using System;
using System.Collections.Generic;
using System.Data;
using System.Globalization;
using System.IO;
using System.Text;

namespace ServerExplorer.Code
{
    public static class Utiles
    {
        #region File Utils

        public static void CrearDirectorio(this String path)
        {
            DirectoryInfo info;
            try
            {
                info = new DirectoryInfo(path);
            }
            catch (Exception)
            {
                info = new DirectoryInfo(".");
            }
            CrearDirectorio(info);
        }

        public static void CrearDirectorio(this DirectoryInfo info)
        {
            if (info.Parent != null) CrearDirectorio(info.Parent);
            if (!info.Exists) info.Create();
        }

        #endregion

        #region DataTable Utils

        public static List<string> DataTable_GenerateInserts(DataTable dataTable, string destTable)
        {
            var nfi = new NumberFormatInfo { NumberDecimalSeparator = "." };

            var listCmds = new List<string>();

            // Recorrer la tabla de datos
            foreach (DataRow dr in dataTable.Rows)
            {
                var sbColumns = new StringBuilder();
                var sbValues = new StringBuilder();
                foreach (DataColumn dc in dataTable.Columns)
                {
                    // El nombre de la columna
                    if (sbColumns.Length > 0) { sbColumns.Append(", "); }
                    sbColumns.AppendFormat("[{0}]", dc.ColumnName);

                    // El valor de la columna
                    if (sbValues.Length > 0) { sbValues.Append(", "); }
                    object valor = dr[dc];
                    if (valor == DBNull.Value || valor == null)
                    {
                        // NULOS
                        sbValues.Append("NULL");
                    }
                    else
                    {
                        string type = dc.DataType.Name.ToLower();
                        if (type == "string")
                        {
                            // Cadenas
                            sbValues.AppendFormat("'{0}'", ((string)valor).Replace("'", "''"));
                        }
                        else if (type == "int" || type == "int32" || type == "int64")
                        {
                            // int
                            sbValues.Append(((int)valor).ToString(nfi));
                        }
                        else if (type == "long" || type == "int64")
                        {
                            // long
                            sbValues.Append(((long)valor).ToString(nfi));
                        }
                        else if (type == "decimal")
                        {
                            // Decimales
                            sbValues.Append(((decimal)valor).ToString(nfi));
                        }
                        else if (type == "bit" || type == "bool" || type == "boolean")
                        {
                            // Booleanos
                            sbValues.Append(((bool)valor) ? "1" : "0");
                        }
                        else if (type == "byte[]")
                        {
                            // Arrays de bytes (imagenes, archivos etc)
                            sbValues.AppendFormat("0x{0}", BitConverter.ToString(((byte[])valor)).Replace("-", ""));
                        }
                        else if (type == "datetime")
                        {
                            // DateTIme
                            sbValues.AppendFormat("'{0}'", ((DateTime)valor).ToString("yyyy-MM-dd HH:mm:ss"));
                        }
                        else
                        {
                            // Otros
                            sbValues.AppendFormat("'{0}'", valor.ToString());
                        }

                    }
                }

                // Insertar fila a la datatable destino
                listCmds.Add(String.Format("INSERT INTO {0} ({1}) VALUES ({2});",
                            destTable, sbColumns.ToString(), sbValues.ToString()));
            }

            return listCmds;
        }

        #endregion
    }
}