// 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.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Contracts.EditAndContinue;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.EditAndContinue.UnitTests;
 
internal sealed class MockManagedEditAndContinueDebuggerService : IManagedHotReloadService
{
    public Func<Guid, ManagedHotReloadAvailability>? IsEditAndContinueAvailable;
    public Dictionary<Guid, ManagedHotReloadAvailability>? LoadedModules;
    public Func<ImmutableArray<ManagedActiveStatementDebugInfo>>? GetActiveStatementsImpl;
    public Func<ImmutableArray<string>>? GetCapabilitiesImpl;
 
    public ValueTask<ImmutableArray<ManagedActiveStatementDebugInfo>> GetActiveStatementsAsync(CancellationToken cancellationToken)
        => ValueTaskFactory.FromResult(GetActiveStatementsImpl?.Invoke() ?? []);
 
    public ValueTask<ManagedHotReloadAvailability> GetAvailabilityAsync(Guid mvid, CancellationToken cancellationToken)
    {
        if (IsEditAndContinueAvailable != null)
        {
            return ValueTaskFactory.FromResult(IsEditAndContinueAvailable(mvid));
        }
 
        if (LoadedModules != null)
        {
            return ValueTaskFactory.FromResult(LoadedModules.TryGetValue(mvid, out var result) ? result : new ManagedHotReloadAvailability(ManagedHotReloadAvailabilityStatus.ModuleNotLoaded));
        }
 
        throw new NotImplementedException();
    }
 
    public ValueTask<ImmutableArray<string>> GetCapabilitiesAsync(CancellationToken cancellationToken)
        => ValueTaskFactory.FromResult(GetCapabilitiesImpl?.Invoke() ?? ["Baseline", "AddDefinitionToExistingType", "NewTypeDefinition"]);
 
    public ValueTask PrepareModuleForUpdateAsync(Guid mvid, CancellationToken cancellationToken)
        => ValueTaskFactory.CompletedTask;
}