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

[CustomEditor(typeof(IsoObject))]
public class IsoObjectEditor : Editor
{
    private int textureSelected = 0;
    private List<Texture> textures = new List<Texture>();
    public override void OnInspectorGUI()
    {
        DrawDefaultInspector();

        textures.Clear();
        if (target is IsoObject)
        {
            IsoObject isoObject = target as IsoObject;
            foreach (MeshRenderer mr in isoObject.gameObject.GetComponentsInChildren<MeshRenderer>())
            {
                if (mr.sharedMaterial.shader.name == "Unlit/IsoShader")
                {
                    textures.Add(mr.sharedMaterial.GetTexture("_MainTex"));
                }
            }

            textureSelected = EditorGUILayout.Popup(Math.Min(textures.Count, textureSelected), new GUIContent("Select Texture").ToSingle().Concat(textures.Select(t => new GUIContent(t.name))).ToArray());
            if (textureSelected != 0)
            {
                IsoTextureEditor editor = EditorWindow.GetWindow<IsoTextureEditor>();
                editor.Init(textures[textureSelected - 1]);
                editor.Show();
                textureSelected = 0;
            }
         }
    }
}

[ExecuteInEditMode]
public class IsoObject : MonoBehaviour {

    public List<MeshRenderer> IsoMeshes;

    private IsoEditor isoEditor;

    private void OnEnable()
    {
        isoEditor = FindObjectOfType<IsoEditor>();
        Camera.onPreRender += PreRender;
	}

    private void PreRender(Camera cam)
    {
        //Debug.Log(cam.GetInstanceID());
        if (cam.orthographic && (isoEditor.IsoMode || cam == isoEditor.IsoCamera))
        {
            Vector3 viewPos = cam.WorldToViewportPoint(gameObject.transform.position);
            foreach (MeshRenderer mr in IsoMeshes)
            {
                mr.sharedMaterial.SetVector("_CenterPoint", new Vector4(viewPos.x, viewPos.y));
            }
        }
    }

    private void OnDisable()
    {
        Camera.onPreRender -= PreRender;
    }

    // Update is called once per frame
    void Update () {
		
	}
}