namespace GameJamDungeon;

using Chickensoft.AutoInject;
using Chickensoft.Introspection;
using Godot;
using System;
using static GameJamDungeon.GameLogic.State;

[Meta(typeof(IAutoNode))]
public partial class Game : Node3D, IGame
{
  public override void _Notification(int what) => this.Notify(what);

  IGameRepo IProvide<IGameRepo>.Value() => GameRepo;

  IGame IProvide<IGame>.Value() => this;

  IPlayer IProvide<IPlayer>.Value() => Player;

  IGameEventDepot IProvide<IGameEventDepot>.Value() => GameEventDepot;

  public IInstantiator Instantiator { get; set; } = default!;

  public IGameLogic GameLogic { get; set; } = default!;

  public IGameEventDepot GameEventDepot { get; set; } = default!;

  public IGameRepo GameRepo { get; set; } = default!;

  public GameLogic.IBinding GameBinding { get; set; } = default!;

  [Signal]
  public delegate void StatRaisedAlertEventHandler(string statRaisedAlert);

  [Dependency] public IAppRepo AppRepo => this.DependOn<IAppRepo>();

  #region Nodes
  [Node] private IMap Map { get; set; } = default!;

  [Node] private InGameUI InGameUI { get; set; } = default!;

  [Node] private IFloorClearMenu FloorClearMenu { get; set; } = default!;

  [Node] private DeathMenu DeathMenu { get; set; } = default!;

  [Node] private IPauseMenu PauseMenu { get; set; } = default!;

  [Node] private InGameAudio InGameAudio { get; set; } = default!;

  [Node] private Timer DoubleEXPTimer { get; set; } = default!;

  [Node] private IPlayer Player { get; set; } = default!;
  #endregion

  public RescuedItemDatabase RescuedItems { get; set; } = default!;

  public void Setup()
  {
    GameRepo = new GameRepo();
    GameLogic = new GameLogic();
    GameEventDepot = new GameEventDepot();
    GameLogic.Set(GameRepo);
    GameLogic.Set(AppRepo);
    GameLogic.Set(GameEventDepot);
    GameLogic.Set(Player);
    Instantiator = new Instantiator(GetTree());
    RescuedItems = new RescuedItemDatabase();
  }

  public void OnResolved()
  {
    GameBinding = GameLogic.Bind();
    GameBinding
      .Handle((in GameLogic.Output.StartGame _) =>
      {
        InGameUI.Show();
      })
      .Handle((in GameLogic.Output.GoToOverworld _) =>
      {
        GameEventDepot.OnOverworldEntered();
      })
      .Handle((in GameLogic.Output.SetPauseMode output) => CallDeferred(nameof(SetPauseMode), output.IsPaused))
      .Handle((in GameLogic.Output.ShowPauseMenu _) =>
      {
        PauseMenu.Show();
        PauseMenu.FadeIn();
        Input.MouseMode = Input.MouseModeEnum.Visible;
        PauseMenu.SetProcessUnhandledInput(true);
      })
      .Handle((in GameLogic.Output.LoadNextFloor _) =>
      {
        Map.SpawnNextFloor();
      })
      .Handle((in GameLogic.Output.HidePauseMenu _) => { PauseMenu.Hide(); })
      .Handle((in GameLogic.Output.ExitPauseMenu _) => { PauseMenu.FadeOut(); Input.MouseMode = Input.MouseModeEnum.Visible; PauseMenu.SetProcessUnhandledInput(false); })
      .Handle((in GameLogic.Output.ShowFloorClearMenu _) => { FloorClearMenu.Show(); FloorClearMenu.FadeIn(); })
      .Handle((in GameLogic.Output.ExitFloorClearMenu _) => { FloorClearMenu.FadeOut(); })
      .Handle((in GameLogic.Output.OpenInventory _) => { InGameUI.ShowInventoryScreen(); InGameUI.InventoryMenu.SetProcessInput(true); })
      .Handle((in GameLogic.Output.HideInventory _) => { InGameUI.HideInventoryScreen(); InGameUI.InventoryMenu.SetProcessInput(false); })
      .Handle((in GameLogic.Output.ShowMiniMap _) => { InGameUI.ShowMiniMap(); })
      .Handle((in GameLogic.Output.HideMiniMap _) => { InGameUI.HideMiniMap(); })
      .Handle((in GameLogic.Output.ShowAskForTeleport _) => { GameRepo.Pause(); InGameUI.UseTeleportPrompt.FadeIn(); InGameUI.SetProcessInput(true); })
      .Handle((in GameLogic.Output.HideAskForTeleport _) => { GameRepo.Resume(); InGameUI.UseTeleportPrompt.FadeOut(); InGameUI.SetProcessInput(false); })
      .Handle((in GameLogic.Output.ShowLostScreen _) => { DeathMenu.Show(); DeathMenu.FadeIn(); })
      .Handle((in GameLogic.Output.ExitLostScreen _) => { DeathMenu.FadeOut(); });
    GameLogic.Start();

    GameLogic.Input(new GameLogic.Input.Initialize());

    this.Provide();

    PauseMenu.TransitionCompleted += OnPauseMenuTransitioned;
    PauseMenu.UnpauseButtonPressed += PauseMenu_UnpauseButtonPressed;
    InGameUI.InventoryMenu.ClosedMenu += InventoryMenu_CloseInventory;
    InGameUI.MinimapButtonReleased += Player_MinimapButtonReleased;

    InGameUI.UseTeleportPrompt.TeleportToNextFloor += UseTeleportPrompt_TeleportToNextFloor;
    InGameUI.UseTeleportPrompt.CloseTeleportPrompt += UseTeleportPrompt_CloseTeleportPrompt;

    Player.Inventory.InventoryAtCapacity += PlayerInventory_InventoryAtCapacity;
    Player.Inventory.PickedUpItem += Inventory_PickedUpItem;
    FloorClearMenu.GoToNextFloor += FloorClearMenu_GoToNextFloor;
    FloorClearMenu.SaveAndExit += FloorClearMenu_SaveAndExit;
    FloorClearMenu.TransitionCompleted += FloorClearMenu_TransitionCompleted;

    GameEventDepot.RestorativePickedUp += GameEventDepot_RestorativePickedUp;

    DoubleEXPTimer.Timeout += DoubleEXPTimer_Timeout;
  }

  public void ToggleInventory()
  {
    if (GameLogic.Value is InventoryOpened)
      GameLogic.Input(new GameLogic.Input.CloseInventory());
    else
      GameLogic.Input(new GameLogic.Input.OpenInventory());
  }

  public void ToggleMinimap()
  {
    GameLogic.Input(new GameLogic.Input.MiniMapButtonPressed());
  }

  public void FloorExitReached()
  {
    GameLogic.Input(new GameLogic.Input.AskForTeleport());
    GameEventDepot.OnTeleportEntered();
  }

  private void Inventory_PickedUpItem(string pickedUpItemName)
  {
    InGameUI.PlayerInfoUI.DisplayMessage($"{pickedUpItemName} picked up.");
  }

  public void DropItem(IInventoryItem item)
  {
    var droppedScene = GD.Load<PackedScene>("res://src/items/dropped/DroppedItem.tscn");
    var dropped = droppedScene.Instantiate<DroppedItem>();
    dropped.Item = item;
    AddChild(dropped);
    dropped.Drop();
  }

  public void ThrowItem(IInventoryItem item)
  {
    var thrownScene = GD.Load<PackedScene>("res://src/items/thrown/ThrownItem.tscn");
    var thrown = thrownScene.Instantiate<ThrownItem>();
    thrown.ItemThatIsThrown = item;
    AddChild(thrown);
    thrown.Position += new Vector3(-0.5f, 1.5f, -0.5f);
    thrown.Throw();
  }

  public void AnnounceMessageOnInventoryScreen(string message)
  {
    InGameUI.InventoryMenu.ShowMessage(message);
  }

  public void AnnounceMessageOnMainScreen(string message)
  {
    InGameUI.PlayerInfoUI.DisplayMessage(message);
  }

  public IDungeonFloor CurrentFloor => Map.CurrentFloor;

  public void EnemyDefeated(Vector3 defeatedLocation, EnemyStatResource resource)
  {
    Player.GainExp(resource.ExpFromDefeat * GameRepo.EXPRate);
  }

  private void DropRestorative(Vector3 vector)
  {
    var restorativeScene = GD.Load<PackedScene>("res://src/items/restorative/Restorative.tscn");
    var restorative = restorativeScene.Instantiate<Restorative>();
    AddChild(restorative);
    restorative.GlobalPosition = vector;
  }

  private void UseTeleportPrompt_CloseTeleportPrompt()
  {
    GameLogic.Input(new GameLogic.Input.HideAskForTeleport());
  }

  private void UseTeleportPrompt_TeleportToNextFloor()
  {
    GameLogic.Input(new GameLogic.Input.FloorExitReached());
    GameEventDepot.OnDungeonAThemeAreaEntered();
  }

  private void PauseMenu_UnpauseButtonPressed()
  {
    GameLogic.Input(new GameLogic.Input.UnpauseGame());
  }

  private void Player_PauseButtonPressed()
  {
    GameLogic.Input(new GameLogic.Input.PauseGame());
  }

  private void Player_MinimapButtonReleased()
  {
    GameLogic.Input(new GameLogic.Input.MiniMapButtonReleased());
  }

  private void FloorClearMenu_TransitionCompleted()
  {
    GameRepo.Resume();
    if (Player.EquippedWeapon.Value.ItemTags.Contains(ItemTag.BreaksOnChange))
      Player.Unequip(Player.EquippedWeapon.Value);
    if (Player.EquippedArmor.Value.ItemTags.Contains(ItemTag.BreaksOnChange))
      Player.Unequip(Player.EquippedArmor.Value);
    if (Player.EquippedAccessory.Value.ItemTags.Contains(ItemTag.BreaksOnChange))
      Player.Unequip(Player.EquippedAccessory.Value);
  }

  private void FloorClearMenu_GoToNextFloor()
  {
    GameLogic.Input(new GameLogic.Input.GoToNextFloor());
  }

  private void FloorClearMenu_SaveAndExit()
  {
    // Save
    GameLogic.Input(new GameLogic.Input.HideFloorClearMenu());
    GameLogic.Input(new GameLogic.Input.SaveGame());
  }

  private void GameEventDepot_RestorativePickedUp(Restorative obj)
    => Player.Stats.SetCurrentVT(Player.Stats.CurrentVT.Value + obj.VTRestoreAmount);

  private void SetPauseMode(bool isPaused)
  {
    if (GetTree() != null)
      GetTree().Paused = isPaused;
  }

  public async void DoubleEXP(TimeSpan lengthOfEffect)
  {
    ToggleInventory();
    InGameUI.PlayerInfoUI.DisplayMessage("Experience points temporarily doubled.");
    DoubleEXPTimer.Start(lengthOfEffect.Seconds);
    GameRepo.EXPRate = 2;
  }

  private void DoubleEXPTimer_Timeout()
  {
    DoubleEXPTimer.Stop();
    GameRepo.EXPRate = 1;
    InGameUI.PlayerInfoUI.DisplayMessage("Experience points effect wore off.");
  }

  private void PlayerInventory_InventoryAtCapacity(string rejectedItem)
  {
    InGameUI.PlayerInfoUI.DisplayMessage($"Could not pick up {rejectedItem}.");
  }

  private void InventoryMenu_CloseInventory() => GameLogic.Input(new GameLogic.Input.CloseInventory());

  public void NextFloorLoaded()
  {
    GameLogic.Input(new GameLogic.Input.HideFloorClearMenu());
  }

  private void OnPauseMenuTransitioned()
  {
    GameLogic.Input(new GameLogic.Input.PauseMenuTransitioned());
  }

  public void OnStart() => GameLogic.Input(new GameLogic.Input.StartGame());
}