using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Security.Authentication;
using System.Text;
using System.Text.Json;
using System.Threading;
using JacobTechEncryption;
using JacobTechEncryption.Enums;
using Luski.net.Enums;
using Luski.net.JsonTypes;
using Luski.net.JsonTypes.WSS;
using Luski.net.Structures.Main;
using WebSocketSharp;

namespace Luski.net;

public partial class MainServer
{
    public void Login(string Username, string Password, CancellationToken CancellationToken)
    {
        Both(Username, Password, CancellationToken);
    }

    public void CreateAccount(string Username, string Password, string Displayname, string PFP, CancellationToken CancellationToken)
    {
        Both(Username, Password, CancellationToken, Displayname, PFP);
    }

    private void Both(string Username, string Password, CancellationToken CancellationToken, string? Displayname = null, string? pfp = null)
    {
        if (!EncryptionHandler.Generating)
        {
            EncryptionHandler.GenerateKeys();
        }
        while (!EncryptionHandler.Generated) { }

        login = true;
        Login json;
        List<KeyValuePair<string, string?>> heads = new()
        {
            new("key", EncryptionHandler.MyPublicKey),
            new("email", Convert.ToBase64String(Encryption.RSA.Encrypt(Username, EncryptionHandler.ServerPublicKey, EncoderType.UTF16))),
            new("password", EncryptionHandler.RemotePasswordEncrypt(Encoding.Unicode.GetBytes(Password)))
        };
        if (File.Exists("LastPassVer.txt") && int.TryParse(File.ReadAllText("LastPassVer.txt"), out int lpv) && lpv < EncryptionHandler.PasswordVersion && lpv >= 0)
        {
            heads.Add(new("old_password", EncryptionHandler.RemotePasswordEncrypt(Encoding.Unicode.GetBytes(Password), lpv)));
            heads.Add(new("old_version", lpv.ToString()));
        }
        if (pfp is not null)
        {
            heads.Add(new("username", Displayname));
            json = SendServer(
                "CreateAccount",
                pfp,
                LoginContext.Default.Login,
                CancellationToken,
                heads.ToArray()).Result;
        }
        else
        {
            json = GetFromServer(
                "Login",
                LoginContext.Default.Login,
                CancellationToken,
                heads.ToArray()).Result;
        }
        if (json.Error is not null) throw new Exception($"Luski appears to be down at the current moment: {json.ErrorMessage}");
        if (EncryptionHandler.OfflinePrivateKey is null || EncryptionHandler.OfflinePublicKey is null) throw new Exception("Something went wrong generating the offline keys");
        login = false;
        if (json is not null && json.Error is null)
        {
            ServerOut = new WebSocket($"{(Secure ? "wss" : "ws" )}://{Domain}/WSS/{ApiVersion}");
            if (Secure) ServerOut.SslConfiguration.EnabledSslProtocols = SslProtocols.Tls13 | SslProtocols.Tls12;
            ServerOut.OnMessage += DataFromServer;
            ServerOut.WaitTime = new TimeSpan(0, 0, 5);
            ServerOut.OnError += ServerOut_OnError;
            ServerOut.Connect();
            SendServerOld(new WSSLogin() { Token = json.Token! }, WSSLoginContext.Default.WSSLogin);
            while (Token is null && Error is null)
            {
                Thread.Sleep(500);
            }
            if (Error is not null)
            {
                throw new Exception(Error);
            }
            
            if (Token is null) throw new Exception("Server did not send a token");
            CanRequest = true;
            long id = long.Parse(Encoding.UTF8.GetString(Convert.FromBase64String(
                Token.Split('.')[0]
            )));
            User = GetUser(id, MainSocketAppUserContext.Default.MainSocketAppUser,
                    CancellationToken)
                .Result;
            if (User is null || User.Error is not null)
            {
                string error = "User was null";
                if (User is not null && User.Error is not null) error = $"{User.Error}: {User.ErrorMessage}";
                throw new Exception($"Something went wrong getting your user infermation\n{error}");
            }
            _ = UpdateStatus(UserStatus.Online, CancellationToken);
            if (pfp is not null)
            {
                //post
            }
            else
            {
                
            }
            EncryptionHandler.Hash = EncryptionHandler.LocalPasswordEncrypt(Encoding.Unicode.GetBytes(Username.ToLower() + Password));
            OfflineData offlinedata = GetFromServer("Keys/GetOfflineData", OfflineDataContext.Default.OfflineData, CancellationToken).Result;
            if (offlinedata is not null && offlinedata.Error is null && offlinedata.Data is not null && offlinedata.Data.Length > 0)
            {
                foreach (string keyex in offlinedata.Data)
                {
                    KeyExchange? okd = JsonSerializer.Deserialize<KeyExchange>(keyex);
                    if (okd is not null && !string.IsNullOrEmpty(okd.key))
                    {
                        Storage.SetResourceKey(
                            StorageDirectory.ChannelKeys, 
                            okd.channel.ToString(), 
                            EncryptionHandler.Hash, 
                            Encoding.Unicode.GetString(
                                Encryption.RSA.Decrypt(
                                    Convert.FromBase64String(okd.key),
                                    Storage.GetResourceKeyRaw(
                                        StorageDirectory.ServerKeys,
                                        "pkey",
                                        EncryptionHandler.Hash
                                    )
                                )
                            )
                        );
                    }
                }
            }
            System.IO.File.WriteAllText("LastPassVer.txt", EncryptionHandler.PasswordVersion.ToString());
            Storage.SetResourceKey(StorageDirectory.ServerKeys, "pkey", EncryptionHandler.Hash, EncryptionHandler.OfflinePrivateKey);
            using HttpClient setkey = new();
            setkey.DefaultRequestHeaders.Add("token", Token);
            _ = setkey.PostAsync($"{(Secure ? "https" : "http" )}://{Domain}/{ApiVersion}/Keys/SetOfflineKey", new StringContent(EncryptionHandler.OfflinePublicKey)).Result;
            foreach (var ch in chans)
            {
                _ = ch.Members;
            }
            EncryptionHandler.OfflinePublicKey = null;
            EncryptionHandler.OfflinePrivateKey = null;
        }
        else throw new Exception(json?.ErrorMessage);
    }
}