/* 
 *                                dbMango
 *
 * Copyright 2025 Deutsche Bank AG
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
namespace Rms.Risk.Mango.Language.Ast;

public class AstSortField : AstNodeBase
{
    public enum SortOrder { Ascending, Descending }
    
    public AstSortField(){}
    public AstSortField( string name, SortOrder order )
    {
        Name = name;
        Order = order;
    }

    public string Name { get;  internal set{ field = PreprocessFieldName(value); } } = "";
    public SortOrder Order { get; internal set; } = SortOrder.Ascending;

    public override void Append(StringBuilder sb, int indent)
    {
        sb.Append(Spaces(indent));
        AppendField(sb, Name);

        if ( Order != SortOrder.Ascending )
            sb.Append(" DESC");
    }

    public override JsonNode? AsJson()
    {
        var val = JsonValue.Create(Order == SortOrder.Ascending ? 1 : -1);
        return new JsonObject([new(Name, val)]);
    }
}
