using System.Collections.Generic;
using System.IO;
using TyphoonGUIStyle;
using UnityEditor;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace TyphoonUI
{
    public class InstallerWindow : EditorWindow
    {
        private static Dictionary<UICanvas.PanelMode, GUIContent> PanelModeTips =
            new Dictionary<UICanvas.PanelMode, GUIContent>()
            {
                {
                    UICanvas.PanelMode.Single,
                    new GUIContent(nameof(UICanvas.PanelMode.Single), "单面板模式 (同层画布只可同时显示一个面板,以最新展示的为准,其它自动隐藏)")
                },
                {
                    UICanvas.PanelMode.Multiple,
                    new GUIContent(nameof(UICanvas.PanelMode.Multiple), "多面板模式 (同层画布可同时显示多个面板)")
                },
            };


        public static void Open()
        {
            var win = GetWindow<InstallerWindow>();
            win.minSize = new Vector2(480, 600);
            win.titleContent = new GUIContent("部署&安装");
            win.Show();
        }

        private void OnGUI()
        {
            var temEnable = GUI.enabled;
            GUI.enabled = !Application.isPlaying;

            var area = new Rect(Vector2.zero, position.size);
            var contentArea = area;
            contentArea.width -= 8;
            contentArea.height -= 8;
            contentArea.center = area.center;

            var setting = InstallSettingsAsset.Default;
            GUILayout.BeginArea(contentArea);

            if (Application.isPlaying)
            {
                GUILayout.Label(new GUIContent("运行模式下无法使用", Styles.IconInfo), Styles.HelpBox);
                GUILayout.Space(3);
            }

            var lab = setting.DesignWidth > setting.DesignHeight ? "设计分辨率 (横屏)" : "设计分辨率 (竖屏)";
            GUILayout.Label(lab, Styles.BoldLabel);
            GUILayout.BeginHorizontal();
            GUILayout.Label("宽", Styles.TitleBar);
            GUILayout.Label("高", Styles.TitleBar);
            GUILayout.EndHorizontal();
            GUILayout.BeginHorizontal();
            setting.DesignWidth = EditorGUILayout.IntField(setting.DesignWidth, Styles.TitleBar);
            setting.DesignHeight = EditorGUILayout.IntField(setting.DesignHeight, Styles.TitleBar);
            GUILayout.EndHorizontal();
            setting.DesignHeight = Mathf.Clamp(setting.DesignHeight, 100, 8920);
            setting.DesignWidth = Mathf.Clamp(setting.DesignWidth, 100, 8920);
            //画布设置
            GUILayout.Label("画布设置", Styles.BoldLabel);
            GUILayout.BeginHorizontal();
            GUILayout.Label("序号", Styles.TitleBar, GUILayout.Width(44));
            GUILayout.Label("画布层级", Styles.TitleBar, GUILayout.Width(160));
            GUILayout.Label("面板显示模式", Styles.TitleBar);
            GUILayout.EndHorizontal();

            var presets = setting.Presets;
            var no = 0;
            foreach (var preset in presets)
            {
                no += 1;
                GUILayout.BeginHorizontal();
                GUILayout.TextArea(no.ToString(), Styles.TitleBar, GUILayout.Width(44));
                GUILayout.TextArea($"{preset.Layer}", Styles.TitleBar, GUILayout.Width(160));
                GUILayout.Label(PanelModeTips[preset.Mode], Styles.TitleBar);
                var lastRect = GUILayoutUtility.GetLastRect();
                var enumRect = lastRect;
                enumRect.width = 50;
                enumRect.x = lastRect.xMax - enumRect.width;
                var center = enumRect.center;
                var draw = enumRect;
                draw.width -= 8;
                draw.height -= 4;
                draw.center = center;
                if (GUI.Button(draw, "修改", Styles.Btn))
                {
                    var menu = new GenericMenu();
                    foreach (var pair in PanelModeTips)
                    {
                        var mode = pair.Key;
                        menu.AddItem(new GUIContent(mode.ToString()), mode == preset.Mode,
                            () =>
                            {
                                preset.Mode = mode;
                                setting.SaveAssetWithDirty();
                            });
                    }

                    menu.ShowAsContext();
                }

                GUILayout.EndHorizontal();
            }

            GUILayout.Space(3);
            if (GUILayout.Button("安装", Styles.BtnGreen, GUILayout.Height(44)))
            {
                if (Directory.Exists(Paths.CORE_SOURCE_ROOT_PATH))
                {
                    TyphoonUIEditor.ShowMessageBox($"存在旧资源:{Paths.CORE_SOURCE_ROOT_PATH}\n是否进行覆盖?无法撤销,请做好备份", Install);
                }
                else
                {
                    Install();
                }
            }

            GUILayout.EndArea();
            GUI.enabled = temEnable;
            Repaint();
        }

        //安装
        private void Install()
        {
            var setting = InstallSettingsAsset.Default;
            var designWidth = setting.DesignWidth;
            var designHeight = setting.DesignHeight;
            var matchWidthOrHeight = 1f;
            if (designWidth < designHeight)
            {
                matchWidthOrHeight = 0;
            }

            var design = new Vector2(designWidth, designHeight);
            var presets = setting.Presets;
            if (Directory.Exists(Paths.CORE_SOURCE_ROOT_PATH))
            {
                //删除核心资源
                Directory.Delete(Paths.CORE_SOURCE_ROOT_PATH, true);
                AssetDatabase.Refresh();
            }

            TyphoonUIEditor.CreateDirectoryIfNotExist(Paths.CORE_SOURCE_ROOT_PATH);
            //创建核心资源
            GenerateEventSystem(); //EventSystem
            GenerateUICamera();    //UI相机
            foreach (var preset in presets)
            {
                GenerateCanvasPrefab(preset, design, matchWidthOrHeight);
            }

            //创建核心资源
            var coreSource = TyphoonUIEditor.LoadOrCreateIfNotExists<CoreSource>(CoreSource.PATH);
            coreSource.ReloadSource();
        }


        //生成EventSystem
        private static void GenerateEventSystem()
        {
            var path = $"{Paths.CORE_SOURCE_ROOT_PATH}/EventSystem.prefab";
            var clone = new GameObject("EventSystem");
            clone.layer = LayerMask.NameToLayer("UI");
            clone.AddComponent<EventSystem>();
            clone.AddComponent<StandaloneInputModule>();
            var prefab = PrefabUtility.SaveAsPrefabAsset(clone, path);
            AssetDatabase.Refresh();
            TyphoonUIEditor.PingObject(prefab);
            DestroyImmediate(clone);
        }

        //生成相机
        private static void GenerateUICamera()
        {
            var path = $"{Paths.CORE_SOURCE_ROOT_PATH}/UICamera.prefab";
            var clone = new GameObject("UICamera");
            clone.layer = LayerMask.NameToLayer("UI");
            var camera = clone.AddComponent<UICamera>();
            camera.Camera.nearClipPlane = -100;
            camera.Camera.farClipPlane = 1000;
            var prefab = PrefabUtility.SaveAsPrefabAsset(clone, path);
            AssetDatabase.Refresh();
            TyphoonUIEditor.PingObject(prefab);
            DestroyImmediate(clone);
        }

        //生成画布预制物
        private static void GenerateCanvasPrefab(CanvasPresetData presetData, Vector2 design, float matchWidthOrHeight)
        {
            var clone = new GameObject($"UICanvas_{presetData.Layer}");
            clone.layer = LayerMask.NameToLayer("UI");
            var canvas = clone.AddComponent<UICanvas>();
            canvas.LoadComponent();
            canvas.Layer = presetData.Layer;
            canvas.Mode = presetData.Mode;
            canvas.Canvas.planeDistance = (int)presetData.Layer;
            canvas.Canvas.sortingOrder = presetData.SortingOrder;
            canvas.Canvas.renderMode = RenderMode.ScreenSpaceCamera;
            canvas.CanvasScaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
            canvas.CanvasScaler.referenceResolution = design;
            canvas.CanvasScaler.matchWidthOrHeight = matchWidthOrHeight;
            var path = $"{Paths.CORE_SOURCE_ROOT_PATH}/{clone.name}.prefab";
            var prefab = PrefabUtility.SaveAsPrefabAsset(clone, path);
            AssetDatabase.Refresh();
            TyphoonUIEditor.PingObject(prefab);
            DestroyImmediate(clone);
        }
    }
}