using Chickensoft.AutoInject;
using Chickensoft.Collections;
using Chickensoft.GodotNodeInterfaces;
using Chickensoft.Introspection;
using Chickensoft.LogicBlocks;
using Chickensoft.SaveFileBuilder;
using Godot;

namespace GameJamDungeon
{
  public interface IPlayer : ICharacterBody3D
  {
    PlayerStatInfo PlayerStatInfo { get; }

    PlayerLogic PlayerLogic { get; }

    PlayerData PlayerData { get; }

    public Vector3 GetGlobalInputVector();
  }

  [Meta(typeof(IAutoNode))]
  public partial class Player : CharacterBody3D, IPlayer, IProvide<PlayerLogic>
  {
    public override void _Notification(int what) => this.Notify(what);

    PlayerLogic IProvide<PlayerLogic>.Value() => PlayerLogic;

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

    [Dependency]
    public IGameRepo GameRepo => this.DependOn<IGameRepo>();

    [Dependency]
    public ISaveChunk<GameData> GameChunk => this.DependOn<ISaveChunk<GameData>>();

    /// <summary>Rotation speed (quaternions?/sec).</summary>
    [Export(PropertyHint.Range, "0, 100, 0.1")]
    public float RotationSpeed { get; set; } = 12.0f;

    /// <summary>Player speed (meters/sec).</summary>
    [Export(PropertyHint.Range, "0, 100, 0.1")]
    public float MoveSpeed { get; set; } = 8f;

    /// <summary>Player speed (meters^2/sec).</summary>
    [Export(PropertyHint.Range, "0, 100, 0.1")]
    public float Acceleration { get; set; } = 4f;

    [Export]
    public PlayerStatInfo PlayerStatInfo { get; set; }

    public PlayerLogic.Settings Settings { get; set; } = default!;

    public PlayerLogic PlayerLogic { get; set; } = default!;

    public PlayerData PlayerData { get; set; } = default!;

    public PlayerLogic.IBinding PlayerBinding { get; set; } = default!;

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

    [Node] public AnimatedSprite2D SwordSlashAnimation { get; set; } = default!;

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

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

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

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

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

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

    [Node] public IArea3D CollisionDetector { get; set; } = default!;

    private AutoProp<double> _currentHP { get; set; } = default!;

    private AutoProp<int> _currentVT { get; set; } = default!;

    public void Initialize()
    {
      AnimationPlayer.AnimationFinished += OnAnimationFinished;
    }

    public void Setup()
    {
      Settings = new PlayerLogic.Settings(RotationSpeed, MoveSpeed);

      PlayerLogic = new PlayerLogic();
      PlayerLogic.Set(this as IPlayer);
      PlayerLogic.Set(Settings);
      PlayerLogic.Set(AppRepo);
      PlayerLogic.Set(GameRepo);
      PlayerLogic.Set(PlayerData);

      GameRepo.SetPlayerGlobalPosition(GlobalPosition);
      GameRepo.PlayerGlobalPosition.Sync += OnPlayerPositionUpdated;

      _currentHP = new AutoProp<double>(PlayerStatInfo.MaximumHP);
      _currentVT = new AutoProp<int>(PlayerStatInfo.MaximumVT);
      _currentHP.Sync += OnHPChanged;
      _currentVT.Sync += OnVTChanged;

      HPBar.MaxValue = PlayerStatInfo.MaximumHP;
      HPBar.Value = _currentHP.Value;
      VTBar.MaxValue = PlayerStatInfo.MaximumVT;
      VTBar.Value = _currentVT.Value;

      HealthTimer.Timeout += OnHealthTimerTimeout;
      CollisionDetector.AreaEntered += OnEnemyHitBoxEntered;
    }

    public void OnResolved()
    {
      PlayerBinding = PlayerLogic.Bind();

      PlayerBinding
        .Handle((in PlayerLogic.Output.MovementComputed output) =>
        {
          Transform = Transform with { Basis = output.Rotation };
          Velocity = output.Velocity;
        })
        .Handle((in PlayerLogic.Output.Animations.Attack output) =>
        {
          var weaponInfo = (WeaponInfo)GameRepo.EquippedWeapon.Info;
          var attackSpeed = (float)weaponInfo.AttackSpeed;
          AnimationPlayer.SetSpeedScale(attackSpeed);
          AnimationPlayer.Play("attack");
          if (weaponInfo.WeaponTags.Contains(WeaponTag.SelfDamage))
            _currentHP.OnNext(_currentHP.Value - 5);
        })
        .Handle((in PlayerLogic.Output.ThrowItem output) =>
        {
          ThrowItem();
        });

      this.Provide();
      PlayerLogic.Start();

      SwordSlashAnimation.Position = GetViewport().GetVisibleRect().Size / 2;
    }

    public void OnReady()
    {
      SetPhysicsProcess(true);
    }

    private void OnEnemyHitBoxEntered(Area3D area)
    {
      if (area is IHitbox hitBox)
      {
        if (_currentHP.Value > 0)
        {
          var enemy = hitBox.GetParent<IEnemy>();
          var isCriticalHit = false;
          var rng = new RandomNumberGenerator();
          rng.Randomize();
          var roll = rng.Randf();
          if (roll <= enemy.EnemyStatInfo.Luck)
            isCriticalHit = true;
          var damage = DamageCalculator.CalculateEnemyDamage(hitBox.Damage, PlayerStatInfo, enemy.EnemyStatInfo, GameRepo.EquippedArmor.ArmorInfo, isCriticalHit);
          _currentHP.OnNext(_currentHP.Value - damage);
          GD.Print($"Player hit for {damage} damage.");
        }
      }
    }

    public void OnPhysicsProcess(double delta)
    {
      PlayerLogic.Input(new PlayerLogic.Input.PhysicsTick(delta));

      var attackIsPressed = Input.IsActionJustPressed(GameInputs.Attack);
      if (attackIsPressed && !GameRepo.IsWithinDialogueSpace)
        PlayerLogic.Input(new PlayerLogic.Input.Attack());

      MoveAndSlide();

      PlayerLogic.Input(new PlayerLogic.Input.Moved(GlobalPosition));
    }

    public Vector3 GetGlobalInputVector()
    {
      var rawInput = Input.GetVector(GameInputs.MoveLeft, GameInputs.MoveRight, GameInputs.MoveUp, GameInputs.MoveDown);

      var input = new Vector3
      {
        X = rawInput.X,
        Z = rawInput.Y
      };
      return input with { Y = 0f };
    }

    public void ThrowItem()
    {
      var itemScene = GD.Load<PackedScene>("res://src/items/throwable/ThrowableItem.tscn");
      var throwItem = itemScene.Instantiate<IThrowableItem>();
      GetTree().Root.AddChildEx(throwItem);
      throwItem.GlobalPosition = GameRepo.PlayerGlobalPosition.Value;
      throwItem.GlobalRotation = GlobalRotation;
      throwItem.AnimationPlayer.Play("throw");
    }

    public void OnAnimationFinished(StringName animation)
    {
      GD.Print("Attack finished");
      PlayerLogic.Input(new PlayerLogic.Input.AttackAnimationFinished());
    }

    public void OnExitTree()
    {
      PlayerLogic.Stop();
      PlayerBinding.Dispose();
      AnimationPlayer.AnimationFinished -= OnAnimationFinished;
    }

    private void OnEquippedWeaponChanged(Weapon info) => Hitbox.Damage = ((WeaponInfo)info.Info).Damage;

    private void OnHPChanged(double newHP)
    {
      HPNumber.Text = Mathf.RoundToInt(newHP).ToString();
      HPBar.Value = newHP;

      if (newHP <= 0.0)
        PlayerLogic.Input(new PlayerLogic.Input.Killed());
    }

    private void OnVTChanged(int newVT)
    {
      VTNumber.Text = newVT.ToString();
      VTBar.Value = newVT;
    }

    private void OnPlayerPositionUpdated(Vector3 globalPosition) => GlobalPosition = globalPosition;

    private void OnHealthTimerTimeout()
    {
      if (_currentVT.Value > 0)
        _currentVT.OnNext(_currentVT.Value - 1);
      else
        _currentHP.OnNext(_currentHP.Value - 1);
    }
  }
}