<?php

declare(strict_types=1);

namespace Domain\DTO;

use Domain\ValueObject\DocumentStatus;

// @responsibility: DTO für Pipeline-Dokument-Daten

final readonly class PipelineDocumentDTO
{
    public function __construct(
        public int $id,
        public int $pipelineId,
        public string $filename,
        public string $filepath,
        public string $mimeType,
        public int $fileSize,
        public DocumentStatus $status,
        public ?string $errorMessage,
        public int $chunkCount,
        public \DateTimeImmutable $createdAt,
        public ?\DateTimeImmutable $processedAt,
    ) {}

    /**
     * Create from database row.
     *
     * @param array<string, mixed> $row
     */
    public static function fromDatabaseRow(array $row): self
    {
        return new self(
            id: (int) $row['id'],
            pipelineId: (int) $row['pipeline_id'],
            filename: (string) $row['filename'],
            filepath: (string) $row['filepath'],
            mimeType: (string) ($row['mime_type'] ?? 'application/octet-stream'),
            fileSize: (int) ($row['file_size'] ?? 0),
            status: DocumentStatus::from((string) ($row['status'] ?? 'pending')),
            errorMessage: $row['error_message'] ?? null,
            chunkCount: (int) ($row['chunk_count'] ?? 0),
            createdAt: new \DateTimeImmutable($row['created_at'] ?? 'now'),
            processedAt: isset($row['processed_at']) ? new \DateTimeImmutable($row['processed_at']) : null,
        );
    }

    /**
     * Check if document can be reprocessed.
     */
    public function canReprocess(): bool
    {
        return $this->status->canReprocess();
    }

    /**
     * Check if document is currently processing.
     */
    public function isProcessing(): bool
    {
        return $this->status->isActive();
    }

    /**
     * Get file size in human-readable format.
     */
    public function fileSizeFormatted(): string
    {
        $units = ['B', 'KB', 'MB', 'GB'];
        $size = $this->fileSize;
        $unitIndex = 0;

        while ($size >= 1024 && $unitIndex < count($units) - 1) {
            $size /= 1024;
            $unitIndex++;
        }

        return round($size, 2) . ' ' . $units[$unitIndex];
    }
}