using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.EventSystems;

namespace RimWorldAnimationStudio
{
    public class ActorBodyPart : MonoBehaviour, IDragHandler, IPointerClickHandler
    {
        public SpriteRenderer bodyPartRenderer;
        public ActorBody parent;

        public void OnPointerClick(PointerEventData eventData)
        {
            if (eventData.pointerCurrentRaycast.gameObject.GetComponent<ActorBodyPart>() == null)
            { return; }

            Activate();
        }

        public void OnDrag(PointerEventData eventData)
        {
            Activate();

            Vector3 mousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            PawnKeyframe keyframe = Workspace.animationDef.animationStages[Workspace.stageID].animationClips[parent.actorID].keyframes.FirstOrDefault(x => x.keyframeID == Workspace.keyframeID);

            if (Workspace.actorManipulationMode == ActorManipulationMode.Pan)
            {
                float distance = ((Vector2)mousePosition - (Vector2)transform.position).y;
                Vector3 headOffset = new Vector3(0f, 0.34f, 0f);
                headOffset = Quaternion.Euler(0, 0, keyframe.bodyAngle) * headOffset;
 
                distance = Vector2.Dot(parent.transform.up, (Vector2)(mousePosition - parent.transform.position - headOffset));

                Debug.Log(headOffset.ToString());

                Workspace.animationDef.animationStages[Workspace.stageID].animationClips[parent.actorID].keyframes.FirstOrDefault(x => x.keyframeID == Workspace.keyframeID).headBob = distance;
            }

            else if (Workspace.actorManipulationMode == ActorManipulationMode.Rotate)
            {
                float angle = Vector2.SignedAngle(Vector2.down, (Vector2)mousePosition - (Vector2)transform.position);
                Workspace.animationDef.animationStages[Workspace.stageID].animationClips[parent.actorID].keyframes.FirstOrDefault(x => x.keyframeID == Workspace.keyframeID).headAngle = angle;
            }

            else if (Workspace.actorManipulationMode == ActorManipulationMode.Face)
            {
                float angle = Vector2.SignedAngle(Vector2.up, (Vector2)mousePosition - (Vector2)transform.position);
                int facing = -Mathf.RoundToInt(angle / 90f);
                facing = facing < 0 ? facing + 4 : facing;

                Debug.Log(facing.ToString());

                Workspace.animationDef.animationStages[Workspace.stageID].animationClips[parent.actorID].keyframes.FirstOrDefault(x => x.keyframeID == Workspace.keyframeID).headFacing = facing;
            }

            PawnAnimationClip clip = Workspace.Instance.GetPawnAnimationClip(parent.actorID);
            clip.BuildSimpleCurves();
        }

        public void Activate()
        {
            Workspace.actorID = parent.actorID;

            foreach (ActorBody actorBody in AnimationController.Instance.GetComponentsInChildren<ActorBody>())
            {
                actorBody.bodyRenderer.color = new Color(1f, 1f, 1f);
                actorBody.headRenderer.color = new Color(1f, 1f, 1f);
            }

            bodyPartRenderer.color = new Color(0f, 1f, 0f);
        }
    }
}