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 EnemyPatrol : MonoBehaviour
{
    public float speed;                // Speed at which the enemy patrols
    public float distance = 2f;       // Distance to check for ground
    public Transform groundCheck;     // Position to check for ground
    public LayerMask groundLayer;     // Layer mask for the ground
    private bool movingRight = true;  // Direction the enemy is moving

    void Update()
    {
        // Move the enemy horizontally based on speed
        transform.Translate(Vector2.right * speed * Time.deltaTime);

        // Cast a ray downward from the groundCheck position to detect ground
        RaycastHit2D groundRay = Physics2D.Raycast(groundCheck.position, Vector2.down, distance, groundLayer);
        
        // If no ground is detected, flip the enemy's direction
        if (groundRay.collider == null)
        {
            Flip();
        }
    }

    void Flip()
    {
        // Flip the enemy's direction based on current movement direction
        if (movingRight)
        {
            transform.eulerAngles = new Vector3(0, -180, 0); // Flip to face left
            movingRight = false;
        }
        else
        {
            transform.eulerAngles = new Vector3(0, 0, 0); // Flip to face right
            movingRight = true;
        }
    }
}