using SHADE;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SHADE_Scripting.Gameplay.AIBehaviour.AIRework
{
    public class AILineOfSight:Script
    {
        public GameObject player;

        public float range = 2.0f;
        [Tooltip("Angle between player and forward to be within sight")]
        public float angle = 30.0f;

        [Tooltip("For debug")]
        public float angleBetween = 0.0f;

        [Tooltip("For debug")]
        public float distance = 0.0f;

        public float heightLimit = 1.0f;

        public Vector3 rayOffset;

        
        public bool withinRange;
        public bool withinSight;


        public Vector3 lastFoundPos;
        public float lastFoundTimer = 0.0f;

        protected override void update()
        {
            if (player == GameObject.Null)
                return;

            Transform transform = GetComponent<Transform>();
            Transform playerTransform = player.GetComponent<Transform>();
            Collider playerCollider = player.GetComponent<Collider>();

            withinRange = false;
            withinSight = false;
            

            if(transform && playerTransform && playerCollider)
            {
                Vector3 pos = transform.GlobalPosition + rayOffset;
                Vector3 playerPos = playerTransform.GlobalPosition ;
                Vector3 d = playerPos - pos;
                distance = d.GetMagnitude();
                if(distance < range)
                {
                    Vector3 fwdHorizontal = transform.Forward;
                    fwdHorizontal.y = 0;
                    fwdHorizontal.Normalise();

                    Vector3 dHorizontal = d;
                    dHorizontal.y = 0;
                    

                    float dot = Vector3.Dot(fwdHorizontal, dHorizontal);
                    angleBetween = SHADE.Math.Rad2Deg * MathF.Acos(dot / (dHorizontal.GetMagnitude()));
                    if (angleBetween < angle && playerPos.y < pos.y + heightLimit)
                    {
                        withinRange = true;
                        withinSight = true;
                        Ray sightRay = new Ray(pos, d.GetNormalised());
                        List<RaycastHit> hitResults = Physics.Raycast(sightRay, distance,false, (ushort)65535);

                        foreach(RaycastHit hit in hitResults)
                        {
                            if (hit.Hit && hit.Other != player)
                            {
                                Debug.Log("AI LOS: HIT OTHER");
                                withinSight = false;
                                break;
                            }
                        }
                    }
                }

                if (withinSight == true)
                {
                    lastFoundPos = playerTransform.GlobalPosition;
                    lastFoundTimer = 0.0f;
                }
                else
                {
                    lastFoundTimer += Time.DeltaTimeF;
                }

            }


            


        }



    }
}