using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WepApp.BL
{
    public class Utility
    {
        /// <summary>Aggiunge un cookie</summary>
    /// <param name="key">Chiave</param>
    /// <param name="value">Valore</param>
    /// <param name="expire">Data di scadenza</param>
    /// <returns>L'esito</returns>
    public bool AddCookie(string key, string value, DateTime? expire = null)
        {
            try
            {
                HttpCookie cookie = new HttpCookie(key, value)
                {
                    Path = "/",
                    Shareable = true
                };
                if (expire != null)
                    cookie.Expires = (DateTime)expire;
                HttpContext.Current.Response.Cookies.Set(cookie);
                return true;
            }
            catch { }
            return false;
        }

        /// <summary>Legge il valore di un cookie</summary>
    /// <typeparam name="T">Tipo da leggere</typeparam>
    /// <param name="key">Chiave</param>
    /// <param name="defValue">Valore di default</param>
    /// <returns>Valore trovato oppure default</returns>
    public T ReadCookie<T>(string key, T defValue = default(T))
            where T : IConvertible
        {
            try
            {
                HttpCookie cookie = HttpContext.Current.Request.Cookies[key];
                return cookie != null
                    ? (T)Convert.ChangeType(cookie.Value, typeof(T))
                    : defValue;
            }
            catch { }
            return defValue;
        }

        /// <summary>Elimina un cookie</summary>
    /// <param name="name">Nome del cookie da eliminare</param>
    /// <returns>L'esito</returns>
    public bool RemoveCookie(string name)
        {
            try
            {
                HttpCookie cookie = HttpContext.Current.Response.Cookies[name];
                if (cookie != null)
                    cookie.Expires = DateTime.Now.AddDays(-1d);
                return true;
            }
            catch (Exception) { }
            return false;
        }
    }
}

private void RecuperaCookie()
        {
            try
            {
                // Controllo il cookie per vedere se devo mostrare la form
                Utility utility = new Utility();
                string cookieLogin = utility.ReadCookie("UtenteLogin", "");
                if (cookieLogin.IsNullOrEmpty())
                    return;
                cookieLogin = cookieLogin.Decrypt();
                string[] split = cookieLogin.Split(';');
                if (split.Length != 2)
                    return;
                txtEmail.Text = split[0];
                txtPassword.Attributes.Add("value", split[1]);
                chkRemeber.Checked = true;
            }
            catch (Exception ex)
            {
                CaricaAlert(this.Page, "Attenzione!", $"Ops...qualcosa non va. {ex.Message}", "Warning");
                log.Error($"Errore sul RecuperaCookie Index. Messaggio: {ex.Message}", ex);
            }
        }

        private void SettaCookie()
        {
            try
            {
                Utility utility = new Utility();
                DateTime scadenza = DateTime.Now.AddYears(100);
                string dati = $"{txtEmail.Text};{txtPassword.Text}".Encrypt();
                utility.AddCookie("UtenteLogin", dati, scadenza);
            }
            catch (Exception ex)
            {
                CaricaAlert(this.Page, "Attenzione!", $"Ops...qualcosa non va. {ex.Message}", "Warning");
                log.Error($"Errore sul SettaCookie Index. Messaggio: {ex.Message}", ex);
            }
        }