using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using System.IO;
using BF;

namespace BFEditor.Resource
{	
	public class GenBlurTextureWindow : EditorWindow
	{
	    int cameraCount = 1;
	    int iteration = 4;
	    int scaleSize = 4;
	    bool bloom = false;
	    string outputPath = "";
	    string textureName = "";
	    bool needDestroy = false;
	
	    List<Camera> cameras = new List<Camera>() { null, null, null };
	
	    GenBlurTextureWindow()
	    {
	        this.titleContent = new GUIContent("生成模糊texture");
	    }
	
	    void OnGUI()
	    {
	        GUILayout.Space(10);
	
	        EditorGUILayout.LabelField("相机数量 (范围1-3)");
	        ChangableIntField("", ref cameraCount, 1, 3);
	
	        EditorGUILayout.LabelField("从场景中添加相机");
	        for (int i = 0; i < 3; i++)
	        {
	            if (i < cameraCount)
	                cameras[i] = (Camera)EditorGUILayout.ObjectField(cameras[i], typeof(Camera), true, GUILayout.Width(200));
	            else
	                cameras[i] = null;
	        }
	        GUILayout.Space(15);
	
	        EditorGUILayout.LabelField("高斯迭代次数 (范围1-16)");
	        ChangableIntField("", ref iteration, 1, 16);
	        GUILayout.Space(15);
	
	        EditorGUILayout.LabelField("缩小系数 相对于屏幕宽高 (范围1-8)");
	        ChangableIntField("", ref scaleSize, 1, 8);
	        GUILayout.Space(15);
	
	        EditorGUILayout.LabelField("是否需要bloom ? ");
	        bloom = EditorGUILayout.Toggle(bloom, GUILayout.Width(100));
	        GUILayout.Space(15);
	
	        EditorGUILayout.LabelField("产出名称");
	        textureName = EditorGUILayout.TextField(textureName, GUILayout.Width(180));
	        GUILayout.Space(15);
	
	        EditorGUILayout.LabelField("产出路径");
	        EditorGUILayout.BeginHorizontal();
	        outputPath = EditorGUILayout.TextField(outputPath, GUILayout.Width(180));
	        if (GUILayout.Button("选择", GUILayout.Width(50)))
	        {
	            OnClickSelectOutputPath();
	        }
	        EditorGUILayout.EndHorizontal();
	        GUILayout.Space(15);
	
	        if (GUILayout.Button("生成"))
	        {
	            OnClickGenerate();
	        }
	    }
	
	    void ChangableIntField(string label, ref int valueInt, int min, int max, int fieldWidth = 80, int buttonWidth = 50)
	    {
	        GUILayout.BeginHorizontal();
	        valueInt = EditorGUILayout.IntField(label, valueInt, GUILayout.Width(fieldWidth));
	        if (GUI.changed)
	        {
	            int oldValueInt = valueInt;
	
	            if (valueInt < min)
	            {
	                valueInt = min;
	            }
	
	            if (valueInt > max)
	            {
	                valueInt = max;
	            }
	        }
	        if (GUILayout.Button("-", GUILayout.Width(buttonWidth)))
	        {
	            valueInt--;
	            if (valueInt < min)
	                valueInt = min;
	        }
	        if (GUILayout.Button("+", GUILayout.Width(buttonWidth)))
	        {
	            valueInt++;
	            if (valueInt > max)
	                valueInt = max;
	        }
	        GUILayout.EndHorizontal();
	    }
	
	    void OnClickSelectOutputPath()
	    {
	        outputPath = EditorUtility.OpenFolderPanel("select output path", Application.dataPath, "");
	    }
	
	    void OnClickGenerate()
	    {
	        if (string.IsNullOrEmpty(outputPath))
	        {
	            EditorUtility.DisplayDialog("提示", "产出路径不能为空", "ok");
	            return;
	        }
	
	        if (!Directory.Exists(outputPath))
	        {
	            EditorUtility.DisplayDialog("提示", "产出路径不存在", "ok");
	            return;
	        }
	
	        if (string.IsNullOrEmpty(textureName))
	        {
	            EditorUtility.DisplayDialog("提示", "产出名称不能为空", "ok");
	            return;
	        }
	
	        var path = outputPath + "/" + textureName + ".png";
	        if (File.Exists(path))
	        {
	            EditorUtility.DisplayDialog("提示", "文件已存在", "ok");
	            return;
	        }
	
	        for (int i = cameras.Count - 1; i >= 0; i--)
	        {
	            if (cameras[i] == null)
	            {
	                cameras.RemoveAt(i);
	            }
	        }
	
	
	        var gameWidth = 0;
	        var gameHeight = 0;
	        GameViewUtils.GetCurrentGameViewSize(out gameWidth, out gameHeight);
	        if (gameWidth == 0 || gameHeight == 0)
	        {
	            EditorUtility.DisplayDialog("提示", "GameView分辨率设置异常", "ok");
	            return;
	        }
	
	        RenderTexture rt;
	        var width = gameWidth / scaleSize;
	        var height = gameHeight / scaleSize;
	        if (bloom)
	        {
	            rt = BFMain.Instance.RenderMgr.GetBlurBgWithBloom(cameras.ToArray(), width, height, iteration);
	        }
	        else
	        {
	            rt = BFMain.Instance.RenderMgr.GetBlurBg(cameras.ToArray(), width, height, iteration);
	        }
	
	        var tex = new Texture2D(rt.width, rt.height, TextureFormat.RGBA32, true);
	        tex.ReadPixels(new Rect(0, 0, rt.width, rt.height), 0, 0, false);
	        File.WriteAllBytes(path, tex.EncodeToPNG());
	        RenderTexture.ReleaseTemporary(rt);
	
	        AssetDatabase.SaveAssets();
	        AssetDatabase.Refresh();
	
	        cameras = new List<Camera>() { null, null, null };
	        needDestroy = true;
	
	        EditorUtility.DisplayDialog("提示", "生成成功", "ok");
	    }
	
	    void OnDestroy()
	    {
	        if (needDestroy)
	        {
	            var obj = GameObject.Find("BFMain");
	            DestroyImmediate(obj);
	        }
	    }
	
	    public static void ShowWindow()
	    {
	        var window = (GenBlurTextureWindow)GetWindowWithRect(typeof(GenBlurTextureWindow),
	            new Rect(Screen.width / 2, Screen.height / 2, 330, 480), true);
	        window.Show();
	    }
	}
}