using System.Text.Json.Serialization;
using System.IO.Compression;
using RobloxLegacy.AppData;
using RobloxLegacy.Utilities;

namespace RobloxLegacy;

public abstract class VersionData
{
    [JsonPropertyName("version")]
    public required string Version { get; set; }

    [JsonPropertyName("clientVersionUpload")]
    public required string UploadHash { get; set; }
}

public class VersionManager(IAppData appData)
{
    private static readonly HttpClient Client = new();
    private const string CdnUrl = "https://setup.rbxcdn.com";

    private static string GetVersionPath(string version)
    {
        var localAppDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
        return Path.Combine(localAppDataPath, "Roblox", "Versions", version);
    }
    
    private async Task<VersionData?> GetLatestVersion()
    {
        var url = $"https://clientsettings.roblox.com/v2/client-version/{appData.Name}/channel/LIVE";
        var response = await Client.GetAsync(url);
        if(!response.IsSuccessStatusCode) // just to be safe
            return null;
        var version = await response.Content.ReadAsAsync<VersionData>();
        return version;
    }

    private static void ExtractBundle(string version, string folder, Stream file)
    {
        var extractPath = Path.Combine(GetVersionPath(version), folder);
        ZipFile.ExtractToDirectory(file, extractPath);
    }

    public async Task InstallPackage()
    {
        var version = await GetLatestVersion();
        if(version == null)
            throw new Exception("No version data found");
        
        Logger.Log($"Installing {appData.Name} version {version.Version}");
        foreach (var file in appData.PackageFiles)
        {
            var fileName = $"{version.UploadHash}-{file.Key}";
            var fileStream = await Client.GetStreamAsync($"{CdnUrl}/{fileName}");
            ExtractBundle(version.UploadHash, file.Value, fileStream);
        }
    }
}