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

//* General Comments or Finished Tasks
//TODO Tasks left to be done for game
//! Bugs or Issues
//? Questions or Suggestions

//TODO AI Script for the Stick Beating Game
//* AI for enemies to run away from the character once in range
//* AI should change direction every few seconds to make it harder for the player to hit them
//TODO AI should not go into a direction within the player's range
//* If player is not in range, AI should move randomly

public class AIScript : MonoBehaviour
{
    private bool runningCoroutine = false;
    public GameObject player;
    public NavMeshAgent agent;

    //* Patroling
    public Vector3 walkPoint;
    public bool walkPointSet;
    public float walkPointRange;

    //* States
    public bool playerInSightRange =  false;

    void Start()
    {

        player = GameObject.Find("Capsule");   
        agent = GetComponent<NavMeshAgent>();
    }

    // Update is called once per frame
    void Update()
    {
        if(!playerInSightRange) Patroling();
        if(playerInSightRange) Running();
    }

    private void Patroling()
    {
        agent.speed = 3.5f;
        if(!walkPointSet) SetWalkPointPatroling();

        if(walkPointSet)
            agent.SetDestination(walkPoint);

        Vector3 distanceToWalkPoint = transform.position - walkPoint;

        if(distanceToWalkPoint.magnitude < 1f)
            walkPointSet = false;
    }

    private void SetWalkPointPatroling()
    {
        float randomZ = Random.Range(-walkPointRange, walkPointRange);
        float randomX = Random.Range(-walkPointRange, walkPointRange);

        walkPoint = new Vector3(randomX, transform.position.y, randomZ);
        walkPointSet = true;
    }
    private void Running()
    {
        agent.speed = 6f;
        if(!walkPointSet) SetWalkPointRunning();

        if(walkPointSet)
            agent.SetDestination(walkPoint);
            if(!runningCoroutine) StartCoroutine(WaitTime());

        Vector3 distanceToWalkPoint = transform.position - walkPoint;

        if(distanceToWalkPoint.magnitude < 1f)
            walkPointSet = false;

    }

    private void SetWalkPointRunning()
    {
        float randomZ = Random.Range(-walkPointRange, walkPointRange);
        float randomX = Random.Range(-walkPointRange, walkPointRange);

        walkPoint = new Vector3(randomX, transform.position.y, randomZ);

        walkPointSet = true;
    }

    IEnumerator WaitTime()
    {
        runningCoroutine = true;
        yield return new WaitForSeconds(Random.Range(2, 5));
        walkPointSet = false;
        runningCoroutine = false;
    }

    private void OnTriggerEnter(Collider other) {
        if(other.gameObject == player)
        {
            playerInSightRange = true;
        }
    }
    private void OnTriggerExit(Collider other) {
        if(other.gameObject == player)
        {
            playerInSightRange = false;
        }
    }
}