using System;
using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using Object = UnityEngine.Object;

namespace Net.Project.B.Bounds
{
    public class DrawMinimapToPng
    {
        [MenuItem("Tools/Draw Minimap To Png")]
        private static void ExportConvex()
        {
            var renderLayer = LayerMask.NameToLayer("Ignore Raycast");

            var go = Selection.activeGameObject;

            if (!go)
            {
                Debug.LogError("No object selected");
                return;
            }
            
            Debug.Log($"正在从:{go.name}创建minimap");


            var bounds = new UnityEngine.Bounds();

            var renderGroup = new GameObject();

            var children = go.GetComponentsInChildren<MeshRenderer>(true);
            for (var index = 0; index < children.Length; index++)
            {
                var renderer = children[index];
                if (index is 0)
                {
                    bounds = renderer.bounds;
                }
                else
                {
                    bounds.Encapsulate(renderer.bounds);
                }

                var instance = Object.Instantiate(renderer.gameObject, renderGroup.transform, true);
                instance.layer = renderLayer;
                foreach (var transform in instance.GetComponentsInChildren<Transform>())
                {
                    transform.gameObject.layer = renderLayer;
                }
            }

            var camera = new GameObject("MinimapCamera").AddComponent<Camera>();
            
            var position = bounds.center+Vector3.up*bounds.size.y;

            position.y = Mathf.Clamp(position.y,64,position.y);
            
            camera.transform.position = position;
            camera.transform.LookAt(bounds.center);
            camera.orthographic = true;
            camera.orthographicSize = Mathf.Max(bounds.size.x,bounds.size.y)/2;
            camera.clearFlags = CameraClearFlags.SolidColor;
            camera.backgroundColor = Color.clear;
            camera.cullingMask = LayerMask.GetMask("Ignore Raycast");
            
            var rendererTexture = new RenderTexture(1024,1024,32);
            camera.targetTexture = rendererTexture;
            camera.Render();
            
            var texture = new Texture2D(rendererTexture.width, rendererTexture.height, TextureFormat.RGBA32, false);
            RenderTexture.active = rendererTexture;
            texture.ReadPixels(new Rect(0, 0, rendererTexture.width, rendererTexture.height), 0, 0);
            texture.Apply();
            RenderTexture.active = null;
            
            //camera.targetTexture = null;
            //Object.DestroyImmediate(rendererTexture);
            
            var path =      EditorUtility.SaveFilePanel(
                "Save Minimap To Png",
                "",
                "Minimap.png",
                "png");


            if (string.IsNullOrEmpty(path) is false)
            {
                var png = texture.EncodeToPNG();
                System.IO.File.WriteAllBytes(path,png);
            }

            camera.targetTexture = null;
            
            Object.DestroyImmediate(renderGroup);
            Object.DestroyImmediate(rendererTexture);
            Object.DestroyImmediate(texture);
            Object.DestroyImmediate(camera.gameObject);
            
           Debug.Log(bounds);
        }
        
    }

}