// 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.Collections.Immutable;
using System.Diagnostics;
using Microsoft.CodeAnalysis.Text;
 
namespace Microsoft.CodeAnalysis.InlineHints
{
    internal readonly struct TypeHint
    {
        private static readonly ImmutableArray<SymbolDisplayPart> s_spaceArray = ImmutableArray.Create(new SymbolDisplayPart(SymbolDisplayPartKind.Space, symbol: null, " "));
 
        public ITypeSymbol Type { get; }
        public TextSpan Span { get; }
        public TextChange? TextChange { get; }
        public ImmutableArray<SymbolDisplayPart> Prefix { get; }
        public ImmutableArray<SymbolDisplayPart> Suffix { get; }
 
        public TypeHint(ITypeSymbol type, TextSpan span, TextChange? textChange, bool leadingSpace = false, bool trailingSpace = false)
        {
            Type = type;
            Span = span;
            TextChange = textChange;
            Prefix = CreateSpaceSymbolPartArray(leadingSpace);
            Suffix = CreateSpaceSymbolPartArray(trailingSpace);
        }
 
        private static ImmutableArray<SymbolDisplayPart> CreateSpaceSymbolPartArray(bool hasSpace)
            => hasSpace ? s_spaceArray : ImmutableArray<SymbolDisplayPart>.Empty;
 
        public void Deconstruct(out ITypeSymbol type, out TextSpan span, out TextChange? textChange, out ImmutableArray<SymbolDisplayPart> prefix, out ImmutableArray<SymbolDisplayPart> suffix)
        {
            type = Type;
            span = Span;
            textChange = TextChange;
            prefix = Prefix;
            suffix = Suffix;
        }
    }
}