using System;
using System.Globalization;
using System.Linq;
using System.Net;
using System.Threading.Tasks;
using ArchiSteamFarm.Core;
using ArchiSteamFarm.IPC.Requests;
using ArchiSteamFarm.IPC.Responses;
using ArchiSteamFarm.Localization;
using ArchiSteamFarm.Steam;
using ArchiSteamFarm.Storage;
using Microsoft.AspNetCore.Mvc;

namespace ArchiSteamFarm.IPC.Controllers.Api;

[Route("Api/Command")]
public sealed class CommandController : ArchiController {
	/// <summary>
	///     Executes a command.
	/// </summary>
	/// <remarks>
	///     This API endpoint is supposed to be entirely replaced by ASF actions available under /Api/ASF/{action} and /Api/Bot/{bot}/{action}.
	///     You should use "given bot" commands when executing this endpoint, omitting targets of the command will cause the command to be executed on first defined bot
	/// </remarks>
	[Consumes("application/json")]
	[HttpPost]
	[ProducesResponseType(typeof(GenericResponse<string>), (int) HttpStatusCode.OK)]
	[ProducesResponseType(typeof(GenericResponse), (int) HttpStatusCode.BadRequest)]
	public async Task<ActionResult<GenericResponse>> CommandPost([FromBody] CommandRequest request) {
		if (request == null) {
			throw new ArgumentNullException(nameof(request));
		}

		if (string.IsNullOrEmpty(request.Command)) {
			return BadRequest(new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.ErrorIsEmpty, nameof(request.Command))));
		}

		ulong steamOwnerID = ASF.GlobalConfig?.SteamOwnerID ?? GlobalConfig.DefaultSteamOwnerID;

		if (steamOwnerID == 0) {
			return BadRequest(new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.ErrorIsInvalid, nameof(ASF.GlobalConfig.SteamOwnerID))));
		}

		Bot? targetBot = Bot.Bots?.OrderBy(static bot => bot.Key, Bot.BotsComparer).Select(static bot => bot.Value).FirstOrDefault();

		if (targetBot == null) {
			return BadRequest(new GenericResponse(false, Strings.ErrorNoBotsDefined));
		}

		string command = request.Command;
		string? commandPrefix = ASF.GlobalConfig != null ? ASF.GlobalConfig.CommandPrefix : GlobalConfig.DefaultCommandPrefix;

		// ReSharper disable once RedundantSuppressNullableWarningExpression - required for .NET Framework
		if (!string.IsNullOrEmpty(commandPrefix) && command.StartsWith(commandPrefix!, StringComparison.Ordinal)) {
			// ReSharper disable once RedundantSuppressNullableWarningExpression - required for .NET Framework
			if (command.Length == commandPrefix!.Length) {
				// If the message starts with command prefix and is of the same length as command prefix, then it's just empty command trigger, useless
				return BadRequest(new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.ErrorIsEmpty, nameof(command))));
			}

			command = command[commandPrefix.Length..];
		}

		string? response = await targetBot.Commands.Response(steamOwnerID, command).ConfigureAwait(false);

		return Ok(new GenericResponse<string>(response));
	}
}
