php if ( $this->disable_multiple && count( $this->value ) ) : ?> disabled<?php endif; ?>  <?php echo ( $this->disabled ? 'disabled' : ''); ?>">
				<a href="#" class="button">
					<?php echo esc_html( $this->strings['add_rule'] ); ?>
				</a>
			</div>

			<?php $this->display_disabled(); ?>	

		</fieldset>

		<?php
	}

	/**
	 * Retrieve the template for a scheduling rule
	 * @since 2.0
	 */
	public function get_template( $id = 0, $values = array(), $list = false ) {

		$date_format = $this->get_date_format( $values );
		$time_format = $this->get_time_format( $values );

		ob_start();
		?>

		<div class="sap-scheduler-rule clearfix<?php echo $list ? ' list' : ''; ?>">
			<div class="sap-scheduler-date <?php echo esc_attr( $date_format ); echo $this->disable_time === true ? ' full-width' : ''; ?>">
				<ul class="sap-selector">

				<?php if ( !$this->has_multiple_date_formats() ) : ?>
					<li>
						<div class="dashicons dashicons-calendar"></div>
						<?php if ( $date_format == 'weekly' ) : ?>
						<?php echo esc_html( $this->strings['weekly'] ); ?>
						<?php elseif ( $date_format == 'monthly' ) : ?>
						<?php echo esc_html( $this->strings['monthly'] ); ?>
						<?php elseif ( $date_format == 'date' ) : ?>
						<?php echo esc_html( $this->strings['date'] ); ?>
						<?php elseif ( $date_format == 'date_range' ) : ?>
						<?php echo esc_html( $this->strings['date_range'] ); ?>

						<?php endif; ?>
					</li>
				<?php else : ?>

					<?php if ( $this->disable_weekdays === false ) : ?>
					<li>
						<div class="dashicons dashicons-calendar"></div>
						<a href="#" data-format="weekly"<?php echo $date_format == 'weekly' ? ' class="selected"' : ''; ?>>
							<?php echo esc_html( $this->strings['weekly'] ); ?>
						</a>
					</li>
					<?php endif; ?>

					<?php if ( $this->disable_weeks === false ) : ?>
					<li>
						<a href="#" data-format="monthly"<?php echo $date_format == 'monthly' ? ' class="selected"' : ''; ?>>
							<?php echo esc_html( $this->strings['monthly'] ); ?>
						</a>
					</li>
					<?php endif; ?>

					<?php if ( $this->disable_date === false ) : ?>
					<li>
						<a href="#" data-format="date"<?php echo $date_format == 'date' ? ' class="selected"' : ''; ?>>
							<?php echo esc_html( $this->strings['date'] ); ?>
						</a>
					</li>
					<?php endif; ?>

					<?php if ( $this->disable_date_range === false ) : ?>
					<li>
						<a href="#" data-format="date_range"<?php echo $date_format == 'date_range' ? ' class="selected"' : ''; ?>>
							<?php echo $this->strings['date_range']; ?>
						</a>
					</li>
					<?php endif; ?>

				<?php endif; ?>
				</ul>

				<?php if ( $this->disable_weekdays === false ) : ?>
				<ul class="sap-scheduler-weekdays">
					<li class="label">
						<?php echo esc_html( $this->strings['weekdays'] ); ?>
					</li>
				<?php
					foreach ( $this->weekdays as $slug => $label ) :
						$input_name = $this->get_input_name() . '[' . $id . '][weekdays][' . $slug . ']';
				?>
					<li>
						&nbsp;<input type="checkbox" name="<?php echo esc_attr( $input_name ); ?>" id="<?php echo esc_attr( $input_name ); ?>" value="1"<?php echo empty( $values['weekdays'][$slug] ) ? '' : ' checked="checked"'; ?> data-day="<?php echo esc_attr( $slug ); ?>"><label for="<?php echo esc_attr( $input_name ); ?>"><?php echo ucfirst( $label ); ?></label>
					</li>
				<?php endforeach; ?>
				</ul>
				<?php endif; ?>

				<?php if ( $this->disable_weeks === false ) : ?>
				<ul class="sap-scheduler-weeks">
					<li class="label">
						<?php echo esc_html( $this->strings['month_weeks'] ); ?>
					</li>
				<?php
					foreach ( $this->weeks as $slug => $label ) :
						$input_name = $this->get_input_name() . '[' . $id . '][weeks][' . $slug . ']';
				?>
					<li>
						&nbsp;<input type="checkbox" name="<?php echo esc_attr( $input_name ); ?>" id="<?php echo esc_attr( $input_name ); ?>" value="1"<?php echo empty( $values['weeks'][$slug] ) ? '' : ' checked="checked"'; ?> data-week="<?php echo esc_attr( $slug ); ?>"><label for="<?php echo esc_attr( $input_name ); ?>"><?php echo ucfirst( $label ); ?></label>
					</li>
				<?php endforeach; ?>
				</ul>
				<?php endif; ?>

				<?php if ( $this->disable_date === false ) : ?>
				<div class="sap-scheduler-date-input">
					<label for="<?php echo $this->get_input_name(); ?>[<?php echo esc_attr( $id ); ?>][date]">
						<?php echo esc_html( $this->strings['date_label'] ); ?>
					</label>
					<input type="text" name="<?php echo esc_attr( $this->get_input_name() ); ?>[<?php echo esc_attr( $id ); ?>][date]" id="<?php echo esc_attr( $this->get_input_name() ); ?>[<?php echo esc_attr( $id ); ?>][date]" value="<?php echo empty( $values['date'] ) ? '' : esc_attr( $values['date'] ); ?>">
				</div>
				<?php endif; ?>

				<?php if ( $this->disable_date_range === false ) : ?>
				<?php $range_start_name = "{$this->get_input_name()}[{$id}][date_range][start]"; ?>
				<?php $range_end_name = "{$this->get_input_name()}[{$id}][date_range][end]"; ?>
				<div class="sap-scheduler-date-range-input">
					<div class="date-range-start">
						<label for="<?php echo $range_start_name; ?>">
							<?php echo $this->strings['start']; ?>
						</label>
						<input type="text" name="<?php echo $range_start_name; ?>" id="<?php echo $range_start_name; ?>" value="<?php echo empty( $values['date_range']['start'] ) ? '' : $values['date_range']['start']; ?>">
					</div>
					<div class="date-range-end">
						<label for="<?php echo $range_end_name; ?>">
							<?php echo $this->strings['end']; ?>
						</label>
						<input type="text" name="<?php echo $range_end_name; ?>" id="<?php echo $range_end_name; ?>" value="<?php echo empty( $values['date_range']['end'] ) ? '' : $values['date_range']['end']; ?>">
					</div>
				</div>
				<?php endif; ?>

			</div>

			<?php if ( $this->disable_time === false ) : ?>
			<div class="sap-scheduler-time <?php echo esc_attr( $time_format ); ?>">

				<ul class="sap-selector">
					<li>
						<div class="dashicons dashicons-clock"></div>
						<a href="#" data-format="time-slot"<?php echo $time_format == 'time-slot' ? ' class="selected"' : ''; ?>>
							<?php echo esc_html( $this->strings['time_label'] ); ?>
						</a>
					</li>
					<li>
						<a href="#" data-format="all-day"<?php echo $time_format == 'all-day' ? ' class="selected"' : ''; ?>>
							<?php echo esc_html( $this->strings['allday'] ); ?>
						</a>
					</li>
				</ul>

				<div class="sap-scheduler-time-input clearfix">

					<div class="start">
						<label for="<?php echo esc_attr( $this->get_input_name() ); ?>[<?php echo esc_attr( $id ); ?>][time][start]">
							<?php echo esc_html( $this->strings['start'] ); ?>
						</label>
						<input type="text" name="<?php echo esc_attr( $this->get_input_name() ) . '[' . esc_attr( $id ) . '][time][start]'; ?>" id="<?php echo esc_attr( $this->get_input_name() ) . '[' . esc_attr( $id ) . '][time][start]'; ?>" value="<?php echo empty( $values['time']['start'] ) ? '' : esc_attr( $values['time']['start'] ); ?>">
					</div>

					<?php if ( $this->disable_end_time === false ) : ?>
					<div class="end">
						<label for="<?php echo esc_attr( $this->get_input_name() ); ?>[<?php echo esc_attr( $id ); ?>][time][end]">
							<?php echo esc_html( $this->strings['end'] ); ?>
						</label>
						<input type="text" name="<?php echo esc_attr( $this->get_input_name() ) . '[' . esc_attr( $id ) . '][time][end]'; ?>" id="<?php echo esc_attr( $this->get_input_name() ) . '[' . esc_attr( $id ) . '][time][end]'; ?>" value="<?php echo empty( $values['time']['end'] ) ? '' : esc_attr( $values['time']['end'] ); ?>">
					</div>
					<?php endif; ?>

				</div>

				<div class="sap-scheduler-all-day">
					<?php printf( $this->strings['set_time_prompt'], '<a href="#" data-format="time-slot">', '</a>' ); ?>
				</div>

			</div>
			<?php endif; ?>

			<div class="sap-scheduler-brief">
				<div class="date">
					<div class="dashicons dashicons-calendar"></div>
					<span class="value"><?php echo esc_html( $this->get_date_summary( $values ) ); ?></span>
				</div>
				<?php if ( $this->disable_time === false ) : ?>
				<div class="time">
					<div class="dashicons dashicons-clock"></div>
					<span class="value"><?php echo esc_html( $this->get_time_summary( $values ) ); ?></span>
				</div>
				<?php endif; ?>
			</div>
			<div class="sap-scheduler-control">
				<a href="#" class="toggle" title="<?php echo esc_attr( $this->strings['toggle'] ); ?>">
					<div class="dashicons dashicons-<?php echo $list ? 'edit' : 'arrow-up-alt2'; ?>"></div>
					<span class="screen-reader-text">
						<?php echo esc_html( $this->strings['toggle'] ); ?>
					</span>
				</a>
				<a href="#" class="delete" title="<?php echo esc_attr( $this->strings['delete'] ); ?>">
					<div class="dashicons dashicons-dismiss"></div>
					<span class="screen-reader-text">
						<?php echo esc_html( $this->strings['delete_schedule'] ); ?>
					</span>
				</a>
			</div>
		</div>

		<?php
		$output = ob_get_clean();

		return $output;
	}

	/**
	 * Determine the date format of a rule (weeky/monthly/date)
	 * @since 2.0
	 */
	public function get_date_format( $values ) {

		if ( !empty( $values['date_range'] ) ) {
			return 'date_range';
		} elseif ( !empty( $values['date'] ) ) {
			return 'date';
		} elseif ( !empty( $values['weeks'] ) ) {
			return 'monthly';
		} elseif ( !empty( $values['weekdays'] ) ) {
			return 'weekly';
		}

		if ( $this->disable_weekdays === false ) {
			return 'weekly';
		}
		if ( $this->disable_weeks === false ) {
			return 'monthly';
		}
		if ( $this->disable_date === false ) {
			return 'date';
		}
		if ( $this->disable_date_range === false ) {
			return 'date_range';
		}
	}

	/**
	 * Determine the time format of a rule (time-slot/all-day)
	 * @since 2.0
	 */
	public function get_time_format( $values ) {
		if ( empty( $values['time']['start'] ) && empty( $values['time']['end'] ) ) {
			return 'all-day';
		}

		return 'time-slot';
	}

	/**
	 * Determine if multiple date formats are enabled
	 * @since 2.0
	 */
	public function has_multiple_date_formats() {
		$i = 0;
		if ( $this->disable_weekdays === false ) {
			$i++;
		}
		if ( $this->disable_weeks === false ) {
			$i++;
		}
		if ( $this->disable_date === false ) {
			$i++;
		}
		if ( $this->disable_date_range === false ) {
			$i++;
		}

		if ( $i > 1 ) {
			return true;
		} else {
			return false;
		}
	}

	/**
	 * Set some default summary strings that can be used when the scheduler
	 * rule is shown in brief
	 * @since 2.0
	 */
	public function set_schedule_summaries() {

		if ( !empty( $this->schedule_summaries ) ) {
			return;
		}

		$this->schedule_summaries = array(
			'never'            => $this->strings['never'],
			'weekly_always'    => $this->strings['weekly_always'],
			'monthly_weekdays' => sprintf( $this->strings['monthly_weekdays'], '{days}', '{weeks}' ),
			'monthly_weeks'    => sprintf( $this->strings['monthly_weeks'], '{weeks}' ),
			'all_day'          => $this->strings['all_day'],
			'before'           => $this->strings['before'],
			'after'            => $this->strings['after'],
			'separator'        => $this->strings['separator'],
			'from_today'       => $this->strings['date_range_from_today'],
			'upto_indefinite'  => $this->strings['date_range_upto_indefinite'],
		);
	}

	/**
	 * Print the date phrase, a brief description of the date settings
	 * @since 2.0
	 */
	public function get_date_summary( $values = array() ) {

		if ( isset( $values['date'] ) && !empty( $values['date'] ) ) {
			return $values['date'];
		}

		if ( isset( $values['date_range'] ) && !empty( $values['date_range']['start'] ) ) {
			
			$date_range = '';
			
			if( empty( $values['date_range']['start'] ) ) {
				$date_range .= $this->schedule_summaries['from_today'];
			}
			else {
				$date_range .= $values['date_range']['start'];
			}

			$date_range .= ' - ';


			if( empty( $values['date_range']['end'] ) ) {
				$date_range .= $this->schedule_summaries['upto_indefinite'];
			}
			else {
				$date_range .= $values['date_range']['end'];
			}

			return $date_range;
		}

		if ( empty( $values['weekdays'] ) && $this->disable_weekdays === false ) {
			return $this->schedule_summaries['never'];
		}

		if ( empty( $values['weekdays'] ) ) {
			$weekdays = '';
		} elseif ( count( $values['weekdays'] ) == 7 ) {
			$weekdays = $this->schedule_summaries['weekly_always'];
		} else {
			$arr = array();
			foreach ( $values['weekdays'] as $weekday => $state ) {
				$arr[] = $this->weekdays[$weekday];
			}
			$weekdays = join( ', ', $arr );
		}

		if ( ( empty( $values['weeks'] ) || count( $values['weeks'] ) == 5 ) && $this->disable_weekdays === false ) {
			return $weekdays;
		}

		if ( empty( $values['weeks'] ) ) {
			return $this->schedule_summaries['never'];
		}

		$arr = array();
		foreach ( $values['weeks'] as $weeks => $state ) {
			$arr[] = $this->weeks[$weeks];
		}
		$weeks = join( ', ', $arr );

		if ( !empty( $weekdays ) ) {
			return str_replace( array( '{days}', '{weeks}' ), array( $weekdays, $weeks ), $this->schedule_summaries['monthly_weekdays'] );
		} else {
			return str_replace( '{weeks}', ucfirst( $weeks ), $this->schedule_summaries['monthly_weeks'] );
		}

	}

	/**
	 * Print the time phrase, a brief description of the time settings
	 * @since 2.0
	 */
	public function get_time_summary( $values = array() ) {

		if ( empty( $values['time']['start'] ) && empty( $values['time']['end'] ) ) {
			return $this->schedule_summaries['all_day'];
		}

		if ( empty( $values['time']['start'] ) ) {
			return $this->schedule_summaries['before'] . ' ' . $values['time']['end'];
		}

		if ( empty( $values['time']['end'] ) ) {
			return $this->schedule_summaries['after'] . ' ' . $values['time']['start'];
		}

		return $values['time']['start'] . $this->schedule_summaries['separator'] . $values['time']['end'];

	}

	/**
	 * Sanitize the array of text inputs for this setting
	 * @since 2.0
	 */
	public function sanitize_callback_wrapper( $values ) {

		$output = array();

		if ( !is_array( $values ) || !count( $values ) ) {
			return $output;
		}

		foreach ( $values as $i => $rule ) {

			if ( !empty( $rule['weekdays'] ) ) {
				$output[$i]['weekdays'] = array();
				foreach ( $rule['weekdays'] as $day => $flag ) {
					if ( $flag !== '1' ||
							( $day !== 'monday' && $day !== 'tuesday' && $day !== 'wednesday' && $day !== 'thursday' && $day !== 'friday' && $day !== 'saturday' && $day !== 'sunday' ) ) {
						continue;
					}

					$output[$i]['weekdays'][$day] = $flag;
				}
			}

			if ( !empty( $rule['weeks'] ) ) {
				$output[$i]['weeks'] = array();
				foreach ( $rule['weeks'] as $week => $flag ) {
					if ( $flag !== '1' ||
							( $week !== 'first' && $week !== 'second' && $week !== 'third' && $week !== 'fourth' && $week !== 'last' ) ) {
						continue;
					}

					$output[$i]['weeks'][$week] = $flag;
				}
			}

			if ( !empty( $rule['date'] ) ) {
				$date = new DateTime( $rule['date'] );
				if ( checkdate( $date->format( 'n' ), $date->format( 'j' ), $date->format( 'Y' ) ) ) {
					$output[$i]['date'] = call_user_func( $this->sanitize_callback, $rule['date'] );
				}
			}

			if (
				! empty( $rule['date_range']['start'] )
				||
				! empty( $rule['date_range']['end'] )
				&&
				! ( empty( $rule['date_range']['start'] ) && empty( $rule['date_range']['end'] ) )
			) {
				if( ! empty( $rule['date_range']['start'] ) ) {
					$date = new DateTime( $rule['date_range']['start'] );
					if( checkdate( $date->format( 'n' ), $date->format( 'j' ), $date->format( 'Y' ) ) ) {
						$output[$i]['date_range']['start'] = call_user_func( $this->sanitize_callback, $rule['date_range']['start'] );
					}
				}
				else {
					$output[$i]['date_range']['start'] = '';
				}

				if( ! empty( $rule['date_range']['end'] ) ) {
					$date = new DateTime( $rule['date_range']['end'] );
					if( checkdate( $date->format( 'n' ), $date->format( 'j' ), $date->format( 'Y' ) ) ) {
						$output[$i]['date_range']['end'] = call_user_func( $this->sanitize_callback, $rule['date_range']['end'] );
					}
				}
				else {
					$output[$i]['date_range']['end'] = '';
				}
			}

			if ( !empty( $rule['time']['start'] ) ) {
				$output[$i]['time']['start'] = call_user_func( $this->sanitize_callback, $rule['time']['start'] );
			}
			if ( !empty( $rule['time']['end'] ) ) {
				$output[$i]['time']['end'] = call_user_func( $this->sanitize_callback, $rule['time']['end'] );
			}
		}

		// Only return the first rule if multiple rules are disabled
		if ( $this->disable_multiple && count( $output ) > 1 ) {
			$output = array( array_shift( $output ) );
		}

		return $output;
	}

	/**
	 * Returns the next valid rule ID, so that rules always have unique IDs
	 * @since 2.6.21
	 */
	public function get_next_rule_id() {

		if ( empty( $this->value ) ) { return 0; }

		if ( ! is_array( $this->value ) ) { return 0; }

		return max( array_keys( $this->value ) ) + 1;
	}

}
