using System;
using Enemies.States;
using UnityEngine;

namespace Enemies
{
    public class BaseEnemy : Enemy
    {
        private void Awake()
        {
            this.health = 100;
            this.speed = 4;
            this.damage = 10;
            this.attackRange = .8f;
            SwitchState(States.Idle);
        }

        private void Update()
        {
            HandleStates();
            state.Execute();
        }

        private void HandleStates()
        {
            if (health <= 0)
            {
                SwitchState(States.Die);
            }

            if (target == null)
            {
                SwitchState(States.Target);
            }
            else
            {
                float dist = Vector2.Distance(target.transform.position, transform.position);
                if (currentState == States.Target)
                {
                    SwitchState(States.Path);
                }

                if (currentState == States.Path)
                {
                    if (dist <= attackRange)
                    {
                        SwitchState(target.CompareTag("Player") ? States.Attack : States.Follow);
                    }
                    else if (dist > viewRange)
                    {
                        target = null;
                        SwitchState(States.Target);
                    }
                }

                if (currentState == States.Attack)
                {
                    if(dist > attackRange)
                    {
                        SwitchState(States.Path);
                    }
                }
                
            }
        }

        public override void SwitchState(States s)
        {
            if (currentState == s) return;
            if (currentState != null) state.Exit();
            state = s switch
            {
                States.Idle => new IdleState(this),
                States.Attack => new AttackState(this),
                States.Target => new TargetState(this),
                States.Follow => new FollowState(this),
                States.Path => new PathState(this),
                States.Die => new DieState(this),
                _ => new IdleState(this)
            };

            state.Enter();
        }
    }
}