<?php
/**
 * Pre-loads report data once a day.
 *
 * @package TurtleReport
 */

namespace TurtleReport\Cron;

use TurtleReport\Auth\ApiException;
use TurtleReport\Profiles\Profile;
use TurtleReport\Profiles\ProfileRepository;
use TurtleReport\Reports\Report;
use TurtleReport\Support\Periods;

defined( 'ABSPATH' ) || exit;

/**
 * Fetches each site's default report once a day so the first visitor
 * doesn't wait for Google.
 *
 * It makes exactly the requests the report screen makes for its opening
 * view (see Periods::default_period()), so the screen reads them from cache.
 */
final class CacheWarmer {

	/**
	 * Site storage.
	 *
	 * @var ProfileRepository
	 */
	private $sites;

	/**
	 * Reports keyed by ID.
	 *
	 * @var Report[]
	 */
	private $reports = array();

	/**
	 * Constructor.
	 *
	 * @param ProfileRepository $sites   Site storage.
	 * @param Report[]          $reports Registered reports.
	 */
	public function __construct( ProfileRepository $sites, array $reports ) {
		$this->sites = $sites;
		foreach ( $reports as $report ) {
			$this->reports[ $report->id() ] = $report;
		}
	}

	/**
	 * Warms every site. Google API errors are ignored; the report screen shows them.
	 *
	 * @return void
	 */
	public function warm_all() {
		foreach ( $this->sites->all() as $site ) {
			$this->warm( $site );
		}
	}

	/**
	 * Warms one site's opening view.
	 *
	 * @param Profile $site Site.
	 * @return void
	 */
	public function warm( Profile $site ) {
		$p = Periods::default_period();
		$t = Periods::trend( $p['e'] );

		$calls = array(
			array(
				'search-console',
				array(
					'dimension' => 'date',
					'start'     => $p['s'],
					'end'       => $p['e'],
				),
			),
			array(
				'search-console',
				array(
					'dimension' => 'date',
					'start'     => $p['ps'],
					'end'       => $p['pe'],
				),
			),
			array(
				'search-console',
				array(
					'dimension' => 'page',
					'start'     => $p['s'],
					'end'       => $p['e'],
				),
			),
			array(
				'search-console',
				array(
					'dimension' => 'page',
					'start'     => $p['ps'],
					'end'       => $p['pe'],
				),
			),
			array(
				'search-console',
				array(
					'dimension' => 'query',
					'start'     => $p['s'],
					'end'       => $p['e'],
				),
			),
			array(
				'search-console',
				array(
					'dimension' => 'query',
					'start'     => $p['ps'],
					'end'       => $p['pe'],
				),
			),
			array(
				'search-console',
				array(
					'dimension' => 'date',
					'start'     => $t['s'],
					'end'       => $t['e'],
				),
			),
			array(
				'segments',
				array(
					'start'      => $p['s'],
					'end'        => $p['e'],
					'prev_start' => $p['ps'],
					'prev_end'   => $p['pe'],
				),
			),
			array(
				'conversions',
				array(
					'kind'  => 'totals',
					'start' => $p['s'],
					'end'   => $p['e'],
				),
			),
			array(
				'conversions',
				array(
					'kind'  => 'totals',
					'start' => $p['ps'],
					'end'   => $p['pe'],
				),
			),
			array(
				'conversions',
				array(
					'kind'  => 'pages',
					'start' => $p['s'],
					'end'   => $p['e'],
				),
			),
			array(
				'conversions',
				array(
					'kind'  => 'pages',
					'start' => $p['ps'],
					'end'   => $p['pe'],
				),
			),
			array(
				'conversions',
				array(
					'kind'  => 'daily',
					'start' => $p['s'],
					'end'   => $p['e'],
				),
			),
			array(
				'conversions',
				array(
					'kind'  => 'monthly',
					'start' => $t['s'],
					'end'   => $t['e'],
				),
			),
			array(
				'ai-traffic',
				array(
					'start'      => $p['s'],
					'end'        => $p['e'],
					'prev_start' => $p['ps'],
					'prev_end'   => $p['pe'],
				),
			),
			array(
				'traffic',
				array(
					'start'      => $p['s'],
					'end'        => $p['e'],
					'prev_start' => $p['ps'],
					'prev_end'   => $p['pe'],
				),
			),
			array(
				'business-profile',
				array(
					'start' => min( $p['ps'], $t['s'] ),
					'end'   => $p['e'],
				),
			),
		);

		foreach ( $calls as $call ) {
			list( $id, $params ) = $call;
			if ( ! isset( $this->reports[ $id ] ) || ! $site->wants( $this->reports[ $id ]->section() ) ) {
				continue;
			}
			try {
				$this->reports[ $id ]->run( $site, array_merge( array( 'segment' => '' ), $params ) );
			} catch ( ApiException $e ) {
				// An expired sign-in would fail every remaining call; skip the rest of this site.
				if ( ApiException::RECONNECT === $e->reason() ) {
					return;
				}
			}
		}
	}
}