using System;
using System.Collections;
using UnityEngine;
using Random = UnityEngine.Random;

public class Enemy : Entity
{
	public SpriteRenderer sprite;
	private float currentState = 1;
	public float colorChangeSpeed;
	[Header("Movement")]
	private float currentMovement;
	public float moveSpeed;
	public float moveSpeedDelta;

	private void Start()
	{
		moveSpeed += Random.Range(-moveSpeedDelta, moveSpeedDelta);
	}

	private void Update()
	{
		if (!isStalled)
		{
			foreach (Ability ability in abilities)
			{
				ability.direction = WaveManager.instance.GetRandomPlayerPoint();
				bool success = ability.TryAbility();
				if (!success && ability.currentCooldown <= 0.5f && currentState >= 1f)
				{
					currentState = 0f;
					StartCoroutine(ImminentAttackAnim());
				}
			}
		}
	}

	protected override void OnDeath()
	{
		base.OnDeath();
		Destroy(gameObject);
		WaveManager.instance.enemiesInPlay.Remove(this);
		WaveManager.instance.UpdateKills();
	}

	private IEnumerator ImminentAttackAnim()
	{
		while (currentState < 1)
		{
			currentState += Time.deltaTime * colorChangeSpeed;
			sprite.color = Color.Lerp(Color.red, Color.white, currentState);
			yield return null;
		}
	}

	public IEnumerator MoveToPosition(Vector3 moveDirection)
	{
		while (currentMovement < 1)
		{
			currentMovement += Time.deltaTime * moveSpeed;
			if (currentMovement >= 1)
			{
				isStalled = false;
			}
			transform.position = Vector3.Lerp(WaveManager.instance.enemySpawnPoint.position, moveDirection, currentMovement);
			yield return null;
		}
	}
}