class Inventory_Presser_Location_Phones extends WP_Widget {

	const ID_BASE = '_invp_phone';

	/**
	 * Defines the formats for the widget's display.
	 *
	 * @return array
	 */
	protected function formats() {
		return array(
			'small_left_label'      => array(
				'selector'    => __( 'Small, left label', 'inventory-presser' ),
				'uses_labels' => true,
				'before'      => '<table>',
				'repeater'    => '<tr><th>%1$s</th><td class="phone-link"><a href="tel:+%2$s">%3$s</a></td><tr>',
				'after'       => '</table>',
			),
			'large_no_label'        => array(
				'selector'    => __( 'Large, no label', 'inventory-presser' ),
				'uses_labels' => false,
				'before'      => '',
				'repeater'    => '<h2><a href="tel:+%1$s">%2$s</a></h2>',
				'after'       => '',
			),
			'large_table_left'      => array(
				'selector'    => __( 'Large tabled, left label', 'inventory-presser' ),
				'uses_labels' => true,
				'before'      => '<table>',
				'repeater'    => '<tr><th>%1$s</th><td class="phone-link"><a href="tel:+%2$s">%3$s</a></td><tr>',
				'after'       => '</table>',
			),
			'large_left_label'      => array(
				'selector'    => __( 'Large, small left label', 'inventory-presser' ),
				'uses_labels' => true,
				'before'      => '<table>',
				'repeater'    => '<tr><th>%1$s</th><td><h2><a href="tel:+%2$s">%3$s</a></h2></td><tr>',
				'after'       => '</table>',
			),
			'large_right_label'     => array(
				'selector'    => __( 'Large, small right label', 'inventory-presser' ),
				'uses_labels' => true,
				'before'      => '<table>',
				'repeater'    => '<tr><td><h2><a href="tel:+%2$s">%3$s</a></h2></td><th>%1$s</th><tr>',
				'after'       => '</table>',
			),
			'single_line_labels'    => array(
				'selector'    => __( 'Single line with labels', 'inventory-presser' ),
				'uses_labels' => true,
				'before'      => '',
				'repeater'    => '<span>%1$s:</span> <a href="tel:+%2$s">%3$s</a>',
				'after'       => '',
			),
			'single_line_no_labels' => array(
				'selector'    => __( 'Single line no labels', 'inventory-presser' ),
				'uses_labels' => false,
				'before'      => '',
				'repeater'    => '<span><a href="tel:+%1$s">%2$s</a></span>',
				'after'       => '',
			),
		);
	}

	/**
	 * Calls the parent class' contructor and adds a hook that will delete the
	 * option that stores this widget's data when the plugin's delete all data
	 * method is run.
	 *
	 * @return void
	 */
	public function __construct() {
		parent::__construct(
			self::ID_BASE,
			__( 'Phone Number', 'inventory-presser' ),
			array(
				'description'           => __( 'Display one or more phone numbers.', 'inventory-presser' ),
				'show_instance_in_rest' => true,
			)
		);

		add_action( 'invp_delete_all_data', array( $this, 'delete_option' ) );
	}

	/**
	 * Deletes the option that stores this widget's data.
	 *
	 * @return void
	 */
	public function delete_option() {
		delete_option( 'widget_' . self::ID_BASE );
	}

	/**
	 * Outputs the widget front-end HTML
	 *
	 * @param  array $args
	 * @param  array $instance
	 * @return void
	 */
	public function widget( $args, $instance ) {
		if ( empty( $instance['cb_display'] ) || ! is_array( $instance['cb_display'] ) ) {
			return;
		}

		// before and after widget arguments are defined by themes.
		echo $args['before_widget'];

		$title = apply_filters( 'widget_title', $instance['title'] );
		if ( ! empty( $title ) ) {
			echo $args['before_title'] . $title . $args['after_title'];
		}

		$format_slugs = array_keys( $this->formats() );
		$format       = in_array( $instance['format'], $format_slugs ) ? $instance['format'] : $format_slugs[0];

		printf(
			'<div class="invp-%s">%s',
			$format,
			$this->formats()[ $format ]['before']
		);

		// loop through each location.
		$location_info = get_terms(
			array(
				'taxonomy'   => 'location',
				'fields'     => 'id=>name',
				'hide_empty' => false,
			)
		);
		foreach ( $location_info as $term_id => $name ) {
			// Does this address even have a phone number displayed by this instance of this widget?
			if ( empty( $instance['cb_display'][ $term_id ] ) ) {
				// No.
				continue;
			}

			for ( $p = 1; $p <= INVP::LOCATION_MAX_PHONES; $p++ ) {
				$phone_uid = get_term_meta( $term_id, 'phone_' . $p . '_uid', true );
				if ( ! $phone_uid ) {
					break;
				}

				// There is a phone number is slot $p, has the user configured this widget to display it?
				if ( in_array( $phone_uid, $instance['cb_display'][ $term_id ], true ) ) {
					// Yes, output this number.
					$number = get_term_meta( $term_id, 'phone_' . $p . '_number', true );
					if ( $this->formats()[ $format ]['uses_labels'] ) {
						$description = get_term_meta( $term_id, 'phone_' . $p . '_description', true );
						printf( $this->formats()[ $format ]['repeater'], $description, INVP::prepare_phone_number_for_link( $number ), $number );
					} else {
						printf( $this->formats()[ $format ]['repeater'], INVP::prepare_phone_number_for_link( $number ), $number );
					}
				}
			}
		}

		echo $this->formats()[ $format ]['after']
		. '</div>'
		. $args['after_widget'];
	}

	/**
	 * Outputs the widget settings form that is shown in the dashboard.
	 *
	 * @param  array $instance
	 * @return void
	 */
	public function form( $instance ) {
		$cb_display = isset( $instance['cb_display'] ) ? $instance['cb_display'] : array();
		// get all locations.
		$location_info = get_terms(
			array(
				'taxonomy'   => 'location',
				'fields'     => 'id=>name',
				'hide_empty' => false,
			)
		);
		$phones_table  = '<table><tbody>';

		// loop through each location, set up form.
		foreach ( $location_info as $term_id => $name ) {
			// Output a checkbox for every phone number in this location.
			for ( $p = 1; $p <= INVP::LOCATION_MAX_PHONES; $p++ ) {
				// Is there a phone number in this slot?
				$phone_uid = get_term_meta( $term_id, 'phone_' . $p . '_uid', true );
				if ( ! $phone_uid ) {
					// No, we're done with this location.
					break;
				}

				// Only do this once per location.
				if ( 1 == $p ) {
					$phones_table .= sprintf( '<tr><td colspan="3"><strong>%s</strong></td></tr>', $name );
				}

				$number      = get_term_meta( $term_id, 'phone_' . $p . '_number', true );
				$description = get_term_meta( $term_id, 'phone_' . $p . '_description', true );
				$checkbox_id = $this->get_field_id( 'cb_display_' . $phone_uid );

				$cb_display_text = sprintf(
					'<input type="checkbox" id="%s" name="%s" value="%s"%s />',
					$checkbox_id,
					$this->get_field_name( 'cb_display[' . $term_id . '][]' ),
					$phone_uid,
					checked( ( isset( $cb_display[ $term_id ] ) && is_array( $cb_display[ $term_id ] ) && in_array( $phone_uid, $cb_display[ $term_id ], true ) ), true, false )
				);

				$phones_table .= sprintf(
					'<tr><td>%s</td><td><label for="%s">%s</label></td><td><label for="%s">%s</label></td></tr>',
					$cb_display_text,
					$checkbox_id,
					$description,
					$checkbox_id,
					$number
				);
			}
		}

		$phones_table .= '</tbody></table>';

		// Widget admin form.
		$title = isset( $instance['title'] ) ? $instance['title'] : '';
		?>
		<p>
			<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php esc_html_e( 'Title (optional):', 'inventory-presser' ); ?></label>
			<input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />
		</p>
		<p>
			<label for="<?php echo esc_attr( $this->get_field_id( 'format' ) ); ?>"><?php esc_html_e( 'Display Format:', 'inventory-presser' ); ?></label>
			<select class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'format' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'format' ) ); ?>">
		<?php
		$format = isset( $instance['format'] ) ? $instance['format'] : current( array_keys( $this->formats() ) );
		foreach ( $this->formats() as $key => $format_array ) {
			printf(
				'<option value="%s"%s>%s</option>',
				esc_attr( $key ),
				selected( $format == $key, true, false ),
				$format_array['selector']
			);
		}
		?>
			</select>
		</p>
		<p><?php echo $phones_table; ?></p>
		<?php
	}

	/**
	 * Saves the widget settings when a dashboard user clicks the Save button.
	 *
	 * @param  array $new_instance
	 * @param  array $old_instance
	 * @return array The updated array full of settings
	 */
	public function update( $new_instance, $old_instance ) {
		$instance               = array();
		$instance['title']      = ( ! empty( $new_instance['title'] ) ) ? wp_strip_all_tags( $new_instance['title'] ) : '';
		$instance['format']     = ( ! empty( $new_instance['format'] ) ) ? $new_instance['format'] : current( array_keys( $this->formats() ) );
		$instance['cb_display'] = ( ! empty( $new_instance['cb_display'] ) ) ? $new_instance['cb_display'] : array();
		return $instance;
	}
}