using ErgometerLibrary;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace ErgometerServer
{
    class ClientThread
    {
        TcpClient client;
        Server server;

        public string name;
        public int session { get; }

        bool running;
        bool loggedin;

        List<Meting> metingen;
        List<ChatMessage> chat;

        public ClientThread(TcpClient client, Server server)
        {
            this.client = client;
            this.server = server;
            this.name = "Unknown";
            this.session = 0;
            this.running = false;
            this.loggedin = false;

            metingen = new List<Meting>();
            chat = new List<ChatMessage>();
            session = FileHandler.GenerateSession();
            Console.WriteLine("Generated new session: " + session);
        }

        public void run()
        {
            running = true;

            NetHelper.SendNetCommand(client, new NetCommand(session));

            while (running)
            {
                NetCommand input = NetHelper.ReadNetCommand(client);

                switch(input.Type)
                {
                    case NetCommand.CommandType.SESSION:

                        break;
                    case NetCommand.CommandType.LOGIN:
                        if(! server.CheckPassword(input.DisplayName, input.Password))
                        {
                            NetHelper.SendNetCommand(client, new NetCommand(NetCommand.ResponseType.LOGINWRONG, session));
                            loggedin = false;
                        }
                        else
                        {
                            NetHelper.SendNetCommand(client, new NetCommand(NetCommand.ResponseType.LOGINOK, session));
                            loggedin = true;

                            if (input.IsDoctor)
                            {
                                server.ChangeClientToDoctor(client, this);
                                Console.WriteLine("Doctor connected");
                                running = false;
                            }
                            else
                            {
                                name = input.DisplayName;
                                loggedin = true;
                                FileHandler.CreateSession(session, name);
                            }
                        }
                        break;
                    case NetCommand.CommandType.UITLEG:
                        if (loggedin)
                        {
                            server.SendToDoctor(input);
                        }
                        break;
                    case NetCommand.CommandType.PERSONDATA:
                        if (loggedin)
                        {
                            FileHandler.SavePersonalData(input, session);
                        }
                        break;
                    case NetCommand.CommandType.TESTRESULT:
                        if (loggedin)
                        {
                            FileHandler.SaveTestResult(input, session);
                        }
                        break;
                    case NetCommand.CommandType.DATA:
                        if (loggedin)
                        {
                            metingen.Add(input.Meting);
                            server.SendToDoctor(input);
                        }
                        else
                            NetHelper.SendNetCommand(client, new NetCommand(NetCommand.ResponseType.NOTLOGGEDIN, session));

                        break;
                    case NetCommand.CommandType.CHAT:
                        if (loggedin)
                        {
                            chat.Add(new ChatMessage(name, input.ChatMessage, false));
                            server.SendToDoctor(input);
                        }
                        else
                            NetHelper.SendNetCommand(client, new NetCommand(NetCommand.ResponseType.NOTLOGGEDIN, session));
                        break;
                    case NetCommand.CommandType.LOGOUT:
                        loggedin = false;
                        running = false;
                        Console.WriteLine(name + " logged out");
                        FileHandler.WriteMetingen(session, metingen);
                        FileHandler.WriteChat(session, chat);
                        client.Close();
                        break;
                    case NetCommand.CommandType.ERROR:
                        Console.WriteLine("An error occured, assuming client disconnected");
                        loggedin = false;
                        running = false;
                        Console.WriteLine(name + " logged out due to an error");
                        FileHandler.WriteMetingen(session, metingen);
                        FileHandler.WriteChat(session, chat);
                        client.Close();
                        break;
                    default:
                        if(loggedin)
                            throw new FormatException("Unknown command");
                        break;
                }
            }

            server.RemoveActiveSession(this);
        }

        public void SendToClient(NetCommand command)
        {
            NetHelper.SendNetCommand(client, command);
            if (command.Type == NetCommand.CommandType.CHAT)
            {
                chat.Add(new ChatMessage("Doctor", command.ChatMessage, true));
            }
        }
    }
}