gather-and-defend/Assets/Scripts/Entity.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public abstract class Entity : LevelObject
{
    //Attribut
    [SerializeField]
    private int _hp;
    [SerializeField]
    private float _speed;
    [SerializeField]
    private int _attack_damage = 2;
    [SerializeField]
    private float _attack_interval = 2;
    private float _attack_speed_wait = 0f;
    private AnimationEntity _animation;
    private Shader _shaderGUItext;
	private Shader _shaderSpritesDefault;
    private SpriteRenderer[] _spriteRenderers;

    //Enemy Spotted
    private bool _isEnemyDetected = false;
    private Entity _enemy;

    //Methods
    public virtual void Start()
    {
        _spriteRenderers = GetComponentsInChildren<SpriteRenderer>();
        Animation = gameObject.AddComponent<AnimationEntity>();
    }
    public virtual void Update()
    {
        Animation.AttackSpeedMultiplier = AttackSpeedMultiplier;
        Animation.SpeedMultiplier = SpeedMultiplier;
    }
    //Start the animation of death and the fading of the entity
    public virtual void Death() 
    {
        _animation.PlayDieAnim();
        Invoke("Dying", 0.1f);
    }

    //Recursive method that fade the dying entity
    void Dying() 
    {
        foreach (SpriteRenderer renderer in _spriteRenderers)
        {
            Color currentColor = renderer.color;
            currentColor.a = currentColor.a - 0.1f; 
            renderer.color = currentColor;
        }

        if(_spriteRenderers[0].color.a > 0f) {
            Invoke("Dying", 0.1f);
        }else {
            Destroy(gameObject);
        }
        
    }

    //When hit : get damage and start a flash of light 
    public void Hit(int damage) 
    {

        _hp-=damage;

	    _shaderGUItext = Shader.Find("GUI/Text Shader");
        _shaderSpritesDefault = Shader.Find("Sprites/Default");

        foreach (SpriteRenderer renderer in _spriteRenderers)
        {
            renderer.material.shader = _shaderGUItext;
        }
        Invoke("ReturnNormalColor", 0.1f);
    }

    //End the flash of light from the method above
    void ReturnNormalColor() 
    {
        
        foreach (SpriteRenderer renderer in _spriteRenderers)
        {
            renderer.material.shader = _shaderSpritesDefault;
        }
    }

    public void Move() {
        if(!_animation.IsWalking) {
            _animation.PlayWalkAnim();
        }
    }

    //GETTERS AND SETTERS

    public abstract Vector2 RangeMultiplier { get; }
    public abstract float HpMultiplier { get; }
    public abstract float SpeedMultiplier { get; }
    public abstract float DamageMultiplier { get; }
    public abstract float AttackSpeedMultiplier { get; }

    public int Hp => (int)(_hp * HpMultiplier);

    public float Speed => _speed * SpeedMultiplier;

    public int AttackDamage => (int)(_attack_damage * DamageMultiplier);

    public float AttackInterval => _attack_interval / AttackSpeedMultiplier;

    public float AttackSpeedWait
    {
        get { return _attack_speed_wait; }
        set { _attack_speed_wait = value; }
    }

    public bool IsEnemyDetected
    {
        get { return _isEnemyDetected; }
        set { _isEnemyDetected = value; }
    }

    public Entity Enemy
    {
        get { return _enemy; }
        set { _enemy = value; }
    }

    public AnimationEntity Animation
    {
        get { return _animation; }
        set { _animation = value; }
    }

    #region [LevelManager code]
    public override bool Equals(ILevelObject other)
    {
        return other is Entity otherEntity
            && base.Equals(otherEntity)
            && otherEntity._hp == _hp
            && otherEntity._speed == _speed
            && otherEntity._attack_interval == _attack_interval
            && otherEntity._attack_damage == _attack_damage;
    }
    public override Dictionary<string, object> ToDictionary()
    {
        var dict = base.ToDictionary();

        dict[nameof(_hp)] = _hp;
        dict[nameof(_speed)] = _speed;
        dict[nameof(_attack_interval)] = _attack_interval;
        dict[nameof(_attack_damage)] = _attack_damage;

        return dict;
    }
    public override void LoadDictionary(Dictionary<string, object> dict)
    {
        base.LoadDictionary(dict);

        _hp = dict[nameof(_hp)].ToInt();
        _speed = dict[nameof(_speed)].ToFloat();
        _attack_interval = dict[nameof(_attack_interval)].ToFloat();
        _attack_damage = dict[nameof(_attack_damage)].ToInt();
    }
    #endregion
}