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<?php

namespace Mautic\PluginBundle\Bundle;

use Doctrine\DBAL\Schema\Comparator;
use Doctrine\DBAL\Schema\Schema;
use Doctrine\ORM\Tools\SchemaTool;
use Mautic\CoreBundle\Factory\MauticFactory;
use Mautic\PluginBundle\Entity\Plugin;
use Symfony\Component\HttpKernel\Bundle\Bundle;

/**
 * Base Bundle class which should be extended by addon bundles.
 */
abstract class PluginBundleBase extends Bundle
{
    /**
     * @throws \Exception
     *
     * @deprecated To be removed in 5.0. Listen to PluginEvents::ON_PLUGIN_INSTALL instead
     */
    public static function onPluginInstall(Plugin $plugin, MauticFactory $factory, $metadata = null, $installedSchema = null): void
    {
        if (null !== $metadata) {
            self::installPluginSchema($metadata, $factory, $installedSchema);
        }
    }

    /**
     * Install plugin schema based on Doctrine metadata.
     *
     * @throws \Exception
     */
    public static function installPluginSchema(array $metadata, MauticFactory $factory, $installedSchema = null): void
    {
        if (null !== $installedSchema) {
            // Schema already exists, so no need to proceed
            return;
        }

        $db             = $factory->getDatabase();
        $schemaTool     = new SchemaTool($factory->getEntityManager());
        $installQueries = $schemaTool->getCreateSchemaSql($metadata);

        foreach ($installQueries as $q) {
            // Check if the query is a DDL statement
            if (self::isDDLStatement($q)) {
                // Execute DDL statements outside of a transaction
                $db->executeQuery($q);
            } else {
                // For non-DDL statements, use transactions
                try {
                    $db->beginTransaction();
                    $db->executeQuery($q);
                    $db->commit();
                } catch (\Exception $e) {
                    // Rollback only for non-DDL statements
                    if ($db->isTransactionActive()) {
                        $db->rollBack();
                    }
                    throw $e;
                }
            }
        }
    }

    private static function isDDLStatement(string $query): bool|int
    {
        return preg_match('/^(CREATE|ALTER|DROP|RENAME|TRUNCATE|COMMENT)\s/i', $query);
    }

    /**
     * Called by PluginController::reloadAction when the addon version does not match what's installed.
     *
     * @throws \Exception
     *
     * @deprecated To be removed in 5.0. Listen to PluginEvents::ON_PLUGIN_UPDATE instead
     */
    public static function onPluginUpdate(
        Plugin $plugin,
        MauticFactory $factory,
        $metadata = null,
        Schema $installedSchema = null
    ): void {
        // Not recommended although availalbe for simple schema changes - see updatePluginSchema docblock
        // self::updatePluginSchema($metadata, $installedSchema, $factory);
    }

    /**
     * Update plugin schema based on Doctrine metadata.
     *
     * WARNING - this is not recommended as Doctrine does not guarantee results. There is a risk
     * that Doctrine will generate an incorrect query leading to lost data. If using this method,
     * be sure to thoroughly test the queries Doctrine generates
     *
     * @throws \Doctrine\DBAL\ConnectionException
     * @throws \Exception
     */
    public static function updatePluginSchema(array $metadata, Schema $installedSchema, MauticFactory $factory): void
    {
        $db               = $factory->getDatabase();
        $schemaTool       = new SchemaTool($factory->getEntityManager());
        $toSchema         = $schemaTool->getSchemaFromMetadata($metadata);
        $comparator       = (new Comparator())->compareSchemas($installedSchema, $toSchema);
        $databasePlatform = $db->getDatabasePlatform();
        $queries          = $databasePlatform->getAlterSchemaSQL($comparator);

        $db->beginTransaction();
        try {
            foreach ($queries as $q) {
                $db->executeQuery($q);
            }

            $db->commit();
        } catch (\Exception $e) {
            $db->rollback();

            throw $e;
        }
    }

    /**
     * Not used yet :-).
     */
    public static function onPluginUninstall(Plugin $plugin, MauticFactory $factory, $metadata = null): void
    {
    }

    /**
     * Drops plugin's tables based on Doctrine metadata.
     *
     * @throws \Doctrine\DBAL\ConnectionException
     * @throws \Exception
     */
    public static function dropPluginSchema(array $metadata, MauticFactory $factory): void
    {
        $db          = $factory->getDatabase();
        $schemaTool  = new SchemaTool($factory->getEntityManager());
        $dropQueries = $schemaTool->getDropSchemaSQL($metadata);

        $db->beginTransaction();
        try {
            foreach ($dropQueries as $q) {
                $db->executeQuery($q);
            }

            $db->commit();
        } catch (\Exception $e) {
            $db->rollback();

            throw $e;
        }
    }
}