// ----------------------------------------------------------------------------------------------
//     _                _      _  ____   _                           _____
//    / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
//   / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
//  / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
// /_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
// ----------------------------------------------------------------------------------------------
// |
// Copyright 2015-2024 Łukasz "JustArchi" Domeradzki
// Contact: JustArchi@JustArchi.net
// |
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// |
// http://www.apache.org/licenses/LICENSE-2.0
// |
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Threading.Tasks;
using ArchiSteamFarm.Core;
using ArchiSteamFarm.Localization;
using ArchiSteamFarm.Steam;
using ArchiSteamFarm.Steam.Storage;
using SteamKit2;

namespace ArchiSteamFarm.OfficialPlugins.ItemsMatcher;

internal static class Commands {
	internal static async Task<string?> OnBotCommand(Bot bot, EAccess access, string[] args, ulong steamID = 0) {
		ArgumentNullException.ThrowIfNull(bot);

		if (!Enum.IsDefined(access)) {
			throw new InvalidEnumArgumentException(nameof(access), (int) access, typeof(EAccess));
		}

		if ((args == null) || (args.Length == 0)) {
			throw new ArgumentNullException(nameof(args));
		}

		if ((steamID != 0) && !new SteamID(steamID).IsIndividualAccount) {
			throw new ArgumentOutOfRangeException(nameof(steamID));
		}

		switch (args.Length) {
			case 1:
				switch (args[0].ToUpperInvariant()) {
					case "MATCH":
						return ResponseMatch(access, bot);
				}

				break;
			default:
				switch (args[0].ToUpperInvariant()) {
					case "MATCH":
						return await ResponseMatch(access, Utilities.GetArgsAsText(args, 1, ","), steamID).ConfigureAwait(false);
				}

				break;
		}

		return null;
	}

	private static string? ResponseMatch(EAccess access, Bot bot) {
		if (!Enum.IsDefined(access)) {
			throw new InvalidEnumArgumentException(nameof(access), (int) access, typeof(EAccess));
		}

		ArgumentNullException.ThrowIfNull(bot);

		if (access < EAccess.Master) {
			return access > EAccess.None ? bot.Commands.FormatBotResponse(Strings.ErrorAccessDenied) : null;
		}

		if (!bot.IsConnectedAndLoggedOn) {
			return bot.Commands.FormatBotResponse(Strings.BotNotConnected);
		}

		if (bot.BotConfig.TradingPreferences.HasFlag(BotConfig.ETradingPreferences.MatchEverything)) {
			return bot.Commands.FormatBotResponse(Strings.FormatWarningFailedWithError(nameof(BotConfig.ETradingPreferences.MatchEverything)));
		}

		if ((ASF.GlobalConfig?.LicenseID == null) || (ASF.GlobalConfig.LicenseID == Guid.Empty)) {
			return bot.Commands.FormatBotResponse(Strings.FormatWarningFailedWithError(nameof(ASF.GlobalConfig.LicenseID)));
		}

		if (!ItemsMatcherPlugin.RemoteCommunications.TryGetValue(bot, out RemoteCommunication? remoteCommunication)) {
			return bot.Commands.FormatBotResponse(Strings.FormatWarningFailedWithError(nameof(remoteCommunication)));
		}

		remoteCommunication.TriggerMatchActivelyEarlier();

		return bot.Commands.FormatBotResponse(Strings.Done);
	}

	private static async Task<string?> ResponseMatch(EAccess access, string botNames, ulong steamID = 0) {
		if (!Enum.IsDefined(access)) {
			throw new InvalidEnumArgumentException(nameof(access), (int) access, typeof(EAccess));
		}

		ArgumentException.ThrowIfNullOrEmpty(botNames);

		if ((steamID != 0) && !new SteamID(steamID).IsIndividualAccount) {
			throw new ArgumentOutOfRangeException(nameof(steamID));
		}

		HashSet<Bot>? bots = Bot.GetBots(botNames);

		if ((bots == null) || (bots.Count == 0)) {
			return access >= EAccess.Owner ? Steam.Interaction.Commands.FormatStaticResponse(Strings.FormatBotNotFound(botNames)) : null;
		}

		IList<string?> results = await Utilities.InParallel(bots.Select(bot => Task.Run(() => ResponseMatch(Steam.Interaction.Commands.GetProxyAccess(bot, access, steamID), bot)))).ConfigureAwait(false);

		List<string> responses = [..results.Where(static result => !string.IsNullOrEmpty(result))!];

		return responses.Count > 0 ? string.Join(Environment.NewLine, responses) : null;
	}
}