// 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
using Xunit;
using System.Dynamic;
using System.Globalization;
using System.IO;
using System.Text;

namespace CsvHelper.Tests.Writing
{
	
	public class MultipleHeadersTest
	{
		[Fact]
		public void GenericTypeTest()
		{
			using (var writer = new StringWriter())
			using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))
			{
				csv.WriteHeader<A>();
				csv.NextRecord();
				csv.WriteRecord(new A { Id = 1 });
				csv.NextRecord();

				csv.WriteHeader<B>();
				csv.NextRecord();
				csv.WriteRecord(new B { Name = "one" });
				csv.NextRecord();
				writer.Flush();

				var expected = new TestStringBuilder(csv.Configuration.NewLine);
				expected.AppendLine("Id");
				expected.AppendLine("1");
				expected.AppendLine("Name");
				expected.AppendLine("one");

				Assert.Equal(expected.ToString(), writer.ToString());
			}
		}

		[Fact]
		public void DynamicTypeTest()
		{
			using (var writer = new StringWriter())
			using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))
			{
				dynamic a = new ExpandoObject();
				a.Id = 1;
				csv.WriteDynamicHeader(a);
				csv.NextRecord();
				csv.WriteRecord(a);
				csv.NextRecord();

				dynamic b = new ExpandoObject();
				b.Name = "one";
				csv.WriteDynamicHeader(b);
				csv.NextRecord();
				csv.WriteRecord(b);
				csv.NextRecord();
				writer.Flush();

				var expected = new TestStringBuilder(csv.Configuration.NewLine);
				expected.AppendLine("Id");
				expected.AppendLine("1");
				expected.AppendLine("Name");
				expected.AppendLine("one");

				Assert.Equal(expected.ToString(), writer.ToString());
			}
		}

		private class A
		{
			public int Id { get; set; }
		}

		private class B
		{
			public string? Name { get; set; }
		}
	}
}
