<?php

declare(strict_types=1);

namespace Doctrine\Migrations;

use Doctrine\DBAL\Connection;
use Doctrine\DBAL\Exception as DBALException;
use Doctrine\DBAL\Platforms\AbstractPlatform;
use Doctrine\DBAL\Schema\AbstractSchemaManager;
use Doctrine\DBAL\Schema\Schema;
use Doctrine\Migrations\Exception\AbortMigration;
use Doctrine\Migrations\Exception\FrozenMigration;
use Doctrine\Migrations\Exception\IrreversibleMigration;
use Doctrine\Migrations\Exception\MigrationException;
use Doctrine\Migrations\Exception\SkipMigration;
use Doctrine\Migrations\Query\Query;
use Psr\Log\LoggerInterface;

use function sprintf;

/**
 * The AbstractMigration class is for end users to extend from when creating migrations. Extend this class
 * and implement the required up() and down() methods.
 */
abstract class AbstractMigration
{
    /** @var Connection */
    protected $connection;

    /** @var AbstractSchemaManager<AbstractPlatform> */
    protected $sm;

    /** @var AbstractPlatform */
    protected $platform;

    /** @var Query[] */
    private array $plannedSql = [];

    private bool $frozen = false;

    public function __construct(Connection $connection, private readonly LoggerInterface $logger)
    {
        $this->connection = $connection;
        $this->sm         = $this->connection->createSchemaManager();
        $this->platform   = $this->connection->getDatabasePlatform();
    }

    /**
     * Indicates the transactional mode of this migration.
     *
     * If this function returns true (default) the migration will be executed
     * in one transaction, otherwise non-transactional state will be used to
     * execute each of the migration SQLs.
     *
     * Extending class should override this function to alter the return value.
     */
    public function isTransactional(): bool
    {
        return true;
    }

    public function getDescription(): string
    {
        return '';
    }

    public function warnIf(bool $condition, string $message = 'Unknown Reason'): void
    {
        if (! $condition) {
            return;
        }

        $this->logger->warning($message, ['migration' => $this]);
    }

    /** @throws AbortMigration */
    public function abortIf(bool $condition, string $message = 'Unknown Reason'): void
    {
        if ($condition) {
            throw new AbortMigration($message);
        }
    }

    /** @throws SkipMigration */
    public function skipIf(bool $condition, string $message = 'Unknown Reason'): void
    {
        if ($condition) {
            throw new SkipMigration($message);
        }
    }

    /** @throws MigrationException|DBALException */
    public function preUp(Schema $schema): void
    {
    }

    /** @throws MigrationException|DBALException */
    public function postUp(Schema $schema): void
    {
    }

    /** @throws MigrationException|DBALException */
    public function preDown(Schema $schema): void
    {
    }

    /** @throws MigrationException|DBALException */
    public function postDown(Schema $schema): void
    {
    }

    /** @throws MigrationException|DBALException */
    abstract public function up(Schema $schema): void;

    /** @throws MigrationException|DBALException */
    public function down(Schema $schema): void
    {
        $this->abortIf(true, sprintf('No down() migration implemented for "%s"', static::class));
    }

    /**
     * @param mixed[] $params
     * @param mixed[] $types
     */
    protected function addSql(
        string $sql,
        array $params = [],
        array $types = [],
    ): void {
        if ($this->frozen) {
            throw FrozenMigration::new();
        }

        $this->plannedSql[] = new Query($sql, $params, $types);
    }

    /** @return Query[] */
    public function getSql(): array
    {
        return $this->plannedSql;
    }

    public function freeze(): void
    {
        $this->frozen = true;
    }

    protected function write(string $message): void
    {
        $this->logger->notice($message, ['migration' => $this]);
    }

    /** @throws IrreversibleMigration */
    protected function throwIrreversibleMigrationException(string|null $message = null): void
    {
        if ($message === null) {
            $message = 'This migration is irreversible and cannot be reverted.';
        }

        throw new IrreversibleMigration($message);
    }
}