#region MIT license
// 
// MIT license
//
// Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// 
#endregion
using System.Collections.Generic;
using System.Data;
using DbLinq.Util;
using DbLinq.Vendor;

namespace DbLinq.Sqlite
{
    partial class SqliteSchemaLoader
    {
        protected virtual IDataTableColumn ReadColumn(IDataReader dataReader, string table)
        {
            var column = new DataTableColumn();
            column.TableSchema = "main";
            column.TableName = table;
            column.ColumnName = dataReader.GetString(1);
            column.UnpackRawDbType(dataReader.GetString(2));
            column.FullType = dataReader.GetString(2);
            column.Nullable = dataReader.GetInt64(3) == 0;
            column.PrimaryKey = dataReader.GetInt64(5) == 1;
            // SQLite says: if it is a primary key of integer type, then it is automatically generated
            column.Generated = column.PrimaryKey.Value && MapDbType(column.ColumnName, column) == typeof(int);
            return column;
        }

        protected override IList<IDataTableColumn> ReadColumns(IDbConnection connectionString, string databaseName)
        {
            var sql = string.Format(SelectTablesFormat, "");
            const string pragma = @"PRAGMA table_info('{0}');";

            return Schema.DataCommand.Find<IDataTableColumn>(connectionString, sql, pragma, ReadColumn);
        }
    }
}