using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Windows.Forms;
using ServerExplorer.Code;

namespace ServerExplorer.UI
{
    public partial class FrmExec : Form
    {
        #region Declarations

        private readonly string _cnxString;

        #endregion

        #region Form life cycle

        public FrmExec(string cnxString)
        {
            InitializeComponent();

            _cnxString = cnxString;
        }

        #endregion

        #region Events

        private void btnExec_Click(object sender, EventArgs e)
        {
            try
            {
                DataTable dt = Exec();
                dgvDatos.DataSource = dt;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void btnGenInserts_Click(object sender, EventArgs e)
        {
            try
            {
                DataTable dataTable = Exec();

                List<string> listCmds = Utiles.DataTable_GenerateInserts(dataTable, txtDestTable.Text);

                // Preparar la datatable destino
                var destDataTable = new DataTable();
                destDataTable.Columns.Add("Cmd", typeof(String));
                foreach (string cmd in listCmds)
                {
                    destDataTable.Rows.Add(new object[] { cmd });
                }

                dgvDatos.DataSource = destDataTable;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void dgvDatos_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            if (e.DesiredType == typeof(Image))
            {
                if (e.Value is DBNull || (e.Value is byte[] && ((byte[])e.Value).Length <= 0))
                {
                    e.Value = new Bitmap(1, 1);
                }
            }
        }

        #endregion

        #region Private methods

        private DataTable Exec()
        {
            // Establecer conexion
            var cnx = new SqlConnection(_cnxString);

            // Obtener resultado en un datatable.
            var da = new SqlDataAdapter(txtCommand.Text, cnx);
            var dt = new DataTable();
            cnx.Open();
            da.Fill(dt);
            cnx.Close();

            return dt;
        }

        #endregion
    }
}