class Inventory_Presser_Fuel_Economy_Widget extends WP_Widget {

	const ID_BASE = '_invp_fuel_economy_widget';

	/**
	 * 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, // Base ID.
			__( 'EPA Fuel Economy', 'inventory-presser' ), // Name.
			array(
				'description'           => __( 'MPG ratings for the current vehicle.', '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 settings form that is shown in the dashboard.
	 *
	 * @param  array $instance
	 * @return void
	 */
	public function form( $instance ) {
		$title = ( isset( $instance['title'] ) ? $instance['title'] : '' );
		?>
		<p>
			<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php esc_html_e( 'Title:', '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>
			<input type="checkbox" id="<?php echo esc_attr( $this->get_field_id( 'include_annual_stats' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'include_annual_stats' ) ); ?>" value="true"<?php checked( 'true', ( isset( $instance['include_annual_stats'] ) ? $instance['include_annual_stats'] : '' ) ); ?>>
			<label for="<?php echo esc_attr( $this->get_field_id( 'include_annual_stats' ) ); ?>"><?php esc_html_e( 'Include annual consumption, cost &amp; emissions', 'inventory-presser' ); ?></label>
		</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'] = sanitize_text_field( $new_instance['title'] );
		if ( ! empty( $new_instance['include_annual_stats'] ) ) {
			$instance['include_annual_stats'] = 'true';
		}
		return $instance;
	}

	/**
	 * Outputs the content of the widget
	 *
	 * @param array $args
	 * @param array $instance
	 */
	public function widget( $args, $instance ) {
		// if we aren't looking at a single vehicle, abort.
		if ( ! is_singular( INVP::POST_TYPE ) ) {
			return;
		}

		$queried_object = get_queried_object();
		if ( ! $queried_object ) {
			return;
		}

		// if the vehicle doesn't have EPA data, abort.
		if ( empty( invp_get_the_fuel_economy_value( 'city', 1, $queried_object->ID ) ) || empty( invp_get_the_fuel_economy_value( 'highway', 1, $queried_object->ID ) ) ) {
			return;
		}

		// Need the stylesheet for this content.
		wp_enqueue_style( 'invp-epa-fuel-economy' );

		echo wp_kses_post( $args['before_widget'] )
		. wp_kses_post( $args['before_title'] )
		. esc_html( apply_filters( 'widget_title', ( isset( $instance['title'] ) ? $instance['title'] : '' ) ) )
		. wp_kses_post( $args['after_title'] );

		// There could be two fuel types.
		$fuel_types = 0;

		if ( ! empty( invp_get_the_fuel_economy_value( 'city', 1, $queried_object->ID ) ) ) {
			++$fuel_types;
		}

		if ( ! empty( invp_get_the_fuel_economy_value( 'city', 2, $queried_object->ID ) ) ) {
			++$fuel_types;
		}

		for ( $t = 1; $t <= $fuel_types; $t++ ) {
			// name.
			if ( ! empty( invp_get_the_fuel_economy_value( 'name', $t, $queried_object->ID ) ) ) {
				printf(
					'<div class="fuel-name">%s</div>',
					esc_html( invp_get_the_fuel_economy_value( 'name', $t, $queried_object->ID ) )
				);
			}

			echo '<div class="fuel-economy-fuel">';

			// Combined.
			if ( ! empty( invp_get_the_fuel_economy_value( 'combined', $t, $queried_object->ID ) ) ) {
				printf(
					'<div class="fuel-economy-combined"><span class="number">%s</span></div><div class="fuel-economy-combined-label">%s</div>',
					esc_html( invp_get_the_fuel_economy_value( 'combined', $t, $queried_object->ID ) ),
					esc_html__( 'combined', 'inventory-presser' )
				);
			}

			// MPG and pump icon.
			printf(
				'<div class="mpg">%s'
				. '<svg class="fuel-pump" xmlns="https://www.w3.org/2000/svg" width="792" height="720" viewBox="0 0 792 720"><path class="fuel-pump-img" d="M598.1 406c0 74.3-0.1 160.3-0.1 234.6 0 7.3 0.1 14.9 0 22.2 -0.2 29.6-1 29.6-31.6 29.6 -96.7 0.1-193.4 0-290.1-0.1 -19.1 0-38.3-0.1-58.3 0 -23.7 0.1-24.7-0.9-24.7-29.4 0.3-186.6-0.3-373.3-0.3-560 0-47.1 28.1-74.7 76.8-75 79.1-0.5 158.2-0.5 237.3-0.1 15.2 0.1 30.9 1.9 45.6 5.6 26 6.7 45.6 29.1 45.1 54.9 -0.1 3 0.3 26.1 0.3 26.1s10.2 11.7 25.5 24.5c23.7 20.1 44.9 42.9 67.7 64.1 21.8 20.2 31.2 45 31.5 73.3 0.3 35.7 2 71.4-0.5 106.9 -2.6 36.4 8 76.7 28.7 105.9 21.8 30.8 38.2 76.5 25.4 124.7 -15.5 44.3-40.7 63.6-91.2 60.2 -35.5-2.4-63-30.7-63.6-67.8 -0.7-46.1 0.3-92.3-0.1-138.4 -0.1-13.5 0-32.6-0.7-46.1C619.9 403.3 608.9 406 598.1 406zM285.7 73.3c-33.7-0.1-49.4 13.7-49.4 46 0 42.7 0.1 85.6 0.1 128.7 0 27.3 10 40.2 37.5 41.2 79.8 2.7 164.7 4 244.6 3 24.6-0.3 38.9-18.4 38.9-42.2 0.1-44-0.1-90-0.1-131.8 0-32.9-12.6-43-46.4-43.9C474.7 73.1 322.9 73.4 285.7 73.3zM598.5 378.7c53.8 0 51.5 20.6 52.1 67.6 0.6 50.3 1.1 100.5 1.3 150.8 0.2 43.6 26 49.5 46.3 48.4 27.1-1.5 47-22.7 49.1-49.7 2.2-27.9-1.6-54.6-16.8-78.5 -29-45.7-44.7-93.7-38.6-148.8 1.2-10.7-9-25.1-16.5-32.5 -55.2-53.9-45.9-58-46.4-111.9 0-4.1-0.8-41.9-0.8-41.9l-29.6-26.9C598.5 155.5 598.5 312.3 598.5 378.7z"/></svg>'
				. '</div>',
				esc_html__( 'MPG', 'inventory-presser' )
			);

			if ( ! empty( invp_get_the_fuel_economy_value( 'city', $t, $queried_object->ID ) ) ) {
				printf(
					'<div class="fuel-economy-city"><span class="number">%s</span></div><div class="fuel-economy-city-label">%s</div>',
					esc_html( invp_get_the_fuel_economy_value( 'city', $t, $queried_object->ID ) ),
					esc_html__( 'city', 'inventory-presser' )
				);
			}

			if ( ! empty( invp_get_the_fuel_economy_value( 'highway', $t, $queried_object->ID ) ) ) {
				printf(
					'<div class="fuel-economy-highway"><span class="number">%s</span></div><div class="fuel-economy-highway-label">%s</div>',
					esc_html( invp_get_the_fuel_economy_value( 'highway', $t, $queried_object->ID ) ),
					esc_html__( 'highway', 'inventory-presser' )
				);
			}
			echo '</div>';

			// Are we including an optional second section with annual consumption, cost & emissions?
			if ( ! empty( $instance['include_annual_stats'] )
				&& ( ! empty( invp_get_the_fuel_economy_value( 'five_year_savings', null, $queried_object->ID ) )
				|| ! empty( invp_get_the_fuel_economy_value( 'annual_consumption', $t, $queried_object->ID ) )
				|| ! empty( invp_get_the_fuel_economy_value( 'annual_cost', $t, $queried_object->ID ) )
				|| empty( invp_get_the_fuel_economy_value( 'annual_emissions', $t, $queried_object->ID ) ) )
			) {
				// Yes.
				echo '<dl class="fuel-economy-annual-stats">';

				// Five year savings.
				if ( ! empty( invp_get_the_fuel_economy_value( 'five_year_savings', null, $queried_object->ID ) ) ) {
					printf(
						'<dt>%s</dt><dd>%s</dd>',
						esc_html__( 'Five year savings compared to average vehicle', 'inventory-presser' ),
						esc_html( '$' . number_format( invp_get_the_fuel_economy_value( 'five_year_savings', null, $queried_object->ID ), 0, '.', ',' ) )
					);
				}

				// Annual consumption.
				if ( ! empty( invp_get_the_fuel_economy_value( 'annual_consumption', $t, $queried_object->ID ) ) ) {
					$number = invp_get_the_fuel_economy_value( 'annual_consumption', $t, $queried_object->ID );
					if ( is_numeric( $number ) ) {
						$number = round( $number, 2 );
					}
					printf(
						'<dt>%s</dt><dd>%s %s</dd>',
						esc_html__( 'Annual fuel consumption', 'inventory-presser' ),
						esc_html( $number ),
						esc_html__( 'barrels', 'inventory-presser' )
					);
				}

				// Annual cost.
				if ( ! empty( invp_get_the_fuel_economy_value( 'annual_cost', $t, $queried_object->ID ) ) ) {
					$price = invp_get_the_fuel_economy_value( 'annual_cost', $t, $queried_object->ID );
					if ( is_numeric( $price ) ) {
						$price = sprintf( '$%s', number_format( $price, 0, '.', ',' ) );
					}
					printf(
						'<dt>%s</dt><dd>%s</dd>',
						esc_html__( 'Annual fuel cost', 'inventory-presser' ),
						esc_html( $price )
					);
				}

				// Annual emissions.
				if ( ! empty( invp_get_the_fuel_economy_value( 'annual_emissions', $t, $queried_object->ID ) ) ) {
					printf(
						'<dt>%s</dt><dd>%s %s</dd>',
						esc_html__( 'Annual tailpipe CO2 emissions', 'inventory-presser' ),
						esc_html( invp_get_the_fuel_economy_value( 'annual_emissions', $t, $queried_object->ID ) ),
						esc_html__( 'grams per mile', 'inventory-presser' )
					);
				}

				echo '</dl>';
			}
		}

		echo wp_kses_post( $args['after_widget'] );
	}
}