// 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.Diagnostics;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Options;

namespace Microsoft.CodeAnalysis.Shared.Extensions;

internal static partial class ProjectExtensions
{
    internal static Project WithSolutionOptions(this Project project, OptionSet options)
        => project.Solution.WithOptions(options).GetProject(project.Id)!;

    public static TextDocument? GetTextDocument(this Project project, DocumentId? documentId)
        => project.Solution.GetTextDocument(documentId);

    internal static DocumentId? GetDocumentForExternalLocation(this Project project, Location location)
    {
        Debug.Assert(location.Kind == LocationKind.ExternalFile);
        return project.GetDocumentIdWithFilePath(location.GetLineSpan().Path);
    }

    internal static DocumentId? GetDocumentForFile(this Project project, AdditionalText additionalText)
        => project.GetDocumentIdWithFilePath(additionalText.Path);

    private static DocumentId? GetDocumentIdWithFilePath(this Project project, string filePath)
        => project.Solution.GetDocumentIdsWithFilePath(filePath).FirstOrDefault(id => id.ProjectId == project.Id);

    public static Document GetRequiredDocument(this Project project, DocumentId documentId)
        => project.GetDocument(documentId) ?? throw ISolutionExtensions.CreateDocumentNotFoundException(documentId);

    public static Document GetRequiredDocument(this Project project, SyntaxTree tree)
        => project.GetDocument(tree) ?? throw ISolutionExtensions.CreateDocumentNotFoundException(tree.FilePath);

    public static TextDocument GetRequiredAdditionalDocument(this Project project, DocumentId documentId)
        => project.GetAdditionalDocument(documentId) ?? throw ISolutionExtensions.CreateDocumentNotFoundException(documentId);

    public static TextDocument GetRequiredAnalyzerConfigDocument(this Project project, DocumentId documentId)
        => project.GetAnalyzerConfigDocument(documentId) ?? throw ISolutionExtensions.CreateDocumentNotFoundException(documentId);

    public static TextDocument GetRequiredTextDocument(this Project project, DocumentId documentId)
        => project.GetTextDocument(documentId) ?? throw ISolutionExtensions.CreateDocumentNotFoundException(documentId);

    public static async ValueTask<Document> GetRequiredSourceGeneratedDocumentAsync(this Project project, DocumentId documentId, CancellationToken cancellationToken)
    {
        var document = await project.GetSourceGeneratedDocumentAsync(documentId, cancellationToken).ConfigureAwait(false);
        return document ?? throw ISolutionExtensions.CreateDocumentNotFoundException(documentId);
    }
}