using Chickensoft.AutoInject;
using Chickensoft.Collections;
using Chickensoft.Introspection;
using Godot;
using Godot.Collections;
using System;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Zennysoft.Game.Abstractions;

namespace Zennysoft.Game.Ma;

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

  [Dependency]
  public IGame Game => this.DependOn<IGame>();

  [Node]
  public AnimationPlayer AnimationPlayer { get; set; } = default!;

  public IDungeonFloor CurrentFloor { get; private set; }

  public event Action<(Vector3 Rotation, Vector3 Position)> SpawnPointCreated;

  public Array<FloorScene> FloorRoute { get; private set; }

  [Export] public Array<FloorScene> BaseRoute { get; set; }

  [Export] public Array<FloorScene> NormalEndRoute { get; set; }

  [Export] public Array<FloorScene> TrueEndRoute { get; set; }

  [Export] public Array<FloorScene> BadEndRoute { get; set; }

  public AutoProp<FloorScene> CurrentSelectedFloor { get; set; }

  public event Action FloorLoaded;

  private string _floorToLoad;

  private Stopwatch _elapsedTime;

  public override void _EnterTree()
  {
    FloorRoute = [.. BaseRoute];
    CurrentSelectedFloor = new AutoProp<FloorScene>(FloorRoute.First());
  }

  public void OnResolved()
  {
    AnimationPlayer.AnimationFinished += AnimationPlayer_AnimationFinished;
    this.Provide();
  }

  private async void AnimationPlayer_AnimationFinished(StringName animName)
  {
    if (animName == "fade_out")
      await ContinueLoadingFloor(_floorToLoad);
  }

  public void ShowMap() => FadeIn();

  private void FadeIn() => AnimationPlayer.Play("fade_in");
  private void FadeOut() => AnimationPlayer.Play("fade_out");

  public void EndCurrentGame()
  {
    CleanupCurrentFloor();
    ClearFloor();
    FloorRoute = [.. BaseRoute];
  }

  public async Task LoadFloor(FloorScene floorToLoad)
  {
    _elapsedTime = new Stopwatch();
    _elapsedTime.Start();
    Game.Pause();
    // Clean up current floor
    CleanupCurrentFloor();
    // Start loading new floor
    var filePath = FloorScenePathConverter.Convert(floorToLoad);
    _floorToLoad = filePath;
    FadeOut();
  }

  public async Task LoadFloorByPath(string filePath)
  {
    Game.Pause();
    // Clean up current floor
    CleanupCurrentFloor();
    // Start loading new floor
    _floorToLoad = filePath;
    FadeOut();
  }

  public void AddNormalRoute()
  {
    FloorRoute.AddRange(NormalEndRoute);
  }

  public void AddTrueRoute()
  {
    FloorRoute.AddRange(TrueEndRoute);
  }

  public void AddBadEndRoute()
  {
    FloorRoute.AddRange(BadEndRoute);
  }

  public void ResetToBaseRoute()
  {
    FloorRoute = [.. BaseRoute];
    CurrentSelectedFloor = new AutoProp<FloorScene>(FloorRoute.First());
  }

  private async Task ContinueLoadingFloor(string filePath)
  {
    SpawnPointCreated?.Invoke((Vector3.Forward, new Vector3(-999, -999, -999)));
    var newFloor = await LoadSceneFile(filePath);

    // New floor created, remove old floor
    ClearFloor();

    // Setup new floor
    AddChild(newFloor);
    CurrentFloor = newFloor as IDungeonFloor;
    CurrentFloor.InitializeDungeon();
    SpawnPointCreated?.Invoke(CurrentFloor.GetPlayerSpawnPoint());
    if (CurrentFloor is SpecialFloor)
      Game.ShowMinimap(false);
    else
      Game.ShowMinimap(true);
    SpawnEnemies();
    SpawnItems();
    CurrentFloor.FloorIsLoaded = true;
    FloorLoaded?.Invoke();
    _elapsedTime.Stop();
    GD.Print($"Floor loaded in {_elapsedTime.ElapsedMilliseconds}ms.");
  }

  private void CleanupCurrentFloor()
  {
    var dimmableAudio = GetTree().GetNodesInGroup("DimmableAudio").OfType<IDimmableAudioStreamPlayer>();
    foreach (var node in dimmableAudio)
      node.FadeOut();
  }

  private void ClearFloor()
  {
    try
    {
      if (CurrentFloor != null && !CurrentFloor.IsQueuedForDeletion())
        CurrentFloor?.CallDeferred(MethodName.QueueFree, []);
    }
    catch (ObjectDisposedException ex)
    {

    }
  }

  private async Task<Node> LoadSceneFile(string sceneName)
  {
    var sceneLoader = new SceneLoader();
    AddChild(sceneLoader);
    sceneLoader.LoadSceneRequest(sceneName);
    await ToSignal(sceneLoader, SceneLoader.SignalName.SceneLoaded);
    var result = sceneLoader.LoadedScene;
    sceneLoader.QueueFree();
    return result;
  }

  private void SpawnEnemies()
  {
    var monsterRooms = CurrentFloor.Rooms.OfType<MonsterRoom>();
    foreach (var room in monsterRooms)
      room.SpawnEnemies(CurrentSelectedFloor.Value.EnemySpawnTable);
  }

  private void SpawnItems()
  {
    var monsterRooms = CurrentFloor.Rooms.OfType<MonsterRoom>();
    foreach (var room in monsterRooms)
      room.SpawnItems(CurrentSelectedFloor.Value.FloorType);
  }
}