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

namespace UnityEngine.UCMobile
{
    [Serializable]
    public class MoveToTarget : UCMobileModel {

        

        [SerializeField]
        Settings m_Settings = Settings.defaultSettings;

        [Serializable]
        public struct Settings
        {
            [Tooltip("slow down range to target")]
            public float slow_down_range;
            [Tooltip("speed smooth")]
            [Range(0,1)]
            public float smooth;
            [Tooltip("Move Target")]
            public Transform target;

            public static Settings defaultSettings
            {
                get
                {
                    return new Settings
                    {
                        slow_down_range = 1,
                        smooth = 1
                    };
                }
            }
        }
        public Settings settings
        {
            get { return m_Settings; }
            set { m_Settings = value; }
        }

        public override void DoBehavier(GameObject obj)
        {
            if (settings.target == null)
                return;

            Vector3 to_target_dir = settings.target.position - obj.transform.position;

            float dist = to_target_dir.magnitude;
            float dist_weight = Mathf.Min(1.0f, dist / settings.slow_down_range);
            to_target_dir.Normalize();
            Vector3 new_dir = (settings.target.position - obj.transform.position).normalized * (1.0f - dist_weight);
            Vector3 _direction = obj.transform.forward;
            _direction += (new_dir - _direction) * Mathf.Min(1.0f, Time.deltaTime / 0.1f);
            _direction.Normalize();

            Vector3 vel = _direction * settings.smooth * dist_weight;
            obj.transform.position += vel * Time.deltaTime;
        }

        public override void Reset()
        {
            throw new NotImplementedException();
        }
    }
}