// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;
using Identity.ExternalClaims.Data;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
 
namespace Identity.ExternalClaims.Pages.Account;
 
public class ResetPasswordModel : PageModel
{
    private readonly UserManager<ApplicationUser> _userManager;
 
    public ResetPasswordModel(UserManager<ApplicationUser> userManager)
    {
        _userManager = userManager;
    }
 
    [BindProperty]
    public InputModel Input { get; set; }
 
    public class InputModel
    {
        [Required]
        [EmailAddress]
        public string Email { get; set; }
 
        [Required]
        [StringLength(100, ErrorMessage = "The {0} must be at least {2} and at max {1} characters long.", MinimumLength = 6)]
        [DataType(DataType.Password)]
        public string Password { get; set; }
 
        [DataType(DataType.Password)]
        [Display(Name = "Confirm password")]
        [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
        public string ConfirmPassword { get; set; }
 
        public string Code { get; set; }
    }
 
    public IActionResult OnGet(string code = null)
    {
        if (code == null)
        {
            throw new ApplicationException("A code must be supplied for password reset.");
        }
        else
        {
            Input = new InputModel
            {
                Code = code
            };
            return Page();
        }
    }
 
    public async Task<IActionResult> OnPostAsync()
    {
        if (!ModelState.IsValid)
        {
            return Page();
        }
 
        var user = await _userManager.FindByEmailAsync(Input.Email);
        if (user == null)
        {
            // Don't reveal that the user does not exist
            return RedirectToPage("./ResetPasswordConfirmation");
        }
 
        var result = await _userManager.ResetPasswordAsync(user, Input.Code, Input.Password);
        if (result.Succeeded)
        {
            return RedirectToPage("./ResetPasswordConfirmation");
        }
 
        foreach (var error in result.Errors)
        {
            ModelState.AddModelError(string.Empty, error.Description);
        }
        return Page();
    }
}