TheInfinityIQ_GCP/src/gcp-backend/GCP.Api/Areas/Identity/Pages/Account/Manage/GenerateRecoveryCodes.cshtml.cs
#nullable disable

using GCP.Api.Data.Entities;

using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;

namespace GCP.Api.Areas.Identity.Pages.Account.Manage
{
	public class GenerateRecoveryCodesModel : PageModel
	{
		private readonly UserManager<User> _userManager;
		private readonly ILogger<GenerateRecoveryCodesModel> _logger;

		public GenerateRecoveryCodesModel(
			UserManager<User> userManager,
			ILogger<GenerateRecoveryCodesModel> logger)
		{
			_userManager = userManager;
			_logger = logger;
		}

		[TempData]
		public string[] RecoveryCodes { get; set; }

		[TempData]
		public string StatusMessage { get; set; }

		public async Task<IActionResult> OnGetAsync()
		{
			var user = await _userManager.GetUserAsync(User);
			if (user is null)
			{
				return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
			}

			var isTwoFactorEnabled = await _userManager.GetTwoFactorEnabledAsync(user);
			if (!isTwoFactorEnabled)
			{
				throw new InvalidOperationException($"Cannot generate recovery codes for user because they do not have 2FA enabled.");
			}

			return Page();
		}

		public async Task<IActionResult> OnPostAsync()
		{
			var user = await _userManager.GetUserAsync(User);
			if (user is null)
			{
				return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
			}

			var isTwoFactorEnabled = await _userManager.GetTwoFactorEnabledAsync(user);
			var userId = await _userManager.GetUserIdAsync(user);
			if (!isTwoFactorEnabled)
			{
				throw new InvalidOperationException($"Cannot generate recovery codes for user as they do not have 2FA enabled.");
			}

			var recoveryCodes = await _userManager.GenerateNewTwoFactorRecoveryCodesAsync(user, 10);
			RecoveryCodes = recoveryCodes.ToArray();

			_logger.LogInformation("User with ID '{UserId}' has generated new 2FA recovery codes.", userId);
			StatusMessage = "You have generated new recovery codes.";
			return RedirectToPage("./ShowRecoveryCodes");
		}
	}
}
