using System;
using System.Threading;
using System.Threading.Tasks;

namespace pkNX.Containers;

/// <summary>
/// Array of Files
/// </summary>
public interface IFileContainer
{
    /// <summary>
    /// Path the <see cref="IFileContainer"/> was loaded from.
    /// </summary>
    string? FilePath { get; set; }

    /// <summary>
    /// Indication if the contents of the <see cref="IFileContainer"/> have been modified.
    /// </summary>
    bool Modified { get; set; }

    /// <summary>
    /// Count of files inside the <see cref="IFileContainer"/>.
    /// </summary>
    int Count { get; }

    /// <summary>
    /// File access for individually indexed files.
    /// </summary>
    /// <param name="index">File number to fetch</param>
    /// <returns>Data representing the file at the specified index.</returns>
    byte[] this[int index] { get; set; }

    Task<byte[][]> GetFiles();
    Task<byte[]> GetFile(int file, int subFile = 0);
    Task SetFile(int file, byte[] value, int subFile = 0);
    Task SaveAs(string path, ContainerHandler handler, CancellationToken token);

    void Dump(string path, ContainerHandler handler);
    void CancelEdits();
}

public static class FileContainerExtensions
{
    public static string GetFileFormatString(this IFileContainer c) => "D" + Math.Ceiling(Math.Log10(c.Count));
}