using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;

namespace RimWorldAnimationStudio
{
    public class AnimationTimeline : MonoBehaviour, IPointerClickHandler
    {
        public int actorID;
        public KeyframeSlider keyframeSliderPrefab;

        private Transform anchorTransform;

        public void Initialize(int actorID)
        {
            anchorTransform = transform.parent;
            this.actorID = actorID;

            PawnAnimationClip clip = Workspace.GetPawnAnimationClip(actorID);
            clip.BuildSimpleCurves();

            foreach (KeyframeSlider slider in GetComponentsInChildren<KeyframeSlider>())
            { RemovePawnKeyFrame(slider.keyframeID);}

            foreach (PawnKeyframe keyframe in clip.Keyframes)
            { AddPawnKeyFrame(keyframe.keyframeID); }

            /*int keyframeCount = clip.keyframes.Count;
            int childCount = GetComponentsInChildren<KeyframeSlider>().Count();

            for (int i = 0; i < Mathf.Max(keyframeCount, childCount); i++)
            {
                // Add new keyframe sliders as required
                if (i >= childCount)
                { AddPawnKeyFrame(clip.keyframes[i].keyframeID); }

                // Get objects to update
                KeyframeSlider keyframeSlider = GetComponentsInChildren<KeyframeSlider>()[i];

                // Update values
                if (i < keyframeCount)
                { keyframeSlider.Initialize(this, actorID, clip.keyframes[i].keyframeID); }

                // Remove excess objects as required
                else
                { RemovePawnKeyFrame(GetComponentsInChildren<KeyframeSlider>()[i].keyframeID); }
            }*/
        }

        public void AddPawnKeyFrame(int keyframeID)
        {
            KeyframeSlider keyframeSlider = Instantiate(keyframeSliderPrefab, transform);
            keyframeSlider.Initialize(this, actorID, keyframeID);
        }

        public void RemovePawnKeyFrame(int keyframeID)
        {
            KeyframeSlider keyframeSlider = GetComponentsInChildren<KeyframeSlider>().FirstOrDefault(x => x.keyframeID == keyframeID);
            Destroy(keyframeSlider?.gameObject);
        }

        public void Update()
        {
            if (Workspace.ActorID == actorID)
            { GetComponent<Image>().color = Constants.ColorGoldYellow; }

            else
            { GetComponent<Image>().color = Constants.ColorMidGrey; }
        }

        public void InitiateUpdateOfGhostFrames()
        {
            //if (AnimationController.Instance.IsTimelineDirty()) return;

            BroadcastMessage("UpdateGhostFrames");
        }

        public void OnMoveTimeline(int delta)
        {
            int? siblingIndex = anchorTransform.parent.GetComponentsInChildren<AnimationTimeline>()?.ToList()?.IndexOf(this);
            int? siblingCount = anchorTransform.parent.GetComponentsInChildren<AnimationTimeline>()?.ToList()?.Count();

            if (siblingIndex != null && siblingCount != null && MoveAnimationTimeline(siblingIndex.Value, delta))
            { AnimationController.Instance.Initialize(); }
        }

        public bool MoveAnimationTimeline(int startIndex, int delta)
        {
            if (startIndex + delta < 0 || startIndex + delta >= Workspace.GetCurrentAnimationStage().AnimationClips.Count)
            { Debug.Log("Cannot move animation timeline - movement would exceed bounds"); return false; }

            Actor actor = Workspace.animationDef.Actors[startIndex];
            Workspace.animationDef.Actors[startIndex] = Workspace.animationDef.Actors[startIndex + delta];
            Workspace.animationDef.Actors[startIndex + delta] = actor;

            PawnAnimationClip clip = Workspace.GetPawnAnimationClip(startIndex);
            Workspace.GetCurrentAnimationStage().AnimationClips[startIndex] = Workspace.GetCurrentAnimationStage().AnimationClips[startIndex + delta];
            Workspace.GetCurrentAnimationStage().AnimationClips[startIndex + delta] = clip;

            Workspace.ActorID = startIndex + delta;

            Workspace.RecordEvent("Timeline move");

            return true;
        }

        public void OnPointerClick(PointerEventData eventData)
        {
            Workspace.ActorID = actorID;
            Workspace.keyframeID.Clear();
        }
    }
}