using App8.Services;
using App8.ViewModels;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Essentials;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace App8
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class Login : ContentPage
    {
        public Login()
        {
            InitializeComponent();
        }


        public async Task<bool> LoginAsync(string login, string senha)
        {
            var KeyValues = new List<KeyValuePair<string, string>>
            {
                new KeyValuePair<string, string >("login", login),
                new KeyValuePair<string, string >("senha", senha),

            };


            var request = new HttpRequestMessage(
                HttpMethod.Post, "http://10.83.1.72:3000/auth");

            request.Content = new FormUrlEncodedContent(KeyValues);

            var client = new HttpClient();
            var response = await client.SendAsync(request);
            var token = await response.Content.ReadAsStringAsync();




            if (response.StatusCode == System.Net.HttpStatusCode.OK)

            {

                await SaveToken("token", token);
                await SaveToken("login", login);
                await SaveToken("senha", senha);

                return true;


            }
            else
            {
                return false;


            }



        }





        public async Task<bool> SaveToken(string chave, string valor)
        {
            try
            {
                if (string.IsNullOrWhiteSpace(valor))
                {
                    await SecureStorage.SetAsync(chave, valor);
                    return true;

                }

                return false;
            }
            catch
            {
                return false;
            }

        }


        public async Task VerificarLogin()
        {
            LoginViewModel usuario = new LoginViewModel()
            {
                login = Convert.ToString(login.Text),
                senha = Convert.ToString(senha.Text)
            };
            if (await LoginAsync(usuario.login, usuario.senha) == true)
            {
                var token = await SecureStorage.GetAsync("token");
                var login = await SecureStorage.GetAsync("login");
                var senha = await SecureStorage.GetAsync("senha");
                await DisplayAlert("Alert", login + "Usuario com Sucesso!", "OK");
                await Navigation.PushAsync(new PageTwo()); /// COLOQUEI AQUI A PAGINA 2
            }
            else
            {

                await DisplayAlert("Alert", "Usuario ou Senha incorretos", "OK");
            }

        }

        public async Task<bool> verificarUsuarioLogado()
        {

            if (await SecureStorage.GetAsync("token") != null)
            {
                return true;

            }
            else
            {
                return false;
            }
        }






        private async void Button_Clicked(object sender, EventArgs e)
        {
            if (await verificarUsuarioLogado())
            {
                await Navigation.PushAsync(new PageTwo());

            }
            else
            {
                await VerificarLogin();

            }

        }

    }

}