#if UNITY_EDITOR
using System;
using System.IO;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using UnityEditor;
using UnityEngine;
using Guildlib.Runtime;
using Newtonsoft.Json;

namespace Guildlib.Editor
{
    public class GuildlibSyncWindow : EditorWindow
    {
        GuildlibConfig config;
        string         log         = "";
        bool           busy        = false;
        Vector2        scroll;
        string         statusText  = "Not connected";
        bool           statusOk    = false;

        // Platform / tag filter toggles for pull operations
        bool   filterByPlatform = false;
        bool   filterByTag      = false;
        string platformFilter   = "";
        string tagFilter        = "";

        [MenuItem("Window/Guildlib/Sync Panel")]
        static void Open() => GetWindow<GuildlibSyncWindow>("Guildlib").Show();

        void OnEnable()
        {
            config = GuildlibConfig.Load();
            if (config == null)
                Log("No GuildlibConfig found. Create one via Assets > Create > Guildlib > Config.");
        }

        void OnGUI()
        {
            EditorGUILayout.Space(6);
            EditorGUILayout.LabelField("Guildlib Sync Panel", EditorStyles.boldLabel);
            EditorGUILayout.Space(4);

            config = (GuildlibConfig)EditorGUILayout.ObjectField("Config", config, typeof(GuildlibConfig), false);
            if (config == null)
            {
                EditorGUILayout.HelpBox("Assign a GuildlibConfig asset.", MessageType.Warning);
                return;
            }

            EditorGUILayout.LabelField("Server", config.serverUrl, EditorStyles.miniLabel);
            var style = statusOk ? EditorStyles.boldLabel : EditorStyles.miniLabel;
            EditorGUILayout.LabelField("Status", statusText, style);

            EditorGUILayout.Space(8);

            // ── Filters ──────────────────────────────────────────────────────
            EditorGUILayout.LabelField("Pull filters (optional)", EditorStyles.boldLabel);

            filterByPlatform = EditorGUILayout.Toggle("Filter by platform", filterByPlatform);
            if (filterByPlatform)
            {
                EditorGUI.indentLevel++;
                platformFilter = EditorGUILayout.TextField("Platforms (comma-separated)", platformFilter);
                EditorGUILayout.HelpBox(
                    "Example: pc,ps5\n" +
                    "Valid values: " + string.Join(", ", GuildPlatformRegistry.All),
                    MessageType.Info);
                EditorGUI.indentLevel--;
            }

            filterByTag = EditorGUILayout.Toggle("Filter by tag", filterByTag);
            if (filterByTag)
            {
                EditorGUI.indentLevel++;
                tagFilter = EditorGUILayout.TextField("Tags (comma-separated)", tagFilter);
                EditorGUILayout.HelpBox(
                    "Example: release,base_game\n" +
                    "Valid values: " + string.Join(", ", GuildTagRegistry.All),
                    MessageType.Info);
                EditorGUI.indentLevel--;
            }

            EditorGUILayout.Space(8);

            // ── Action buttons ────────────────────────────────────────────────
            EditorGUI.BeginDisabledGroup(busy);

            EditorGUILayout.BeginHorizontal();
            if (GUILayout.Button("Ping Server",      GUILayout.Height(28))) RunAsync(PingAsync);
            if (GUILayout.Button("Pull All Shards",  GUILayout.Height(28))) RunAsync(PullAllAsync);
            EditorGUILayout.EndHorizontal();

            EditorGUILayout.BeginHorizontal();
            if (GUILayout.Button("Export Schema",    GUILayout.Height(28))) RunAsync(ExportAsync);
            if (GUILayout.Button("Upload Schema",    GUILayout.Height(28))) RunAsync(UploadAsync);
            EditorGUILayout.EndHorizontal();

            EditorGUI.EndDisabledGroup();

            EditorGUILayout.Space(8);
            EditorGUILayout.LabelField("Log", EditorStyles.boldLabel);
            scroll = EditorGUILayout.BeginScrollView(scroll, GUILayout.Height(240));
            EditorGUILayout.TextArea(log, GUILayout.ExpandHeight(true));
            EditorGUILayout.EndScrollView();

            if (GUILayout.Button("Clear", GUILayout.Height(18))) log = "";
        }

        // ── Handlers ─────────────────────────────────────────────────────────

        async Task PingAsync()
        {
            Log("Pinging...");
            try
            {
                using var http = MakeHttp();
                var json       = await http.GetStringAsync($"{config.serverUrl}/health");
                var data       = JsonConvert.DeserializeObject<dynamic>(json);
                statusOk   = true;
                statusText = $"Online — shards: {string.Join(", ", ((Newtonsoft.Json.Linq.JArray)data.shards) ?? new Newtonsoft.Json.Linq.JArray())}";
                Log($"OK — {statusText}");
            }
            catch (Exception e) { statusOk = false; statusText = "Unreachable"; Log($"FAIL: {e.Message}"); }
        }

        async Task PullAllAsync()
        {
            var platforms = filterByPlatform && !string.IsNullOrWhiteSpace(platformFilter)
                ? new System.Collections.Generic.List<string>(platformFilter.Split(',', StringSplitOptions.RemoveEmptyEntries))
                : null;
            var tagList = filterByTag && !string.IsNullOrWhiteSpace(tagFilter)
                ? new System.Collections.Generic.List<string>(tagFilter.Split(',', StringSplitOptions.RemoveEmptyEntries))
                : null;

            if (platforms != null) Log($"Platform filter: {string.Join(", ", platforms)}");
            if (tagList   != null) Log($"Tag filter: {string.Join(", ", tagList)}");

            // Determine which shards to sync
            var targets = config.GetSyncTargets();
            if (targets == null)
            {
                // Ask server for all available shards
                using var http = MakeHttp();
                var json       = await http.GetStringAsync($"{config.serverUrl}/health");
                var data       = JsonConvert.DeserializeObject<dynamic>(json);
                var arr        = (Newtonsoft.Json.Linq.JArray)data.shards;
                targets        = arr?.ToObject<string[]>() ?? Array.Empty<string>();
            }

            Log($"Pulling {targets.Length} shard(s): {string.Join(", ", targets)}");
            int totalAdded = 0, totalUpdated = 0, totalSkipped = 0;

            foreach (var shard in targets)
            {
                try
                {
                    var client = new ShardClient(config, shard);
                    var result = await client.PullAsync(platforms, tagList);
                    totalAdded   += result.added;
                    totalUpdated += result.updated;
                    totalSkipped += result.skipped;
                    Log($"  {shard}: +{result.added} added  ~{result.updated} updated  {result.skipped} unchanged");
                }
                catch (Exception e) { Log($"  {shard}: FAIL — {e.Message}"); }
            }

            Log($"Done — added:{totalAdded}  updated:{totalUpdated}  skipped:{totalSkipped}");
            AssetDatabase.Refresh();
        }

        async Task ExportAsync()
        {
            Log("Exporting schema...");
            try
            {
                var json   = SchemaExporter.Export(config.projectId);
                var dir    = Path.Combine(Application.dataPath, "..", "GuildlibExports");
                Directory.CreateDirectory(dir);
                var path   = Path.Combine(dir, "schema.json");
                File.WriteAllText(path, json);
                Log($"Exported to: {path}");
            }
            catch (Exception e) { Log($"FAIL: {e.Message}"); }
            await Task.CompletedTask;
        }

        async Task UploadAsync()
        {
            Log("Uploading schema...");
            try
            {
                var json = SchemaExporter.Export(config.projectId);
                using var http = MakeHttp();
                var resp = await http.PostAsync(
                    $"{config.serverUrl}/schema",
                    new StringContent(json, Encoding.UTF8, "application/json"));
                resp.EnsureSuccessStatusCode();
                Log("Schema uploaded.");
            }
            catch (Exception e) { Log($"FAIL: {e.Message}"); }
        }

        // ── Helpers ───────────────────────────────────────────────────────────

        HttpClient MakeHttp()
        {
            var h = new HttpClient();
            if (!string.IsNullOrEmpty(config.apiKey))
                h.DefaultRequestHeaders.Add("X-Api-Key", config.apiKey);
            return h;
        }

        void Log(string msg)
        {
            log = $"[{DateTime.Now:HH:mm:ss}] {msg}\n{log}";
            Repaint();
        }

        void RunAsync(Func<Task> fn)
        {
            busy = true;
            fn().ContinueWith(_ =>
            {
                busy = false;
                EditorApplication.delayCall += Repaint;
            });
        }
    }
}
#endif