using Assets.StreetLight.Poco;
using Assets.StreetLight.Scripts;
using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

namespace Assets.StreetLight
{
    public class PersonVisualizer : MonoBehaviour
    {
        PersonManager PersonManager => personManagerLazy.Value;
        Lazy<PersonManager> personManagerLazy;

        public GameObject boundingBoxPrefab;

        IDictionary<int, GameObject> markers = new Dictionary<int, GameObject>();

        private void Awake()
        {
            personManagerLazy = new Lazy<PersonManager>(FindObjectOfType<PersonManager>);
        }

        GameObject[] spheres;

        void Start()
        {
            spheres = new GameObject[] { GameObject.CreatePrimitive(PrimitiveType.Sphere), GameObject.CreatePrimitive(PrimitiveType.Sphere) };
        }

        void Update()
        {
            int count = 0;
            foreach (var person in PersonManager.Persons.OrderBy(p => p.Id))
            {
                GameObject sphere = spheres[count];
                var unityPosition = person.GetUnityPosition();
                sphere.transform.position = new Vector3(unityPosition.x, unityPosition.y, unityPosition.z);
                count++;
            }
        }

        float GroundPositionToSceneCoordinate(float minValue, float actualValue)
        {
            return 0;
        }

        private void ReturnBoxToPool(int id, RectTransform bbox)
        {
            bbox.gameObject.SetActive(false);
            bbox.name = "Unused";

            bboxPool.Push(bbox.gameObject);

            if (liveBBoxes.ContainsKey(id))
            {
                liveBBoxes.Remove(id);
            }
            else
            {
                Debug.LogError("Tried to remove object ID " + id + " from active bboxes, but it wasn't in the dictionary.");
            }
        }

        private Dictionary<int, RectTransform> liveBBoxes = new Dictionary<int, RectTransform>();
        private Dictionary<int, Color> idColorDict = new Dictionary<int, Color>();

        private Stack<GameObject> bboxPool = new Stack<GameObject>();

        /// <summary>
        /// Returs the RectTransform within the GameObject (instantiated from boundingBoxPrefab) that represents the provided DetectedObject.
        /// If none exists, it retrieves one from the pool (or instantiates a new one if none is available) and
        /// sets it up with the proper ID and colors.
        /// </summary>
        private RectTransform GetBBoxForObject(Person dobj)
        {
            if (!liveBBoxes.ContainsKey(dobj.Id))
            {
                GameObject newbox = GetAvailableBBox();
                //newbox.transform.SetParent(canvas.transform, false);
                newbox.name = "Object #" + dobj.Id;

                Color col;
                if (idColorDict.ContainsKey(dobj.Id))
                {
                    col = idColorDict[dobj.Id];
                }
                else
                {
                    col = GetNextColor();
                    idColorDict.Add(dobj.Id, col);
                }

                BBox2DHandler boxhandler = newbox.GetComponent<BBox2DHandler>();
                if (boxhandler)
                {
                    boxhandler.SetColor(col);
                    boxhandler.SetID(dobj.Id);
                }


                RectTransform newrecttrans = newbox.GetComponent<RectTransform>();
                if (!newrecttrans)
                {
                    Debug.LogError("BBox prefab needs a RectTransform in the root object.");
                    return null;
                }

                liveBBoxes[dobj.Id] = newrecttrans;
                return newrecttrans;
            }
            else return liveBBoxes[dobj.Id];

        }

        public List<Color> boxColors = new List<Color>()
    {
        new Color(.231f, .909f, .69f, 1),
        new Color(.098f, .686f, .816f, 1),
        new Color(.412f, .4f, .804f, 1),
        new Color(1, .725f, 0f, 1),
        new Color(.989f, .388f, .419f, 1)
    };

        private int nextColorIndex = 0;

        private Color GetNextColor()
        {
            if (boxColors.Count == 0)
            {
                return new Color(.043f, .808f, .435f, 1);
            }

            if (nextColorIndex >= boxColors.Count)
            {
                nextColorIndex = 0;
            }

            Color returncol = boxColors[nextColorIndex];

            nextColorIndex++;


            return returncol;
        }

        /// <summary>
        /// Gets an available GameObject (instantiated from boundingBoxPrefab) from the pool,
        /// or instantiates a new one if none are available.
        /// </summary>
        /// <returns></returns>
        private GameObject GetAvailableBBox()
        {
            if (bboxPool.Count == 0)
            {
                GameObject newbbox = Instantiate(boundingBoxPrefab);
                newbbox.transform.SetParent(transform, false);
                bboxPool.Push(newbbox);
            }

            GameObject bbox = bboxPool.Pop();
            bbox.SetActive(true);

            return bbox;
        }
    }
}