using System.Buffers;
using System.Globalization;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using ObjectScripts;
using CSVReader;
using System.Linq;
namespace UIScripts
{


    public class UIEvents : MonoBehaviour
    {
        // Start is called before the first frame update
        [SerializeField] AbstractManager ManagerObject;
        [SerializeField] GameObject GameVelocityTextObject;
        [SerializeField] GameObject TimeLineObject;
        [SerializeField] AbstractEventHandler EventHandler;
        [SerializeField] GameObject UICamera;
        [SerializeField] Canvas UICanvas;
        [SerializeField] GameObject Radar;
        [SerializeField] GameObject EventButtonPrefab;
        [SerializeField] List<Sprite> EventButtonImages;
        [SerializeField] GameObject EventDropdownPrefab;
        [SerializeField] GameObject EventListDropdownPrefab;
        [SerializeField] UnityEngine.UI.InputField ChunkStartInputField;
        [SerializeField] UnityEngine.UI.InputField ChunkEndInputField;


        private UnityEngine.UI.Text GameVelocityText;


        private UnityEngine.UI.Slider GameTimelineSlider;
        [SerializeField] UnityEngine.UI.Text TimestampText;
        private bool running;
        private bool DraggingSlider;
        private Canvas ParentCanvas;

        private Vector2 RadarSize;
        private UnityEngine.UI.Image RadarImage;
        private Texture2D RadarTexture;
        private Color[] clearArray;
        private Color[] RadarPoint;
        private Color[] RadarCenter;

        private List<GameObject> EventButtons;

        private float Radarradius;
        private RectTransform SliderRectTransform;
        private RectTransform TimeLineObjectRectTransform;
        private RectTransform CanvasRectTransform;


        private Dictionary<double, EventTimestamp> EventTimestamps;


        void Start()
        {
            EventTimestamps = new Dictionary<double, EventTimestamp>();
            EventButtons = new List<GameObject>();
            // CanvasRectTransform = UICanvas.GetComponent<RectTransform>();
            // TimeLineObjectRectTransform = TimeLineObject.GetComponent<RectTransform>();
            // TimeLineObjectRectTransform.sizeDelta = new Vector2(CanvasRectTransform.sizeDelta.x, TimeLineObjectRectTransform.sizeDelta.y);

            // RectTransform radarRect = Radar.GetComponent<RectTransform>();
            // RadarSize = radarRect.sizeDelta;
            // SetupRadar(RadarSize, 100);
            // SetUpSliderValues();
            running = true;
            DraggingSlider = false;

            StartCoroutine(ChangeSlider());
        }
        private void SetUpSliderValues()
        {
            SliderRectTransform = this.TimeLineObject.GetComponent<UnityEngine.UI.Slider>().GetComponent<RectTransform>();

        }
        public void SetupRadar(Vector2 radarSize, float radius)
        {
            Radarradius = radius;
            RadarImage = Radar.GetComponent<UnityEngine.UI.Image>();
            RadarTexture = new Texture2D((int)radarSize.x, (int)radarSize.y);
            RadarImage.material.mainTexture = RadarTexture;




            clearArray = new Color[(int)(RadarSize.x * RadarSize.y)];
            for (int i = 0; i < clearArray.Length; i++)
            {
                clearArray[i] = new Color(1, 1, 1, 0f);
            }
            RadarPoint = new Color[25];
            RadarCenter = new Color[25];
            for (int i = 0; i < RadarPoint.Length; i++)
            {
                RadarPoint[i] = Color.red;
                RadarCenter[i] = Color.black;
            }

        }
        private void OnDestroy()
        {
            running = false;
        }

        ///<summary>
        /// Coroutine.Updates the Slider every ManagerObject.UpdateRateInSeconds.
        ///
        ///</summary>
        private IEnumerator ChangeSlider()
        {
            double startChunk;
            double endChunk;
            while (running)
            {
                //if the slider isn't dragged
                if (!DraggingSlider)
                {
                    //get the Slider 
                    this.GameTimelineSlider = this.TimeLineObject.GetComponent<UnityEngine.UI.Slider>();
                    startChunk = ManagerObject.startChunk;
                    endChunk = ManagerObject.endChunk;
                    //Get the timestamps
                    float gameTimeStamp = (float)this.ManagerObject.GameTimestamp;
                    float minTimeStamp = double.IsNaN(startChunk) ? (float)this.ManagerObject.EarliestTimestamp : (float)startChunk;
                    float maxTimeStamp = double.IsNaN(endChunk) ? (float)this.ManagerObject.NewestTimestamp : (float)endChunk;

                    // gameTimeStamp = float.IsNaN(gameTimeStamp) ? 0 : gameTimeStamp;
                    // minTimeStamp = float.IsPositiveInfinity(minTimeStamp) ? 0 : minTimeStamp;
                    // maxTimeStamp = float.IsNegativeInfinity(maxTimeStamp) ? 0 : maxTimeStamp;
                    //set the Values of the slider
                    // Maybe normalize it to 0-1 
                    this.GameTimelineSlider.maxValue = maxTimeStamp;
                    this.GameTimelineSlider.minValue = minTimeStamp;
                    // this.GameTimelineSlider.value = gameTimeStamp;
                    this.GameTimelineSlider.SetValueWithoutNotify(gameTimeStamp);
                    // print(this.GameTimelineSlider.normalizedValue.ToString());
                }
                yield return new WaitForSecondsRealtime(this.ManagerObject.UpdateRateInSeconds);

            }

        }

        // Update is called once per frame
        void Update()
        {

            // Show the current Veloctiy 
            this.GameVelocityText = GameVelocityTextObject.GetComponent<UnityEngine.UI.Text>();
            this.GameVelocityText.text = string.Format("{0}{1}", ManagerObject.forward ? "" : "-", ManagerObject.GameVelocity.ToString());
            //Show the current Gametimestamp
            // this.TimestampText = GameObject.Find("TimestampText").GetComponent<UnityEngine.UI.Text>();
            this.TimestampText.text = this.GameTimelineSlider.value.ToString("0.00") + " : " + this.ManagerObject.NewestTimestamp.ToString("0.00");
            //---------------------------------------------
            List<AbstractEventScript> eventList = EventHandler.EventList;
            Transform camera = UICamera.transform;


            // RadarTexture.SetPixels(clearArray);
            // RadarTexture.SetPixels((int)RadarSize.x / 2, (int)RadarSize.y / 2, 5, 5, RadarCenter);
            // RadarTexture.Apply();
            this.GameTimelineSlider = this.TimeLineObject.GetComponent<UnityEngine.UI.Slider>();

            for (int i = 0; i < eventList.Count; i++)
            {
                AbstractEventScript e = eventList[i];
                HandleEventButtons(e);

                // if (EventInRadar(e, camera.position, Radarradius))
                    // DrawEventOnRadar(camera, e);
            }


            RadarTexture.Apply();
        }
        private void addEventToEventDropdown(uint id, int type, double timestamp)
        {
            UnityEngine.UI.Dropdown dropdown = EventListDropdownPrefab.GetComponent<UnityEngine.UI.Dropdown>();

            string optionText = id.ToString() + ") " + "Type: " + type.ToString() + "timestamp: " + timestamp.ToString();
            UnityEngine.UI.Dropdown.OptionData option = new UnityEngine.UI.Dropdown.OptionData(optionText);
            dropdown.options.Add(option);
        }
        public void ScrollbarUP()
        {
            UnityEngine.UI.Scrollbar scrollbar = EventListDropdownPrefab.GetComponentInChildren<UnityEngine.UI.Scrollbar>();
            UnityEngine.UI.Dropdown dropdown = EventListDropdownPrefab.GetComponent<UnityEngine.UI.Dropdown>();
            int size = dropdown.options.Count;

            if (size > 0)
            {
                float stepsize = 1 / (float)size;
                //Debug.LogError(stepsize);
                scrollbar.value = scrollbar.value + stepsize;

            }


        }
        public void ScrollbarDOWN()
        {
            UnityEngine.UI.Scrollbar scrollbar = EventListDropdownPrefab.GetComponentInChildren<UnityEngine.UI.Scrollbar>();
            UnityEngine.UI.Dropdown dropdown = EventListDropdownPrefab.GetComponent<UnityEngine.UI.Dropdown>();
            int size = dropdown.options.Count;

            if (size > 0)
            {
                float stepsize = 1 / (float)size;
                //Debug.LogError(stepsize);
                scrollbar.value = scrollbar.value - stepsize;

            }
        }
        public void EventListJumpButtonPressed()
        {
            UnityEngine.UI.Dropdown dropdown = EventListDropdownPrefab.GetComponent<UnityEngine.UI.Dropdown>();
            if (dropdown.options.Count > 0)
            {

                string optionText = dropdown.options[dropdown.value].text;
                int id = int.Parse(optionText.Split(')')[0]);
                AbstractEventScript ev = EventHandler.EventList.Find(e => e.ID == id);

                if (ev != null)
                {
                    OnEventButtonClick(ev);
                }

            }


        }
        private void HandleEventButtons(AbstractEventScript e)
        {
            Transform GameTimeLineSliderTransform = this.GameTimelineSlider.transform;
            double timestamp = e.Event.TimestampStart;
            uint id = e.ID;
            int type = (int)e.Event.Type;
            EventTimestamp eventTimestamp;

            if (this.EventTimestamps.TryGetValue(e.Event.TimestampStart, out eventTimestamp))
            {
                if (!eventTimestamp.EventIDs.Contains(id))
                {
                    eventTimestamp.addEvent(e, EventButtonImages[type], () => OnEventButtonClick(e));
                    addEventToEventDropdown(id, type, timestamp);
                }

            }
            else
            {
                GameObject obj = Instantiate(this.EventDropdownPrefab);
                obj.transform.SetParent(this.transform.parent);
                obj.transform.localPosition = Vector3.zero;
                eventTimestamp = new EventTimestamp(timestamp, obj, this.GameTimelineSlider);
                this.EventTimestamps.Add(timestamp, eventTimestamp);

            }
            eventTimestamp.SetEventButtonPositon(e, this.UICamera);
        }
        private void SetEventButtonPositon(AbstractEventScript e, GameObject button)
        {
            Transform GameTimeLineSliderTransform = this.GameTimelineSlider.transform;
            Vector3 buttonPos = button.transform.localPosition;
            double timestamp = e.Event.TimestampStart;

            Vector2 leftCord = new Vector2(GameTimeLineSliderTransform.localPosition.x - SliderRectTransform.sizeDelta.x * SliderRectTransform.pivot.x, GameTimeLineSliderTransform.localPosition.y - SliderRectTransform.sizeDelta.y * SliderRectTransform.pivot.y);
            float minValue = this.GameTimelineSlider.minValue;
            float maxValue = this.GameTimelineSlider.maxValue;
            if (float.IsInfinity(minValue) || float.IsInfinity(maxValue) || float.IsNaN(minValue) || float.IsNaN(maxValue))
            {
                minValue = 0;
                maxValue = 1;
            }
            float normalized = (float)(timestamp - minValue) / (maxValue - minValue);
            if (float.IsNaN(normalized))
                normalized = -1;
            if (float.IsInfinity(normalized))
                normalized = -1;

            if (normalized >= 0 && normalized < 1)
            {
                // if (!button.GetComponent<UnityEngine.UI.Button>().enabled ||
                // !button.GetComponent<UnityEngine.UI.Image>().enabled)
                // {
                //     button.GetComponent<UnityEngine.UI.Button>().enabled = true;
                //     button.GetComponent<UnityEngine.UI.Image>().enabled = true;
                // }
                button.transform.localPosition = new Vector3(leftCord.x + SliderRectTransform.sizeDelta.x * normalized, leftCord.y, 0);
            }
            else
            {
                button.transform.position = new Vector3(0, 0, this.UICamera.transform.position.z);
                // button.GetComponent<UnityEngine.UI.Button>().enabled = false;
                // button.GetComponent<UnityEngine.UI.Image>().enabled = false;
            }

        }

        private void OnEventButtonClick(AbstractEventScript e)
        {
            this.GameTimelineSlider.SetValueWithoutNotify((float)e.Event.TimestampStart);
            ManagerObject.JumpToTimestamp((float)e.Event.TimestampStart);
            ManagerObject.StopPressed();
        }


        private bool EventInRadar(AbstractEventScript e, Vector3 cameraPosition, float radius)
        {
            Vector2 cameraPosition2D = new Vector2(cameraPosition.x, cameraPosition.z);
            Vector3 e3 = e.EventPoint.transform.position;
            return Vector2.Distance(cameraPosition2D, new Vector2(e3.x, e3.z)) < radius;

        }
        public void BeginDrag()
        {
            this.DraggingSlider = true;
        }

        public void TimelineValueChanged()
        {
            if (!DraggingSlider)
            {
                float newValue = this.GameTimelineSlider.value;
                ManagerObject.JumpToTimestamp(newValue);
            }

        }


        public void ChunkStartInputFieldEndEdit()
        {
            double startValue = double.Parse(ChunkStartInputField.text, NumberStyles.Float);
            this.ManagerObject.SetChunkStarttimestamp(startValue);

        }
        public void ChunkEndInputFieldEndEdit()
        {
            double endValue = double.Parse(ChunkEndInputField.text, NumberStyles.Float);
            this.ManagerObject.SetChunkEndtimestamp(endValue);
        }
        public void StopDrag()
        {
            this.GameTimelineSlider = this.TimeLineObject.GetComponent<UnityEngine.UI.Slider>();
            //Calculate the new timestamp and set the Gametimestamp 
            float newValue = this.GameTimelineSlider.value;

            this.GameTimelineSlider.SetValueWithoutNotify(newValue);
            ManagerObject.JumpToTimestamp(newValue);
            this.DraggingSlider = false;

            //Right now the objects will move to the new Place
            //Should implement a function that will directly set the "new" positions.
            //Also while dragging the simulation doesn't stop. Dont know if that should be changed.
        }

        public void PlayPressed()
        {
            ManagerObject.PlayPressed();
        }
        public void StopPressed()
        {
            ManagerObject.StopPressed();
        }
        public void ReversePressed()
        {
            ManagerObject.ReversePressed();
        }
        public void PlusPressed()
        {
            ManagerObject.PlusPressed();
        }
        public void MinusPressed()
        {
            ManagerObject.MinusPressed();
        }
    }
}