using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using ObjectScripts;
using CSVReader;
namespace UIScripts
{
    public class Radar : MonoBehaviour
    {
        ///<summary>
        /// RadarDot Image
        ///</summary>
        [SerializeField] GameObject Dot;
        ///<summary>
        /// RadarCenter Image
        ///</summary>
        [SerializeField] GameObject Center;
        ///<summary>
        /// Eventhandler to get events
        ///</summary>
        [SerializeField] AbstractEventHandler EventHandler;
        ///<summary>
        /// Panel for Radar
        ///</summary>
        [SerializeField] GameObject Panel;
        ///<summary>
        /// Player gameobject to get the position
        ///</summary>
        [SerializeField] GameObject Player;
        ///<summary>
        /// scale of the map
        ///</summary>
        public float MapScale = 1;
        ///<summary>
        /// Transform of the player
        ///</summary>
        Transform PlayerTransform;
        ///<summary>
        /// Player position in x,z coordinates
        ///</summary>
        Vector2 PlayerPosition;
        ///<summary>
        /// Player rotation y in euler angle
        ///</summary>
        float EulerY;
        ///<summary>
        /// radius of the radar
        ///</summary>
        public float Radius = 100;
        ///<summary>
        /// 
        ///</summary>
        List<AbstractEventScript> EventsInRadar;
        ///<summary>
        /// Dictionary to keep track of the each event dot
        ///</summary>
        Dictionary<uint, GameObject> Dots;
        ///<summary>
        /// number of known events
        ///</summary>
        int KnownCount = 0;
        // Start is called before the first frame update
        void Start()
        {
            EventsInRadar = new List<AbstractEventScript>();
            Dots = new Dictionary<uint, GameObject>();
            Instantiate(Center, Panel.transform);

        }


        void Update()
        {
            PlayerPosition = new Vector2(Player.transform.position.x, Player.transform.position.z);
            EulerY = Player.transform.eulerAngles.y;
            for (int i = KnownCount; i < EventHandler.EventList.Count; i++)
            {
                GameObject dot = Instantiate(Dot, Panel.transform);
                dot.SetActive(false);

                Dots.Add(EventHandler.EventList[i].ID, dot);
                KnownCount++;
            }

            foreach (AbstractEventScript eventScript in EventHandler.EventList)
            {
                DrawEventOnRadar(eventScript);
            }
        }
        ///<summary>
        /// true if event in radar
        ///</summary>
        private bool EventInRadar(AbstractEventScript e)
        {
            return Vector2.Distance(e.Position2D, PlayerPosition) < Radius;

        }
        ///<summary>
        /// Draw Event on Radar
        ///</summary>
        private void DrawEventOnRadar(AbstractEventScript e)
        {
            if (EventInRadar(e) && e.EventIsVisible)
            {

                Vector2 radarPos = (e.Position2D - PlayerPosition);
                float distToObject = Vector2.Distance(e.Position2D, PlayerPosition) * MapScale;
                float deltay = Mathf.Atan2(radarPos.x, radarPos.y) * Mathf.Rad2Deg - 270 - EulerY;
                radarPos.x = distToObject * Mathf.Cos(deltay * Mathf.Deg2Rad) * -1;
                radarPos.y = distToObject * Mathf.Sin(deltay * Mathf.Deg2Rad);
                GameObject dot = Dots[e.ID];
                dot.transform.localPosition = new Vector3(radarPos.x, radarPos.y, 0);
                dot.SetActive(true);

            }
            else
            {
                GameObject dot = Dots[e.ID];
                dot.SetActive(false);
            }





        }
    }
}