using NGitLab;
using NGitLab.Models;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;

namespace Pilz.Updating.Administration.Integrations;

public static class GitLabSnippetExtension
{
    private static IGitLabClient GetClient(GitLabSnippetConfig config)
    {
        return new GitLabClient(config.GitLabUrl, config.PersonalAccessToken);
    }

    private static bool LoadSnippet(UpdateServerManager manager)
    {
        var httpClient = new HttpClient();
        var glClient = GetClient(manager.Config.GitLabSnippetConfig);

        if (glClient.Snippets.Get(manager.Config.GitLabSnippetConfig.ProjectId, manager.Config.GitLabSnippetConfig.SnippetId) is not Snippet snippet
            || snippet.Files.FirstOrDefault(f => f.Path == manager.Config.GitLabSnippetConfig.SnippetFilePath) is not SnippetFile file
            || httpClient.GetStringAsync(snippet.Files[1].RawUrl).Result is not string content)
            return false;

        manager.UpdateInfo = UpdateInfo.Parse(content);

        return true;
    }

    private static bool SaveSnippet(UpdateServerManager manager)
    {
        var glClient = GetClient(manager.Config.GitLabSnippetConfig);

        if (glClient == null)
            return false;

        glClient.Snippets.Update(new SnippetProjectUpdate
        {
            SnippetId = manager.Config.GitLabSnippetConfig.SnippetId,
            ProjectId = manager.Config.GitLabSnippetConfig.ProjectId,
            Files = [
                new SnippetUpdateFile
                {
                    Action = SnippetUpdateFileAction.Update,
                    FilePath = manager.Config.GitLabSnippetConfig.SnippetFilePath,
                    Content = manager.UpdateInfo.ToString(),
                }
            ],
            Visibility = VisibilityLevel.Public,
        });

        return true;
    }

    public static Task<bool> ReadInfoFromGitLabSnippet(this UpdateServerManager manager)
    {
        return Task.Run(() => LoadSnippet(manager));
    }

    public static Task<bool> SaveInfoToGitLabSnippet(this UpdateServerManager manager)
    {
        return Task.Run(() => SaveSnippet(manager));
    }
}