using BeWo.ServiceProxy;
using BeWo.View.Controls.AI;
using BeWo.View.Detail.AI;
using BeWo.ViewModel.View.AI;
using BS.Shared;
using BS.Shared.DataContracts.Feature.AI;
using DevExpress.Mvvm;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;

namespace BeWo.ViewModel.Controls.AI
{
	public enum AiChatButtonState
	{
		Hidden,
		Normal,
		Loading,
		Warning,
		Disabled
	}

	public class AiChatButtonViewModel : AbstractBaseVM
	{
		private bool canExecute;
		private AiChatButtonState buttonState;

		public AiActionType ActionType { get; protected set; }
		public bool IsFavoritenOpen { get; set; }
		public List<AiMenuItemTemplate> AssistentCommands { get; protected set; }

		public virtual bool IsHistoryEnabled => false;

		public bool IsEnabled => BeWoApp.AppSettings.ShowAI && BeWoApp.HasLoggedOnUserRight(GetUserRightType());

		public bool CanExecute
		{
			get => canExecute;
			set => SetProperty(ref canExecute, value, nameof(CanExecute));
		}
		public AiChatButtonState ButtonState
		{
			get => buttonState;
			set {
				if (!SetProperty(ref buttonState, value, nameof(ButtonState)))
					return;

				FirePropertyChanged(nameof(IsContextSizeTooBig));
			}
		}

		public Func<AiViewContextDC> GetAiVisualContext { get; set; }

		public AiPromptbausteinSelectionComplexViewModel AllPromptsViewModel { get; set; }

		public DelegateCommand OpenConversationPopupCommand { get; protected set; }
		public DelegateCommand OpenAllPromptsPopupCommand { get; protected set; }
		public DelegateCommand OpenFavoritePromptsPopupCommand { get; protected set; }

		public bool IsContextSizeTooBig => ButtonState == AiChatButtonState.Warning;

		public AiChatButtonViewModel(AiActionType aiActionType)
		{
			ActionType = aiActionType;

			if (!IsEnabled)
				return;

			canExecute = true;

			OpenConversationPopupCommand = new DelegateCommand(OpenConversationPopup);
			OpenAllPromptsPopupCommand = new DelegateCommand(OpenAllPromptsPopup);
			OpenFavoritePromptsPopupCommand = new DelegateCommand(OpenFavoritePromptsPopup);
		}

		public void CheckContextSize()
		{
			if (!IsEnabled)
			{
				return;
			}

			ButtonState = AiChatButtonState.Loading;
			var context = GetAiVisualContext();
			if (context != null)
			{
				var context2 = context.References.ToDictionary(kv => kv.Key, kv => kv.Value.ToList());

				ServiceFacade.DoAiEnhancedServiceAsnyc(x => x.CheckContextSize(ActionType, context2, null),
					isValid =>
					{
						if (isValid)
							ButtonState = AiChatButtonState.Normal;
						else
							ButtonState = AiChatButtonState.Warning;
					},
					(exp) => ButtonState = AiChatButtonState.Disabled);
			}
		}

		private protected void OpenConversationPopup()
		{
			var context = GetAiVisualContext();

			var chat_viewmodel = VMFactory.CreateAiConversationChatViewModel(ActionType, context.References, (long)context.Primary, true);

			BeWoApp.MainControl.WindowService.Show(chat_viewmodel);
		}

		private protected void OpenAllPromptsPopup()
		{
			BeWoApp.MainControl.WindowService.Show(AllPromptsViewModel);
		}

		private protected void OpenFavoritePromptsPopup()
		{
			IsFavoritenOpen = true;
			FirePropertyChanged(nameof(IsFavoritenOpen));
		}

		private UserRightType GetUserRightType()
		{
			switch (ActionType)
			{
				case AiActionType.ServiceRecord:
					break;
				case AiActionType.ServiceRecordConversation:
					return UserRightType.AiModuleServiceRecordChat;
				case AiActionType.ServiceRecordDocumentation:
					return UserRightType.AiModuleServiceRecordDocu;
				default:
					break;
			}

			throw new InvalidOperationException($"UserRightType '{ActionType}' not implemented");
		}
	}

	public class AiMenuItemTemplate
	{
		public string Icon { get; set; }
		public string Name { get; set; }
		public DelegateCommand<AiConversationMessageVM> Command { get; set; }
	}
}