using Chickensoft.AutoInject;
using Chickensoft.Collections;
using Chickensoft.GodotNodeInterfaces;
using Chickensoft.Introspection;
using Chickensoft.SaveFileBuilder;
using Godot;
using SimpleInjector;
using System;
using Zennysoft.Game.Implementation.Components;
using Zennysoft.Ma.Adapter;
using Zennysoft.Ma.Adapter.Entity;

namespace Zennysoft.Game.Ma;

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

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

  [Dependency] private IGameRepo _gameRepo => this.DependOn<IGameRepo>(() => new GameRepo());
  #endregion

  #region Save
  public ISaveChunk<PlayerData> PlayerChunk { get; set; } = default!;
  #endregion

  public HealthComponent HealthComponent { get; private set; }

  public VTComponent VTComponent { get; private set; }

  public AttackComponent AttackComponent { get; private set; }

  public DefenseComponent DefenseComponent { get; private set; }

  public ExperiencePointsComponent ExperiencePointsComponent { get; private set; }

  public LuckComponent LuckComponent { get; private set; }

  public Vector3 CurrentPosition => GlobalPosition;

  public Basis CurrentBasis => Transform.Basis;

  public IInventory Inventory { get; private set; } = default!;

  public AutoProp<EquipableItem> EquippedWeapon => _equippedWeapon;
  private AutoProp<EquipableItem> _equippedWeapon { get; set; } = new AutoProp<EquipableItem>(new Weapon());

  public AutoProp<EquipableItem> EquippedArmor => _equippedArmor;
  private AutoProp<EquipableItem> _equippedArmor { get; set; } = new AutoProp<EquipableItem>(new Armor());

  public AutoProp<EquipableItem> EquippedAccessory => _equippedAccessory;
  private AutoProp<EquipableItem> _equippedAccessory { get; set; } = new AutoProp<EquipableItem>(new Accessory());

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

  private IPlayerLogic PlayerLogic { get; set; } = default!;


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

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

  ISaveChunk<PlayerData> IProvide<ISaveChunk<PlayerData>>.Value() => PlayerChunk;
  #endregion

  #region Exports
  [ExportGroup("Movement")]
  [Export(PropertyHint.Range, "0, 100, 0.1")]
  public float RotationSpeed { get; set; } = 1.5f;

  [Export(PropertyHint.Range, "0, 100, 0.1")]
  public float MoveSpeed { get; set; } = 4f;

  [Export(PropertyHint.Range, "0, 100, 0.1")]
  public float Acceleration { get; set; } = 2f;

  [ExportGroup("Player Stats")]
  [Export(PropertyHint.Range, "1, 1000, 1")] public int InitialHP { get; set; } = 212;
  [Export(PropertyHint.Range, "0, 1000, 1")] public int InitialVT { get; set; } = 116;

  [Export(PropertyHint.Range, "1, 100, 1")] public int InitialAttack { get; set; } = 16;

  [Export(PropertyHint.Range, "1, 100, 1")] public int InitialDefense { get; set; } = 12;

  [Export(PropertyHint.Range, "1, 100, 1")] public int InitialLuck { get; set; } = 8;

  [Export]
  private bool HealthTimerIsActive = false;
  #endregion

  #region Node Dependencies
  [Node] private IAnimationPlayer AnimationPlayer { get; set; } = default!;

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

  [Node] private Area3D Hitbox { get; set; } = default!;

  [Node] private Area3D CollisionDetector { get; set; } = default!;

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

  [Node] private RigidBody3D WallCheck { get; set; } = default!;
  #endregion


  private bool flipAttack = false;

  private float _healthTimerWaitTime = 3.0f;

  private bool reduceOnTick = true;

  private float _knockbackStrength = 0.0f;
  private Vector3 _knockbackDirection = Vector3.Zero;

  #region Initialization
  public void InitializePlayerState()
  {
    Inventory = new Inventory();
    SetProcessInput(false);
    SetPhysicsProcess(false);

    HealthTimer.WaitTime = _healthTimerWaitTime;
    HealthTimer.Timeout += OnHealthTimerTimeout;
  }

  public void Setup()
  {
    var container = new SimpleInjector.Container();
    container.Register<IPlayerLogic, PlayerLogic>(Lifestyle.Singleton);

    PlayerLogic = container.GetInstance<IPlayerLogic>();
    PlayerLogic.Set(this as IPlayer);
    PlayerLogic.Set(Settings);
    PlayerLogic.Set(_gameRepo);

    Hitbox.AreaEntered += Hitbox_AreaEntered;
    CollisionDetector.AreaEntered += CollisionDetector_AreaEntered;
  }

  public void OnResolved()
  {
    Settings = new PlayerLogic.Settings() { RotationSpeed = RotationSpeed, MoveSpeed = MoveSpeed, Acceleration = Acceleration };

    PlayerChunk = new SaveChunk<PlayerData>(
      onSave: (chunk) => new PlayerData()
      {
        Inventory = Inventory
      },
      onLoad: (chunk, data) =>
      {
        Inventory = data.Inventory;
      }
    );

    PlayerBinding = PlayerLogic.Bind();

    PlayerBinding
      .Handle((in PlayerLogic.Output.ThrowItem output) =>
      {
      })
      .Handle((in PlayerLogic.Output.Move output) =>
      {
        Move(output.delta);
      });

    GameChunk.AddChunk(PlayerChunk);

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

    SetProcessInput(false);
    SetPhysicsProcess(false);
  }

  public void OnReady()
  {
    SwordSlashAnimation.Position = GetViewport().GetVisibleRect().Size / 2;
    HealthComponent = new HealthComponent(InitialHP);
    HealthComponent.HealthReachedZero += Die;

    VTComponent = new VTComponent(InitialVT);
    AttackComponent = new AttackComponent(InitialAttack);
    DefenseComponent = new DefenseComponent(InitialDefense);
    ExperiencePointsComponent = new ExperiencePointsComponent();
    LuckComponent = new LuckComponent(InitialLuck);
  }
  #endregion

  public void Activate()
  {
    SetProcessInput(true);
    SetPhysicsProcess(true);
    SetHealthTimerStatus(HealthTimerIsActive);
  }

  public void Deactivate()
  {
    SetProcessInput(false);
    SetPhysicsProcess(false);
    SetHealthTimerStatus(false);
  }

  public void Attack()
  {
    if (PlayerIsHittingGeometry())
    {
      AnimationPlayer.Play("hit_wall");
      _gameRepo.OnPlayerAttackedWall();
    }
    else
    {
      PlayAttackAnimation();
    }
  }

  public void SetHealthTimerStatus(bool isActive)
  {
    if (isActive)
      HealthTimer.Start();
    else
      HealthTimer.Stop();
  }

  public void Move(float delta)
  {
    var rawInput = GlobalInputVector;
    var strafeLeftInput = LeftStrafeInputVector;
    var strafeRightInput = RightStrafeInputVector;

    var transform = Transform;
    transform.Basis = new Basis(Vector3.Up, Settings.RotationSpeed * -rawInput.X * delta) * transform.Basis;
    var moveDirection = new Vector3(strafeRightInput - strafeLeftInput, 0, rawInput.Z).Normalized();
    var velocity = Basis * moveDirection * Settings.MoveSpeed * Settings.Acceleration;
    _knockbackStrength *= 0.9f;
    Transform = Transform with { Basis = transform.Basis };
    Velocity = velocity + (_knockbackDirection * _knockbackStrength);
    MoveAndSlide();
  }

  public void TeleportPlayer(Transform3D newTransform)
  {
    Transform = newTransform;
  }

  public void TakeDamage(Damage damage)
  {
    var damageReceived = DamageCalculator.CalculateDamage(damage, DefenseComponent.TotalDefense, ((Armor)_equippedArmor.Value).Stats.ElementalResistanceSet);
    HealthComponent.Damage(damageReceived);
  }

  public void Knockback(float impulse)
  {
    _knockbackStrength = impulse;
    _knockbackDirection = GlobalBasis.Z.Normalized();
  }

  public void LevelUp()
  {
    var rng = new RandomNumberGenerator();
    rng.Randomize();
    var hpIncrease = rng.RandiRange(3, 6);
    HealthComponent.RaiseMaximumHP(hpIncrease);
    ExperiencePointsComponent.LevelUp();
  }

  public void Die()
  {
    HealthTimer.WaitTime = _healthTimerWaitTime;
    HealthTimer.Timeout -= OnHealthTimerTimeout;
    SwordSlashAnimation.Stop();
    SetProcessInput(false);
    SetPhysicsProcess(false);
    Game.GameOver();
  }

  public override void _Input(InputEvent @event)
  {
    if (@event.IsActionPressed(GameInputs.Attack))
      Attack();
    if (@event.IsActionPressed(GameInputs.Sprint))
      Settings.MoveSpeed *= 2;
    if (@event.IsActionReleased(GameInputs.Sprint))
      Settings.MoveSpeed /= 2;
  }

  public void OnPhysicsProcess(double delta)
  {
    PlayerLogic.Input(new PlayerLogic.Input.PhysicsTick(delta));
    PlayerLogic.Input(new PlayerLogic.Input.Moved(GlobalPosition, GlobalTransform));
  }

  public void Equip(EquipableItem equipable)
  {
    if (equipable.ItemTag == ItemTag.MysteryItem)
    {
      var rerolledItem = Game.RerollItem(equipable) as EquipableItem;
      Equip(rerolledItem);
      return;
    }

    if (equipable is Weapon weapon)
    {
      Unequip(_equippedWeapon.Value);
      weapon.IsEquipped = true;
      _equippedWeapon.OnNext(weapon);
    }
    else if (equipable is Armor armor)
    {
      Unequip(_equippedArmor.Value);
      armor.IsEquipped = true;
      _equippedArmor.OnNext(armor);
    }
    else if (equipable is Accessory accessory)
    {
      Unequip(_equippedAccessory.Value);
      accessory.IsEquipped = true;
      _equippedAccessory.OnNext(accessory);
    }
    else
      throw new NotImplementedException("Item type is not supported.");
  }

  public void Unequip(EquipableItem equipable)
  {
    if (equipable is Weapon weapon)
    {
      weapon.IsEquipped = false;
      _equippedWeapon.OnNext(new Weapon());
    }
    else if (equipable is Armor armor)
    {
      armor.IsEquipped = false;
      _equippedArmor.OnNext(new Armor());
    }
    else if (equipable is Accessory accessory)
    {
      accessory.IsEquipped = false;
      _equippedAccessory.OnNext(new Accessory());
    }
    else
      throw new NotImplementedException("Item type is not supported.");
  }

  private static Vector3 GlobalInputVector
  {
    get
    {
      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 };
    }
  }

  private static float LeftStrafeInputVector => Input.GetActionStrength(GameInputs.StrafeLeft);

  private static float RightStrafeInputVector => Input.GetActionStrength(GameInputs.StrafeRight);

  private void ThrowItem()
  {
    var itemScene = GD.Load<PackedScene>("res://src/items/throwable/ThrowableItem.tscn");
    var throwItem = itemScene.Instantiate<ThrowableItem>();
    GetTree().Root.AddChildEx(throwItem);
    throwItem.GlobalPosition = CurrentPosition + new Vector3(0, 3.5f, 0);
    throwItem.GlobalRotation = GlobalRotation;
  }

  private void PlayAttackAnimation()
  {
    var attackSpeed = ((Weapon)EquippedWeapon.Value).AttackSpeed;
    AnimationPlayer.SetSpeedScale((float)attackSpeed);
    AnimationPlayer.Play("attack");
    _gameRepo.OnPlayerAttack();
  }

  private void OnExitTree()
  {
    PlayerLogic.Stop();
    PlayerBinding.Dispose();
  }

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

  private void OnHealthTimerTimeout()
  {
    if (VTComponent.CurrentVT.Value > 0)
    {
      if (((Accessory)EquippedAccessory.Value).AccessoryTag == AccessoryTag.HalfVTConsumption)
        reduceOnTick = !reduceOnTick;

      HealthComponent.Heal(1);

      if (reduceOnTick)
        VTComponent.Reduce(1);
    }
    else
      HealthComponent.Damage(1);
  }

  private void Hitbox_AreaEntered(Area3D area)
  {
    var target = area.GetOwner();
    if (target is IEnemy enemy)
      HitEnemy(enemy);
  }

  private void HitEnemy(IEnemy enemy)
  {
    var ignoreElementalResistance = ((Weapon)EquippedWeapon.Value).WeaponTag == WeaponTag.IgnoreAffinity;
    var isCriticalHit = BattleExtensions.IsCriticalHit(LuckComponent.Luck.Value);
    var element = ((Weapon)EquippedWeapon.Value).WeaponElement;
    var baseAttack = new Damage(
      (int)(AttackComponent.TotalAttack * ((Weapon)EquippedWeapon.Value).ElementalDamageBonus),
      element,
      false,
      false,
      ignoreElementalResistance);
    var damageDealt = DamageCalculator.CalculateDamage(baseAttack, enemy.DefenseComponent.TotalDefense, new ElementalResistanceSet(0, 0, 0, 0, 0));
    enemy.TakeDamage(damageDealt);

    if (((Weapon)EquippedWeapon.Value).WeaponTag == WeaponTag.Knockback && enemy is IKnockbackable knockbackable)
      knockbackable.Knockback(0.3f, -CurrentBasis.Z.Normalized());
    if (((Weapon)EquippedWeapon.Value).WeaponTag == WeaponTag.SelfDamage)
      TakeDamage(new Damage(5, ElementType.None, false, true, true));

    _gameRepo.OnPlayerAttackedEnemy();
  }

  private void CollisionDetector_AreaEntered(Area3D area)
  {
    if (area.GetParent() is InventoryItem inventoryItem)
    {
      var isAdded = Inventory.TryAdd(inventoryItem);
      if (isAdded)
      {
        _gameRepo.AnnounceMessageOnMainScreen($"{inventoryItem.ItemName} picked up.");
        inventoryItem.QueueFree();
      }
      else
        _gameRepo.AnnounceMessageOnMainScreen($"Could not pick up {inventoryItem.ItemName}.");
    }
    if (area.GetParent() is DroppedItem droppedItem)
    {
      var isAdded = Inventory.TryAdd(droppedItem.Item);
      if (isAdded)
      {
        _gameRepo.AnnounceMessageOnMainScreen($"{droppedItem.Item.ItemName} picked up.");
        droppedItem.QueueFree();
      }
      else
        _gameRepo.AnnounceMessageOnMainScreen($"Could not pick up {droppedItem.Item.ItemName}.");
    }
    if (area.GetParent() is ThrownItem thrownItem)
    {
      var isAdded = Inventory.TryAdd(thrownItem.ItemThatIsThrown);
      if (isAdded)
      {
        _gameRepo.AnnounceMessageOnMainScreen($"{thrownItem.ItemThatIsThrown.ItemName} picked up.");
        thrownItem.QueueFree();
      }
      else
        _gameRepo.AnnounceMessageOnMainScreen($"Could not pick up {thrownItem.ItemThatIsThrown.ItemName}.");
    }
    if (area.GetParent() is Restorative restorative)
    {
      _gameRepo.OnRestorativePickedUp(restorative);
      restorative.QueueFree();
    }
  }

  private bool PlayerIsHittingGeometry()
  {
    var collisions = WallCheck.GetCollidingBodies();
    return collisions.Count > 0;
  }

  private void WallCheck_BodyEntered(Node body)
  {
    GD.Print("Hit wall");
    AnimationPlayer.Stop();
  }
}