using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Windows;
using System.Windows.Threading;
using InABox.Logikal;
using Ofcas.Lk.Api.Client.Core;
using Ofcas.Lk.Api.Shared;

namespace PRSLogikal
{

    public class LogikalLogArguments
    {
        public String Message { get; private set; }

        public LogikalLogArguments(string message)
        {
            Message = message;
        }
        
    }

    public delegate void LogikalLogEvent(object sender, LogikalLogArguments args);
    
    public class LogikalServer : IDisposable, ILogikalApp
    {
        
        //private readonly List<String> _log = new List<String>();
        //public String[] Log => _log.ToArray();


        
        public event LogikalLogEvent Log;
        private void DoLog(String message) => Log?.Invoke(this, new LogikalLogArguments(message));
        
        private IServiceProxyResult _proxy;
        private ICoreObjectResult<ILoginScope> _login;

        public LogikalStatus Connect(string path)
        {
            Disconnect();

            var _p = ServiceProxyFactory.CreateServiceProxy(path);
            var _status = _p.ServiceProxy.Start();
            if (_status.OperationCode != OperationCode.Accepted)
            {
                DoLog($"Unable to connect to Logikal at [{path}]: {_status}");
                return LogikalStatus.Error;
            }

            _proxy = _p;
            return LogikalStatus.Ok;
        }

        public LogikalStatus Disconnect()
        {
            Logout();

            if (_proxy != null)
            {
                _proxy.ServiceProxy.Stop();
                _proxy.Dispose();
            }

            _proxy = null;

            return LogikalStatus.Ok;
        }

        private void DoOnDisconnecting()
        {
            
        }

        public LogikalStatus Login(string username, string password)
        {
            Dictionary<string, object> _parameters = new Dictionary<string, object>()
            {
                { WellKnownParameterKey.Login.ProgramMode, "erp" },
                { WellKnownParameterKey.Login.UserName, username },
                { WellKnownParameterKey.Login.Password, password },

            };

            if (_proxy == null)
            {
                DoLog($"Logikal is not connected");
                return LogikalStatus.Error;
            }

            var _check = _proxy.ServiceProxy.CanLogin(_parameters);
            if (!_check.CanExecute)
            {
                DoLog($"Login not allowed: {_check}!");
                return LogikalStatus.Restricted;
            }

            try
            {
                var _l = _proxy.ServiceProxy.Login(_parameters);
                if (_l.OperationCode != OperationCode.Accepted)
                {
                    DoLog($"Login failed: {_l}");
                    _login = null;
                }
                else
                    _login = _l;
            }
            catch (Exception e)
            {
                Log?.Invoke(this, new LogikalLogArguments($"{e.Message}\n{e.StackTrace}"));
            }
            
            return _login != null ? LogikalStatus.Ok : LogikalStatus.Failed;
        }

        public LogikalStatus Logout()
        {
            if (_login != null)
                _login.Dispose();
            _login = null;
            return LogikalStatus.Ok;
        }
        
        public void Dispose()
        {
            Disconnect();
        }
    }
}