// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Runtime.CompilerServices;
using System.Text;
 
#pragma warning disable IDE0060 // Remove unused parameter - https://github.com/dotnet/roslyn/issues/58168
 
namespace Roslyn.Utilities
{
    internal static partial class Contract
    {
        [InterpolatedStringHandler]
        public readonly struct ThrowIfTrueInterpolatedStringHandler
        {
            private readonly StringBuilder _stringBuilder;
 
            public ThrowIfTrueInterpolatedStringHandler(int literalLength, int formattedCount, bool condition, out bool success)
            {
                _stringBuilder = condition ? new StringBuilder(capacity: literalLength) : null!;
                success = condition;
            }
 
            public void AppendLiteral(string value) => _stringBuilder.Append(value);
 
            public void AppendFormatted<T>(T value) => _stringBuilder.Append(value?.ToString());
 
            public string GetFormattedText() => _stringBuilder.ToString();
        }
 
        [InterpolatedStringHandler]
        public readonly struct ThrowIfFalseInterpolatedStringHandler
        {
            private readonly StringBuilder _stringBuilder;
 
            public ThrowIfFalseInterpolatedStringHandler(int literalLength, int formattedCount, bool condition, out bool success)
            {
                _stringBuilder = condition ? null! : new StringBuilder(capacity: literalLength);
                success = !condition;
            }
 
            public void AppendLiteral(string value) => _stringBuilder.Append(value);
 
            public void AppendFormatted<T>(T value) => _stringBuilder.Append(value?.ToString());
 
            public string GetFormattedText() => _stringBuilder.ToString();
        }
 
        [InterpolatedStringHandler]
        public readonly struct ThrowIfNullInterpolatedStringHandler<T>
        {
            private readonly StringBuilder _stringBuilder;
 
            public ThrowIfNullInterpolatedStringHandler(int literalLength, int formattedCount, T? value, out bool success)
            {
                _stringBuilder = value is null ? new StringBuilder(capacity: literalLength) : null!;
                success = value is null;
            }
 
            public void AppendLiteral(string value) => _stringBuilder.Append(value);
 
            public void AppendFormatted<T2>(T2 value) => _stringBuilder.Append(value?.ToString());
 
            public string GetFormattedText() => _stringBuilder.ToString();
        }
    }
}