Colosseum/Assets/_Game/Scripts/Editor/RebuildDrogBehaviorAuthoringGraph.cs

using System;
using System.Collections;
using System.Linq;
using System.Reflection;

using UnityEditor;
using UnityEngine;

namespace Colosseum.Editor
{
    /// <summary>
    /// 드로그 Behavior Graph authoring 자산을 현재 BT 우선순위 구조로 재생성합니다.
    /// </summary>
    public static class RebuildDrogBehaviorAuthoringGraph
    {
        private const string GraphAssetPath = "Assets/_Game/AI/BT_Drog.asset";

        [MenuItem("Tools/Colosseum/Rebuild Drog Behavior Authoring Graph")]
        private static void Rebuild()
        {
            UnityEngine.Object graphAsset = AssetDatabase.LoadMainAssetAtPath(GraphAssetPath);
            if (graphAsset == null)
            {
                Debug.LogError($"[DrogBTRebuild] 그래프 자산을 찾을 수 없습니다: {GraphAssetPath}");
                return;
            }

            try
            {
                Type authoringGraphType = graphAsset.GetType();
                Assembly authoringAssembly = authoringGraphType.Assembly;
                Assembly runtimeAssembly = typeof(Unity.Behavior.BehaviorGraph).Assembly;

                MethodInfo createNodeMethod = authoringGraphType.BaseType?.GetMethod("CreateNode", BindingFlags.Instance | BindingFlags.Public);
                MethodInfo connectEdgeMethod = authoringGraphType.BaseType?.GetMethod("ConnectEdge", BindingFlags.Instance | BindingFlags.Public);
                MethodInfo buildRuntimeGraphMethod = authoringGraphType.GetMethod("BuildRuntimeGraph", BindingFlags.Instance | BindingFlags.Public);
                MethodInfo saveAssetMethod = authoringGraphType.BaseType?.GetMethod("SaveAsset", BindingFlags.Instance | BindingFlags.Public);
                MethodInfo setAssetDirtyMethod = authoringGraphType.BaseType?.GetMethod("SetAssetDirty", BindingFlags.Instance | BindingFlags.Public);
                MethodInfo getNodeInfoMethod = authoringAssembly.GetType("Unity.Behavior.NodeRegistry", true)
                    ?.GetMethod("GetInfo", BindingFlags.Static | BindingFlags.NonPublic);

                if (createNodeMethod == null || connectEdgeMethod == null || buildRuntimeGraphMethod == null || saveAssetMethod == null || setAssetDirtyMethod == null || getNodeInfoMethod == null)
                {
                    Debug.LogError("[DrogBTRebuild] Behavior Authoring 리플렉션 메서드를 찾지 못했습니다.");
                    return;
                }

                SerializedObject serializedObject = new SerializedObject(graphAsset);
                SerializedProperty nodesProperty = serializedObject.FindProperty("m_Nodes");
                if (nodesProperty == null)
                {
                    Debug.LogError("[DrogBTRebuild] m_Nodes 프로퍼티를 찾지 못했습니다.");
                    return;
                }

                nodesProperty.ClearArray();
                serializedObject.ApplyModifiedPropertiesWithoutUndo();

                object targetVariable = FindBlackboardVariableModel("Target");
                if (targetVariable == null)
                {
                    Debug.LogError("[DrogBTRebuild] Target 블랙보드 변수를 찾지 못했습니다.");
                    return;
                }

                object startNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.Start", true), new Vector2(420f, -620f));
                object repeatNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.RepeaterModifier", true), new Vector2(420f, -470f));
                object selectorNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.SelectorComposite", true), new Vector2(420f, -280f));

                object signatureSequence = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.SequenceComposite", true), new Vector2(-1020f, -40f));
                object downSequence = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.SequenceComposite", true), new Vector2(-620f, -40f));
                object leapSequence = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.SequenceComposite", true), new Vector2(-220f, -40f));
                object slamSequence = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.SequenceComposite", true), new Vector2(180f, -40f));
                object mainSequence = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.SequenceComposite", true), new Vector2(580f, -40f));
                object slamFallbackSequence = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.SequenceComposite", true), new Vector2(980f, -40f));
                object chaseSequence = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, runtimeAssembly.GetType("Unity.Behavior.SequenceComposite", true), new Vector2(1380f, -40f));

                object signatureRefreshNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(RefreshPrimaryTargetAction), new Vector2(-1140f, 240f));
                object signatureHasTargetNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(ValidateTargetAction), new Vector2(-1020f, 240f));
                object signatureReadyNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckSignaturePatternReadyAction), new Vector2(-900f, 240f));
                object signatureUseNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(UseSignaturePatternAction), new Vector2(-780f, 240f));

                object downSelectNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(SelectNearestDownedTargetAction), new Vector2(-740f, 240f));
                object downReadyNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckPunishPatternReadyAction), new Vector2(-620f, 240f));
                object downUseNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(UsePunishPatternAction), new Vector2(-500f, 240f));

                object leapSelectNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(SelectTargetByDistanceAction), new Vector2(-340f, 240f));
                object leapReadyNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckMobilityPatternReadyAction), new Vector2(-220f, 240f));
                object leapUseNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(UseMobilityPatternAction), new Vector2(-100f, 240f));

                object slamRefreshNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(RefreshPrimaryTargetAction), new Vector2(0f, 240f));
                object slamHasTargetNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(ValidateTargetAction), new Vector2(120f, 240f));
                object slamRangeNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckTargetInAttackRangeAction), new Vector2(240f, 240f));
                object slamTurnNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckSecondaryPatternTurnAction), new Vector2(360f, 240f));
                object slamReadyNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckSecondaryPatternReadyAction), new Vector2(480f, 240f));
                object slamUseNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(UseSecondaryPatternAction), new Vector2(600f, 240f));

                object mainRefreshNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(RefreshPrimaryTargetAction), new Vector2(520f, 240f));
                object mainHasTargetNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(ValidateTargetAction), new Vector2(640f, 240f));
                object mainRangeNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckTargetInAttackRangeAction), new Vector2(760f, 240f));
                object mainReadyNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckPrimaryPatternReadyAction), new Vector2(880f, 240f));
                object mainUseNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(UsePrimaryPatternAction), new Vector2(1000f, 240f));

                object fallbackRefreshNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(RefreshPrimaryTargetAction), new Vector2(920f, 240f));
                object fallbackHasTargetNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(ValidateTargetAction), new Vector2(1040f, 240f));
                object fallbackRangeNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckTargetInAttackRangeAction), new Vector2(1160f, 240f));
                object fallbackReadyNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(CheckSecondaryPatternReadyAction), new Vector2(1280f, 240f));
                object fallbackUseNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(UseSecondaryPatternAction), new Vector2(1400f, 240f));

                object chaseRefreshNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(RefreshPrimaryTargetAction), new Vector2(1320f, 240f));
                object chaseHasTargetNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(ValidateTargetAction), new Vector2(1440f, 240f));
                object chaseUseNode = CreateNode(graphAsset, createNodeMethod, getNodeInfoMethod, typeof(ChaseTargetAction), new Vector2(1560f, 240f));

                Connect(graphAsset, connectEdgeMethod, GetDefaultOutputPort(startNode), GetDefaultInputPort(repeatNode));
                Connect(graphAsset, connectEdgeMethod, GetDefaultOutputPort(repeatNode), GetDefaultInputPort(selectorNode));
                ConnectChildren(graphAsset, connectEdgeMethod, selectorNode, signatureSequence, downSequence, leapSequence, slamSequence, mainSequence, slamFallbackSequence, chaseSequence);

                ConnectChildren(graphAsset, connectEdgeMethod, signatureSequence, signatureRefreshNode, signatureHasTargetNode, signatureReadyNode, signatureUseNode);
                ConnectChildren(graphAsset, connectEdgeMethod, downSequence, downSelectNode, downReadyNode, downUseNode);
                ConnectChildren(graphAsset, connectEdgeMethod, leapSequence, leapSelectNode, leapReadyNode, leapUseNode);
                ConnectChildren(graphAsset, connectEdgeMethod, slamSequence, slamRefreshNode, slamHasTargetNode, slamRangeNode, slamTurnNode, slamReadyNode, slamUseNode);
                ConnectChildren(graphAsset, connectEdgeMethod, mainSequence, mainRefreshNode, mainHasTargetNode, mainRangeNode, mainReadyNode, mainUseNode);
                ConnectChildren(graphAsset, connectEdgeMethod, slamFallbackSequence, fallbackRefreshNode, fallbackHasTargetNode, fallbackRangeNode, fallbackReadyNode, fallbackUseNode);
                ConnectChildren(graphAsset, connectEdgeMethod, chaseSequence, chaseRefreshNode, chaseHasTargetNode, chaseUseNode);

                LinkTarget(signatureRefreshNode, targetVariable);
                LinkTarget(signatureHasTargetNode, targetVariable);
                LinkTarget(signatureUseNode, targetVariable);
                LinkTarget(downSelectNode, targetVariable);
                LinkTarget(downUseNode, targetVariable);
                LinkTarget(leapSelectNode, targetVariable);
                LinkTarget(leapUseNode, targetVariable);
                LinkTarget(slamRefreshNode, targetVariable);
                LinkTarget(slamHasTargetNode, targetVariable);
                LinkTarget(slamRangeNode, targetVariable);
                LinkTarget(slamUseNode, targetVariable);
                LinkTarget(mainRefreshNode, targetVariable);
                LinkTarget(mainHasTargetNode, targetVariable);
                LinkTarget(mainRangeNode, targetVariable);
                LinkTarget(mainUseNode, targetVariable);
                LinkTarget(fallbackRefreshNode, targetVariable);
                LinkTarget(fallbackHasTargetNode, targetVariable);
                LinkTarget(fallbackRangeNode, targetVariable);
                LinkTarget(fallbackUseNode, targetVariable);
                LinkTarget(chaseRefreshNode, targetVariable);
                LinkTarget(chaseHasTargetNode, targetVariable);
                LinkTarget(chaseUseNode, targetVariable);

                SetStartRepeatFlags(startNode, repeat: true, allowMultipleRepeatsPerTick: false);
                setAssetDirtyMethod.Invoke(graphAsset, new object[] { true });
                buildRuntimeGraphMethod.Invoke(graphAsset, new object[] { true });
                saveAssetMethod.Invoke(graphAsset, null);
                AssetDatabase.SaveAssets();
                AssetDatabase.Refresh();

                Debug.Log("[DrogBTRebuild] 드로그 Behavior Graph authoring 자산 재구성이 완료되었습니다.");
            }
            catch (Exception exception)
            {
                Debug.LogException(exception);
            }
        }

        private static object CreateNode(UnityEngine.Object graphAsset, MethodInfo createNodeMethod, MethodInfo getNodeInfoMethod, Type runtimeType, Vector2 position)
        {
            if (runtimeType == null)
                throw new InvalidOperationException("[DrogBTRebuild] 런타임 타입이 null입니다.");

            object nodeInfo = getNodeInfoMethod.Invoke(null, new object[] { runtimeType });
            if (nodeInfo == null)
                throw new InvalidOperationException($"[DrogBTRebuild] NodeInfo를 찾지 못했습니다: {runtimeType.FullName}");

            Type nodeInfoType = nodeInfo.GetType();
            FieldInfo modelTypeField = nodeInfoType.GetField("ModelType", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
            object serializableType = modelTypeField?.GetValue(nodeInfo);
            PropertyInfo serializableTypeValueProperty = serializableType?.GetType().GetProperty("Type", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
            Type modelType = serializableTypeValueProperty?.GetValue(serializableType) as Type;
            if (modelType == null)
                throw new InvalidOperationException($"[DrogBTRebuild] ModelType을 찾지 못했습니다: {runtimeType.FullName}");

            return createNodeMethod.Invoke(graphAsset, new object[] { modelType, position, null, new object[] { nodeInfo } });
        }

        private static void ConnectChildren(UnityEngine.Object graphAsset, MethodInfo connectEdgeMethod, object parentNode, params object[] children)
        {
            object outputPort = GetDefaultOutputPort(parentNode);
            for (int i = 0; i < children.Length; i++)
            {
                Connect(graphAsset, connectEdgeMethod, outputPort, GetDefaultInputPort(children[i]));
            }
        }

        private static void Connect(UnityEngine.Object graphAsset, MethodInfo connectEdgeMethod, object outputPort, object inputPort)
        {
            if (outputPort == null || inputPort == null)
                throw new InvalidOperationException("[DrogBTRebuild] 포트 연결 대상이 null입니다.");

            connectEdgeMethod.Invoke(graphAsset, new[] { outputPort, inputPort });
        }

        private static object GetDefaultInputPort(object node)
        {
            return GetDefaultPort(node, "TryDefaultInputPortModel");
        }

        private static object GetDefaultOutputPort(object node)
        {
            return GetDefaultPort(node, "TryDefaultOutputPortModel");
        }

        private static object GetDefaultPort(object node, string methodName)
        {
            MethodInfo method = node.GetType().GetMethod(methodName, BindingFlags.Instance | BindingFlags.Public);
            object[] parameters = { null };
            bool success = method != null && (bool)method.Invoke(node, parameters);
            return success ? parameters[0] : null;
        }

        private static object FindBlackboardVariableModel(string variableName)
        {
            UnityEngine.Object blackboardAsset = AssetDatabase.LoadAllAssetsAtPath(GraphAssetPath)
                .FirstOrDefault(asset => asset != null && asset.GetType().Name.Contains("BehaviorBlackboardAuthoringAsset", StringComparison.Ordinal));

            if (blackboardAsset == null)
                return null;

            PropertyInfo variablesProperty = blackboardAsset.GetType().GetProperty("Variables", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
            FieldInfo variablesField = blackboardAsset.GetType().GetField("m_Variables", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
            IEnumerable variables = variablesProperty?.GetValue(blackboardAsset) as IEnumerable ?? variablesField?.GetValue(blackboardAsset) as IEnumerable;
            if (variables == null)
                return null;

            foreach (object variable in variables)
            {
                if (variable == null)
                    continue;

                PropertyInfo nameProperty = variable.GetType().GetProperty("Name", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
                FieldInfo nameField = variable.GetType().GetField("Name", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
                string name = nameProperty?.GetValue(variable) as string ?? nameField?.GetValue(variable) as string;
                if (name == variableName)
                    return variable;
            }

            return null;
        }

        private static void LinkTarget(object node, object targetVariable)
        {
            LinkFieldToVariable(node, "Target", typeof(GameObject), targetVariable);
        }

        private static void LinkFieldToVariable(object node, string fieldName, Type fieldType, object variableModel)
        {
            MethodInfo getVariableLinkMethod = node.GetType().GetMethod("GetVariableLink", BindingFlags.Instance | BindingFlags.Public);
            object variableLink = getVariableLinkMethod?.Invoke(node, new object[] { fieldName, fieldType });
            if (variableLink != null)
            {
                PropertyInfo blackboardVariableProperty = variableLink.GetType().GetProperty("BlackboardVariable", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
                blackboardVariableProperty?.SetValue(variableLink, variableModel);
            }

            object fieldModel = FindFieldModel(node, fieldName);
            if (fieldModel == null)
                return;

            PropertyInfo linkedVariableProperty = fieldModel.GetType().GetProperty("LinkedVariable", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
            FieldInfo linkedVariableField = fieldModel.GetType().GetField("LinkedVariable", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);

            if (linkedVariableProperty != null && linkedVariableProperty.CanWrite)
            {
                linkedVariableProperty.SetValue(fieldModel, variableModel);
            }
            else
            {
                linkedVariableField?.SetValue(fieldModel, variableModel);
            }
        }

        private static object FindFieldModel(object node, string fieldName)
        {
            FieldInfo fieldValuesField = node.GetType().GetField("m_FieldValues", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
            PropertyInfo fieldValuesProperty = node.GetType().GetProperty("FieldValues", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);

            IEnumerable fieldValues = fieldValuesField?.GetValue(node) as IEnumerable ?? fieldValuesProperty?.GetValue(node) as IEnumerable;
            if (fieldValues == null)
                return null;

            foreach (object fieldModel in fieldValues)
            {
                if (fieldModel == null)
                    continue;

                PropertyInfo fieldNameProperty = fieldModel.GetType().GetProperty("FieldName", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
                FieldInfo fieldNameField = fieldModel.GetType().GetField("FieldName", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
                string currentFieldName = fieldNameProperty?.GetValue(fieldModel) as string ?? fieldNameField?.GetValue(fieldModel) as string;
                if (currentFieldName == fieldName)
                    return fieldModel;
            }

            return null;
        }

        private static void SetStartRepeatFlags(object startNode, bool repeat, bool allowMultipleRepeatsPerTick)
        {
            Type startNodeType = startNode.GetType();
            FieldInfo repeatField = startNodeType.GetField("Repeat", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
            FieldInfo allowField = startNodeType.GetField("AllowMultipleRepeatsPerTick", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);

            repeatField?.SetValue(startNode, repeat);
            allowField?.SetValue(startNode, allowMultipleRepeatsPerTick);
        }
    }
}