using System;
using System.Collections.Generic;
using System.Data.SQLite;
using System.Dynamic;
using System.IO;
using System.Linq;
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
    {
        
        //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 bool IsLoggedIn() => _login != null;

        public IEnumerable<ILogikalProject> GetProjects()
        {
            List<ILogikalProject> _result = null;
            if (_login != null)
            {
                IProjectCenterInfo _info = _login.CoreObject.ProjectCenterInfos.FirstOrDefault();
                if (_info != null)
                {
                    _result = new List<ILogikalProject>();
                    using (ICoreObjectResult<IProjectCenter> _center = _login.CoreObject.GetProjectCenter(_info))
                    {
                        IList<IBaseProjectInfo> _projects = _center.CoreObject.ChildrenInfos;
                        foreach (var _project in _projects)
                        {
                            var _summary = new LogikalProject()
                            {
                                ID = _project.Guid,
                                Name = _project.Name,
                                PersonInCharge = _project.PersonInCharge,
                                Path = _project.Path
                            };
                            _result.Add(_summary);
                        }
                    }
                }
                else
                    DoLog($"Cannot Retrieve Project List: No ProjectCenterInfo available");
            }
            else
                DoLog($"Cannot Retrieve Project List: Not Logged In");
            return _result;
        }
        
        public ILogikalProject GetProject(Guid projectid)
        {
            ILogikalProject _result = null;
            if (_login != null)
            {
                var _project = _login.CoreObject.GetProjectByGuid(projectid);
                if (_project != null)
                {
                    _result = new LogikalProject()
                    {
                        ID = _project.CoreObject.Id,
                        Name = _project.CoreObject.Info.Name
                    };
                    List<LogikalElevation> _elevations = new List<LogikalElevation>();
                    ICoreObjectListResult<IPhase> phases = _project.CoreObject.GetChildren();
                    foreach (ICoreObjectResult<IPhase> phase in phases.CoreObjectResults)
                    {
                        ICoreObjectListResult<IElevation> elevations = phase.CoreObject.GetChildren();
                        foreach (ICoreObjectResult<IElevation> elevation in elevations.CoreObjectResults)
                        {
                            var _summary = new LogikalElevation()
                            {
                                ID = elevation.CoreObject.Id,
                                Name = elevation.CoreObject.Info.Name,
                                Phase = phase.CoreObject.Info.Name
                            };
                            using (var ms = new MemoryStream())
                            {
                                IStreamResult thumbnail =
                                    elevation.CoreObject.GetThumbnail(new Dictionary<string, object>() { });
                                thumbnail.Stream.CopyTo(ms);
                                _summary.Thumbnail = ms.GetBuffer();
                            }
                            _elevations.Add(_summary);
                        }
                    }
                }
                else
                    DoLog($"Cannot Load Project {projectid}");
            }
            else
            {
                DoLog($"Cannot Load Project: Not Logged In");
            }
            return _result;
        }
        public ILogikalElevation GetElevation(Guid elevationid)
        {
            LogikalElevation _result = null;
            if (_login != null)
            {
                var _project = _login.CoreObject.GetProjectFromElevation(elevationid);
                if (_project != null)
                {
                    ICoreObjectListResult<IPhase> children = _project.CoreObject.GetChildren();
                    foreach (ICoreObjectResult<IPhase> child in children.CoreObjectResults)
                    {
                        ICoreObjectResult<IElevation> elevation = child.CoreObject.GetChildren().CoreObjectResults.FirstOrDefault(x=>x.CoreObject.Id == elevationid);
                        if (elevation != null)
                        {
                            _result = new LogikalElevation()
                            {
                                ID = elevation.CoreObject.Id,
                                Name = elevation.CoreObject.Info.Name
                            };
                            using (var ms = new MemoryStream())
                            {
                                IDrawingResult thumbnail =
                                    elevation.CoreObject.GetDrawing(new Dictionary<string, object>() { });
                                thumbnail.Stream.CopyTo(ms);
                                _result.Drawing = ms.GetBuffer();
                            }

                            IStreamResult parts = elevation.CoreObject.GetPartsList();
                            var file = Path.Combine(Path.GetTempPath(), Path.GetTempFileName());
                            using (var fs = new FileStream(file, FileMode.OpenOrCreate))
                                parts.Stream.CopyTo(fs);
                            var sb = new SQLiteConnectionStringBuilder();
                            sb.DataSource = file;
                            var _connection = new SQLiteConnection(sb.ToString());
                            _connection.Open();
                            // Parse the file here
                            _connection.Close();
                            File.Delete(file);
                        }
                    }
                }
                else
                    DoLog($"Cannot Load Project from Elevation {elevationid}");
            }
            else
                DoLog($"Cannot Retrieve Project List: Not Logged In");
            
            return _result;
        }
        
        
        public void Dispose()
        {
            Disconnect();
        }
    }
}