// 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.Linq;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.MoveStaticMembers;

internal readonly struct MoveStaticMembersOptions
{
    public bool IsCancelled { get; }

    public string FilePath { get; }

    public bool IsNewType { get; }

    // only has value when IsNewType is false
    public INamedTypeSymbol? Destination { get; }

    // only has value when IsNewType is true
    public string? TypeName { get; }

    // only has value when IsNewType is true
    public string? NamespaceDisplay { get; }

    public ImmutableArray<ISymbol> SelectedMembers { get; }

    public static MoveStaticMembersOptions Cancelled = new(
        string.Empty,
        string.Empty,
        [],
        isCancelled: true);

    public MoveStaticMembersOptions(
        INamedTypeSymbol destination,
        ImmutableArray<ISymbol> selectedMembers,
        bool isCancelled = false)
    {
        var sourceLocation = destination.DeclaringSyntaxReferences.First();
        RoslynDebug.AssertNotNull(sourceLocation.SyntaxTree);

        IsCancelled = isCancelled;
        FilePath = sourceLocation.SyntaxTree.FilePath;
        IsNewType = false;
        Destination = destination;
        TypeName = null;
        NamespaceDisplay = null;
        SelectedMembers = selectedMembers;
    }

    public MoveStaticMembersOptions(
        string fileName,
        string fullTypeName,
        ImmutableArray<ISymbol> selectedMembers,
        bool isCancelled = false)
    {
        IsCancelled = isCancelled;
        FilePath = fileName;
        IsNewType = true;
        Destination = null;
        var namespacesAndType = fullTypeName.Split(separator: '.');
        TypeName = namespacesAndType.Last();
        NamespaceDisplay = string.Join(separator: ".", namespacesAndType.Take(namespacesAndType.Length - 1));
        SelectedMembers = selectedMembers;
    }
}