using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;

namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        Visitatori x = new Visitatori();

        private string cartella;
        private bool modificato = false;
        private string Serial;

        public Form1()
        {
            cartella = Environment.CurrentDirectory;
            Serial = Path.Combine(cartella, "Save.dat");
            modificato = false;
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Deserialize();
            dataGridView1.DataSource = x.list;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            x.aggiungi(comboBox1.Text);
            x.ordina();

            dataGridView1.DataSource = null;
            dataGridView1.DataSource = x.list;

            modificato = true;
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            button1.Enabled = true;
        }

        private void Serialize()
        {
            using (Stream stream = File.Open(Serial, FileMode.Create))
            {
                    var binaryformatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                    binaryformatter.Serialize(stream, x.list);
            }
        }

        private void Deserialize()
        {
            if (File.Exists(Serial))
            {
                using (Stream stream = File.Open(Serial, FileMode.Open))
                {
                        var binaryformatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                        x.list = (List<Visitatore>)binaryformatter.Deserialize(stream);
                }

                dataGridView1.Visible = true;
            }
        }

        private void salvaToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Serialize();
            modificato = false;
        }

        private void esciToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (modificato == true)
            {
                DialogResult risposta = MessageBox.Show("Vuoi salvare le modifiche applicate?", "GuestBook", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                if (risposta.Equals(DialogResult.Yes))
                {
                    Serialize();
                }
                else if (risposta.Equals(DialogResult.No))
                {
                    Application.Exit();
                }
                else
                {
                    e.Cancel = (risposta.Equals(DialogResult.Cancel));
                }
            }
        }

        }
    }