#pragma strict

enum ZombieState { Active, Inactive };
var state : ZombieState = ZombieState.Inactive;

@Header("Настройки зомби")
var hp : float = 100;
var zombieDeadPrefab : GameObject;
@Space(8)
var armLength : float = 1.5;
var radius : float = 16;
var detectionTreshold : float = 1;
var maxInterest : float = 15;

// Локальные переменные
private var target : Transform;
private var interest : float;

private var agent : NavMeshAgent;
private var animator : Animator;
private var head : Transform;

private var canAttack : boolean = true;

function Start () {
    // Базовая настройка
    agent = GetComponent.<NavMeshAgent>();
    animator = GetComponent.<Animator>();
    head = transform.Find("Armature/Spin/Head");
    
    animator.SetInteger("Run ID", Random.Range(0, 2));
    animator.SetTrigger("Sleep");
}

function Update () {
    StateMachine();
    
    if ((Input.GetKeyDown("e")) || (MobileInput.GetButtonDown("Jump"))) Die();
}

function StateMachine () {
    switch (state) {
     case ZombieState.Active :
      ActiveState();
      break;
  case ZombieState.Inactive :
   InactiveState();
   break;
    }
}

function ActiveState () {
    if (Vector3.Distance(transform.position, target.position) > radius) {
  GoToSleep();
  return;
    }
    
    switch (target.tag) {
  case "Player" :
   RunToTarget();
   AttackTarget();
   break;
  default :
   if (interest <= 0) {
    GoToSleep();
    return;
   }
   
   interest -= Time.deltaTime;
   RunToTarget();
   break;
    }
}

function InactiveState () {
    
}

function GoToSleep () {
    target = null;
    interest = 0;
    agent.ResetPath();
    animator.SetTrigger("Sleep");
    state = ZombieState.Inactive;
}

function SetTarget (tg : Transform) {
    target = tg;
    if (state != ZombieState.Active) animator.SetTrigger("Run");
    state = ZombieState.Active;
}

function RunToTarget () {
    agent.SetDestination(target.position);
    animator.SetFloat("Blend", agent.velocity.magnitude / agent.speed);
}

function AttackTarget () {
    if ((Vector3.Distance(transform.position, target.position) <= armLength) && (canAttack)) {
  animator.SetInteger("Attack ID", Random.Range(0, 3));
  animator.SetTrigger("Attack");
  canAttack = false;
    }
}

function SetCanAttack () {
    canAttack = true;
}

function Hit () {
    if (target == null) return;
}

function Die () {
    var dead : ZombieDead = Instantiate(zombieDeadPrefab, transform.position, transform.rotation).GetComponent.<ZombieDead>();
    
    dead.zombie = transform;
    dead.zombieMaterial = GetComponentInChildren.<SkinnedMeshRenderer>().sharedMaterial;
    dead.zombieVelocity = agent.velocity;
    dead.SetupMyself();
    
    Destroy(gameObject);
}

function OnTriggerEnter (other : Collider) {
    if ((state == ZombieState.Active) && (target.tag == "Player")) return;
    
    if (other.tag == "Player") {
  SetTarget(other.transform);
  return;
    }
    
    if (other.attachedRigidbody == null) return;
    if (other.attachedRigidbody.velocity.magnitude < detectionTreshold) return;
    
    if (target == null) {
  SetTarget(other.transform);
  interest = maxInterest;
    }
    
    if (other.attachedRigidbody.velocity.magnitude < target.GetComponent.<Rigidbody>().velocity.magnitude) return;
    
    SetTarget(other.transform);
    interest = maxInterest;
}