using System;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;
using System.Windows.Forms;

namespace ServerExplorer.UI
{
    public partial class FrmServidores : Form
    {
        public FrmServidores()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
        }

        private void btnListarServidores_Click(object sender, EventArgs e)
        {
            // Obtener listado de servidores
            SqlDataSourceEnumerator enumerador = SqlDataSourceEnumerator.Instance;
            DataTable servidores = enumerador.GetDataSources();
            lsvServidores.Items.Clear();
            lsvBBDD.Items.Clear();
            foreach (DataRow dr in servidores.Rows)
            {
                ListViewItem item = lsvServidores.Items.Add((String)dr["ServerName"]);
                item.SubItems.Add((dr["InstanceName"] == DBNull.Value) ? string.Empty : (String)dr["InstanceName"]);
                item.SubItems.Add((dr["Version"] == DBNull.Value) ? "???" : (String) dr["Version"]);
            }
        }

        private void lsvServidores_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (lsvServidores.SelectedItems.Count > 0)
            {
                ListViewItem item = lsvServidores.SelectedItems[0];
                txtServidor.Text = String.IsNullOrEmpty(item.SubItems[1].Text)
                                       ? item.SubItems[0].Text
                                       : String.Format("{0}/{1}", item.SubItems[0].Text, item.SubItems[1].Text);
            }
        }

        private void btnListarBBDD_Click(object sender, EventArgs e)
        {
            // Obtener todas las bases de datos
            var cnx = new SqlConnection(BuildConnectionString());
            cnx.Open();
            DataTable dt = cnx.GetSchema("Databases");
            cnx.Close();

            // Mostrar bases de datos
            lsvBBDD.Items.Clear();
            foreach (DataRow dr in dt.Rows)
            {
                ListViewItem item = lsvBBDD.Items.Add((String)dr["database_name"]);
                item.SubItems.Add(((DateTime)dr["create_date"]).ToShortDateString());
            }
        }


        private void lsvBBDD_DoubleClick(object sender, EventArgs e)
        {
            if (lsvBBDD.SelectedItems.Count != 1) return;

            // Llamar a la venta de la base de datos
            var frm = new FrmBaseDatos(BuildConnectionString());
            FrmPrincipal.AddForm(frm);
        }

        private string BuildConnectionString()
        {
            // Construir cadena de conexion
            var constructor = new SqlConnectionStringBuilder();
            constructor.DataSource = (!string.IsNullOrEmpty(txtServidor.Text)) ? txtServidor.Text : "localhost";
            if (lsvBBDD.SelectedItems.Count > 0)
            {
                constructor.InitialCatalog = lsvBBDD.SelectedItems[0].SubItems[0].Text;
            }
            if (String.IsNullOrEmpty(txtUsuario.Text))
            {
                constructor.IntegratedSecurity = true;
            }
            else
            {
                constructor.UserID = txtUsuario.Text;
                constructor.Password = TxtContrasenha.Text;
            }
            return constructor.ConnectionString;
        }
    }
}