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

namespace Beyond
{

    [CustomEditor(typeof(AnimSequencer))]
    public class AnimSequencerInspector : Editor
    {
        AnimSequencer helper;
        private Quaternion handleRotation;
        private const float handleSize = 0.04f;
        private const float pickSize = 0.06f;
        const int maxSeg = 100;
        const int minSeg = 10;
        Vector3[] mSegmentPoints = new Vector3[60];


        private void DrawSegments(int idx, int numSegments)
        {
            int i = 0;
            mSegmentPoints[i++] = helper.GetWorldPos(idx);
            float step = 1.0f / (float)numSegments;

            for (float j = step; j < 1f; j += step)
            {
                mSegmentPoints[i++] = helper.GetInterpolated(idx, j);
            }
            //Handles.DrawLine(v1, helper[idx + 1]);
            mSegmentPoints[i++] = helper.GetWorldPos(idx + 1);
            Handles.DrawAAPolyLine(2.0f, i, mSegmentPoints);

        }

        private void OnSceneGUI()
        {
            helper = (AnimSequencer)target;
            handleRotation = Tools.pivotRotation == PivotRotation.Local ?
                helper.transform.rotation : Quaternion.identity;
            for (int i = 0; i < helper.Count - 1; i++)
            {

                float screenSize = (Camera.current.WorldToViewportPoint(helper.GetWorldPos(i)).WithZ(0f) - Camera.current.WorldToViewportPoint(helper.GetWorldPos(i + 1)).WithZ(0f)).magnitude;
                int numSegs = (int)(screenSize * 40f);
                if (numSegs < 1) numSegs = 1;
                if (numSegs > 50) numSegs = 50;
                DrawSegments(i, numSegs);
            }
            for (int i = 0; i < helper.mSeqPoints.Length; i++)
            {
                  ShowPoint(i);
            }


        }

        private Vector3 ShowPoint(int id)
        {
            AnimSequencer.SeqPoint p = helper.mSeqPoints[id];
            Transform trans = helper.transform;
            //        Vector3 point = trans.TransformPoint(p.pos);
            Vector3 point = p.pos;
            Quaternion rot = p.rot;
            //rot = helper.transform.rotation;
            float size = HandleUtility.GetHandleSize(point) * 2f;

            if (helper.mSeqPoints[id].type == AnimSequencer.SeqPoint.PointType.STOP)
            {
                Handles.color = Color.red;
            }
            else
            {
                //Handles.color = Color.white;
                Handles.color = Color.gray;
            }
            if (Handles.Button(point, handleRotation, size * handleSize, size * pickSize, Handles.DotHandleCap))
            {
                helper.selectedIndex = id;
                Repaint();
            }

           
            GUIStyle style = new GUIStyle();
            style.fontSize = 20;
            Font f = style.font;

            Handles.Label(point, "" + id, style);
            //Handles.BeginGUI(new Rect(Screen.width - 100, Screen.height - 80, 90, 50));
            if (id == helper.selectedIndex)
            {
                EditorGUI.BeginChangeCheck();
                //EditorGUI.
                if (Tools.current == Tool.Move)
                {
                    point = Handles.DoPositionHandle(point, handleRotation);
                    if (EditorGUI.EndChangeCheck())
                    {
                        Undo.RecordObject(helper, "Move Point");
                        EditorUtility.SetDirty(helper);
                        // p.pos = trans.InverseTransformPoint(point);
                        p.pos = point;
                        helper.UpdatePointsList();
                    }
                }
                else if (Tools.current == Tool.Rotate)
                {
                    //rot = Handles.DoRotationHandle(rot, Vector3.zero);
                    rot = Handles.DoRotationHandle(rot, point);
                    if (EditorGUI.EndChangeCheck())
                    {
                        Undo.RecordObject(helper, "Rotate Point");
                        EditorUtility.SetDirty(helper);
                        p.rot = rot;
                        helper.UpdatePointsList();
                        //helper.transform.rotation = rot;
                    }
                }


            }
            return point;
        }

        public override void OnInspectorGUI()
        {
            DrawDefaultInspector();
            helper = target as AnimSequencer;
            int numPoints = helper.mSeqPoints.Length;
            GUILayout.Label("Operacje na punktach:");
            GUILayout.BeginVertical();

            for (int i = 0; i < numPoints; i++)
            {
                if (helper.selectedIndex == i)
                    GUILayout.BeginHorizontal(EditorStyles.helpBox);
                else
                    GUILayout.BeginHorizontal();

                //GUILayout.Label("" + i + ", Type: " + helper.mSeqPoints[i].type.ToString() + ", Trigger: " + helper.mAnimTriggers[helper.mSeqPoints[i].animTriggerIdx]);
                if (GUILayout.Button("" + i))
                {
                    helper.selectedIndex = i;
                }

                GUILayout.EndHorizontal();
            }
            GUILayout.EndVertical();
            if (helper.selectedIndex > -1 && helper.selectedIndex < helper.mSeqPoints.Length)
            {
                GUILayout.BeginHorizontal();
                if (helper.selectedIndex > 0 && GUILayout.Button("UP"))
                {
                    helper.MoveSelectedUp();
                }
                if (helper.selectedIndex < numPoints - 1 && GUILayout.Button("DOWN"))
                {
                    helper.MoveSelectedDown();
                }


                GUILayout.EndHorizontal();


                AnimSequencer.SeqPoint selPoint = helper.mSeqPoints[helper.selectedIndex];
                GUILayout.BeginVertical(EditorStyles.helpBox);
                GUILayout.BeginHorizontal();
                GUILayout.Label("Type: ");
                int typeNum = (int)helper.mSeqPoints[helper.selectedIndex].type;
                typeNum = EditorGUILayout.Popup(typeNum, Enum.GetNames(typeof(AnimSequencer.SeqPoint.PointType)));
                helper.SetPointType(helper.selectedIndex, (AnimSequencer.SeqPoint.PointType)Enum.ToObject(typeof(AnimSequencer.SeqPoint.PointType), typeNum));

                if (typeNum == (int)AnimSequencer.SeqPoint.PointType.STOP)
                {
                    SerializedProperty sprop = serializedObject.FindProperty("mSeqPoints");
                    sprop = sprop.GetArrayElementAtIndex(helper.selectedIndex);
                    sprop = sprop.FindPropertyRelative("onReached");
                    // EditorGUIUtility.LookLikeControls();
                    EditorGUILayout.PropertyField(sprop);
                    serializedObject.ApplyModifiedProperties();
                }
                GUILayout.EndHorizontal();
                GUILayout.EndVertical();

            }


            for (int i = 0; i < numPoints; i++)
            {

            }


            GUILayout.BeginHorizontal();

            if (GUILayout.Button("Add Point"))
            {
                Undo.RecordObject(helper, "Add Point");
                helper.AddSeqPoint();
                EditorUtility.SetDirty(helper);
            }
            if (helper.selectedIndex > -1)
            {
                if (GUILayout.Button("Remove Point"))
                {
                    Undo.RecordObject(helper, "Remove Point");
                    helper.RemoveSelected();
                    EditorUtility.SetDirty(helper);
                }
            }
            GUILayout.EndHorizontal();
        }
    }
}