<?php

namespace MediaWiki\Extension\AbuseFilter\View;

use AbuseFilterChangesList;
use ActorMigration;
use HTMLForm;
use IContextSource;
use MediaWiki\Extension\AbuseFilter\AbuseFilterPermissionManager;
use MediaWiki\Extension\AbuseFilter\EditBoxBuilderFactory;
use MediaWiki\Extension\AbuseFilter\Parser\ParserFactory as AfParserFactory;
use MediaWiki\Extension\AbuseFilter\VariableGenerator\RCVariableGenerator;
use MediaWiki\Extension\AbuseFilter\Variables\VariableHolder;
use MediaWiki\Linker\LinkRenderer;
use RecentChange;
use Title;
use User;
use Xml;

class AbuseFilterViewTestBatch extends AbuseFilterView {
	/**
	 * @var int The limit of changes to test, hard coded for now
	 */
	protected static $mChangeLimit = 100;

	/**
	 * @var bool Whether to show changes that don't trigger the specified pattern
	 */
	public $mShowNegative;
	/**
	 * @var string The start time of the lookup period
	 */
	public $mTestPeriodStart;
	/**
	 * @var string The end time of the lookup period
	 */
	public $mTestPeriodEnd;
	/**
	 * @var string The page of which edits we're interested in
	 */
	public $mTestPage;
	/**
	 * @var string The user whose actions we want to test
	 */
	public $mTestUser;
	/**
	 * @var bool Whether to exclude bot edits
	 */
	public $mExcludeBots;
	/**
	 * @var string The action (performed by the user) we want to search for
	 */
	public $mTestAction;
	/**
	 * @var string The text of the rule to test changes against
	 */
	private $testPattern;
	/**
	 * @var EditBoxBuilderFactory
	 */
	private $boxBuilderFactory;
	/**
	 * @var AfParserFactory
	 */
	private $parserFactory;

	/**
	 * @param AbuseFilterPermissionManager $afPermManager
	 * @param EditBoxBuilderFactory $boxBuilderFactory
	 * @param AfParserFactory $parserFactory
	 * @param IContextSource $context
	 * @param LinkRenderer $linkRenderer
	 * @param string $basePageName
	 * @param array $params
	 */
	public function __construct(
		AbuseFilterPermissionManager $afPermManager,
		EditBoxBuilderFactory $boxBuilderFactory,
		AfParserFactory $parserFactory,
		IContextSource $context,
		LinkRenderer $linkRenderer,
		string $basePageName,
		array $params
	) {
		parent::__construct( $afPermManager, $context, $linkRenderer, $basePageName, $params );
		$this->boxBuilderFactory = $boxBuilderFactory;
		$this->parserFactory = $parserFactory;
	}

	/**
	 * Shows the page
	 */
	public function show() {
		$out = $this->getOutput();

		if ( !$this->afPermManager->canViewPrivateFilters( $this->getUser() ) ) {
			$out->addWikiMsg( 'abusefilter-mustviewprivateoredit' );
			return;
		}

		$this->loadParameters();

		$out->setPageTitle( $this->msg( 'abusefilter-test' ) );
		$out->addHelpLink( 'Extension:AbuseFilter/Rules format' );
		$out->addWikiMsg( 'abusefilter-test-intro', self::$mChangeLimit );
		$out->enableOOUI();

		$boxBuilder = $this->boxBuilderFactory->newEditBoxBuilder( $this, $this->getUser(), $out );

		$output = '';
		$output .=
			$boxBuilder->buildEditBox(
				$this->testPattern,
				true,
				true,
				false
			) . "\n";

		$output .= $this->buildFilterLoader();
		$output = Xml::tags( 'div', [ 'id' => 'mw-abusefilter-test-editor' ], $output );

		$RCMaxAge = $this->getConfig()->get( 'RCMaxAge' );
		$min = wfTimestamp( TS_ISO_8601, time() - $RCMaxAge );
		$max = wfTimestampNow();

		// Search form
		$formFields = [];
		$formFields['wpTestAction'] = [
			'name' => 'wpTestAction',
			'type' => 'select',
			'label-message' => 'abusefilter-test-action',
			'options' => [
				$this->msg( 'abusefilter-test-search-type-all' )->text() => 0,
				$this->msg( 'abusefilter-test-search-type-edit' )->text() => 'edit',
				$this->msg( 'abusefilter-test-search-type-move' )->text() => 'move',
				$this->msg( 'abusefilter-test-search-type-delete' )->text() => 'delete',
				$this->msg( 'abusefilter-test-search-type-createaccount' )->text() => 'createaccount',
				$this->msg( 'abusefilter-test-search-type-upload' )->text() => 'upload'
			]
		];
		$formFields['wpTestUser'] = [
			'name' => 'wpTestUser',
			'type' => 'user',
			'ipallowed' => true,
			'label-message' => 'abusefilter-test-user',
			'default' => $this->mTestUser
		];
		$formFields['wpExcludeBots'] = [
			'name' => 'wpExcludeBots',
			'type' => 'check',
			'label-message' => 'abusefilter-test-nobots',
			'default' => $this->mExcludeBots
		];
		$formFields['wpTestPeriodStart'] = [
			'name' => 'wpTestPeriodStart',
			'type' => 'datetime',
			'label-message' => 'abusefilter-test-period-start',
			'default' => $this->mTestPeriodStart,
			'min' => $min,
			'max' => $max
		];
		$formFields['wpTestPeriodEnd'] = [
			'name' => 'wpTestPeriodEnd',
			'type' => 'datetime',
			'label-message' => 'abusefilter-test-period-end',
			'default' => $this->mTestPeriodEnd,
			'min' => $min,
			'max' => $max
		];
		$formFields['wpTestPage'] = [
			'name' => 'wpTestPage',
			'type' => 'title',
			'label-message' => 'abusefilter-test-page',
			'default' => $this->mTestPage,
			'creatable' => true,
			'required' => false
		];
		$formFields['wpShowNegative'] = [
			'name' => 'wpShowNegative',
			'type' => 'check',
			'label-message' => 'abusefilter-test-shownegative',
			'selected' => $this->mShowNegative
		];

		$htmlForm = HTMLForm::factory( 'ooui', $formFields, $this->getContext() )
			->addHiddenField( 'title', $this->getTitle( 'test' )->getPrefixedDBkey() )
			->setId( 'wpFilterForm' )
			->setWrapperLegendMsg( 'abusefilter-list-options' )
			->setAction( $this->getTitle( 'test' )->getLocalURL() )
			->setSubmitTextMsg( 'abusefilter-test-submit' )
			->setMethod( 'post' )
			->prepareForm()
			->getHTML( true );

		$output = Xml::fieldset( $this->msg( 'abusefilter-test-legend' )->text(), $output . $htmlForm );
		$out->addHTML( $output );

		if ( $this->getRequest()->wasPosted() ) {
			$this->doTest();
		}
	}

	/**
	 * Loads the revisions and checks the given syntax against them
	 */
	public function doTest() {
		// Quick syntax check.
		$out = $this->getOutput();
		$parser = $this->parserFactory->newParser();

		if ( $parser->checkSyntax( $this->testPattern )->getResult() !== true ) {
			$out->addWikiMsg( 'abusefilter-test-syntaxerr' );
			return;
		}
		$dbr = wfGetDB( DB_REPLICA );

		$conds = [];

		if ( (string)$this->mTestUser !== '' ) {
			$conds[] = ActorMigration::newMigration()->getWhere(
				$dbr, 'rc_user', User::newFromName( $this->mTestUser, false )
			)['conds'];
		}

		if ( $this->mTestPeriodStart ) {
			$conds[] = 'rc_timestamp >= ' .
				$dbr->addQuotes( $dbr->timestamp( strtotime( $this->mTestPeriodStart ) ) );
		}
		if ( $this->mTestPeriodEnd ) {
			$conds[] = 'rc_timestamp <= ' .
				$dbr->addQuotes( $dbr->timestamp( strtotime( $this->mTestPeriodEnd ) ) );
		}
		if ( $this->mTestPage ) {
			$title = Title::newFromText( $this->mTestPage );
			if ( $title instanceof Title ) {
				$conds['rc_namespace'] = $title->getNamespace();
				$conds['rc_title'] = $title->getDBkey();
			} else {
				$out->addWikiMsg( 'abusefilter-test-badtitle' );
				return;
			}
		}

		if ( $this->mExcludeBots ) {
			$conds['rc_bot'] = 0;
		}

		$action = $this->mTestAction !== '0' ? $this->mTestAction : false;
		$conds[] = $this->buildTestConditions( $dbr, $action );

		// Get our ChangesList
		$changesList = new AbuseFilterChangesList( $this->getSkin(), $this->testPattern );
		$output = $changesList->beginRecentChangesList();

		$rcQuery = RecentChange::getQueryInfo();
		$res = $dbr->select(
			$rcQuery['tables'],
			$rcQuery['fields'],
			$conds,
			__METHOD__,
			[ 'LIMIT' => self::$mChangeLimit, 'ORDER BY' => 'rc_timestamp desc' ],
			$rcQuery['joins']
		);

		$counter = 1;

		$contextUser = $this->getUser();
		$parser->toggleConditionLimit( false );
		foreach ( $res as $row ) {
			$vars = new VariableHolder();
			$rc = RecentChange::newFromRow( $row );
			$varGenerator = new RCVariableGenerator( $vars, $rc, $contextUser );
			$vars = $varGenerator->getVars();

			if ( !$vars ) {
				continue;
			}

			$parser->setVariables( $vars );
			$result = $parser->checkConditions( $this->testPattern )->getResult();

			if ( $result || $this->mShowNegative ) {
				// Stash result in RC item
				// @phan-suppress-next-line PhanUndeclaredProperty not a big deal
				$rc->filterResult = $result;
				$rc->counter = $counter++;
				$output .= $changesList->recentChangesLine( $rc, false );
			}
		}

		$output .= $changesList->endRecentChangesList();

		$out->addHTML( $output );
	}

	/**
	 * Loads parameters from request
	 */
	public function loadParameters() {
		$request = $this->getRequest();

		$this->testPattern = $request->getText( 'wpFilterRules' );
		$this->mShowNegative = $request->getBool( 'wpShowNegative' );
		$testUsername = $request->getText( 'wpTestUser' );
		$this->mTestPeriodEnd = $request->getText( 'wpTestPeriodEnd' );
		$this->mTestPeriodStart = $request->getText( 'wpTestPeriodStart' );
		$this->mTestPage = $request->getText( 'wpTestPage' );
		$this->mExcludeBots = $request->getBool( 'wpExcludeBots' );
		$this->mTestAction = $request->getText( 'wpTestAction' );

		if ( !$this->testPattern
			&& count( $this->mParams ) > 1
			&& is_numeric( $this->mParams[1] )
		) {
			$dbr = wfGetDB( DB_REPLICA );
			$this->testPattern = $dbr->selectField( 'abuse_filter',
				'af_pattern',
				[ 'af_id' => $this->mParams[1] ],
				__METHOD__
			);
		}

		// Normalise username
		$userTitle = Title::newFromText( $testUsername, NS_USER );
		$this->mTestUser = $userTitle ? $userTitle->getText() : null;
	}
}