// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;

namespace Microsoft.AspNetCore.Routing
{
    public abstract class LinkParserTestBase
    {
        protected ServiceCollection GetBasicServices()
        {
            var services = new ServiceCollection();
            services.AddOptions();
            services.AddRouting();
            services.AddLogging();
            return services;
        }

        protected virtual void AddAdditionalServices(IServiceCollection services)
        {
        }

        private protected DefaultLinkParser CreateLinkParser(params Endpoint[] endpoints)
        {
            return CreateLinkParser(configureServices: null, endpoints);
        }

        private protected DefaultLinkParser CreateLinkParser(
            Action<IServiceCollection> configureServices,
            params Endpoint[] endpoints)
        {
            return CreateLinkParser(configureServices, new[] { new DefaultEndpointDataSource(endpoints ?? Array.Empty<Endpoint>()) });
        }

        private protected DefaultLinkParser CreateLinkParser(EndpointDataSource[] dataSources)
        {
            return CreateLinkParser(configureServices: null, dataSources);
        }

        private protected DefaultLinkParser CreateLinkParser(
            Action<IServiceCollection> configureServices,
            EndpointDataSource[] dataSources)
        {
            var services = GetBasicServices();
            AddAdditionalServices(services);
            configureServices?.Invoke(services);

            services.Configure<RouteOptions>(o =>
            {
                if (dataSources != null)
                {
                    foreach (var dataSource in dataSources)
                    {
                        o.EndpointDataSources.Add(dataSource);
                    }
                }
            });

            var serviceProvider = services.BuildServiceProvider();
            var routeOptions = serviceProvider.GetRequiredService<IOptions<RouteOptions>>();

            return new DefaultLinkParser(
                new DefaultParameterPolicyFactory(routeOptions, serviceProvider),
                new CompositeEndpointDataSource(routeOptions.Value.EndpointDataSources),
                serviceProvider.GetRequiredService<ILoggerFactory>().CreateLogger<DefaultLinkParser>(),
                serviceProvider);
        }
    }
}