using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using xAiModels.Models;

namespace xAiApi.Interfaces.Extractors
{
    /// <summary>
    /// a Base Service for Extracting File Content ...
    /// </summary>
    public interface IXFileContentExtractorBase
    {
        /// <summary>
        /// Check if this extractor supports the specified MIME type ...
        /// </summary>
        bool CanExtract(string mimeType);

        /// <summary>
        /// Extract text content from file stream ...
        /// </summary>
        Task<string> ExtractAsync(
            Stream fileStream,
            string mimeType,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// Extract content from stream as Rich Result ...
        /// </summary>
        /// <param name="fileStream"></param>
        /// <param name="fileName"></param>
        /// <param name="mimeType"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<XFileExtractionResult> ExtractRichAsync(
            Stream fileStream,
            string fileName,
            string mimeType,
            CancellationToken cancellationToken = default
        );
    }

    /// <summary>
    /// a Service for Extracting File Content ...
    /// </summary>
    public interface IXFileContentExtractor
    {
        /// <summary>
        /// Check if this extractor supports the specified MIME type ...
        /// </summary>
        /// <param name="mimeType"></param>
        /// <param name="extractors"></param>
        /// <returns></returns>
        bool CanExtract(
            string mimeType,
            string[] extractors = null
        );

        /// <summary>
        /// Extract text content from file stream ...
        /// </summary>
        /// <param name="fileStream"></param>
        /// <param name="mimeType"></param>
        /// <param name="extractors"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<string> ExtractAsync(
            Stream fileStream,
            string mimeType,
            string[] extractors = null,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// Extract content from stream as Rich Result ...
        /// </summary>
        /// <param name="fileStream"></param>
        /// <param name="fileName"></param>
        /// <param name="mimeType"></param>
        /// <param name="extractors"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<XFileExtractionResult> ExtractRichAsync(
            Stream fileStream,
            string fileName,
            string mimeType,
            string[] extractors = null,
            CancellationToken cancellationToken = default
        );

    }
}