// 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;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Text;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.CSharp.EditAndContinue;

/// <summary>
/// C() : this(...) { ... }
/// C() : base(...) { ... }
/// 
/// C() : this(...) => ...
/// C() : base(...) => ...
/// </summary>
internal sealed class OrdinaryInstanceConstructorWithExplicitInitializerDeclarationBody(ConstructorDeclarationSyntax constructor)
    : OrdinaryInstanceConstructorDeclarationBody(constructor)
{
    private ConstructorInitializerSyntax Initializer
        => Constructor.Initializer!;

    public override bool HasExplicitInitializer
        => true;

    public override SyntaxNode InitializerActiveStatement
        => Initializer;

    public override TextSpan InitializerActiveStatementSpan
        => BreakpointSpans.CreateSpanForExplicitConstructorInitializer(Initializer);

    public override ImmutableArray<ISymbol> GetCapturedVariables(SemanticModel model)
        => model.AnalyzeDataFlow(Initializer)!.CapturedInside.AddRange(model.AnalyzeDataFlow(Body).CapturedInside).Distinct();

    public override TextSpan Envelope
        => TextSpan.FromBounds(InitializerActiveStatementSpan.Start, Body.Span.End);

    public override IEnumerable<SyntaxToken> GetActiveTokens(Func<SyntaxNode, IEnumerable<SyntaxToken>> getDescendantTokens)
        => BreakpointSpans.GetActiveTokensForExplicitConstructorInitializer(Initializer, getDescendantTokens).Concat(getDescendantTokens(Body));

    public override IEnumerable<SyntaxToken> GetUserCodeTokens(Func<SyntaxNode, IEnumerable<SyntaxToken>> getDescendantTokens)
        => getDescendantTokens(Initializer).Concat(getDescendantTokens(Body));
}