using System;
using uc;
using UnityEditor;
using UnityEngine;

[CustomEditor(typeof(FMCRControl))]
[CanEditMultipleObjects]
public class MeshFilterPreview : Editor
{
    private PreviewRenderUtility _previewRenderUtility;

    SerializedProperty composerSettings;
    SerializedProperty transposerSettings;

    private void OnEnable()
    {
        composerSettings = serializedObject.FindProperty("composerSettings");
        transposerSettings = serializedObject.FindProperty("transposerSettings");
    }

    private Editor _editor;

    public override void OnInspectorGUI()
    {
        serializedObject.Update();
        DrawDefaultInspector();
        serializedObject.ApplyModifiedProperties();

        FMCRControl fmcr = target as FMCRControl;
        if (fmcr == null)
            return;
        CreateCachedEditor(composerSettings.objectReferenceValue, null, ref _editor);
        if (_editor != null)
        {
            EditorGUILayout.Separator();
            EditorGUILayout.BeginVertical("Box");
            EditorGUILayout.LabelField(composerSettings.displayName, EditorStyles.boldLabel);
            _editor.OnInspectorGUI();
            EditorGUILayout.EndVertical();
        }
        CreateCachedEditor(transposerSettings.objectReferenceValue, null, ref _editor);
        if (_editor != null)
        {
            EditorGUILayout.Separator();
            EditorGUILayout.BeginVertical("Box");
            EditorGUILayout.LabelField(transposerSettings.displayName, EditorStyles.boldLabel);
            _editor.OnInspectorGUI();
            EditorGUILayout.EndVertical();
        }
    }

    private void ValidateData()
    {
        if (_previewRenderUtility == null)
            _previewRenderUtility = new PreviewRenderUtility(true);
    }

    public override bool HasPreviewGUI()
    {
        FMCRControl fmcrControl = target as FMCRControl;
        ValidateData();
        return fmcrControl.FMCR != null;
    }

    public override bool RequiresConstantRepaint()
    {
        if (Application.isPlaying == true)
            return false;
        else
            return true;
    }

    public override void OnPreviewGUI(Rect r, GUIStyle background)
    {
        FMCRControl fmcrControl = target as FMCRControl;
        if (fmcrControl == null || fmcrControl.FMCR == null || fmcrControl.FMCR.FMCRCamera == null)
            return;

        if (Event.current.type == EventType.Repaint)
        {
            _previewRenderUtility.BeginPreview(fmcrControl.FMCR.FMCRCamera.pixelRect, background);
            _previewRenderUtility.camera.transform.position = fmcrControl.vCamPosition;
            _previewRenderUtility.camera.transform.rotation = fmcrControl.vCamRotation;
            _previewRenderUtility.camera.fieldOfView = fmcrControl.fieldOfView;
            _previewRenderUtility.camera.nearClipPlane = fmcrControl.nearClipPlane;
            _previewRenderUtility.camera.farClipPlane = fmcrControl.farClipPlane;
            _previewRenderUtility.camera.aspect = fmcrControl.FMCR.FMCRCamera.aspect;
            _previewRenderUtility.camera.Render();

            Texture resultRender = _previewRenderUtility.EndPreview();

            Camera cam = _previewRenderUtility.camera;

            Rect rr = cam.pixelRect.FitIntoRect(r);

            GUI.DrawTexture(rr, resultRender);
            fmcrControl.DrawComposerGUI(cam, rr);
        }
        if (Event.current.type == EventType.Layout)
        {
            //Debug.Log("Layout");
        }
    }

    void OnDestroy()
    {
        if (_previewRenderUtility != null)
            _previewRenderUtility.Cleanup();
    }

    [DrawGizmo(GizmoType.Selected | GizmoType.NonSelected)]
    static void DrawGizmo_FMCRControl(FMCRControl scr, GizmoType gizmoType)
    {
        Vector3 position = scr.transform.position;

        Matrix4x4 m = Gizmos.matrix;
        Gizmos.matrix = Matrix4x4.TRS(scr.vCamPosition, scr.vCamRotation, Vector3.one);
        Color hex_color;
        if (ColorUtility.TryParseHtmlString("#633F5B", out hex_color))
        {
            Gizmos.color = hex_color;
            Gizmos.DrawFrustum(new Vector3(0, 0, scr.nearClipPlane), scr.fieldOfView, scr.farClipPlane, scr.nearClipPlane, scr.CurrentAspect);
        }
        Gizmos.matrix = m;
    }

    [DrawGizmo(GizmoType.Pickable)]
    static void DrawGizmo_FreeMotionCameraRig(FreeMotionCameraRig scr, GizmoType gizmoType)
    {

    }
}