using Microsoft.AspNetCore.StaticFiles;
using System.IO;

namespace BotSharp.Core.Files.Services;

public partial class BotSharpFileService
{
    public string GetDirectory(string conversationId)
    {
        var dir = Path.Combine(_dbSettings.FileRepository, CONVERSATION_FOLDER, conversationId, "attachments");
        if (!Directory.Exists(dir))
        {
            Directory.CreateDirectory(dir);
        }
        return dir;
    }

    public (string, byte[]) GetFileInfoFromData(string data)
    {
        if (string.IsNullOrEmpty(data))
        {
            return (string.Empty, new byte[0]);
        }

        var typeStartIdx = data.IndexOf(':');
        var typeEndIdx = data.IndexOf(';');
        var contentType = data.Substring(typeStartIdx + 1, typeEndIdx - typeStartIdx - 1);

        var base64startIdx = data.IndexOf(',');
        var base64Str = data.Substring(base64startIdx + 1);

        return (contentType, Convert.FromBase64String(base64Str));
    }

    public string GetFileContentType(string filePath)
    {
        string contentType;
        var provider = new FileExtensionContentTypeProvider();
        if (!provider.TryGetContentType(filePath, out contentType))
        {
            contentType = string.Empty;
        }

        return contentType;
    }

    public byte[] GetFileBytes(string fileStorageUrl)
    {
        using var stream = File.OpenRead(fileStorageUrl);
        var bytes = new byte[stream.Length];
        stream.Read(bytes, 0, (int)stream.Length);
        return bytes;
    }

    public bool SavefileToPath(string filePath, Stream stream)
    {
        using (var fileStream = new FileStream(filePath, FileMode.Create))
        {
            stream.CopyTo(fileStream);
        }
        return true;
    }
}