using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text.Encodings.Web;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI.Services;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.Extensions.Logging;
using Blazored.SessionStorage;
using BlazorApp.Helper;
using BWPMModels;
using System.Windows.Forms;

namespace BlazorApp.Areas.Identity.Pages.Account

{
    [AllowAnonymous]
    public class LoginModel : PageModel
    {
        private readonly UserManager<IdentityUser> _userManager;
        private readonly SignInManager<IdentityUser> _signInManager;
        private readonly ILogger<LoginModel> _logger;
        private readonly RoleManager<IdentityRole> _roleManager;
        private SessionState sessionState;
        private string rurl = "";
        public LoginModel(SignInManager<IdentityUser> signInManager,
            ILogger<LoginModel> logger,
            UserManager<IdentityUser> userManager)
        {
            _userManager = userManager;
            _signInManager = signInManager;
            _logger = logger;
            _logger = logger;
        }

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

        public IList<AuthenticationScheme> ExternalLogins { get; set; }

        public string ReturnUrl { get; set; }

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

        public class InputModel
        {
            [Required]
            [EmailAddress]
            public string Email { get; set; }

            [Required]
            [DataType(DataType.Password)]
            public string Password { get; set; }

            [Display(Name = "Remember me?")]
            public bool RememberMe { get; set; }
        }

        public async Task OnGetAsync(string returnUrl = null)
        {
            string autologin = "";
            Helper.ParameterHelper ph = new Helper.ParameterHelper();
            autologin = ph.GetParameter("autologin");
            if (autologin == "true")
            {
               await AutoLogin(returnUrl);
                //returnUrl = returnUrl ?? Url.Content("~/");
                //ReturnUrl = returnUrl;
                Response.Redirect(rurl);
            }
            if (!string.IsNullOrEmpty(ErrorMessage))
            {
                ModelState.AddModelError(string.Empty, ErrorMessage);
            }
            
            returnUrl = returnUrl ?? Url.Content("~/");

            // Clear the existing external cookie to ensure a clean login process
            await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);

            ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();

            ReturnUrl = returnUrl;
        }

        public async Task<IActionResult> OnPostAsync(string returnUrl = null)
        {
            returnUrl = returnUrl ?? Url.Content("~/");

            if (ModelState.IsValid)
            {
                // This doesn't count login failures towards account lockout
                // To enable password failures to trigger account lockout, set lockoutOnFailure: true
                var result = await _signInManager.PasswordSignInAsync(Input.Email, Input.Password, Input.RememberMe, lockoutOnFailure: false);
                if (result.Succeeded)
                {
                    dbhelper dbh = new dbhelper();
                    dbh.Get_Tabledata("SELECT dbo.AspNetUsers.Email, dbo.AspNetRoles.Name, dbo.AspNetUsers.Id FROM dbo.AspNetUsers INNER JOIN  dbo.AspNetUserRoles ON dbo.AspNetUsers.Id = dbo.AspNetUserRoles.UserId INNER JOIN  dbo.AspNetRoles ON dbo.AspNetUserRoles.RoleId = dbo.AspNetRoles.Id where dbo.aspnetusers.email='" + Input.Email + "'", false, true);
                    if (dbh.dsdaten.Tables[0].Rows.Count>0)
                    {
                        if (dbh.dsdaten.Tables[0].Rows[0]["Name"].ToString()=="Lehrer") { returnUrl = "/Teacher/Dashboard"; }
                        if (dbh.dsdaten.Tables[0].Rows[0]["Name"].ToString() == "Firma") { returnUrl = "/Company/Dashboard"; }
                        if (dbh.dsdaten.Tables[0].Rows[0]["Name"].ToString() == "Administrators") { returnUrl = "/Admin/Dashboard"; }

                    };
                    _logger.LogInformation("User logged in.");

                    return LocalRedirect(returnUrl);
                }
                if (result.RequiresTwoFactor)
                {
                    return RedirectToPage("./LoginWith2fa", new { ReturnUrl = returnUrl, RememberMe = Input.RememberMe });
                }
                if (result.IsLockedOut)
                {
                    _logger.LogWarning("User account locked out.");
                    return RedirectToPage("./Lockout");
                }
                else
                {
                    ModelState.AddModelError(string.Empty, "Invalid login attempt.");
                    return Page();
                }
            }

            // If we got this far, something failed, redisplay form
            return Page();
        }

        [HttpPost]
        [AllowAnonymous]
        public async Task<IActionResult> AutoLogin(string returnUrl)
        {
         
            if (ModelState.IsValid)
            {
                string EMail = "info@shub.ch";
                string Password = "Admin*123";
                Helper.ParameterHelper ph = new Helper.ParameterHelper();
                EMail = ph.GetParameter("autologin_user");
                Password = ph.GetParameter("autologin_pw");
                var result = await _signInManager.PasswordSignInAsync(EMail, Password, false, lockoutOnFailure: false);
                if (result.Succeeded)
                {
                    _logger.LogInformation("User logged in.");
                    //returnUrl = returnUrl ?? Url.Content("~/");
                    dbhelper dbh = new dbhelper();
                    dbh.Get_Tabledata("SELECT dbo.AspNetUsers.Email, dbo.AspNetRoles.Name, dbo.AspNetUsers.Id FROM dbo.AspNetUsers INNER JOIN  dbo.AspNetUserRoles ON dbo.AspNetUsers.Id = dbo.AspNetUserRoles.UserId INNER JOIN  dbo.AspNetRoles ON dbo.AspNetUserRoles.RoleId = dbo.AspNetRoles.Id where dbo.aspnetusers.email='" + EMail + "'", false, true);
                    if (dbh.dsdaten.Tables[0].Rows.Count > 0)
                    {
                        if (dbh.dsdaten.Tables[0].Rows[0]["Name"].ToString() == "Lehrer") { returnUrl = "/Teacher/Dashboard"; }
                        if (dbh.dsdaten.Tables[0].Rows[0]["Name"].ToString() == "Firma") { returnUrl = "/Company/Dashboard"; }
                        if (dbh.dsdaten.Tables[0].Rows[0]["Name"].ToString() == "Administrators") { returnUrl = "/Admin/Dashboard"; }

                    };
                    rurl = returnUrl;
                    return LocalRedirect(returnUrl);
                }

                
            }

            return BadRequest();
        }
    }
}