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

public enum MovementTypes 
{
    Line,
    Circle,
    ThroughPlayer,
    Follow,
}

public class EnemyMovement : MonoBehaviour
{
    [Header("Speed")]
    public float speed = 2;
    public float range = 4;
    public MovementTypes movementType = MovementTypes.Circle;

    public Transform enemy;
    public Transform player;
    public Vector3 currentLookDirection = new Vector3(0f, 0f, 0f);
    public float timeTillNewLookDirection = 0.5f;
    public Vector3 playerStartPoint;

    [Header("Spawn")]
    public float radius = 5f;

    void Start()
    {
        float randomAngle = UnityEngine.Random.Range(0f, 2 * Mathf.PI);
        
        // Calculate the point on the perimeter of the circle
        Vector3 point = player.position + new Vector3(Mathf.Cos(randomAngle) * radius, 0.6f, Mathf.Sin(randomAngle) * radius);
        enemy.position = point;

        if (movementType == MovementTypes.ThroughPlayer)
        {
            enemy.LookAt(new Vector3(player.position.x, enemy.position.y, player.position.z));
            enemy.Rotate(180.0f, 0.0f, 180.0f, Space.World);
        }
    }

    // Update is called once per frame
    void FixedUpdate()
    {
        if (movementType == MovementTypes.Line)
        {
            enemy.position = new Vector3(Convert.ToSingle(Math.Cos(Time.time * speed)) * range, enemy.position.y, Time.deltaTime * speed);
        }
        else if (movementType == MovementTypes.Circle)
        {
            enemy.position = new Vector3(Convert.ToSingle(Math.Cos(Time.time * speed)) * range, enemy.position.y, Convert.ToSingle(Math.Sin(Time.time * speed)) * range);
        }
        else if (movementType == MovementTypes.ThroughPlayer) 
        {
            enemy.position -= Time.deltaTime * enemy.forward * speed;
        }
        else if (movementType == MovementTypes.Follow)
        {
            enemy.position -= Time.deltaTime * enemy.forward * speed;

            Vector3 newlookDirection = new Vector3(player.position.x, enemy.position.y, player.position.z);

            // if (timeTillNewLookDirection <= 0) {
            //     newlookDirection = new Vector3(player.position.x, enemy.position.y, player.position.z);
            //     timeTillNewLookDirection = 0.2f;
            // } else {
            //     newlookDirection = currentLookDirection;
            // }

            timeTillNewLookDirection -= Time.deltaTime;
            
            enemy.LookAt(Vector3.Slerp(currentLookDirection, newlookDirection, 0.1f / (100000 * 10000)));
            enemy.Rotate(180.0f, 0.0f, 180.0f, Space.World);

            currentLookDirection = newlookDirection;
        }
    }
}