using Fluxor;
using KoogleApp.Games;
using KoogleApp.Games.Training;
using KoogleApp.Hub;
using KoogleApp.Model;
using KoogleApp.Model.EventMessages;
using KoogleApp.Model.Framework;
using KoogleApp.Services;
using KoogleApp.Store.Game.Participants;
using KoogleApp.Store.Game.Setup;
using KoogleApp.Store.Game.ThrowTimer;
using KoogleApp.Store.Game.UndoRedo;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
using Microsoft.Win32.SafeHandles;
using System;
using System.Diagnostics;
using System.Text.Json;

namespace KoogleApp.Store.Game.ThrowPanel
{
    public class ThrowPanelEffects(
        IMyEventAggregator eventAggregator,
        ILogger<ThrowPanelEffects> logger,
        HubConnectionService sharedHubService,
        IState<ThrowPanelState> throwPanelState,
        IState<SetupState> setupState,
        AuthenticationStateProvider authenticationStateProvider,
        IGameStatusDataService dataService,
        IGameServiceFactory gameServiceFactory,
        SessionStorage sessionStorage)
        : IDisposable
    {
        private readonly string _dataFilePath = "ThrowPanelState.json";
        private readonly Lock _lock = new Lock();

        public void Dispose()
        {
            //_sharedHubService?.Dispose();
        }

        [EffectMethod]
        public async Task HandleStartAction(StartStopAction startStopAction, IDispatcher dispatcher)
        {
            ParticipantsState? participantsState = null;
            
            if (startStopAction.StartParams != null) // start action
            {
                dispatcher.Dispatch(new SetParticipatingPlayersAction(startStopAction.StartParams.Participants));

                // here we just want to pass the participants with ThrowPanelStateChangedAction - therefore we create a copy of ParticipantsState - I think this is valid just for the startup of a new game
                participantsState = new ParticipantsState(startStopAction.StartParams.Participants, []);


                var gameService = gameServiceFactory.GetService(startStopAction.StartParams.KnownGameType);
                var gameModel = gameService.InitGameModel(startStopAction.StartParams, dispatcher);

                dispatcher.Dispatch(new GameModelChangedAction(gameModel.ConvertToState()));


                var username = await GetUsername();
                dataService.UpdateData(new GameStatus()
                {
                    ThrowPanelState = throwPanelState.Value, 
                    ParticipantsState = participantsState,
                    SetupModel = startStopAction.StartParams,
                    GameState = gameModel.ConvertToState(),
                }, username);

                
            }
            else // stop action
            {
                var gameModel = GameService.FinalizeGameModel();
                _gameService = null;

                var username = await GetUsername();
                await dataService.SaveToDatabaseAndReset(new GameStatus
                {
                    ThrowPanelState = throwPanelState.Value with { ThrowPanelStateStatus = ThrowPanelStateStatus.GameEnd },
                    GameState = gameModel?.ConvertToState()
                }, username);
                dispatcher.Dispatch(new UpdateUndoRedoStateAction());

                

                participantsState = new ParticipantsState();
                dispatcher.Dispatch(new ThrowPanelStateChangedAction(throwPanelState.Value, true, 
                    ParticipantsState: participantsState, GameState: gameModel?.ConvertToState()));

                dispatcher.Dispatch(new ResetSetupStateAction()); 
            }

            // reset settings and all relevant states for the next game
            
            dispatcher.Dispatch(new ParticipantsStateChangedAction(participantsState));
            //dispatcher.Dispatch(new ResetSetupStateAction()); // TODO: not reduced
        }

        [EffectMethod]
        public Task HandleToggleAllPinsAction(ToggleAllPinsAction stopAction, IDispatcher dispatcher)
        {
            dispatcher.Dispatch(new ThrowPanelStateChangedAction(throwPanelState.Value, 
                false, null, null));
            return Task.CompletedTask;
        }

        [EffectMethod]
        public Task HandleTogglePinValueAction(TogglePinValueAction stopAction, IDispatcher dispatcher)
        {
            dispatcher.Dispatch(new ThrowPanelStateChangedAction(throwPanelState.Value, 
                false, null, null));
            return Task.CompletedTask;
        }

        [EffectMethod]
        public Task HandleUpdatePinStateByNumberAction(UpdatePinStateByNumberAction stopAction, IDispatcher dispatcher)
        {
            dispatcher.Dispatch(new ThrowPanelStateChangedAction(throwPanelState.Value, 
                false, null, null));
            return Task.CompletedTask;
        }

        [EffectMethod]
        public Task HandleToggleBellAction(ToggleBellAction stopAction, IDispatcher dispatcher)
        {
            dispatcher.Dispatch(new ThrowPanelStateChangedAction(throwPanelState.Value, 
                false, null, null));
            return Task.CompletedTask;
        }

        //ThrowBeforeUpdateAction
        //ThrowUpdateAction
        //ThrowAfterUpdate
        [EffectMethod]
        public async Task HandleEnsureBeforeThrowStatusAction(EnsureBeforeThrowStatusAction throwAction, IDispatcher dispatcher)
        {
            dispatcher.Dispatch(new ThrowPanelStateChangedAction(throwPanelState.Value, true, 
                throwAction.ParticipantsState, throwAction.GameState));
        }

        private IGameService? _gameService = null;

        private IGameService? GameService
        {
            get
            {
                if (_gameService == null)
                {
                    _gameService = gameServiceFactory.GetService(dataService.StartParams.KnownGameType);
                    
                }
                return _gameService;
            }
        }

        [EffectMethod]
        public async Task HandleThrowAction(ThrowAction throwAction, IDispatcher dispatcher)
        {
            var beforeStates = dataService.GetCurrentData();

            // change ThrowStatus and save - here we need to save the old state, before it is changed by ThrowUpdateAction, so that undo/redo works correctly
            dispatcher.Dispatch(new EnsureBeforeThrowStatusAction(throwAction.ParticipantsState, beforeStates.Status.GameState));

            // perform throw - we will get the new state after resetting all pins for the next throw.
            // For the calculation of the game-progress in HandleThrow nextState if normally not useful
            var nextState = beforeStates.Status.ThrowPanelState.CalculateNextPanelState();
            //dispatcher.Dispatch(new ThrowUpdateAction(nextState));

            var generalGameProgress = new GameProgress(
                BeforeThrowState: beforeStates.Status?.ThrowPanelState,
                BeforeParticipantsState: throwAction.ParticipantsState,
                AfterThrowState: throwPanelState.Value,
                AfterParticipantsState: throwAction.ParticipantsState,
                StartParams: dataService.StartParams,
                GameModel: beforeStates.Status.GameState.ConvertToModel(),
                NextThrowState: nextState);
        
            dispatcher.Dispatch(generalGameProgress); // currently unused

            //var participants = throwAction.ParticipantsState;

            //var gameSpecificProgress = generalGameProgress;
            var gameSpecificProgress = GameService.HandleThrow(generalGameProgress, dispatcher);

            //foreach (var action in actions)
            //{
            //    if (action is SelectedNextPlayerIdsAction)
            //    {
            //        participants = ((SelectedNextPlayerIdsAction)action).ParticipantsState;
            //    }
            //    dispatcher.Dispatch(action);
            //}
            var gameModelState = gameSpecificProgress.GameModel.ConvertToState();
            dispatcher.Dispatch(new GameModelChangedAction(gameModelState));

            await ShowBoardForSeconds(dispatcher);


            // save the new state after the throw
            dispatcher.Dispatch(new TriggerNewThrowPanelStateChangedAction(true, 
                gameSpecificProgress.AfterParticipantsState, gameModelState,
                gameSpecificProgress.NextThrowState)); // this will trigger ThrowPanelStateChangedAction with the new state (not current _throwPanelState.Value)
        }

        [EffectMethod]
        public async Task HandleGameButtonAction(GameButtonAction action, IDispatcher dispatcher)
        {
            var beforeStates = dataService.GetCurrentData();

            var beforeProgress = new GameProgress(
                BeforeThrowState: beforeStates.Status?.ThrowPanelState,
                BeforeParticipantsState: beforeStates.Status.ParticipantsState,
                AfterThrowState: throwPanelState.Value,
                AfterParticipantsState: beforeStates.Status.ParticipantsState,
                StartParams: dataService.StartParams,
                GameModel: beforeStates.Status.GameState.ConvertToModel(),
                NextThrowState: null);
            var afterProgress = GameService.HandleGameButton(action.CallbackName, beforeProgress, dispatcher);

            dispatcher.Dispatch(new TriggerNewThrowPanelStateChangedAction(true,
                afterProgress.AfterParticipantsState, afterProgress.GameModel.ConvertToState(),
                afterProgress.NextThrowState)); // this will trigger ThrowPanelStateChangedAction with the new state (not current _throwPanelState.Value)
        }

        private async Task ShowBoardForSeconds(IDispatcher dispatcher)
        {
            dispatcher.Dispatch(new StartTimerAction(5));
            await eventAggregator.PublishAsync(new GameViewChangedMessage(GameView.Board) { Scope = EventScope.Circuit });
        }

        [EffectMethod]
        public Task HandleTriggerNewThrowPanelStateChangedAction(TriggerNewThrowPanelStateChangedAction action,
            IDispatcher dispatcher)
        {
            if (action.NextModifiedThrowPanelState != null) 
            {
                // Standardverhalten der Bahn wurde überschrieben, z.B. Bild gestellt oder sonstiges aus der game-spezifischen Logik
                dispatcher.Dispatch(new OverwriteThrowPanelStateAction(action.NextModifiedThrowPanelState));
                dispatcher.Dispatch(new ThrowPanelStateChangedAction(action.NextModifiedThrowPanelState, action.SaveToDb,
                    action.ParticipantsState, action.GameState));
            }
            else
            {
                dispatcher.Dispatch(new ThrowPanelStateChangedAction(throwPanelState.Value, action.SaveToDb,
                    action.ParticipantsState, action.GameState));
            }
                
            return Task.CompletedTask;
        }

        [EffectMethod]
        public async Task HandleConnectToHubAction(ConnectToHubAction action, IDispatcher dispatcher)
        {
            try
            {
                await sharedHubService.ConnectToHub(dispatcher);
            }
            catch (Exception ex)
            {
                logger.LogError(ex, "Failed to connect to hub");
                //dispatcher.Dispatch(new HubConnectionFailedAction(ex.Message));
            }
        }

        

        [EffectMethod]
        public async Task HandelThrowPanelStateChangedAction(ThrowPanelStateChangedAction action,
            IDispatcher dispatcher)
        {
            dispatcher.Dispatch(new SaveThrowPanelStateAction(action.State));

            dispatcher.Dispatch(new BroadcastThrowPanelStateAction(action.State));

            if (action.SaveToDb)
            {
                var username = await GetUsername();
                dataService.UpdateData(new GameStatus
                {
                    ThrowPanelState = action.State,
                    ParticipantsState = action.ParticipantsState,
                    GameState = action.GameState
                }, username);

                // here we need to invalidate _dataFilePath and _sessionStorage, because with a new throw, state data must be provided by dataservice
                DeleteAllSessionsFile(dispatcher);

                dispatcher.Dispatch(new UpdateUndoRedoStateAction());
            }
        }

        private static void DeleteAllSessionsFile(IDispatcher dispatcher)
        {
            dispatcher.Dispatch(new DeleteThrowPanelSessionAction());
            dispatcher.Dispatch(new DeleteParticipantsSessionAction());
        }

        [EffectMethod]
        public async Task HandleDeleteThrowPanelSessionAction(DeleteThrowPanelSessionAction allStatesFromSessionAction, IDispatcher dispatcher)
        {
            await sessionStorage.SetThrowPanelStateAsync(null);

            if (File.Exists(_dataFilePath))
            {
                await Task.Delay(100);
                try
                {
                    File.Delete(_dataFilePath);
                }
                catch (Exception)
                { }
            }
        }

        [EffectMethod]
        public async Task HandelLoadAllStatesFromSessionAction(LoadAllStatesFromSessionAction allStatesFromSessionAction, IDispatcher dispatcher)
        {
            dispatcher.Dispatch(new LoadThrowPanelStatesFromSessionAction());
            dispatcher.Dispatch(new LoadParticipantsStatesFromSessionAction());
            dispatcher.Dispatch(new LoadSetupStatesFromSessionAction());
            dispatcher.Dispatch(new LoadGameStatesFromDataServiceAction());
        }

        [EffectMethod]
        public async Task HandelLoadThrowPanelStatesFromSessionAction(LoadThrowPanelStatesFromSessionAction allStatesFromSessionAction, IDispatcher dispatcher)
        {
            var state = await sessionStorage.GetThrowPanelStateAsync();

            if (state == null)
            {
                try
                {
                    if (File.Exists(_dataFilePath))
                    {
                        var json = await File.ReadAllTextAsync(_dataFilePath);
                        state = JsonSerializer.Deserialize<ThrowPanelState>(json);
                    }
                }
                catch (Exception e)
                {
                    // TODO error handling
                }
            }

            if (state == null)
            {
                var data = dataService.GetCurrentData();
                if (data.Status != null)
                {
                    state = data.Status.ThrowPanelState;
                }
                

                dispatcher.Dispatch(new UpdateUndoRedoStateAction());
            }

            if (state != null)
            {
                dispatcher.Dispatch(new ThrowPanelStateLoadedAction(state));
            }
        }

        [EffectMethod]
        public async Task HandelSaveThrowPanelStateAction(SaveThrowPanelStateAction action, IDispatcher dispatcher)
        {
            await sessionStorage.SetThrowPanelStateAsync(action.State);

            try
            {
                var json = JsonSerializer.Serialize(action.State, new JsonSerializerOptions
                {
                    WriteIndented = true
                });
                await File.WriteAllTextAsync(_dataFilePath, json);
            }
            catch (Exception ex)
            {
                // TODO error handling
            }
        }

        [EffectMethod]
        public async Task HandelBroadcastThrowPanelStateAction(BroadcastThrowPanelStateAction action, IDispatcher dispatcher)
        {
            await sharedHubService.BroadcastThrowPanelState(action.State, dispatcher);
        }

        
        private async Task<string> GetUsername()
        {
            var authState = await authenticationStateProvider.GetAuthenticationStateAsync();
            var user = authState.User;
            var isAuthenticated = user.Identity?.IsAuthenticated ?? false;
            return isAuthenticated ? user.Identity?.Name : "Gast";
        }


      


    }
}