/**
 * File detection and processing types for unified file handling
 */
/**
 * Supported file types for multimodal input
 */
export type FileType = "csv" | "image" | "pdf" | "audio" | "video" | "archive" | "text" | "svg" | "docx" | "pptx" | "xlsx" | "unknown";
/**
 * Office document types
 */
export type OfficeDocumentType = "docx" | "pptx" | "xlsx";
/**
 * File with metadata — allows callers to pass filename alongside a Buffer.
 *
 * This is the recommended way for applications (e.g. Slack bots) to pass
 * files that were downloaded as Buffers but still have original filenames.
 *
 * @example
 * ```typescript
 * files: [
 *   { buffer: pdfBuffer, filename: "quarterly-report.pdf" },
 *   { buffer: videoBuffer, filename: "meeting-recording.mov", mimetype: "video/quicktime" }
 * ]
 * ```
 */
export type FileWithMetadata = {
    buffer: Buffer;
    filename: string;
    mimetype?: string;
};
/**
 * File input can be Buffer, string (path/URL/data URI), or an object with metadata.
 */
export type FileInput = Buffer | string | FileWithMetadata;
/**
 * File source type for tracking input origin
 */
export type FileSource = "url" | "path" | "buffer" | "datauri";
/**
 * File detection result with confidence scoring
 */
export type FileDetectionResult = {
    type: FileType;
    mimeType: string;
    extension: string | null;
    source: FileSource;
    metadata: {
        size?: number;
        filename?: string;
        confidence: number;
    };
};
/**
 * File processing result after detection and conversion
 */
export type FileProcessingResult = {
    type: FileType;
    content: string | Buffer;
    mimeType: string;
    /** Additional images extracted from the file (e.g., video keyframes, audio cover art) */
    images?: Array<Buffer | string>;
    metadata: {
        confidence: number;
        size?: number;
        filename?: string;
        extension?: string | null;
        rowCount?: number;
        totalLines?: number;
        columnCount?: number;
        columnNames?: string[];
        sampleData?: string | unknown[];
        hasEmptyColumns?: boolean;
        /** Enhanced column metadata with type detection and statistics */
        columnMetadata?: CSVColumnMetadata[];
        /** Data quality warnings */
        dataQualityWarnings?: CSVDataQualityWarning[];
        /** Overall data quality score (0-100) */
        dataQualityScore?: number;
        /** Whether headers were detected */
        hasHeaders?: boolean;
        /** Detected delimiter */
        detectedDelimiter?: string;
        version?: string;
        estimatedPages?: number | null;
        provider?: string;
        apiType?: PDFAPIType;
        officeFormat?: OfficeDocumentType;
        pageCount?: number;
        slideCount?: number;
        sheetCount?: number;
        sheetNames?: string[];
        author?: string;
        createdDate?: string;
        modifiedDate?: string;
        hasFormulas?: boolean;
        hasImages?: boolean;
        frameCount?: number;
        hasKeyframes?: boolean;
    };
};
/**
 * Sample data format options for CSV metadata
 * - 'json': JSON string representation (default, backward compatible)
 * - 'object': Structured array of row objects (best for programmatic use)
 * - 'csv': CSV formatted string preview
 * - 'markdown': Markdown table format
 */
export type SampleDataFormat = "object" | "json" | "csv" | "markdown";
/**
 * Detected data type for a CSV column
 */
export type CSVColumnDataType = "string" | "number" | "integer" | "float" | "boolean" | "date" | "datetime" | "email" | "url" | "empty" | "mixed";
/**
 * Data quality warning for CSV columns
 */
export type CSVDataQualityWarning = {
    column: string;
    type: "empty_values" | "invalid_name" | "mixed_types" | "high_null_rate" | "duplicates" | "inconsistent_format";
    message: string;
    severity: "info" | "warning" | "error";
    affectedRows?: number;
};
/**
 * Rich metadata for a single CSV column
 */
export type CSVColumnMetadata = {
    name: string;
    index: number;
    detectedType: CSVColumnDataType;
    /** Confidence of type detection (0-100) */
    typeConfidence: number;
    /** Count of null/empty values */
    nullCount: number;
    /** Count of unique values */
    uniqueCount: number;
    /** Sample values from this column (up to 5) */
    sampleValues: string[];
    /** For numeric columns: min value */
    minValue?: number;
    /** For numeric columns: max value */
    maxValue?: number;
    /** For numeric columns: average value */
    avgValue?: number;
    /** For date columns: detected format (e.g., 'YYYY-MM-DD', 'MM/DD/YYYY') */
    dateFormat?: string;
    /** Column name validation issues */
    nameIssues?: string[];
};
/**
 * CSV processor options
 */
export type CSVProcessorOptions = {
    maxRows?: number;
    formatStyle?: "raw" | "markdown" | "json";
    includeHeaders?: boolean;
    sampleDataFormat?: SampleDataFormat;
    extension?: string | null;
};
/**
 * PDF API types for different providers
 */
export type PDFAPIType = "document" | "files-api" | "unsupported";
/**
 * PDF provider configuration
 */
export type PDFProviderConfig = {
    maxSizeMB: number;
    maxPages: number;
    supportsNative: boolean;
    requiresCitations: boolean | "auto";
    apiType: PDFAPIType;
};
/**
 * PDF processor options
 */
export type PDFProcessorOptions = {
    provider?: string;
    model?: string;
    maxSizeMB?: number;
    bedrockApiMode?: "converse" | "invokeModel";
    /**
     * Whether to enforce page limits by throwing an error (default: true)
     * Set to false to bypass limit enforcement (logs warning instead)
     */
    enforceLimits?: boolean;
};
/**
 * Audio provider configuration for transcription services
 *
 * Describes the capabilities and limitations of each audio transcription provider
 * (e.g., OpenAI Whisper, Google Speech-to-Text, Azure Speech Services).
 *
 * @example OpenAI Whisper configuration
 * ```typescript
 * const openaiConfig: AudioProviderConfig = {
 *   maxSizeMB: 25,
 *   maxDurationSeconds: 600,
 *   supportedFormats: ['mp3', 'mp4', 'm4a', 'wav', 'webm'],
 *   supportsLanguageDetection: true,
 *   requiresApiKey: true,
 *   costPer60s: 0.006  // $0.006 per minute
 * };
 * ```
 *
 * @example Google Speech-to-Text configuration
 * ```typescript
 * const googleConfig: AudioProviderConfig = {
 *   maxSizeMB: 10,
 *   maxDurationSeconds: 480,
 *   supportedFormats: ['flac', 'wav', 'mp3', 'ogg'],
 *   supportsLanguageDetection: true,
 *   requiresApiKey: true,
 *   costPer15s: 0.004  // $0.016 per minute ($0.004 per 15 seconds)
 * };
 * ```
 */
export type AudioProviderConfig = {
    /** Maximum audio file size in megabytes */
    maxSizeMB: number;
    /** Maximum audio duration in seconds */
    maxDurationSeconds: number;
    /** Supported audio formats (e.g., 'mp3', 'wav', 'm4a', 'flac', 'ogg') */
    supportedFormats: string[];
    /** Whether the provider supports automatic language detection */
    supportsLanguageDetection: boolean;
    /** Whether the provider requires an API key for authentication */
    requiresApiKey: boolean;
    /** Optional: Cost per 60 seconds of audio in USD */
    costPer60s?: number;
    /** Optional: Cost per 15 seconds of audio in USD */
    costPer15s?: number;
};
/**
 * Audio processor options
 */
export type AudioProcessorOptions = {
    /** AI provider to use for transcription (e.g., 'openai', 'google', 'azure') */
    provider?: string;
    /** Transcription model to use (e.g., 'whisper-1', 'chirp-3') */
    transcriptionModel?: string;
    /** Language code for transcription (e.g., 'en', 'es', 'fr') */
    language?: string;
    /** Context or prompt to guide transcription accuracy */
    prompt?: string;
    /** Maximum audio duration in seconds (default: 600) */
    maxDurationSeconds?: number;
    /** Maximum file size in megabytes */
    maxSizeMB?: number;
};
/**
 * Office processor options for Word, PowerPoint, and Excel documents
 *
 * @example Word document processing (docx)
 * ```typescript
 * const options: OfficeProcessorOptions = {
 *   format: "docx",
 *   extractTextOnly: false,
 *   includeMetadata: true
 * };
 * ```
 *
 * @example PowerPoint processing (pptx)
 * ```typescript
 * const options: OfficeProcessorOptions = {
 *   format: "pptx",
 *   includeSlideNotes: true,  // pptx-specific
 *   includeMetadata: true
 * };
 * ```
 *
 * @example Excel processing (xlsx)
 * ```typescript
 * const options: OfficeProcessorOptions = {
 *   format: "xlsx",
 *   processAllSheets: true,   // xlsx-specific
 *   includeMetadata: true
 * };
 * ```
 */
export type OfficeProcessorOptions = {
    /** Office document format type */
    format?: OfficeDocumentType;
    /** Whether to extract text only (true) or preserve formatting (false). Applies to: docx, pptx, xlsx */
    extractTextOnly?: boolean;
    /** Maximum file size in megabytes. Applies to: docx, pptx, xlsx */
    maxSizeMB?: number;
    /** Whether to include metadata (author, created date, etc.). Applies to: docx, pptx, xlsx */
    includeMetadata?: boolean;
    /** For spreadsheets (xlsx only): whether to process all sheets or just the first */
    processAllSheets?: boolean;
    /** For presentations (pptx only): whether to include slide notes */
    includeSlideNotes?: boolean;
};
/**
 * File detector options
 */
export type FileDetectorOptions = {
    maxSize?: number;
    timeout?: number;
    allowedTypes?: FileType[];
    audioOptions?: AudioProcessorOptions;
    csvOptions?: CSVProcessorOptions;
    officeOptions?: OfficeProcessorOptions;
    confidenceThreshold?: number;
    provider?: string;
    /** Maximum number of retry attempts for network requests (default: 3) */
    maxRetries?: number;
    /** Initial retry delay in milliseconds with exponential backoff (default: 1000) */
    retryDelay?: number;
    /**
     * Caller-provided MIME type hint (e.g. "text/plain", "application/json").
     * Used when the filename has no extension and magic-byte detection cannot
     * identify the content — the common Slack/Curator extension-less-buffer
     * case. When set to a trustworthy mimetype (not "application/octet-stream"),
     * it short-circuits the detection strategy loop with a high-confidence
     * result so small files on the eager file-processing path still honor the
     * hint (the lazy FileReferenceRegistry path has its own hint-handling).
     */
    mimetypeHint?: string;
};
/**
 * Google AI Studio Files API types
 */
export type GoogleFilesAPIUploadResult = {
    file: {
        name: string;
        displayName: string;
        mimeType: string;
        sizeBytes: string;
        createTime: string;
        updateTime: string;
        expirationTime: string;
        sha256Hash: string;
        uri: string;
    };
};
/** Options for converting PDF pages to images. */
export type PDFImageConversionOptions = {
    /** Scale factor for image quality (1-4, default: 2) */
    scale?: number;
    /** Maximum number of pages to convert (default: 20 from PDF_LIMITS.DEFAULT_MAX_PAGES) */
    maxPages?: number;
    /** Output format (default: png). Only PNG is currently implemented by PDFProcessor. */
    format?: "png";
};
/** Result of PDF to image conversion. */
export type PDFImageConversionResult = {
    /** Array of base64-encoded PNG images (one per page) */
    images: string[];
    /** Number of pages converted */
    pageCount: number;
    /** Total conversion time in milliseconds */
    conversionTimeMs: number;
    /** Any warnings during conversion */
    warnings?: string[];
};
/** Options for filename sanitization. */
export type SanitizeFileNameOptions = {
    /** Maximum length for the filename (default: 255) */
    maxLength?: number;
    /** Replacement character for invalid chars (default: '_') */
    replacement?: string;
    /** Whether to block dangerous extensions (default: true) */
    blockDangerousExtensions?: boolean;
    /** Whether to allow hidden files starting with dot (default: false) */
    allowHiddenFiles?: boolean;
};
/** Options for display name sanitization. */
export type SanitizeDisplayNameOptions = {
    /** Maximum length for the name (default: 100) */
    maxLength?: number;
    /** Whether to allow unicode characters (default: true) */
    allowUnicode?: boolean;
};
/** Result of SVG sanitization. */
export type SvgSanitizationResult = {
    /** Sanitized SVG content */
    content: string;
    /** Items that were removed during sanitization */
    removedItems: string[];
    /** Whether any content was modified */
    wasModified: boolean;
};
/** Contract implemented by each file-detection strategy. */
export type DetectionStrategy = {
    detect(input: FileInput): Promise<FileDetectionResult>;
};