using System.Net;

namespace PluginLoader.Network;

public static class GitHub
{
    public const string listRepoName = "sepluginloader/PluginHub";
    public const string listRepoCommit = "main";
    public const string listRepoHash = "plugins.sha1";

    private const string repoZipUrl = "https://github.com/{0}/archive/{1}.zip";
    private const string rawUrl = "https://raw.githubusercontent.com/{0}/{1}/";

    public static Stream DownloadRepo(string name, string commit, out string fileName)
    {
        var uri = new Uri(string.Format(repoZipUrl, name, commit), UriKind.Absolute);
        LogFile.WriteLine("Downloading " + uri);
        var request = WebRequest.CreateHttp(uri);
        request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
        request.Timeout = Main.Instance.Config.NetworkTimeout;

        var response = (HttpWebResponse)request.GetResponse();
        fileName = response.Headers["Content-Disposition"];
        if (fileName != null)
        {
            var index = fileName.IndexOf("filename=");
            if (index >= 0)
            {
                index += "filename=".Length;
                fileName = fileName.Substring(index).Trim('"');
            }
        }

        return response.GetResponseStream();
    }

    public static Stream DownloadFile(string name, string commit, string path)
    {
        var uri = new Uri(string.Format(rawUrl, name, commit) + path.TrimStart('/'), UriKind.Absolute);
        LogFile.WriteLine("Downloading " + uri);
        var request = WebRequest.CreateHttp(uri);
        request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
        request.Timeout = Main.Instance.Config.NetworkTimeout;

        var response = (HttpWebResponse)request.GetResponse();
        return response.GetResponseStream();
    }
}