using System.Linq;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using ObjectScripts;
namespace UIScripts
{
    public class EventStamp : MonoBehaviour
    {
        // Start is called before the first frame update
        ///<summary>
        /// Manager to control
        ///</summary>
        public AbstractManager Manager { get; set; }
        ///<summary>
        /// Timeline slider
        ///</summary>
        public UnityEngine.UI.Slider Slider { get; set; }
        ///<summary>
        /// timestamp
        ///</summary>
        public double Timestamp;
        ///<summary>
        /// ReactTransform of timeline slider
        ///</summary>
        private RectTransform SliderRect;
        ///<summary>
        /// Transform of timeline slider
        ///</summary>
        private Transform SliderTransform;
        ///<summary>
        /// 
        ///</summary>
        private float leftx, minValue, maxValue, normalized;
        ///<summary>
        /// Number of events for that timestamp
        ///</summary>
        private int Ncontent = 0;
        ///<summary>
        /// Contentfield  
        ///</summary>
        [SerializeField] public GameObject ContentField;
        ///<summary>
        /// EventField
        ///</summary>
        [SerializeField] public GameObject EventField;
        ///<summary>
        /// Button to jump to timestamp
        ///</summary>
        [SerializeField] public GameObject EventButton;
        ///<summary>
        /// 
        ///</summary>
        [SerializeField] UnityEngine.UI.Scrollbar Scrollbar;
        ///<summary>
        /// 
        ///</summary>
        [SerializeField] UnityEngine.UI.ScrollRect ScrollRect;

        ///<summary>
        /// size of the contentfield
        ///</summary>
        private float size;
        ///<summary>
        /// size of one event
        ///</summary>
        private float EventFieldSize;
        ///<summary>
        /// timechunks
        ///</summary>
        private float EndChunk, StartChunk;
        private RectTransform ContentFieldRect;
        ///<summary>
        /// Stepsize for one scroll up/down press
        ///</summary>
        private float Stepsize = 30;
        ///<summary>
        /// CanavasObject to change visbility
        ///</summary>
        private Canvas CanvasObject;

        void Start()
        {
            SliderRect = Slider.GetComponent<RectTransform>();
            SliderTransform = Slider.transform;
            ContentFieldRect = ContentField.GetComponent<RectTransform>();
            CanvasObject = GetComponent<Canvas>();
        }

        // Update is called once per frame
        void Update()
        {
            //Move Timestamp on timeline

            EndChunk = (float)Manager.endChunk;
            StartChunk = (float)Manager.startChunk;

            //left slider point
            leftx = SliderTransform.localPosition.x - SliderRect.sizeDelta.x * SliderRect.pivot.x;

            //values of the slider
            minValue = Slider.minValue;
            maxValue = Slider.maxValue;
            if (float.IsInfinity(minValue) || float.IsInfinity(maxValue) || float.IsNaN(minValue) || float.IsNaN(maxValue))
            {
                minValue = 0;
                maxValue = 1;
            }
            //get normalized value of timestamp for slider
            normalized = (float)(Timestamp - minValue) / (maxValue - minValue);
            if (float.IsNaN(normalized))
                normalized = -1;
            if (float.IsInfinity(normalized))
                normalized = -1;

            if (normalized >= 0 && normalized < 1)
            {   
                //set visible and position
                CanvasObject.enabled = true;
                transform.localPosition = new Vector3(leftx + SliderRect.sizeDelta.x * normalized, 0, 0);
            }
            else
            {
                CanvasObject.enabled = false;
            }

            // }
        }
        ///<summary>
        /// On button pressed
        ///</summary>
        public void OnEventButtonClick()
        {
            Manager.JumpToTimestamp(Timestamp);
            Manager.StopPressed();
        }
        ///<summary>
        /// add event to timestamp
        ///</summary>
        public void addContent(AbstractEventScript eventScript, Sprite sprite)
        {

            GameObject eventField = Instantiate(EventField, EventField.transform.position, EventField.transform.rotation, EventField.transform.parent);
            GameObject eventButton = Instantiate(EventButton, eventField.transform);
            RectTransform eventFieldRect = eventField.GetComponent<RectTransform>();

            EventFieldSize = eventFieldRect.sizeDelta.y;

            eventFieldRect.anchorMax = new Vector2(0.5f, 1);
            eventFieldRect.anchorMin = new Vector2(0.5f, 1);

            ContentField.GetComponent<RectTransform>().sizeDelta = new Vector2(0, Mathf.RoundToInt(Ncontent * EventFieldSize));
            size = ContentField.GetComponent<RectTransform>().sizeDelta.y;
            eventFieldRect.localPosition -= new Vector3(0, Mathf.RoundToInt(Ncontent * EventFieldSize + EventFieldSize / 2), 0);

            eventButton.GetComponent<UnityEngine.UI.Image>().sprite = sprite;
            eventField.SetActive(true);
            eventButton.SetActive(true);

            Ncontent += 1;
        }
        ///<summary>
        /// On scrollbar up pressed
        ///</summary>
        public void ScrollbarUP()
        {
            ContentField.GetComponent<RectTransform>().anchoredPosition = ContentField.GetComponent<RectTransform>().anchoredPosition - new Vector2(0, Stepsize);
        }
        ///<summary>
        /// on scrollbar down pressed
        ///</summary>
        public void ScrollbarDOWN()
        {
            ContentField.GetComponent<RectTransform>().anchoredPosition = ContentField.GetComponent<RectTransform>().anchoredPosition + new Vector2(0, Stepsize);
        }

    }
}