/* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*
*  Licensed to Elasticsearch B.V. under one or more contributor
*  license agreements. See the NOTICE file distributed with
*  this work for additional information regarding copyright
*  ownership. Elasticsearch B.V. licenses this file to you under
*  the Apache License, Version 2.0 (the "License"); you may
*  not use this file except in compliance with the License.
*  You may obtain a copy of the License at
*
* 	http://www.apache.org/licenses/LICENSE-2.0
*
*  Unless required by applicable law or agreed to in writing,
*  software distributed under the License is distributed on an
*  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
*  KIND, either express or implied.  See the License for the
*  specific language governing permissions and limitations
*  under the License.
*/

using System;
using System.Threading.Tasks;
using OpenSearch.OpenSearch.Xunit.XunitPlumbing;
using OpenSearch.Net;
using FluentAssertions;
using OpenSearch.Client;
using Tests.Core.Client;
using Tests.Core.Client.Settings;
using Tests.Framework.Extensions;

namespace Tests.Framework.EndpointTests
{
	public abstract class UrlTestsBase
	{
		[U] public abstract Task Urls();
	}

	public static class UrlTesterExtensions
	{
		public static async Task<UrlTester> RequestAsync<TResponse>(this Task<UrlTester> tester, Func<IOpenSearchClient, Task<TResponse>> call)
			where TResponse : IResponse => await (await tester).WhenCallingAsync(call, "request async");

		public static async Task<UrlTester> FluentAsync<TResponse>(this Task<UrlTester> tester, Func<IOpenSearchClient, Task<TResponse>> call)
			where TResponse : IResponse => await (await tester).WhenCallingAsync(call, "fluent async");
	}

	public class UrlTester
	{
		internal UrlTester(HttpMethod method, string expectedUrl, Func<ConnectionSettings, ConnectionSettings> settings = null)
		{
			ExpectedHttpMethod = method;
			ExpectedUrl = expectedUrl;
			Client = settings == null
				? TestClient.DefaultInMemoryClient
				: new OpenSearchClient(settings(new AlwaysInMemoryConnectionSettings()));
		}

		private HttpMethod ExpectedHttpMethod { get; }
		private string ExpectedUrl { get; }
		private IOpenSearchClient Client { get; }

		public static UrlTester ExpectUrl(HttpMethod method, string url, Func<ConnectionSettings, ConnectionSettings> settings = null) =>
			new UrlTester(method, url, settings);

		// ReSharper disable InconsistentNaming
		public static UrlTester POST(string url) => new UrlTester(HttpMethod.POST, url);

		public static UrlTester PUT(string url) => new UrlTester(HttpMethod.PUT, url);

		public static UrlTester GET(string url) => new UrlTester(HttpMethod.GET, url);

		public static UrlTester HEAD(string url) => new UrlTester(HttpMethod.HEAD, url);

		public static UrlTester DELETE(string url) => new UrlTester(HttpMethod.DELETE, url);
		// ReSharper restore InconsistentNaming

		public static string EscapeUriString(string s) => Uri.EscapeDataString(s);

		public UrlTester Fluent<TResponse>(Func<IOpenSearchClient, TResponse> call) where TResponse : IResponse => WhenCalling(call, "fluent");

		public UrlTester Request<TResponse>(Func<IOpenSearchClient, TResponse> call) where TResponse : IResponse => WhenCalling(call, "request");

		public Task<UrlTester> FluentAsync<TResponse>(Func<IOpenSearchClient, Task<TResponse>> call) where TResponse : IResponse =>
			WhenCallingAsync(call, "fluent async");

		public Task<UrlTester> RequestAsync<TResponse>(Func<IOpenSearchClient, Task<TResponse>> call) where TResponse : IResponse =>
			WhenCallingAsync(call, "request async");

		public UrlTester LowLevel(Func<IOpenSearchLowLevelClient, IApiCallDetails> call)
		{
			var callDetails = call(Client.LowLevel);
			return Assert("lowlevel", callDetails);
		}
		public async Task<UrlTester> LowLevelAsync(Func<IOpenSearchLowLevelClient, Task<VoidResponse>> call)
		{
			var callDetails = await call(Client.LowLevel);
			return Assert("lowlevel async", callDetails);
		}

		private UrlTester WhenCalling<TResponse>(Func<IOpenSearchClient, TResponse> call, string typeOfCall)
			where TResponse : IResponse
		{
			var callDetails = call(Client);
			return Assert(typeOfCall, callDetails.ApiCall);
		}

		internal async Task<UrlTester> WhenCallingAsync<TResponse>(Func<IOpenSearchClient, Task<TResponse>> call, string typeOfCall)
			where TResponse : IResponse
		{
			var callDetails = (await call(Client)).ApiCall;
			return Assert(typeOfCall, callDetails);
		}

		private UrlTester Assert(string typeOfCall, IApiCallDetails callDetails)
		{
			var url = callDetails.Uri.PathAndQuery;
			callDetails.Uri.PathEquals(ExpectedUrl, typeOfCall);
			callDetails.HttpMethod.Should().Be(ExpectedHttpMethod, $"{typeOfCall} to {url}");
			return this;
		}
	}
}