using System;
using UnityEngine;

namespace DefaultNamespace.FSM
{
    public class IdleState : IState
    {
        private GameObject _owner;
        private PlayerController _playerController;
        
        private float _viewAngle;
        private float _cosViewAngle;

        public IdleState(GameObject owner, PlayerController player, float viewAngle)
        {
            _owner = owner;
            _playerController = player;
            _viewAngle = viewAngle;
            _cosViewAngle = Mathf.Cos(_viewAngle * Mathf.Deg2Rad);
        }
        
        public void Enter(IFiniteStateMachine ctx)
        {
            Debug.Log("Enter");
        }

        public void Update(IFiniteStateMachine ctx)
        {
            Debug.Log("Update");
            
            // option 1 view angle
            float angle = Vector3.Angle(_owner.transform.forward, _playerController.transform.position - _owner.transform.position);
            if (angle > _viewAngle) return;
            
            // option 2 trigger

            // option 3 Physics.SphereCast, Physics.BoxCast, ...
            
            if (Physics.Raycast(_owner.transform.position, _owner.transform.forward, out RaycastHit hit, 1000))
            {
                if (hit.transform.GetComponent<PlayerController>() == _playerController)
                {
                    ctx.SetState(new PlayerDetectedState(_owner, _playerController, 10.0f));
                }
            }
        }

        public void Exit(IFiniteStateMachine ctx)
        {
            Debug.Log("Exit");
        }
    }
}