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

namespace Payroll.BO
{
    public enum ConnectionType
    {
        SQL = 1,
        Oracle = 2,
        Oledb
    }
    public class Connection
    {
        public Connection() { }

        private string _Key = "";
        public string Key
        {
            get 
            {                
                return _DataSource + "-" + _DataBase + "-" + _UserID; ; 
            }
            set 
            {
                _Key = value; 
            }
        }

        private string _DataSource = "";
        public string DataSource
        {
            get { return _DataSource; }
            set { _DataSource = value; }
        }

        private string _DataBase = "";
        public string DataBase
        {
            get { return _DataBase; }
            set { _DataBase = value; }
        }

        private string _UserID = "";
        public string UserID
        {
            get { return _UserID; }
            set { _UserID = value; }
        }

        private string _Password = "";
        public string Password
        {
            get { return _Password; }
            set { _Password = value; }
        }

        private string _Provider = "";
        public string Provider
        {
            get { return _Provider; }
            set { _Provider = value; }
        }

        private ConnectionType _ConnectionType = ConnectionType.SQL;
        public ConnectionType ConnectionType
        {
            get 
            {
                if (_Provider == "MSDAORA")
                    _ConnectionType = ConnectionType.Oracle;
                else if (_Provider == "SQLOLEDB")
                    _ConnectionType = ConnectionType.SQL;
                else
                    _ConnectionType = ConnectionType.Oledb;
                return _ConnectionType; 
            }
            set { _ConnectionType = value; }
        }

        private string _ConnectionString = "";

        public string ConnectionString
        {
            get 
            {
                if(this.ConnectionType== ConnectionType.Oracle)
                    _ConnectionString="Data Source=" + _DataSource + ";User ID=" + _UserID + ";Password=" + _Password + ";";
                else if (this.ConnectionType == ConnectionType.SQL)
                {
                    if (this._UserID.ToLower() == "windows authentication")
                    {
                        _ConnectionString = "Data Source=" + this.DataSource + ";Initial Catalog=" + this.DataBase + ";integrated security=yes;Connect Timeout=10000";
                    }
                    else
                        _ConnectionString = "Data Source=" + this.DataSource + ";User ID=" + this.UserID + ";Password=" + this.Password + ";Initial Catalog=" + this.DataBase + ";Connect Timeout=10000";
                }
                else
                    _ConnectionString = "Provider=" + this.Provider + ";Data Source=" + this.DataSource + ";User ID=" + this.UserID + ";Password=" + this.Password + ";Initial Catalog=" + this.DataBase + ";Connect Timeout=10000"; ;

                return _ConnectionString;
            }
            set { _ConnectionString = value; }
        }

        public void Save()
        {
            try
            {
                DataSet config = new DataSet();
                string file = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\Connections.xml";

                if (File.Exists(file))
                {
                    config.ReadXml(file);
                    //if (config.Tables.Count == 0) return;
                    DataTable table = config.Tables["Connection"];
                    if (table != null)
                    {
                        table.PrimaryKey = new DataColumn[] { table.Columns[0] };

                        DataRow row = table.Rows.Find(this.Key);
                        if (row == null)
                        {
                            row = table.NewRow();
                            row["Key"] = this.Key;
                            row["DataSource"] = this.DataSource;
                            row["Provider"] = this.Provider;
                            row["Database"] = this.DataBase;
                            row["UserID"] = this.UserID;
                            row["Password"] = this.Password;
                            table.Rows.Add(row);
                            table.AcceptChanges();
                            config.WriteXml(file);
                        }
                    }
                    else
                    {
                        table = new DataTable("Connection");
                        table.Columns.Add("Key");
                        table.Columns.Add("DataSource");
                        table.Columns.Add("Provider");
                        table.Columns.Add("Database");
                        table.Columns.Add("UserID");
                        table.Columns.Add("Password");

                        DataRow row = table.NewRow();
                        row["Key"] = this.Key;
                        row["DataSource"] = this.DataSource;
                        row["Provider"] = this.Provider;
                        row["Database"] = this.DataBase;
                        row["UserID"] = this.UserID;
                        row["Password"] = this.Password;
                        table.Rows.Add(row);

                        config.Tables.Add(table);
                        config.WriteXml(file);
                    }

                }
                else
                {
                    DataTable table = new DataTable("Connection");
                    table.Columns.Add("Key");
                    table.Columns.Add("DataSource");
                    table.Columns.Add("Provider");
                    table.Columns.Add("Database");
                    table.Columns.Add("UserID");
                    table.Columns.Add("Password");

                    DataRow row = table.NewRow();
                    row["Key"] = this.Key;
                    row["DataSource"] = this.DataSource;
                    row["Provider"] = this.Provider;
                    row["Database"] = this.DataBase;
                    row["UserID"] = this.UserID;
                    row["Password"] = this.Password;
                    table.Rows.Add(row);

                    config.Tables.Add(table);
                    config.WriteXml(file);
                }
            }
            catch (Exception ex)
            {
                throw new Exception("Failed to Save connection. Error :\n" + ex.Message);
            }
        }

        public static void ClearAllConnection()
        {
            DataSet config = new DataSet();
            string file = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\Connections.xml";

            if (File.Exists(file))
            {
                config.ReadXml(file);
                if(config.Tables.Count==0)return;
                DataTable table = config.Tables["Connection"];
                if (table != null)
                {
                    table.Rows.Clear();
                    table.AcceptChanges();
                    config.WriteXml(file);
                }
            }
        }
    }



    public class Connections : CollectionBase
    {
        public void Add(Connection item)
        {
            InnerList.Add(item);
        }

        public Connection this[string key]
        {
            get
            {
                foreach (Connection con in this)
                {
                    if (con.Key.Equals(key)) return con;
                }
                return null;
            }
        }

        public Connections GetConnections()
        {
            try
            {
                DataSet config = new DataSet();
                string file = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\Connections.xml";

                //adnan for robi and warid deploy easyness
                if (!File.Exists(file))
                {
                    DataTable table = new DataTable("Connection");
                    table.Columns.Add("Key");
                    table.Columns.Add("DataSource");
                    table.Columns.Add("Provider");
                    table.Columns.Add("Database");
                    table.Columns.Add("UserID");
                    table.Columns.Add("Password");

                    DataRow row = table.NewRow();
                    row["Key"] = ".-WRDRFT-sa";
                    row["DataSource"] = @".\SQLExpress";
                    row["Provider"] = "SQLOLEDB";
                    row["Database"] = "WRDRFT";
                    row["UserID"] = "sa";
                    row["Password"] = "";
                    table.Rows.Add(row);

                    row = table.NewRow();
                    row["Key"] = ".-WRDRFT-sa";
                    row["DataSource"] = ".";
                    row["Provider"] = "SQLOLEDB";
                    row["Database"] = "WRDRFT";
                    row["UserID"] = "sa";
                    row["Password"] = "";
                    table.Rows.Add(row);

                    config.Tables.Add(table);
                    config.WriteXml(file);
                    config.Tables.Remove(table);
                }
                if (File.Exists(file)) //adnan for robi and warid deploy easyness                
                {
                    config.ReadXml(file);
                    if (config.Tables.Contains("Connection"))
                    {
                        DataTable table = config.Tables["Connection"];
                        Connection conection = null;
                        foreach (DataRow row in table.Rows)
                        {
                            conection = new Connection();
                            conection.DataSource=row["DataSource"].ToString();
                            conection.DataBase = row["Database"].ToString();
                            conection.Provider = row["Provider"].ToString();
                            conection.UserID = row["UserID"].ToString();
                            conection.Password = row["Password"].ToString();
                            this.Add(conection);
                        }
                    }
                }
                return this;
            }
            catch (Exception ex)
            {
                throw new Exception("Failed to Save connection. Error :\n" + ex.Message);
            }
        }
    }


}