using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.IO;
using Process = System.Diagnostics.Process;

using UnityEditor;
using UnityEngine;

namespace Colosseum.Editor
{
    /// <summary>
    /// Multiplayer Play Mode 관련 상태와 리플렉션 정보를 점검하는 디버그 메뉴입니다.
    /// </summary>
    public static class MultiplayerPlayModeDebugMenu
    {
        private const string MultiplayerManagerAssetPath = "ProjectSettings/MultiplayerManager.asset";
        private const string DiagnosticsDirectory = "Temp/MPP";
        private const string VirtualProjectsRoot = "Library/VP";

        [MenuItem("Tools/Colosseum/Multiplayer/Log Play Mode Module Types")]
        private static void LogPlayModeModuleTypes()
        {
            Assembly playModeAssembly = typeof(UnityEditor.PlayModeStateChange).Assembly;
            Type[] types = playModeAssembly
                .GetTypes()
                .Where(type => type.FullName != null &&
                               (type.FullName.Contains("PlayMode", StringComparison.OrdinalIgnoreCase) ||
                                type.FullName.Contains("Scenario", StringComparison.OrdinalIgnoreCase) ||
                                type.FullName.Contains("Multiplayer", StringComparison.OrdinalIgnoreCase)))
                .OrderBy(type => type.FullName)
                .ToArray();

            StringBuilder builder = new StringBuilder();
            builder.AppendLine("[MPP] PlayModeModule 타입 목록");
            for (int i = 0; i < types.Length; i++)
            {
                builder.Append("- ");
                builder.AppendLine(types[i].FullName);
            }

            string diagnosticsPath = EnsureDiagnosticsFilePath("PlayModeModuleTypes.txt");
            File.WriteAllText(diagnosticsPath, builder.ToString(), Encoding.UTF8);
            Debug.Log($"[MPP] PlayModeModule 타입 목록을 저장했습니다. {diagnosticsPath}");
        }

        [MenuItem("Tools/Colosseum/Multiplayer/Log Play Mode User Settings")]
        private static void LogPlayModeUserSettings()
        {
            Type settingsType = Type.GetType("Unity.PlayMode.Editor.PlayModeUserSettings, UnityEditor.PlayModeModule");
            if (settingsType == null)
            {
                Debug.LogWarning("[MPP] Unity.PlayMode.Editor.PlayModeUserSettings 타입을 찾지 못했습니다.");
                return;
            }

            string diagnosticsPath = EnsureDiagnosticsFilePath("PlayModeUserSettings.txt");
            MethodInfo getOrCreateMethod = settingsType.GetMethod(
                "GetOrCreateSettings",
                BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);

            object settings = getOrCreateMethod?.Invoke(null, null);
            if (settings == null)
            {
                StringBuilder nullBuilder = new StringBuilder();
                nullBuilder.AppendLine("[MPP] PlayModeUserSettings 인스턴스를 가져오지 못했습니다.");
                nullBuilder.AppendLine($"Type: {settingsType.FullName}");
                nullBuilder.AppendLine("Static Members:");
                AppendStaticMembers(nullBuilder, settingsType);
                File.WriteAllText(diagnosticsPath, nullBuilder.ToString(), Encoding.UTF8);
                Debug.LogWarning($"[MPP] PlayModeUserSettings 인스턴스를 가져오지 못했습니다. 진단 파일: {diagnosticsPath}");
                return;
            }

            StringBuilder builder = new StringBuilder();
            builder.AppendLine("[MPP] PlayModeUserSettings");
            AppendMembers(builder, settingsType, settings);
            AppendStaticMembers(builder, settingsType);
            File.WriteAllText(diagnosticsPath, builder.ToString(), Encoding.UTF8);
            Debug.Log($"[MPP] PlayModeUserSettings 정보를 저장했습니다. {diagnosticsPath}");
        }

        [MenuItem("Tools/Colosseum/Multiplayer/Enable Local Deployment")]
        private static void EnableLocalDeployment()
        {
            SerializedObject multiplayerManager = GetMultiplayerManagerSerializedObject();
            if (multiplayerManager == null)
            {
                return;
            }

            SerializedProperty localDeployment = multiplayerManager.FindProperty("m_EnablePlayModeLocalDeployment");
            if (localDeployment == null)
            {
                Debug.LogWarning("[MPP] m_EnablePlayModeLocalDeployment 속성을 찾지 못했습니다.");
                return;
            }

            localDeployment.intValue = 1;
            multiplayerManager.ApplyModifiedPropertiesWithoutUndo();
            AssetDatabase.SaveAssets();

            Debug.Log("[MPP] 로컬 Play Mode 배포를 활성화했습니다.");
        }

        [MenuItem("Tools/Colosseum/Multiplayer/Disable Local Deployment")]
        private static void DisableLocalDeployment()
        {
            SerializedObject multiplayerManager = GetMultiplayerManagerSerializedObject();
            if (multiplayerManager == null)
            {
                return;
            }

            SerializedProperty localDeployment = multiplayerManager.FindProperty("m_EnablePlayModeLocalDeployment");
            if (localDeployment == null)
            {
                Debug.LogWarning("[MPP] m_EnablePlayModeLocalDeployment 속성을 찾지 못했습니다.");
                return;
            }

            localDeployment.intValue = 0;
            multiplayerManager.ApplyModifiedPropertiesWithoutUndo();
            AssetDatabase.SaveAssets();

            Debug.Log("[MPP] 로컬 Play Mode 배포를 비활성화했습니다.");
        }

        [MenuItem("Tools/Colosseum/Multiplayer/Log Multiplayer Manager Settings")]
        private static void LogMultiplayerManagerSettings()
        {
            SerializedObject multiplayerManager = GetMultiplayerManagerSerializedObject();
            if (multiplayerManager == null)
            {
                return;
            }

            SerializedProperty roles = multiplayerManager.FindProperty("m_EnableMultiplayerRoles");
            SerializedProperty localDeployment = multiplayerManager.FindProperty("m_EnablePlayModeLocalDeployment");
            SerializedProperty remoteDeployment = multiplayerManager.FindProperty("m_EnablePlayModeRemoteDeployment");

            Debug.Log(
                $"[MPP] MultiplayerManager | Roles={roles?.intValue ?? -1} | " +
                $"LocalDeployment={localDeployment?.intValue ?? -1} | " +
                $"RemoteDeployment={remoteDeployment?.intValue ?? -1}");
        }

        [MenuItem("Tools/Colosseum/Multiplayer/Log Virtual Player Clones")]
        private static void LogVirtualPlayerClones()
        {
            string[] cloneDirectories = GetVirtualPlayerCloneDirectories();
            if (cloneDirectories.Length == 0)
            {
                Debug.LogWarning("[MPP] Library/VP 아래에 가상 플레이어 복제본을 찾지 못했습니다.");
                return;
            }

            StringBuilder builder = new StringBuilder();
            builder.AppendLine("[MPP] 가상 플레이어 복제본 목록");
            for (int i = 0; i < cloneDirectories.Length; i++)
            {
                builder.Append("- ");
                builder.AppendLine(Path.GetFullPath(cloneDirectories[i]));
            }

            Debug.Log(builder.ToString());
        }

        [MenuItem("Tools/Colosseum/Multiplayer/Launch First Virtual Player Clone")]
        private static void LaunchFirstVirtualPlayerClone()
        {
            string[] cloneDirectories = GetVirtualPlayerCloneDirectories();
            if (cloneDirectories.Length == 0)
            {
                Debug.LogWarning("[MPP] 실행할 가상 플레이어 복제본이 없습니다.");
                return;
            }

            string cloneProjectPath = Path.GetFullPath(cloneDirectories[0]);
            Process.Start(new System.Diagnostics.ProcessStartInfo
            {
                FileName = EditorApplication.applicationPath,
                Arguments = $"-projectPath \"{cloneProjectPath}\"",
                UseShellExecute = true,
            });

            Debug.Log($"[MPP] 가상 플레이어 복제본을 실행했습니다. {cloneProjectPath}");
        }

        private static SerializedObject GetMultiplayerManagerSerializedObject()
        {
            UnityEngine.Object[] assets = AssetDatabase.LoadAllAssetsAtPath(MultiplayerManagerAssetPath);
            if (assets == null || assets.Length == 0 || assets[0] == null)
            {
                Debug.LogWarning("[MPP] MultiplayerManager.asset를 찾지 못했습니다.");
                return null;
            }

            return new SerializedObject(assets[0]);
        }

        private static void AppendMembers(StringBuilder builder, Type settingsType, object settings)
        {
            const BindingFlags flags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;

            List<PropertyInfo> properties = settingsType.GetProperties(flags)
                .Where(property => property.GetIndexParameters().Length == 0)
                .OrderBy(property => property.Name)
                .ToList();

            for (int i = 0; i < properties.Count; i++)
            {
                PropertyInfo property = properties[i];
                object value = null;
                bool success = true;

                try
                {
                    value = property.GetValue(settings);
                }
                catch (Exception exception)
                {
                    success = false;
                    value = exception.GetType().Name;
                }

                builder.Append("- Property ");
                builder.Append(property.Name);
                builder.Append(" = ");
                builder.AppendLine(success ? FormatValue(value) : $"<error: {value}>");
            }

            List<FieldInfo> fields = settingsType.GetFields(flags)
                .OrderBy(field => field.Name)
                .ToList();

            for (int i = 0; i < fields.Count; i++)
            {
                FieldInfo field = fields[i];
                object value = field.GetValue(settings);
                builder.Append("- Field ");
                builder.Append(field.Name);
                builder.Append(" = ");
                builder.AppendLine(FormatValue(value));
            }
        }

        private static void AppendStaticMembers(StringBuilder builder, Type settingsType)
        {
            const BindingFlags flags = BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic;

            List<PropertyInfo> properties = settingsType.GetProperties(flags)
                .Where(property => property.GetIndexParameters().Length == 0)
                .OrderBy(property => property.Name)
                .ToList();

            for (int i = 0; i < properties.Count; i++)
            {
                PropertyInfo property = properties[i];
                object value = null;
                bool success = true;

                try
                {
                    value = property.GetValue(null);
                }
                catch (Exception exception)
                {
                    success = false;
                    value = exception.GetType().Name;
                }

                builder.Append("- Static Property ");
                builder.Append(property.Name);
                builder.Append(" = ");
                builder.AppendLine(success ? FormatValue(value) : $"<error: {value}>");
            }

            List<FieldInfo> fields = settingsType.GetFields(flags)
                .OrderBy(field => field.Name)
                .ToList();

            for (int i = 0; i < fields.Count; i++)
            {
                FieldInfo field = fields[i];
                object value = field.GetValue(null);
                builder.Append("- Static Field ");
                builder.Append(field.Name);
                builder.Append(" = ");
                builder.AppendLine(FormatValue(value));
            }

            List<MethodInfo> methods = settingsType.GetMethods(flags)
                .Where(method => !method.IsSpecialName)
                .OrderBy(method => method.Name)
                .ToList();

            for (int i = 0; i < methods.Count; i++)
            {
                MethodInfo method = methods[i];
                string parameterSummary = string.Join(
                    ", ",
                    method.GetParameters().Select(parameter => $"{parameter.ParameterType.Name} {parameter.Name}"));

                builder.Append("- Static Method ");
                builder.Append(method.ReturnType.Name);
                builder.Append(' ');
                builder.Append(method.Name);
                builder.Append('(');
                builder.Append(parameterSummary);
                builder.AppendLine(")");
            }
        }

        private static string EnsureDiagnosticsFilePath(string fileName)
        {
            Directory.CreateDirectory(DiagnosticsDirectory);
            return Path.Combine(DiagnosticsDirectory, fileName);
        }

        private static string[] GetVirtualPlayerCloneDirectories()
        {
            if (!Directory.Exists(VirtualProjectsRoot))
            {
                return Array.Empty<string>();
            }

            return Directory
                .GetDirectories(VirtualProjectsRoot, "mppm*")
                .OrderBy(path => path)
                .ToArray();
        }

        private static string FormatValue(object value)
        {
            if (value == null)
            {
                return "null";
            }

            if (value is string stringValue)
            {
                return stringValue;
            }

            if (value is IEnumerable<object> enumerable)
            {
                return "[" + string.Join(", ", enumerable.Select(FormatValue)) + "]";
            }

            return value.ToString();
        }
    }
}