// Copyright 2009-2024 Josh Close
// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
// https://github.com/JoshClose/CsvHelper
namespace CsvHelper.Expressions;

/// <summary>
/// Writes expando objects.
/// </summary>
public class ExpandoObjectRecordWriter : RecordWriter
{
	/// <summary>
	/// Initializes a new instance using the given writer.
	/// </summary>
	/// <param name="writer">The writer.</param>
	public ExpandoObjectRecordWriter(CsvWriter writer) : base(writer) { }

	/// <summary>
	/// Creates a <see cref="Delegate"/> of type <see cref="Action{T}"/>
	/// that will write the given record using the current writer row.
	/// </summary>
	/// <typeparam name="T">The record type.</typeparam>
	/// <param name="recordType">The record.</param>
	protected override Action<T> CreateWriteDelegate<T>(Type recordType)
	{
		Action<T> action = r =>
		{
			var dict = ((IDictionary<string, object>)r!).AsEnumerable();

			if (Writer.Configuration.DynamicPropertySort != null)
			{
				dict = dict.OrderBy(pair => pair.Key, Writer.Configuration.DynamicPropertySort);
			}

			var values = dict.Select(pair => pair.Value);
			foreach (var val in values)
			{
				Writer.WriteField(val);
			}
		};

		return action;
	}
}
