<?php

if ( ! class_exists( 'PluginUpdateCheckerPanel' ) && class_exists( 'Debug_Bar_Panel' ) ) {

	/**
	 * A Debug Bar panel for the plugin update checker.
	 */
	class PluginUpdateCheckerPanel extends Debug_Bar_Panel {
		/** @var TVE_PluginUpdateChecker */
		private $updateChecker;

		public function __construct( $updateChecker ) {
			$this->updateChecker = $updateChecker;
			$title               = sprintf(
				'<span id="puc-debug-menu-link-%s">PUC (%s)</span>',
				esc_attr( $this->updateChecker->slug ),
				$this->updateChecker->slug
			);
			parent::Debug_Bar_Panel( $title );
		}

		public function render() {
			printf(
				'<div class="puc-debug-bar-panel" id="puc-debug-bar-panel_%1$s" data-slug="%1$s" data-nonce="%2$s">',
				esc_attr( $this->updateChecker->slug ),
				esc_attr( wp_create_nonce( 'puc-ajax' ) )
			);

			$responseBox = '<div class="puc-ajax-response" style="display: none;"></div>';

			echo '<h3>Configuration</h3>';
			echo '<table class="puc-debug-data">';
			$this->row( 'Plugin file', htmlentities( $this->updateChecker->pluginFile ) );
			$this->row( 'Slug', htmlentities( $this->updateChecker->slug ) );
			$this->row( 'DB option', htmlentities( $this->updateChecker->optionName ) );

			$requestInfoButton = function_exists( 'get_submit_button' ) ? get_submit_button( 'Request Info', 'secondary', 'puc-request-info-button', false ) : '';
			$this->row( 'Metadata URL', htmlentities( $this->updateChecker->metadataUrl ) . ' ' . $requestInfoButton . $responseBox );

			if ( $this->updateChecker->checkPeriod > 0 ) {
				$this->row( 'Automatic checks', 'Every ' . $this->updateChecker->checkPeriod . ' hours' );
			} else {
				$this->row( 'Automatic checks', 'Disabled' );
			}
			echo '</table>';

			echo '<h3>Status</h3>';
			echo '<table class="puc-debug-data">';
			$state          = $this->updateChecker->getUpdateState();
			$checkNowButton = function_exists( 'get_submit_button' ) ? get_submit_button( 'Check Now', 'secondary', 'puc-check-now-button', false ) : '';

			if ( isset( $state, $state->lastCheck ) ) {
				$this->row( 'Last check', $this->formatTimeWithDelta( $state->lastCheck ) . ' ' . $checkNowButton . $responseBox );
			} else {
				$this->row( 'Last check', 'Never' );
			}

			$nextCheck = wp_next_scheduled( $this->updateChecker->getCronHookName() );
			$this->row( 'Next automatic check', $this->formatTimeWithDelta( $nextCheck ) );

			if ( isset( $state, $state->checkedVersion ) ) {
				$this->row( 'Checked version', htmlentities( $state->checkedVersion ) );
				$this->row( 'Cached update', $state->update );
			}
			$this->row( 'Update checker class', htmlentities( get_class( $this->updateChecker ) ) );
			echo '</table>';

			$update = $this->updateChecker->getUpdate();
			if ( $update !== null ) {
				echo '<h3>An Update Is Available</h3>';
				echo '<table class="puc-debug-data">';
				$fields = array( 'version', 'download_url', 'slug', 'homepage', 'upgrade_notice' );
				foreach ( $fields as $field ) {
					$this->row( ucwords( str_replace( '_', ' ', $field ) ), htmlentities( $update->$field ) );
				}
				echo '</table>';
			} else {
				echo '<h3>No updates currently available</h3>';
			}

			echo '</div>';
		}

		private function formatTimeWithDelta( $unixTime ) {
			if ( empty( $unixTime ) ) {
				return 'Never';
			}

			$delta  = time() - $unixTime;
			$result = human_time_diff( time(), $unixTime );
			if ( $delta < 0 ) {
				$result = 'after ' . $result;
			} else {
				$result = $result . ' ago';
			}
			$result .= ' (' . $this->formatTimestamp( $unixTime ) . ')';

			return $result;
		}

		private function formatTimestamp( $unixTime ) {
			return gmdate( 'Y-m-d H:i:s', $unixTime + ( get_option( 'gmt_offset' ) * 3600 ) );
		}

		private function row( $name, $value ) {
			if ( is_object( $value ) || is_array( $value ) ) {
				$value = '<pre>' . htmlentities( print_r( $value, true ) ) . '</pre>';
			} else if ( $value === null ) {
				$value = '<code>null</code>';
			}
			printf( '<tr><th scope="row">%1$s</th> <td>%2$s</td></tr>', $name, $value );
		}
	}

}