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}/";

    private static readonly HttpClient Client = new();

    public static Stream DownloadRepo(string name, string commit, out string? fileName)
    {
        var uri = new Uri(string.Format(repoZipUrl, name, commit), UriKind.Absolute);
        LogFile.Log.Debug("Downloading {Uri}", uri);
        using var response = Client.GetAsync(uri, HttpCompletionOption.ResponseHeadersRead).Result;

        fileName = response.Content.Headers.ContentDisposition?.FileName;

        using var stream = response.Content.ReadAsStream();
        var mem = new MemoryStream();
        stream.CopyTo(mem);
        mem.Position = 0;
        return mem;
    }

    public static Stream DownloadFile(string name, string commit, string path)
    {
        var uri = new Uri(string.Format(rawUrl, name, commit) + path.TrimStart('/'), UriKind.Absolute);
        LogFile.Log.Debug("Downloading {Uri}", uri);
        return Client.GetStreamAsync(uri).Result;
    }
}