// 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.Composition;
using Microsoft.CodeAnalysis.Host;
using Microsoft.CodeAnalysis.Host.Mef;

namespace Microsoft.CodeAnalysis.ExternalAccess.UnitTesting.SolutionCrawler;

internal sealed partial class UnitTestingSolutionCrawlerRegistrationService : IUnitTestingSolutionCrawlerRegistrationService
{
    /// <summary>
    /// nested class of <see cref="UnitTestingSolutionCrawlerRegistrationService"/> since it is tightly coupled with it.
    /// 
    /// <see cref="IUnitTestingSolutionCrawlerService"/> is implemented by this class since WorkspaceService doesn't allow a class to implement
    /// more than one <see cref="IWorkspaceService"/>.
    /// </summary>
    [ExportWorkspaceService(typeof(IUnitTestingSolutionCrawlerService), ServiceLayer.Default), Shared]
    internal sealed class UnitTestingSolutionCrawlerService : IUnitTestingSolutionCrawlerService
    {
        [ImportingConstructor]
        [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
        public UnitTestingSolutionCrawlerService()
        {
        }

        public void Reanalyze(string? workspaceKind, SolutionServices services, IUnitTestingIncrementalAnalyzer analyzer, IEnumerable<ProjectId>? projectIds = null, IEnumerable<DocumentId>? documentIds = null)
        {
            // if solution crawler doesn't exist for the given workspace. don't do anything
            if (services.GetService<IUnitTestingSolutionCrawlerRegistrationService>() is UnitTestingSolutionCrawlerRegistrationService registration)
            {
                registration.Reanalyze(workspaceKind, services, analyzer, projectIds, documentIds);
            }
        }

        public IUnitTestingSolutionCrawlerProgressReporter GetProgressReporter(Workspace workspace)
        {
            // if solution crawler doesn't exist for the given workspace, return null reporter
            if (workspace.Services.GetService<IUnitTestingSolutionCrawlerRegistrationService>() is UnitTestingSolutionCrawlerRegistrationService registration)
            {
                // currently we have only 1 global reporter that are shared by all workspaces.
                return registration._progressReporter;
            }

            return UnitTestingNullReporter.Instance;
        }
    }
}