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

public class EnemyHealth : MonoBehaviour
{
    [SerializeField] private int startingHealth = 3;  // The initial health of the enemy
    [SerializeField] private GameObject deathVFXPrefab;  // Prefab for the visual effects when the enemy dies
    [SerializeField] private float knockBackThrust = 15f;  // Force applied to the enemy when knocked back

    private int currentHealth;  // The enemy's current health
    private Knockback knockback;  // Reference to the knockback component
    private Flash flash;  // Reference to the flash component for damage feedback

    private void Awake() {
        flash = GetComponent<Flash>();  // Initialize the flash component
        knockback = GetComponent<Knockback>();  // Initialize the knockback component
    }

    private void Start() {
        currentHealth = startingHealth;  // Set the enemy's health to its starting value
    }

    // Method to handle damage taken by the enemy
    public void TakeDamage(int damage) {
        currentHealth -= damage;  // Reduce the enemy's health by the damage amount
        knockback.GetKnockedBack(PlayerController.Instance.transform, knockBackThrust);  // Apply knockback effect
        StartCoroutine(flash.FlashRoutine());  // Trigger the flash effect to indicate damage
        StartCoroutine(CheckDetectDeathRoutine());  // Check if the enemy has died after damage
    }

    // Coroutine to wait for the flash effect before checking for death
    private IEnumerator CheckDetectDeathRoutine() {
        yield return new WaitForSeconds(flash.GetRestoreMatTime());  // Wait for the flash duration
        DetectDeath();  // Check if the enemy is dead and handle it
    }

    // Method to handle the enemy's death
    public void DetectDeath() {
        if (currentHealth <= 0) {  // If the enemy's health is zero or below
            Instantiate(deathVFXPrefab, transform.position, Quaternion.identity);  // Instantiate the death visual effects
            GetComponent<PickUpSpawner>().DropItems();  // Spawn any items the enemy should drop
            Destroy(gameObject);  // Destroy the enemy game object
        }
    }
}