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

/*
--------------------------------------
    Project: Programing assessment
    Standard: 91906 (AS3.7) v.1
    School: Tauranga Boys' College
    Author: Rauputu Noah Phizacklea
    Date: August 2024
    Unity: 2021.3.18f
---------------------------------------
*/

public class Bullet : MonoBehaviour
{
    public float speed;                   // Speed of the bullet
    public float lifeTime;               // Time before the bullet is destroyed
    public float distance;               // Distance the bullet can travel before hitting something
    public int damage;                   // Damage dealt by the bullet
    public LayerMask solidLayers;        // Layers considered solid (for collision detection)
    public GameObject destroyEffect;     // Effect to play when the bullet is destroyed

    void Start() 
    {
        // Schedule the bullet to be destroyed after its lifetime
        Invoke("DestroyBullet", lifeTime);
    }

    void Update() 
    {
        // Cast a ray to detect collisions with solid layers
        RaycastHit2D hitInfo = Physics2D.Raycast(transform.position, transform.up, distance, solidLayers);
        if (hitInfo.collider != null)
        {
            // Check if the hit object has an EnemyHealth component and apply damage
            if (hitInfo.collider.CompareTag("Enemy"))
            {
                hitInfo.collider.GetComponent<EnemyHealth>().TakeDamage(damage);
            }

            // Check if the hit object has a BossHealth component and apply damage
            if (hitInfo.collider.CompareTag("Boss"))
            {
                hitInfo.collider.GetComponent<BossHealth>().TakeDamage(damage);
            }
            
            // Destroy the bullet if it hits something
            DestroyBullet();
        }

        // Move the bullet forward based on its speed
        transform.Translate(Vector2.right * speed * Time.deltaTime);
    }

    void DestroyBullet()
    {
        // Instantiate the destroy effect at the bullet's position
        Instantiate(destroyEffect, transform.position, Quaternion.identity);
        // Destroy the bullet game object
        Destroy(gameObject);
    }
}