namespace Dreamteck.Splines.Editor
{
    using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    using UnityEditor;

    public class RotationModifierEditor : SplineSampleModifierEditor
    {
        public bool allowSelection = true;
        private float addTime = 0f;

        public RotationModifierEditor(SplineUser user, SplineUserEditor parent) : base(user, parent, "_rotationModifier")
        {
            title = "Rotation Modifiers";
        }

        public void ClearSelection()
        {
            selected = -1;
        }

        public override void DrawInspector()
        {
            base.DrawInspector();
            if (!isOpen) return;
            if (GUILayout.Button("Add New Rotation"))
            {
                AddKey(addTime - 0.1f, addTime + 0.1f);
                UpdateValues();
            }
        }

        protected override void KeyGUI(SerializedProperty key)
        {
            SerializedProperty rotation = key.FindPropertyRelative("rotation");
            SerializedProperty target = key.FindPropertyRelative("target");
            SerializedProperty useLookTarget = key.FindPropertyRelative("useLookTarget");
            base.KeyGUI(key);
            if (!useLookTarget.boolValue)
            {
                EditorGUILayout.PropertyField(rotation);
            }
            EditorGUILayout.PropertyField(useLookTarget);
            if (useLookTarget.boolValue)
            {
                EditorGUILayout.PropertyField(target);
            }
        }

        protected override bool KeyHandles(SerializedProperty key, bool edit)
        {
            if (!isOpen) return false;
            bool changed = false;
            SerializedProperty start = key.FindPropertyRelative("_featherStart");
            SerializedProperty end = key.FindPropertyRelative("_featherEnd");
            SerializedProperty centerStart = key.FindPropertyRelative("_centerStart");
            SerializedProperty centerEnd = key.FindPropertyRelative("_centerEnd");
            SerializedProperty rotation = key.FindPropertyRelative("rotation");
            SerializedProperty target = key.FindPropertyRelative("target");
            SerializedProperty useLookTarget = key.FindPropertyRelative("useLookTarget");
            float position = GetPosition(start.floatValue, end.floatValue, centerStart.floatValue, centerEnd.floatValue);
            SplineSample result = new SplineSample();
            user.spline.Evaluate(position, ref result);
            if (useLookTarget.boolValue)
            {
                if (target.objectReferenceValue != null)
                {
                    Transform targetTransform = ((Transform)target.objectReferenceValue);
                    Handles.DrawDottedLine(result.position, targetTransform.position, 5f);
                    if (edit)
                    {
                        Vector3 lastPos = targetTransform.position;
                        targetTransform.position = Handles.PositionHandle(targetTransform.position, Quaternion.identity);
                        if (lastPos != targetTransform.position)
                        {
                            EditorUtility.SetDirty(targetTransform);
                            changed = true;
                        }
                    }
                }
            }
            else
            {
                Quaternion directionRot = Quaternion.LookRotation(result.forward, result.up);
                Quaternion rot = directionRot * Quaternion.Euler(rotation.vector3Value);
                SplineEditorHandles.DrawArrowCap(result.position, rot, HandleUtility.GetHandleSize(result.position));

                if (edit)
                {
                    Vector3 lastEuler = rot.eulerAngles;
                    rot = Handles.RotationHandle(rot, result.position);
                    rot = Quaternion.Inverse(directionRot) * rot;
                    rotation.vector3Value = rot.eulerAngles;
                    if (rot.eulerAngles != lastEuler)
                    {
                        changed = true;
                    }
                }
            }
            return base.KeyHandles(key, edit) || changed;
        }
    }
}