// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using Microsoft.AspNetCore.Mvc.ApplicationParts;
using Microsoft.AspNetCore.Mvc.DataAnnotations;
using Microsoft.AspNetCore.Mvc.Razor;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Localization;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;

namespace Microsoft.AspNetCore.Mvc.Localization.Test;

public class MvcLocalizationMvcBuilderExtensionsTest
{
    public static TheoryData<IMvcBuilder> MvcBuilderExtensionsData()
    {
        var builder1 = new TestMvcBuilder();
        builder1.AddMvcLocalization();

        var builder2 = new TestMvcBuilder();
        builder2.AddMvcLocalization(LanguageViewLocationExpanderFormat.SubFolder);

        var builder3 = new TestMvcBuilder();
        builder3.AddMvcLocalization(localizationOptionsSetupAction: l => l.ResourcesPath = "Resources");

        var builder4 = new TestMvcBuilder();
        builder4.AddMvcLocalization(
            localizationOptionsSetupAction: l => l.ResourcesPath = "Resources",
            format: LanguageViewLocationExpanderFormat.SubFolder);

        return new TheoryData<IMvcBuilder>()
            {
                builder1, builder2, builder3, builder4
            };
    }

    [Theory]
    [MemberData(nameof(MvcBuilderExtensionsData))]
    public void AddsRequiredServices(IMvcBuilder mvcBuilder)
    {
        // Assert
        var services = mvcBuilder.Services;
        // Base localization services
        var service = services.FirstOrDefault(
            sd => sd.ServiceType == typeof(IStringLocalizerFactory));
        Assert.NotNull(service);
        Assert.Equal(ServiceLifetime.Singleton, service.Lifetime);
        Assert.Equal(typeof(ResourceManagerStringLocalizerFactory), service.ImplementationType);

        service = services.FirstOrDefault(
            sd => sd.ServiceType == typeof(IStringLocalizer<>));
        Assert.NotNull(service);
        Assert.Equal(ServiceLifetime.Transient, service.Lifetime);
        Assert.Equal(typeof(StringLocalizer<>), service.ImplementationType);

        // View localization services
        service = services.FirstOrDefault(
            sd => sd.ServiceType == typeof(IConfigureOptions<MvcDataAnnotationsLocalizationOptions>));
        Assert.NotNull(service);
        Assert.Equal(ServiceLifetime.Transient, service.Lifetime);

        service = services.FirstOrDefault(
            sd => sd.ServiceType == typeof(IConfigureOptions<RazorViewEngineOptions>));
        Assert.NotNull(service);
        Assert.Equal(ServiceLifetime.Singleton, service.Lifetime);

        service = services.FirstOrDefault(sd => sd.ServiceType == typeof(IHtmlLocalizerFactory));
        Assert.NotNull(service);
        Assert.Equal(typeof(HtmlLocalizerFactory), service.ImplementationType);
        Assert.Equal(ServiceLifetime.Singleton, service.Lifetime);

        service = services.FirstOrDefault(sd => sd.ServiceType == typeof(IHtmlLocalizer<>));
        Assert.NotNull(service);
        Assert.Equal(typeof(HtmlLocalizer<>), service.ImplementationType);
        Assert.Equal(ServiceLifetime.Transient, service.Lifetime);

        service = services.FirstOrDefault(sd => sd.ServiceType == typeof(IViewLocalizer));
        Assert.NotNull(service);
        Assert.Equal(typeof(ViewLocalizer), service.ImplementationType);
        Assert.Equal(ServiceLifetime.Transient, service.Lifetime);
    }

    [Fact]
    public void SetsLocalizationOptions_AsExpected()
    {
        // Arrange
        var builder = new TestMvcBuilder();

        // Act
        builder.AddMvcLocalization(
            localizationOptionsSetupAction: options => options.ResourcesPath = "TestResources");

        // Assert
        var serviceProvider = builder.Services.BuildServiceProvider();
        var actualOptions = serviceProvider.GetRequiredService<IOptions<LocalizationOptions>>();
        Assert.Equal("TestResources", actualOptions.Value.ResourcesPath);
    }

    [Fact]
    public void SetsDataAnnotationsOptions_AsExpected()
    {
        // Arrange
        var builder = new TestMvcBuilder();

        builder.Services.AddSingleton<ILoggerFactory>(NullLoggerFactory.Instance);

        var dataAnnotationLocalizerProvider = new Func<Type, IStringLocalizerFactory, IStringLocalizer>((type, factory) =>
        {
            return null;
        });

        // Act
        builder.AddMvcLocalization(
            dataAnnotationsLocalizationOptionsSetupAction: options
            => options.DataAnnotationLocalizerProvider = dataAnnotationLocalizerProvider);

        // Assert
        var serviceProvider = builder.Services.BuildServiceProvider();
        var actualOptions = serviceProvider.GetRequiredService<IOptions<MvcDataAnnotationsLocalizationOptions>>();
        Assert.Same(dataAnnotationLocalizerProvider, actualOptions.Value.DataAnnotationLocalizerProvider);
    }

    private ServiceDescriptor GetService(IServiceCollection services, Type serviceType)
    {
        return services.FirstOrDefault(sd => sd.ServiceType == serviceType);
    }

    private class TestMvcBuilder : IMvcBuilder
    {
        IServiceCollection _services;
        public IServiceCollection Services
        {
            get
            {
                if (_services == null)
                {
                    _services = new ServiceCollection();
                }
                return _services;
            }
        }

        public ApplicationPartManager PartManager => new ApplicationPartManager();
    }
}
