using System;
using System.Data;
using System.Data.Common;

// System.Data.SqlServerCe.dll must be referenced.
// http://www.microsoft.com/sql/editions/compact/default.mspx
//
using System.Data.SqlServerCe;

namespace BLToolkit.Data.DataProvider
{
    using Sql.SqlProvider;

    /// <summary>
    /// Implements access to the Data Provider for Microsoft SQL Server 2005 Everywhere Edition
    /// </summary>
    /// <remarks>
    /// See the <see cref="DbManager.AddDataProvider(DataProviderBase)"/> method to find an example.
    /// </remarks>
    /// <seealso cref="DbManager.AddDataProvider(DataProviderBase)">AddDataManager Method</seealso>
    public sealed class SqlCeDataProvider: DataProviderBase
    {
        /// <summary>
        /// Creates the database connection object.
        /// </summary>
        /// <remarks>
        /// See the <see cref="DbManager.AddDataProvider(DataProviderBase)"/> method to find an example.
        /// </remarks>
        /// <seealso cref="DbManager.AddDataProvider(DataProviderBase)">AddDataManager Method</seealso>
        /// <returns>The database connection object.</returns>
        public override IDbConnection CreateConnectionObject()
        {
            return new SqlCeConnection();
        }

        /// <summary>
        /// Creates the data adapter object.
        /// </summary>
        /// <remarks>
        /// See the <see cref="DbManager.AddDataProvider(DataProviderBase)"/> method to find an example.
        /// </remarks>
        /// <seealso cref="DbManager.AddDataProvider(DataProviderBase)">AddDataManager Method</seealso>
        /// <returns>A data adapter object.</returns>
        public override DbDataAdapter CreateDataAdapterObject()
        {
            return new SqlCeDataAdapter();
        }

        /// <summary>
        /// Populates the specified IDbCommand object's Parameters collection with 
        /// parameter information for the stored procedure specified in the IDbCommand.
        /// </summary>
        /// <remarks>
        /// See the <see cref="DbManager.AddDataProvider(DataProviderBase)"/> method to find an example.
        /// </remarks>
        /// <seealso cref="DbManager.AddDataProvider(DataProviderBase)">AddDataManager Method</seealso>
        /// <param name="command">The IDbCommand referencing the stored procedure for which the parameter information is to be derived. The derived parameters will be populated into the Parameters of this command.</param>
        public override bool DeriveParameters(IDbCommand command)
        {
            // SqlCeCommandBuilder does not implement DeriveParameters.
            // This is not surprising, since SQL/e has no support for stored procs.
            //
            return false;
        }

        public override object Convert(object value, ConvertType convertType)
        {
            switch (convertType)
            {
                case ConvertType.NameToQueryParameter:
                case ConvertType.NameToCommandParameter:
                case ConvertType.NameToSprocParameter:
                    return "@" + value;

                case ConvertType.NameToQueryField:
                case ConvertType.NameToQueryFieldAlias:
                case ConvertType.NameToQueryTableAlias:
                    {
                        string name = value.ToString();

                        if (name.Length > 0 && name[0] == '[')
                            return value;
                    }

                    return "[" + value + "]";

                case ConvertType.NameToDatabase:
                case ConvertType.NameToOwner:
                case ConvertType.NameToQueryTable:
                    {
                        string name = value.ToString();

                        if (name.Length > 0 && name[0] == '[')
                            return value;

                        if (name.IndexOf('.') > 0)
                            value = string.Join("].[", name.Split('.'));
                    }

                    return "[" + value + "]";

                case ConvertType.SprocParameterToName:
                    if (value != null)
                    {
                        string str = value.ToString();
                        return str.Length > 0 && str[0] == '@'? str.Substring(1): str;
                    }
                    break;

                case ConvertType.ExceptionToErrorNumber:
                    if (value is SqlCeException)
                        return ((SqlCeException)value).NativeError;
                    break;
            }

            return value;
        }

        /// <summary>
        /// Returns connection type.
        /// </summary>
        /// <remarks>
        /// See the <see cref="DbManager.AddDataProvider(DataProviderBase)"/> method to find an example.
        /// </remarks>
        /// <seealso cref="DbManager.AddDataProvider(DataProviderBase)">AddDataManager Method</seealso>
        /// <value>An instance of the <see cref="Type"/> class.</value>
        public override Type ConnectionType
        {
            get { return typeof(SqlCeConnection); }
        }

        /// <summary>
        /// Returns the data provider name.
        /// </summary>
        /// <remarks>
        /// See the <see cref="DbManager.AddDataProvider(DataProviderBase)"/> method to find an example.
        /// </remarks>
        /// <seealso cref="DbManager.AddDataProvider(DataProviderBase)">AddDataProvider Method</seealso>
        /// <value>Data provider name.</value>
        public override string Name
        {
            get { return DataProvider.ProviderName.SqlCe; }
        }

        public override int MaxBatchSize
        {
            get { return 0; }
        }

        public override ISqlProvider CreateSqlProvider()
        {
            return new SqlCeSqlProvider(this);
        }

        public override void SetParameterValue(IDbDataParameter parameter, object value)
        {

            base.SetParameterValue(parameter, value);
        }
    }
}