// Copyright 2009-2022 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
using System;
using System.Reflection;

namespace CsvHelper.Configuration
{
	/// <summary>
	/// Mapping info for a reference parameter mapping to a class.
	/// </summary>
	public class ParameterReferenceMap
	{
		private readonly ParameterReferenceMapData data;

		/// <summary>
		/// Gets the parameter reference map data.
		/// </summary>
		public ParameterReferenceMapData Data => data;

		/// <summary>
		/// Initializes a new instance of the <see cref="ParameterReferenceMap"/> class.
		/// </summary>
		/// <param name="parameter">The parameter.</param>
		/// <param name="mapping">The <see cref="ClassMap"/> to use for the reference map.</param>
		public ParameterReferenceMap(ParameterInfo parameter, ClassMap mapping)
		{
			if (mapping == null)
			{
				throw new ArgumentNullException(nameof(mapping));
			}

			data = new ParameterReferenceMapData(parameter, mapping);
		}

		/// <summary>
		/// Appends a prefix to the header of each field of the reference parameter.
		/// </summary>
		/// <param name="prefix">The prefix to be prepended to headers of each reference parameter.</param>
		/// <param name="inherit">Inherit parent prefixes.</param>
		/// <returns>The current <see cref="ParameterReferenceMap" /></returns>
		public ParameterReferenceMap Prefix(string prefix = null, bool inherit = false)
		{
			if (string.IsNullOrEmpty(prefix))
			{
				prefix = data.Parameter.Name + ".";
			}

			data.Inherit = inherit;
			data.Prefix = prefix;

			return this;
		}

		/// <summary>
		/// Get the largest index for the
		/// members and references.
		/// </summary>
		/// <returns>The max index.</returns>
		internal int GetMaxIndex()
		{
			return data.Mapping.GetMaxIndex();
		}
	}
}