/*************************************************************************
 * ModernUO                                                              *
 * Copyright 2019-2026 - ModernUO Development Team                       *
 * Email: hi@modernuo.com                                                *
 * File: ExportSpawnersCommand.cs                                        *
 *                                                                       *
 * This program is free software: you can redistribute it and/or modify  *
 * it under the terms of the GNU General Public License as published by  *
 * the Free Software Foundation, either version 3 of the License, or     *
 * (at your option) any later version.                                   *
 *                                                                       *
 * You should have received a copy of the GNU General Public License     *
 * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 *************************************************************************/

using System;
using System.Collections.Generic;
using System.IO;
using Server.Commands.Generic;
using Server.Network;

namespace Server.Engines.Spawners;

public class ExportSpawnersCommand : BaseCommand
{
    public static void Configure()
    {
        TargetCommands.Register(new ExportSpawnersCommand());
    }

    public ExportSpawnersCommand()
    {
        AccessLevel = AccessLevel.GameMaster;
        Supports = CommandSupport.AllItems & ~CommandSupport.Contained;
        Commands = ["ExportSpawners"];
        ObjectTypes = ObjectTypes.Items;
        Usage = "ExportSpawners";
        Description = "Exports the given spawners to a file";
        ListOptimized = true;
    }

    public override void ExecuteList(CommandEventArgs e, List<object> list)
    {
        var path = e.Arguments.Length == 0 ? string.Empty : e.Arguments[0].Trim();
        var condition = e.Arguments.Length == 2 ? e.Arguments[1].Trim() : string.Empty;

        if (string.IsNullOrEmpty(path))
        {
            path = Path.Combine(Core.BaseDirectory, $"Data/Spawns/{Utility.GetTimeStamp()}.json");
        }
        else
        {
            var directory = Path.GetDirectoryName(Path.GetFullPath(path!))!;
            if (!Path.IsPathRooted(path))
            {
                path = Path.Combine(Core.BaseDirectory, path);
                PathUtility.EnsureDirectory(directory);
            }
            else if (!Directory.Exists(directory))
            {
                LogFailure("Directory doesn't exist.");
                return;
            }
        }

        NetState.FlushAll();

        var spawnRecords = new List<SpawnerDto>(list.Count);
        for (var i = 0; i < list.Count; i++)
        {
            // Not a spawner, not on a valid map, or is in a container
            if (list[i] is not BaseSpawner spawner || spawner.Map == Map.Internal || spawner.Parent != null)
            {
                continue;
            }

            if (!string.IsNullOrEmpty(spawner.Name) && !spawner.Name.StartsWith(
                    condition,
                    StringComparison.OrdinalIgnoreCase
                ))
            {
                continue;
            }

            spawnRecords.Add(spawner.ToDto());
        }

        if (spawnRecords.Count == 0)
        {
            LogFailure("No matching spawners found.");
            return;
        }

        e.Mobile.SendMessage("Exporting spawners...");

        // Compact layout (UTF-8, no BOM, LF) keeps re-exports diff-friendly.
        PathUtility.EnsureDirectory(Path.GetDirectoryName(path));
        File.WriteAllText(path, SpawnerJsonSerializer.SerializeCompact(spawnRecords));

        e.Mobile.SendMessage($"Spawners exported to {path}");
    }
}