@inherits Microsoft.VisualStudio.Web.CodeGeneration.Templating.RazorTemplateBase
@using System.Collections.Generic
@using System.Linq
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;
@{
    var namespaceSet = new HashSet<string>(
        new string[]
        {
            "Microsoft.AspNetCore.Identity",
            "Microsoft.AspNetCore.Mvc",
            "Microsoft.AspNetCore.Mvc.RazorPages",
            "Microsoft.Extensions.Logging",
        });
    var thisNamespace = $"{Model.Namespace}.Areas.Identity.Pages.Account.Manage";
    if (!string.IsNullOrEmpty(Model.UserClassNamespace) && thisNamespace != Model.UserClassNamespace)
    {
        namespaceSet.Add(Model.UserClassNamespace);
    }
    foreach (var name in namespaceSet.OrderBy(n => n))
    {
@:using @name;
    }
}
namespace @thisNamespace
{
    public class ChangePasswordModel : PageModel
    {
        private readonly UserManager<@(Model.UserClass)> _userManager;
        private readonly SignInManager<@(Model.UserClass)> _signInManager;
        private readonly ILogger<ChangePasswordModel> _logger;

        public ChangePasswordModel(
            UserManager<@(Model.UserClass)> userManager,
            SignInManager<@(Model.UserClass)> signInManager,
            ILogger<ChangePasswordModel> logger)
        {
            _userManager = userManager;
            _signInManager = signInManager;
            _logger = logger;
        }

        [BindProperty]
        public InputModel Input { get; set; }

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

        public class InputModel
        {
            [Required]
            [DataType(DataType.Password)]
            [Display(Name = "Current password")]
            public string OldPassword { get; set; }

            [Required]
            [StringLength(100, ErrorMessage = "The {0} must be at least {2} and at max {1} characters long.", MinimumLength = 6)]
            [DataType(DataType.Password)]
            [Display(Name = "New password")]
            public string NewPassword { get; set; }

            [DataType(DataType.Password)]
            [Display(Name = "Confirm new password")]
            [Compare("NewPassword", ErrorMessage = "The new password and confirmation password do not match.")]
            public string ConfirmPassword { get; set; }
        }

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

            var hasPassword = await _userManager.HasPasswordAsync(user);
            if (!hasPassword)
            {
                return RedirectToPage("./SetPassword");
            }

            return Page();
        }

        public async Task<IActionResult> OnPostAsync()
        {
            if (!ModelState.IsValid)
            {
                return Page();
            }

            var user = await _userManager.GetUserAsync(User);
            if (user == null)
            {
                return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
            }

            var changePasswordResult = await _userManager.ChangePasswordAsync(user, Input.OldPassword, Input.NewPassword);
            if (!changePasswordResult.Succeeded)
            {
                foreach (var error in changePasswordResult.Errors)
                {
                    ModelState.AddModelError(string.Empty, error.Description);
                }
                return Page();
            }

            await _signInManager.RefreshSignInAsync(user);
            _logger.LogInformation("User changed their password successfully.");
            StatusMessage = "Your password has been changed.";

            return RedirectToPage();
        }
    }
}