using Modrinth;
using Octokit;
using System.Text.RegularExpressions;

namespace ModpackUpdater.Manager;

public class ModpackFactory
{
    private readonly GitHubClient github = new(new ProductHeaderValue("MinecraftModpackUpdater"));
    private readonly CurseForge.APIClient.ApiClient curseForge = new("b67bd218-e011-4963-ac8a-ffd025e1091f", "pilzinsel64@gmx.de");
    private readonly ModrinthClient modrinth = new(new ModrinthClientConfig
    {
        ModrinthToken = "mrp_zUlDSET5actMUdTU3FK242TXgvlWgaErSSEFuegNG7thLgkC50IiK2NCGOzW",
        UserAgent = "Pilz.ModpackUpater",
    });

    ~ModpackFactory()
    {
        curseForge.Dispose();
        modrinth.Dispose();
    }

    public async Task<string> ResolveSourceUrl(InstallAction action)
    {
        if (action.SourceType == SourceType.GitHub)
        {
            var repo = await github.Repository.Get(action.SourceOwner, action.SourceName);
            var release = await github.Repository.Release.Get(repo.Id, action.SourceTag);
            var assets = await github.Repository.Release.GetAllAssets(repo.Id, release.Id);

            if (assets.LastOrDefault(asset => Regex.IsMatch(asset.Name, action.SourceRegex)) is ReleaseAsset asset)
                return asset.BrowserDownloadUrl;
        }
        else if (action.SourceType == SourceType.GitLab)
        {
            throw new NotImplementedException("To be implemented soon.");
        }
        else if (action.SourceType == SourceType.CurseForge)
        {
            var res = await curseForge.GetModFileDownloadUrlAsync(Convert.ToInt32(action.SourceName), Convert.ToInt32(action.SourceTag));
            if (!string.IsNullOrWhiteSpace(res.Data))
                return res.Data;
        }
        else if (action.SourceType == SourceType.Modrinth)
        {
            var res = await modrinth.VersionFile.GetVersionByHashAsync(action.SourceTag);
            var file = res.Files.Length == 1 ? res.Files[0] : res.Files.FirstOrDefault(n => Regex.IsMatch(n.FileName, action.SourceRegex));
            if (file != null)
                return file.Url;
        }

        return action.SourceUrl;
    }

    public async Task<KeyValuePair<string, string>[]> FindUpdates(InstallAction action, ModLoader modLoader = ModLoader.Any, string? gameVersion = null)
    {
        if (action.SourceType == SourceType.GitHub)
        {
            var repo = await github.Repository.Get(action.SourceOwner, action.SourceName);
            var releases = await github.Repository.Release.GetAll(repo.Id);

            return releases.Select(r => new KeyValuePair<string, string>(r.Name, r.TagName)).ToArray();
        }
        else if (action.SourceType == SourceType.GitLab)
        {
            throw new NotImplementedException("To be implemented soon.");
        }
        else if (action.SourceType == SourceType.CurseForge)
        {
            var res = await curseForge.GetModFilesAsync(Convert.ToInt32(action.SourceName), gameVersion: "1.7.10", modLoaderType: CurseForge.APIClient.Models.Mods.ModLoaderType.Forge);
            if (res.Data != null)
                return res.Data.Select(n => new KeyValuePair<string, string>(n.DisplayName, n.Id.ToString())).ToArray();
        }
        else if (action.SourceType == SourceType.Modrinth)
        {
            var res = await modrinth.Version.GetProjectVersionListAsync(action.SourceName);
            return res.Select(v => new KeyValuePair<string, string>($"{v.VersionNumber} {v.ProjectVersionType} {v.Name}", v.Id)).ToArray();
        }

        return null;
    }
}