using ICSharpCode.SharpZipLib.Zip;
using RageCoop.Core;
using System;
using System.IO;
using System.Threading.Tasks;
namespace RageCoop.Server.Scripting
{
    internal class Resources
    {
        public Dictionary<string, ServerResource> LoadedResources = new();
        private readonly Server Server;
        private readonly Logger Logger;
        public bool IsLoaded { get; private set; } = false;
        public Resources(Server server)
        {
            Server = server;
            Logger = server.Logger;
        }
        private readonly Dictionary<string, Stream> ClientResources = new();
        private readonly Dictionary<string, Stream> ResourceStreams = new();
        public void LoadAll()
        {
            // Packages
            {
                var path = Path.Combine("Resources", "Packages");
                Directory.CreateDirectory(path);
                foreach (var pkg in Directory.GetFiles(path, "*.respkg", SearchOption.AllDirectories))
                {
                    Logger?.Debug($"Adding resources from package \"{Path.GetFileNameWithoutExtension(pkg)}\"");
                    var pkgZip = new ZipFile(pkg);
                    foreach (ZipEntry e in pkgZip)
                    {
                        if (!e.IsFile) { continue; }
                        if (e.Name.StartsWith("Client") && e.Name.EndsWith(".res"))
                        {
                            var stream = pkgZip.GetInputStream(e).ToMemStream();
                            ClientResources.Add(Path.GetFileNameWithoutExtension(e.Name), stream);
                            Logger?.Debug("Resource added: " + Path.GetFileNameWithoutExtension(e.Name));
                        }
                        else if (e.Name.StartsWith("Server") && e.Name.EndsWith(".res"))
                        {
                            var stream = pkgZip.GetInputStream(e).ToMemStream();
                            ResourceStreams.Add(Path.GetFileNameWithoutExtension(e.Name), stream);
                            Logger?.Debug("Resource added: " + Path.GetFileNameWithoutExtension(e.Name));
                        }
                    }
                    pkgZip.Close();
                }
            }


            // Client
            {
                var path = Path.Combine("Resources", "Client");
                var tmpDir = Path.Combine("Resources", "Temp", "Client");
                Directory.CreateDirectory(path);
                if (Directory.Exists(tmpDir))
                {
                    Directory.Delete(tmpDir, true);
                }
                Directory.CreateDirectory(tmpDir);
                var resourceFolders = Directory.GetDirectories(path, "*", SearchOption.TopDirectoryOnly);
                if (resourceFolders.Length != 0)
                {
                    foreach (var resourceFolder in resourceFolders)
                    {
                        // Pack client side resource as a zip file
                        Logger?.Info("Packing client-side resource: " + resourceFolder);
                        var zipPath = Path.Combine(tmpDir, Path.GetFileName(resourceFolder)) + ".res";
                        try
                        {
                            using ZipFile zip = ZipFile.Create(zipPath);
                            zip.BeginUpdate();
                            foreach (var dir in Directory.GetDirectories(resourceFolder, "*", SearchOption.AllDirectories))
                            {
                                zip.AddDirectory(dir[(resourceFolder.Length + 1)..]);
                            }
                            foreach (var file in Directory.GetFiles(resourceFolder, "*", SearchOption.AllDirectories))
                            {
                                if (Path.GetFileName(file).CanBeIgnored()) { continue; }
                                zip.Add(file, file[(resourceFolder.Length + 1)..]);
                            }
                            zip.CommitUpdate();
                            zip.Close();
                            ClientResources.Add(Path.GetFileNameWithoutExtension(zipPath), File.OpenRead(zipPath));
                        }
                        catch (Exception ex)
                        {
                            Logger?.Error($"Failed to pack client resource:{resourceFolder}");
                            Logger?.Error(ex);
                        }
                    }
                }
                var packed = Directory.GetFiles(path, "*.res", SearchOption.TopDirectoryOnly);
                if (packed.Length > 0)
                {
                    foreach (var file in packed)
                    {
                        ClientResources.Add(Path.GetFileNameWithoutExtension(file), File.OpenRead(file));
                    }
                }
            }

            // Server
            {
                var path = Path.Combine("Resources", "Server");
                var dataFolder = Path.Combine(path, "data");
                Directory.CreateDirectory(path);
                foreach (var resource in Directory.GetDirectories(path))
                {
                    try
                    {
                        var name = Path.GetFileName(resource);
                        if (LoadedResources.ContainsKey(name))
                        {
                            Logger?.Warning($"Resource \"{name}\" has already been loaded, ignoring...");
                            continue;
                        }
                        if (name.ToLower() == "data") { continue; }
                        Logger?.Info($"Loading resource: {name}");
                        var r = ServerResource.LoadFrom(resource, dataFolder, Logger);
                        LoadedResources.Add(r.Name, r);
                    }
                    catch (Exception ex)
                    {
                        Logger?.Error($"Failed to load resource: {Path.GetFileName(resource)}");
                        Logger?.Error(ex);
                    }
                }
                foreach (var res in Directory.GetFiles(path, "*.res", SearchOption.TopDirectoryOnly))
                {
                    if (!ResourceStreams.TryAdd(Path.GetFileNameWithoutExtension(res), File.OpenRead(res)))
                    {
                        Logger?.Warning($"Resource \"{res}\" cannot be loaded, ignoring...");
                        continue;
                    }
                }
                foreach (var res in ResourceStreams)
                {
                    try
                    {
                        var name = res.Key;
                        if (LoadedResources.ContainsKey(name))
                        {
                            Logger?.Warning($"Resource \"{name}\" has already been loaded, ignoring...");
                            continue;
                        }
                        Logger?.Info($"Loading resource: " + name);
                        var r = ServerResource.LoadFrom(res.Value, name, Path.Combine("Resources", "Temp", "Server"), dataFolder, Logger);
                        LoadedResources.Add(r.Name, r);
                    }
                    catch (Exception ex)
                    {
                        Logger?.Error($"Failed to load resource: {res.Key}");
                        Logger?.Error(ex);
                    }
                }

                // Start scripts
                lock (LoadedResources)
                {
                    foreach (var r in LoadedResources.Values)
                    {
                        foreach (ServerScript s in r.Scripts.Values)
                        {
                            s.API = Server.API;
                            try
                            {
                                Logger?.Debug("Starting script:" + s.CurrentFile.Name);
                                s.OnStart();
                            }
                            catch (Exception ex) { Logger?.Error($"Failed to start resource: {r.Name}"); Logger?.Error(ex); }
                        }
                    }
                }
                IsLoaded = true;
            }
        }

        public void UnloadAll()
        {
            lock (LoadedResources)
            {
                foreach (var d in LoadedResources.Values)
                {
                    foreach (var s in d.Scripts.Values)
                    {
                        try
                        {
                            s.OnStop();
                        }
                        catch (Exception ex)
                        {
                            Logger?.Error(ex);
                        }
                    }
                    try
                    {
                        d.Dispose();
                    }
                    catch (Exception ex)
                    {
                        Logger.Error($"Resource \"{d.Name}\" cannot be unloaded.");
                        Logger.Error(ex);
                    }
                }
                LoadedResources.Clear();
            }
            foreach (var s in ResourceStreams.Values)
            {
                try
                {
                    s.Close();
                    s.Dispose();
                }
                catch (Exception ex)
                {
                    Logger?.Error("[Resources.CloseStream]", ex);
                }
            }
            foreach (var s in ClientResources.Values)
            {
                try
                {
                    s.Close();
                    s.Dispose();
                }
                catch (Exception ex)
                {
                    Logger?.Error("[Resources.CloseStream]", ex);
                }
            }
        }
        public void SendTo(Client client)
        {
            Task.Run(() =>
            {
                try
                {

                    if (ClientResources.Count != 0)
                    {
                        Logger?.Info($"Sending resources to client:{client.Username}");
                        foreach (var rs in ClientResources)
                        {
                            Logger?.Debug(rs.Key);
                            Server.SendFile(rs.Value, rs.Key + ".res", client);
                        }

                        Logger?.Info($"Resources sent to:{client.Username}");
                    }
                    if (Server.GetResponse<Packets.FileTransferResponse>(client, new Packets.AllResourcesSent())?.Response == FileResponse.Loaded)
                    {
                        client.IsReady = true;
                        Server.API.Events.InvokePlayerReady(client);
                    }
                    else
                    {
                        Logger?.Warning($"Client {client.Username} failed to load resource.");
                    }
                }
                catch (Exception ex)
                {
                    Logger.Error("Failed to send resource to client: " + client.Username, ex);
                    client.Kick("Resource error!");
                }
            });
        }
    }
}