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

namespace Topon_Adapter.Editor
{
    [Serializable]
    public sealed class ToponBuildSettings
    {
        public bool enableDebuggerUI = false;
        public bool forceVerbtoUtilVersion = true;
        public bool stripResolvedDebuggerArtifacts = true;
    }

    internal static class ToponBuildSettingsStore
    {
        private const string ActiveBuildSessionKey = "Commercialization.Topon.ActiveBuildSettings";
        private const string SettingsFileSuffix = "_topon_build_settings.json";
        private const string BuildConfigsFolder = "BuildConfigs";
        private const string DebuggerPackageMarker = "com.anythink.sdk:debugger-ui";
        private const string VerbtoPackageMarker = "com.verbto.tools:util";
        private const string DebuggerRepositoryMarker = "jfrog.anythinktech.com/artifactory/debugger";

        [Serializable]
        private sealed class ActiveBuildSettings
        {
            public ToponBuildSettings settings;
            public long utcTicks;
        }

        public static ToponBuildSettings CreateDefault()
        {
            return new ToponBuildSettings();
        }

        public static ToponBuildSettings LoadForProfileName(string profileName, string repositoryRoot)
        {
            var settings = CreateDefault();
            var path = GetSettingsPath(profileName, repositoryRoot);
            if (string.IsNullOrEmpty(path) || !File.Exists(path))
            {
                return settings;
            }

            try
            {
                JsonUtility.FromJsonOverwrite(File.ReadAllText(path), settings);
            }
            catch (Exception exception)
            {
                Debug.LogWarning($"[TopOn Build] Failed to read build settings: {exception.Message}");
            }

            return settings;
        }

        public static void SaveForProfileName(string profileName, string repositoryRoot, ToponBuildSettings settings)
        {
            if (settings == null)
            {
                settings = CreateDefault();
            }

            var path = GetSettingsPath(profileName, repositoryRoot);
            if (string.IsNullOrEmpty(path))
            {
                return;
            }

            try
            {
                var directory = Path.GetDirectoryName(path);
                if (!string.IsNullOrEmpty(directory) && !Directory.Exists(directory))
                {
                    Directory.CreateDirectory(directory);
                }

                File.WriteAllText(path, JsonUtility.ToJson(settings, true));
            }
            catch (Exception exception)
            {
                Debug.LogWarning($"[TopOn Build] Failed to save build settings: {exception.Message}");
            }
        }

        public static void SetActiveForCurrentBuild(ToponBuildSettings settings)
        {
            var activeSettings = new ActiveBuildSettings
            {
                settings = Clone(settings),
                utcTicks = DateTime.UtcNow.Ticks
            };

            SessionState.SetString(ActiveBuildSessionKey, JsonUtility.ToJson(activeSettings));
        }

        public static ToponBuildSettings GetActiveForCurrentBuild()
        {
            var json = SessionState.GetString(ActiveBuildSessionKey, string.Empty);
            if (string.IsNullOrWhiteSpace(json))
            {
                return CreateDefault();
            }

            try
            {
                var activeSettings = JsonUtility.FromJson<ActiveBuildSettings>(json);
                if (activeSettings == null || activeSettings.settings == null)
                {
                    return CreateDefault();
                }

                var activatedAt = new DateTime(activeSettings.utcTicks, DateTimeKind.Utc);
                if (DateTime.UtcNow - activatedAt > TimeSpan.FromHours(6))
                {
                    ClearActiveBuildSettings();
                    return CreateDefault();
                }

                return Clone(activeSettings.settings);
            }
            catch (Exception exception)
            {
                Debug.LogWarning($"[TopOn Build] Failed to read active build settings: {exception.Message}");
                return CreateDefault();
            }
        }

        public static void ClearActiveBuildSettings()
        {
            SessionState.EraseString(ActiveBuildSessionKey);
        }

        public static bool HasStaleDebuggerResolverOutput(string repositoryRoot)
        {
            foreach (var path in GetResolverOutputPaths(repositoryRoot))
            {
                if (!File.Exists(path))
                {
                    continue;
                }

                var content = File.ReadAllText(path);
                if (content.Contains(DebuggerPackageMarker) ||
                    content.Contains(VerbtoPackageMarker) ||
                    content.Contains(DebuggerRepositoryMarker))
                {
                    return true;
                }
            }

            return false;
        }

        public static IReadOnlyList<string> FindResolvedDebuggerArtifacts(string repositoryRoot)
        {
            var result = new List<string>();
            var root = ResolveRepositoryRoot(repositoryRoot);
            if (string.IsNullOrEmpty(root))
            {
                return result;
            }

            var androidPluginPath = Path.Combine(root, "Assets", "Plugins", "Android");
            if (!Directory.Exists(androidPluginPath))
            {
                return result;
            }

            foreach (var path in Directory.GetFiles(androidPluginPath, "*", SearchOption.AllDirectories))
            {
                if (IsDebuggerArtifactFileName(Path.GetFileName(path)))
                {
                    result.Add(path);
                }
            }

            return result;
        }

        internal static bool IsDebuggerArtifactFileName(string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
            {
                return false;
            }

            return fileName.StartsWith("com.anythink.sdk.debugger-ui-", StringComparison.OrdinalIgnoreCase) ||
                   fileName.StartsWith("com.verbto.tools.util-", StringComparison.OrdinalIgnoreCase);
        }

        private static ToponBuildSettings Clone(ToponBuildSettings settings)
        {
            if (settings == null)
            {
                return CreateDefault();
            }

            return new ToponBuildSettings
            {
                enableDebuggerUI = settings.enableDebuggerUI,
                forceVerbtoUtilVersion = settings.forceVerbtoUtilVersion,
                stripResolvedDebuggerArtifacts = settings.stripResolvedDebuggerArtifacts
            };
        }

        private static IEnumerable<string> GetResolverOutputPaths(string repositoryRoot)
        {
            var root = ResolveRepositoryRoot(repositoryRoot);
            if (string.IsNullOrEmpty(root))
            {
                yield break;
            }

            yield return Path.Combine(root, "ProjectSettings", "AndroidResolverDependencies.xml");
            yield return Path.Combine(root, "Assets", "Plugins", "Android", "mainTemplate.gradle");
            yield return Path.Combine(root, "Assets", "Plugins", "Android", "mainTemplate.gradle.backup");
            yield return Path.Combine(root, "Assets", "Plugins", "Android", "settingsTemplate.gradle");
        }

        private static string GetSettingsPath(string profileName, string repositoryRoot)
        {
            var root = ResolveRepositoryRoot(repositoryRoot);
            if (string.IsNullOrEmpty(root))
            {
                return string.Empty;
            }

            return Path.Combine(root, BuildConfigsFolder, $"{SanitizeProfileName(profileName)}{SettingsFileSuffix}");
        }

        private static string ResolveRepositoryRoot(string repositoryRoot)
        {
            if (!string.IsNullOrWhiteSpace(repositoryRoot))
            {
                return Path.GetFullPath(repositoryRoot);
            }

            var dataPath = Application.dataPath;
            var parent = Directory.GetParent(dataPath);
            return parent == null ? string.Empty : parent.FullName;
        }

        private static string SanitizeProfileName(string profileName)
        {
            if (string.IsNullOrWhiteSpace(profileName))
            {
                return "default";
            }

            var invalidChars = Path.GetInvalidFileNameChars();
            var chars = profileName.ToCharArray();
            for (var i = 0; i < chars.Length; i++)
            {
                if (Array.IndexOf(invalidChars, chars[i]) >= 0)
                {
                    chars[i] = '_';
                }
            }

            return new string(chars);
        }
    }
}