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

namespace TyphoonUI
{
    public class UIObjectGUIDrawer : MonoBehaviour
    {
        public static Dictionary<string, Func<UIObject, bool>> OverrideDrawGUIFunc =
            new Dictionary<string, Func<UIObject, bool>>()
            {
                { "m_Script", (res) => { return true; } },
                { nameof(UIObject.NameSpace), DrawProperty_NameSpace },
                { nameof(UIObject.Nodes), DrawProperty_Nodes },
            };

        private static bool DrawProperty_Nodes(UIObject arg)
        {
            //绘制导出节点
            var nodes = arg.Nodes;
            GUILayout.Label("导出元素：", Styles.TitleBar);
            foreach (var node in nodes)
            {
                EditorGUILayout.ObjectField(node, typeof(Object), true);
            }

            return true;
        }

        private static bool DrawProperty_NameSpace(UIObject arg)
        {
            GUIDrawer.DrawMessageBox("类名生成规则:\n优先采用预制物名（如果有），其次GameObject的名字", GUILayout.Height(44));

            GUILayout.Label("命名空间:", Styles.BoldLabel);
            var txt = arg.NameSpace;
            if (string.IsNullOrEmpty(arg.NameSpace))
            {
                txt = "默认";
            }
            else
            {
                var own = !ViewNamespace.Default.Namespaces.Contains(arg.NameSpace);
                if (own)
                {
                    txt += "(missing)";
                }
            }

            GUILayout.BeginHorizontal();
            var clickNameSpace = GUILayout.Button(txt, "PopUp", GUILayout.Height(22));
            GUILayout.EndHorizontal();

            if (clickNameSpace)
            {
                var namespaces = ViewNamespace.Default.Namespaces;
                var menu = new GenericMenu();
                menu.AddItem(new GUIContent("添加新命名空间"), false, () =>
                {
                    TyphoonUIEditor.PingObject(ViewNamespace.Default);
                    Selection.activeObject = ViewNamespace.Default;
                });
                menu.AddItem(new GUIContent(), true, null);
                menu.AddItem(new GUIContent("默认"), false, () =>
                {
                    arg.NameSpace = string.Empty;
                    arg.Save();
                });
                foreach (var element in namespaces)
                {
                    if (string.IsNullOrEmpty(element))
                    {
                        continue;
                    }

                    menu.AddItem(new GUIContent(element), false, () =>
                    {
                        arg.NameSpace = element;
                        arg.Save();
                    });
                }

                menu.ShowAsContext();
            }

            return true;
        }


        public static void DrawGUI(UIObject uiObject)
        {
            GUIDrawer.DrawProperty(uiObject, (property) =>
            {
                if (OverrideDrawGUIFunc.TryGetValue(property, out var match))
                {
                    return match.Invoke(uiObject);
                }

                return false;
            });
        }
    }
}