<?php

/**
 * Matomo - free/libre analytics platform
 *
 * @link    https://matomo.org
 * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */

namespace Piwik\Plugins\CoreAdminHome\Commands;

use Exception;
use Piwik\Archive\ArchiveInvalidator;
use Piwik\ArchiveProcessor\Rules;
use Piwik\Container\StaticContainer;
use Piwik\Period;
use Piwik\Period\Range;
use Piwik\Piwik;
use Piwik\Plugins\SegmentEditor\API;
use Piwik\Segment;
use Piwik\Plugin\ConsoleCommand;
use Piwik\Plugins\SitesManager\API as SitesManagerAPI;
use Piwik\Site;
use Piwik\Period\Factory as PeriodFactory;
use Piwik\Log\LoggerInterface;

/**
 * Provides a simple interface for invalidating report data by date ranges, site IDs and periods.
 */
class InvalidateReportData extends ConsoleCommand
{
    public const ALL_OPTION_VALUE = 'all';

    /**
     * @var null|array<Segment>
     */
    private $allSegments = null;

    /**
     * @var LoggerInterface
     */
    private $logger;

    /**
     * @var ArchiveInvalidator
     */
    private $invalidator;

    public function __construct()
    {
        parent::__construct();

        $this->logger = StaticContainer::get(LoggerInterface::class);
        $this->invalidator = StaticContainer::get(ArchiveInvalidator::class);
    }

    protected function configure()
    {
        $this->setName('core:invalidate-report-data');
        $this->setDescription('Invalidate archived report data by date range, site and period.');
        $this->addRequiredValueOption(
            'dates',
            null,
            'List of dates or date ranges to invalidate report data for, eg, 2015-01-03 or 2015-01-05,2015-02-12.',
            null,
            true
        );
        $this->addRequiredValueOption(
            'sites',
            null,
            'List of site IDs to invalidate report data for, eg, "1,2,3,4" or "all" for all sites.',
            self::ALL_OPTION_VALUE
        );
        $this->addRequiredValueOption(
            'periods',
            null,
            'List of period types to invalidate report data for. Can be one or more of the following values: day, '
            . 'week, month, year, range or "all" for all of them.',
            self::ALL_OPTION_VALUE
        );
        $this->addRequiredValueOption(
            'segment',
            null,
            'List of segments to invalidate report data for. This can be the segment string itself, the segment name from the UI or the ID of the segment.'
            . ' If specifying the segment definition, make sure it is encoded properly (it should be the same as the segment parameter in the URL).'
            . ' If no segment is provided, all segments (including all visits) will be invalidated. To specifically invalidate all visits --segment="" can be provided.',
            null,
            true
        );
        $this->addNoValueOption(
            'cascade',
            null,
            'If supplied, invalidation will cascade, invalidating child period types even if they aren\'t specified in'
            . ' --periods. For example, if --periods=week, --cascade will cause the days within those weeks to be '
            . 'invalidated as well. If --periods=month, then weeks and days will be invalidated. Note: if a period '
            . 'falls partly outside of a date range, then --cascade will also invalidate data for child periods '
            . 'outside the date range. For example, if --dates=2015-09-14,2015-09-15 & --periods=week, --cascade will'
            . ' also invalidate all days within 2015-09-13,2015-09-19, even those outside the date range.'
        );
        $this->addNoValueOption('dry-run', null, 'For tests. Runs the command w/o actually '
            . 'invalidating anything.');
        $this->addRequiredValueOption('plugin', null, 'To invalidate data for a specific plugin only.');
        $this->addNoValueOption(
            'ignore-log-deletion-limit',
            null,
            'Ignore the log purging limit when invalidating archives. If a date is older than the log purging threshold (which means '
            . 'there should be no log data for it), we normally skip invalidating it in order to prevent losing any report data. In some cases, '
            . 'however it is useful, if, for example, your site was imported from Google, and there is never any log data.'
        );
        $this->setHelp('Invalidate archived report data by date range, site and period. Invalidated archive data will '
            . 'be re-archived during the next core:archive run. If your log data has changed for some reason, this '
            . 'command can be used to make sure reports are generated using the new, changed log data.');
    }

    protected function doExecute(): int
    {
        $sites = $this->getSitesToInvalidateFor();
        $periodTypes = $this->getPeriodTypesToInvalidateFor();
        $dateRanges = $this->getDateRangesToInvalidateFor();
        $segments = $this->getSegmentsToInvalidateFor($sites);

        foreach ($periodTypes as $periodType) {
            if ($periodType === 'range') {
                $this->invalidateRangePeriods($dateRanges, $segments, $sites);
            } else {
                $this->invalidateNonRangePeriods($periodType, $dateRanges, $segments, $sites);
            }
        }

        return self::SUCCESS;
    }

    private function getSegmentsWithSitesToProcess(
        array $segments,
        array $sites,
        bool $ignoreInvalidSegments = false
    ): array {
        $segmentDetails = [];

        // check availability of provided segments for all sites
        foreach ($segments as $segmentStr) {
            // determine sites where current segment is available for
            $sitesToProcess = $this->getSitesForSegment($segmentStr, $sites);
            $segment = null;

            try {
                $segment = new Segment($segmentStr, $sitesToProcess);
            } catch (Exception $e) {
                if (!$ignoreInvalidSegments) {
                    throw $e;
                }
            }

            if (empty($sitesToProcess)) {
                // segment not available for any site
                $this->logger->info("Segment [$segmentStr] not available for any site, skipping it...");
                continue;
            }

            $sitesDiff = array_diff($sites, $sitesToProcess);

            if (count($sitesDiff)) {
                $this->logger->info(
                    "Segment [$segmentStr] not available for all sites, skipping this segment for sites [ "
                    . implode(', ', $sitesDiff) . " ]."
                );
            }

            $segmentDetails[$segmentStr] = [
                'segment' => $segment,
                'sites' => $sitesToProcess,
            ];
        }

        return $segmentDetails;
    }

    private function invalidateNonRangePeriods(
        string $periodType,
        array $dateRangesToInvalidate,
        array $segments,
        array $sites
    ): void {
        $ignoreLogDeletionLimit = $this->getInput()->getOption('ignore-log-deletion-limit');
        $cascade = $this->getInput()->getOption('cascade');
        $dryRun = $this->getInput()->getOption('dry-run');
        $plugin = $this->getInput()->getOption('plugin');

        foreach ($dateRangesToInvalidate as $dateRange) {
            foreach ($segments as $segmentStr => $segmentData) {
                $sitesToProcess = $segmentData['sites'];
                $segment = $segmentData['segment'];

                $this->logger->info("Invalidating $periodType periods in $dateRange for site = [ "
                    . implode(', ', $sitesToProcess) . " ], segment = [ $segmentStr ]...");

                $dates = $this->getPeriodDates($periodType, $dateRange);

                if ($dryRun) {
                    $message = "[Dry-run] invalidating archives for site = [ " . implode(', ', $sitesToProcess)
                        . " ], dates = [ " . implode(', ', $dates) . " ], period = [ $periodType ], segment = [ "
                        . "$segmentStr ], cascade = [ " . (int)$cascade . " ]";
                    if (!empty($plugin)) {
                        $message .= ", plugin = [ $plugin ]";
                    }
                    $this->logger->info($message);
                } else {
                    $invalidationResult = $this->invalidator->markArchivesAsInvalidated(
                        $sitesToProcess,
                        $dates,
                        $periodType,
                        $segment,
                        $cascade,
                        false,
                        $plugin,
                        $ignoreLogDeletionLimit
                    );

                    if ($this->getOutput()->getVerbosity() > $this->getOutput()::VERBOSITY_NORMAL) {
                        foreach ($invalidationResult->makeOutputLogs() as $outputLog) {
                            $this->logger->info($outputLog);
                        }
                    }
                }
            }
        }
    }

    private function invalidateRangePeriods(array $dateRangesToInvalidate, array $segments, array $sites): void
    {
        $dryRun = $this->getInput()->getOption('dry-run');
        $plugin = $this->getInput()->getOption('plugin');
        $periods = trim($this->getInput()->getOption('periods'));
        $isUsingAllOption = $periods === self::ALL_OPTION_VALUE;
        $rangeDates = [];

        foreach ($dateRangesToInvalidate as $dateRange) {
            if (
                $isUsingAllOption
                && !Period::isMultiplePeriod($dateRange, 'day')
            ) {
                continue; // not a range, nothing to do... only when "all" option is used
            }

            $rangeDates[] = $this->getPeriodDates('range', $dateRange);
        }

        if (!empty($rangeDates)) {
            foreach ($segments as $segmentStr => $segmentData) {
                $sitesToProcess = $segmentData['sites'];
                $segment = $segmentData['segment'];

                if ($dryRun) {
                    $dateRangeStr = implode(';', $dateRangesToInvalidate);
                    $this->logger->info("Invalidating range periods overlapping $dateRangeStr for "
                        . "site = [ " . implode(', ', $sitesToProcess) . " ], segment = [ $segmentStr ]...");
                } else {
                    $this->invalidator->markArchivesOverlappingRangeAsInvalidated($sitesToProcess, $rangeDates, $segment, $plugin);
                }
            }
        }
    }

    /**
     * Returns all sites where the given segment is available for
     */
    private function getSitesForSegment(string $segmentStr, array $idSites): array
    {
        $sitesToProcess = [];

        foreach ($idSites as $idSite) {
            try {
                $segment = new Segment($segmentStr, $idSite);
                $sitesToProcess[] = $idSite;
            } catch (Exception $e) {
                continue;
            }
        }

        return $sitesToProcess;
    }

    /**
     * Parses, validates and returns the provided list of site ids
     */
    private function getSitesToInvalidateFor(): array
    {
        $sites = $this->getInput()->getOption('sites');

        $siteIds = Site::getIdSitesFromIdSitesString($sites);
        if (empty($siteIds)) {
            throw new \InvalidArgumentException("Invalid --sites value: '$sites'.");
        }

        $allSiteIds = SitesManagerAPI::getInstance()->getAllSitesId();
        foreach ($siteIds as $idSite) {
            if (!in_array($idSite, $allSiteIds)) {
                throw new \InvalidArgumentException("Invalid --sites value: '$sites', there are no sites with IDs = $idSite");
            }
        }

        return $siteIds;
    }

    /**
     * Parses, validates and returns the provided list of period types
     * If 'all' is provided, this will be converted to a list of all period types
     */
    private function getPeriodTypesToInvalidateFor(): array
    {
        $periods = $this->getInput()->getOption('periods');
        if (empty($periods)) {
            throw new \InvalidArgumentException("The --periods argument is required.");
        }

        if ($periods == self::ALL_OPTION_VALUE) {
            $result = array_keys(Piwik::$idPeriods);
            return $result;
        }

        $periods = explode(',', $periods);
        $periods = array_map('trim', $periods);

        foreach ($periods as $periodIdentifier) {
            if (!isset(Piwik::$idPeriods[$periodIdentifier])) {
                throw new \InvalidArgumentException("Invalid period type '$periodIdentifier' supplied in --periods.");
            }
        }

        return $periods;
    }

    /**
     * Returns the list of provided dates / date ranges
     */
    private function getDateRangesToInvalidateFor(): array
    {
        $dateRanges = $this->getInput()->getOption('dates');
        if (empty($dateRanges)) {
            throw new \InvalidArgumentException("The --dates option is required.");
        }

        return is_array($dateRanges) ? $dateRanges : [$dateRanges];
    }

    private function getPeriodDates($periodType, $dateRange)
    {
        if (!isset(Piwik::$idPeriods[$periodType])) {
            throw new \InvalidArgumentException("Invalid period type '$periodType'.");
        }

        try {
            $period = PeriodFactory::build($periodType, $dateRange);
        } catch (\Exception $ex) {
            throw new \InvalidArgumentException("Invalid date or date range specifier '$dateRange'", $code = 0, $ex);
        }

        $result = [];
        if ($periodType === 'range') {
            $result[] = $period->getDateStart();
            $result[] = $period->getDateEnd();
        } elseif ($period instanceof Range) {
            foreach ($period->getSubperiods() as $subperiod) {
                $result[] = $subperiod->getDateStart();
            }
        } else {
            $result[] = $period->getDateStart();
        }
        return $result;
    }

    /**
     * Parses, validates and returns the list of segments that can be invalidated for the provided sites
     * If no segment is provided, a list of all segments available for the provided sites will be returned (including all visits segment)
     *
     * @param array<int> $idSites
     *
     * @return array<string>
     */
    private function getSegmentsToInvalidateFor(array $idSites): array
    {
        $input = $this->getInput();
        $segments = $input->getOption('segment');
        $segments = array_map('trim', $segments);
        $segments = array_unique($segments);

        if (empty($segments)) {
            $this->logger->debug("No segment provided. Invalidating all stored segments.");
            $segments = Rules::getSegmentsToProcess($idSites);
            array_unshift($segments, "");
            return $this->getSegmentsWithSitesToProcess($segments, $idSites, true);
        }

        $result = [];

        foreach ($segments as $segmentOptionValue) {
            if ($segmentOptionValue === "") {
                $result[] = "";
                continue;
            }

            $segmentDefinition = $this->findSegment($segmentOptionValue, $idSites);

            if (empty($segmentDefinition)) {
                continue;
            }

            $result[] = $segmentDefinition;
        }

        return $this->getSegmentsWithSitesToProcess($result, $idSites);
    }

    /**
     * @param array<int> $idSites
     */
    private function findSegment(string $segmentOptionValue, array $idSites)
    {
        $allSegments = $this->getAllSegments($idSites);

        foreach ($allSegments as $segment) {
            if (
                !empty($segment['enable_only_idsite'])
                && !in_array($segment['enable_only_idsite'], $idSites)
            ) {
                continue;
            }

            if ($segmentOptionValue == $segment['idsegment']) {
                $this->logger->debug("Matching '$segmentOptionValue' by idsegment with segment {segment}.", ['segment' => json_encode($segment)]);
                return $segment['definition'];
            }

            if (strtolower($segmentOptionValue) == strtolower($segment['name'])) {
                $this->logger->debug("Matching '$segmentOptionValue' by name with segment {segment}.", ['segment' => json_encode($segment)]);
                return $segment['definition'];
            }

            if (
                $segment['definition'] == $segmentOptionValue
                || $segment['definition'] == urldecode($segmentOptionValue)
            ) {
                $this->logger->debug("Matching '{value}' by definition with segment {segment}.", ['value' => $segmentOptionValue, 'segment' => json_encode($segment)]);
                return $segment['definition'];
            }
        }

        $this->logger->warning("'$segmentOptionValue' did not match any stored segment, but invalidating it anyway.");
        return $segmentOptionValue;
    }

    /**
     * @param array<int> $idSites
     *
     * @return array<Segment>
     */
    private function getAllSegments(array $idSites): array
    {
        if ($this->allSegments === null) {
            $segmentsByDefinition = [];

            if ([] === $idSites) {
                $idSites = [null];
            }

            foreach ($idSites as $idSite) {
                $siteSegments = API::getInstance()->getAll($idSite);

                $siteSegmentsByDefinition = array_combine(
                    array_column($siteSegments, 'definition'),
                    $siteSegments
                );

                $segmentsByDefinition = array_merge(
                    $segmentsByDefinition,
                    $siteSegmentsByDefinition
                );
            }

            $this->allSegments = array_values($segmentsByDefinition);
        }

        return $this->allSegments;
    }
}