// OpenTween - Client of Twitter
// Copyright (c) 2016 kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
// All rights reserved.
//
// This file is part of OpenTween.
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. If not, see <http://www.gnu.org/licenses/>, or write to
// the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
// Boston, MA 02110-1301, USA.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using Moq;
using OpenTween.Api;
using OpenTween.Api.DataModel;
using Xunit;

namespace OpenTween.Connection
{
    public class TwitterApiConnectionTest
    {
        public TwitterApiConnectionTest()
        {
            this.MyCommonSetup();
        }

        private void MyCommonSetup()
        {
            var mockAssembly = new Mock<_Assembly>();
            mockAssembly.Setup(m => m.GetName()).Returns(new AssemblyName("OpenTween"));

            MyCommon.EntryAssembly = mockAssembly.Object;
        }

        [Fact]
        public async Task GetAsync_Test()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            {
                apiConnection.http = http;

                mockHandler.Enqueue(x =>
                {
                    Assert.Equal(HttpMethod.Get, x.Method);
                    Assert.Equal("https://api.twitter.com/1.1/hoge/tetete.json",
                        x.RequestUri.GetLeftPart(UriPartial.Path));

                    var query = HttpUtility.ParseQueryString(x.RequestUri.Query);

                    Assert.Equal("1111", query["aaaa"]);
                    Assert.Equal("2222", query["bbbb"]);

                    return new HttpResponseMessage(HttpStatusCode.OK)
                    {
                        Content = new StringContent("\"hogehoge\""),
                    };
                });

                var endpoint = new Uri("hoge/tetete.json", UriKind.Relative);
                var param = new Dictionary<string, string>
                {
                    ["aaaa"] = "1111",
                    ["bbbb"] = "2222",
                };

                var result = await apiConnection.GetAsync<string>(endpoint, param, endpointName: "/hoge/tetete")
                    .ConfigureAwait(false);
                Assert.Equal("hogehoge", result);

                Assert.Equal(0, mockHandler.QueueCount);
            }
        }

        [Fact]
        public async Task GetAsync_AbsoluteUriTest()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            {
                apiConnection.http = http;

                mockHandler.Enqueue(x =>
                {
                    Assert.Equal(HttpMethod.Get, x.Method);
                    Assert.Equal("http://example.com/hoge/tetete.json",
                        x.RequestUri.GetLeftPart(UriPartial.Path));

                    var query = HttpUtility.ParseQueryString(x.RequestUri.Query);

                    Assert.Equal("1111", query["aaaa"]);
                    Assert.Equal("2222", query["bbbb"]);

                    return new HttpResponseMessage(HttpStatusCode.OK)
                    {
                        Content = new StringContent("\"hogehoge\""),
                    };
                });

                var endpoint = new Uri("http://example.com/hoge/tetete.json", UriKind.Absolute);
                var param = new Dictionary<string, string>
                {
                    ["aaaa"] = "1111",
                    ["bbbb"] = "2222",
                };

                await apiConnection.GetAsync<string>(endpoint, param, endpointName: "/hoge/tetete")
                    .ConfigureAwait(false);

                Assert.Equal(0, mockHandler.QueueCount);
            }
        }

        [Fact]
        public async Task GetAsync_UpdateRateLimitTest()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            {
                apiConnection.http = http;

                mockHandler.Enqueue(x =>
                {
                    Assert.Equal(HttpMethod.Get, x.Method);
                    Assert.Equal("https://api.twitter.com/1.1/hoge/tetete.json",
                        x.RequestUri.GetLeftPart(UriPartial.Path));

                    return new HttpResponseMessage(HttpStatusCode.OK)
                    {
                        Headers =
                        {
                            { "X-Rate-Limit-Limit", "150" },
                            { "X-Rate-Limit-Remaining", "100" },
                            { "X-Rate-Limit-Reset", "1356998400" },
                            { "X-Access-Level", "read-write-directmessages" },
                        },
                        Content = new StringContent("\"hogehoge\""),
                    };
                });

                var apiStatus = new TwitterApiStatus();
                MyCommon.TwitterApiInfo = apiStatus;

                var endpoint = new Uri("hoge/tetete.json", UriKind.Relative);

                await apiConnection.GetAsync<string>(endpoint, null, endpointName: "/hoge/tetete")
                    .ConfigureAwait(false);

                Assert.Equal(TwitterApiAccessLevel.ReadWriteAndDirectMessage, apiStatus.AccessLevel);
                Assert.Equal(new ApiLimit(150, 100, new DateTimeUtc(2013, 1, 1, 0, 0, 0)), apiStatus.AccessLimit["/hoge/tetete"]);

                Assert.Equal(0, mockHandler.QueueCount);
            }
        }

        [Fact]
        public async Task GetAsync_ErrorStatusTest()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            {
                apiConnection.http = http;

                mockHandler.Enqueue(x =>
                {
                    return new HttpResponseMessage(HttpStatusCode.BadGateway)
                    {
                        Content = new StringContent("### Invalid JSON Response ###"),
                    };
                });

                var endpoint = new Uri("hoge/tetete.json", UriKind.Relative);

                var exception = await Assert.ThrowsAsync<TwitterApiException>(() => apiConnection.GetAsync<string>(endpoint, null, endpointName: "/hoge/tetete"))
                    .ConfigureAwait(false);

                // エラーレスポンスの読み込みに失敗した場合はステータスコードをそのままメッセージに使用する
                Assert.Equal("BadGateway", exception.Message);
                Assert.Null(exception.ErrorResponse);

                Assert.Equal(0, mockHandler.QueueCount);
            }
        }

        [Fact]
        public async Task GetAsync_ErrorJsonTest()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            {
                apiConnection.http = http;

                mockHandler.Enqueue(x =>
                {
                    return new HttpResponseMessage(HttpStatusCode.Forbidden)
                    {
                        Content = new StringContent("{\"errors\":[{\"code\":187,\"message\":\"Status is a duplicate.\"}]}"),
                    };
                });

                var endpoint = new Uri("hoge/tetete.json", UriKind.Relative);

                var exception = await Assert.ThrowsAsync<TwitterApiException>(() => apiConnection.GetAsync<string>(endpoint, null, endpointName: "/hoge/tetete"))
                    .ConfigureAwait(false);

                // エラーレスポンスの JSON に含まれるエラーコードに基づいてメッセージを出力する
                Assert.Equal("DuplicateStatus", exception.Message);

                Assert.Equal(TwitterErrorCode.DuplicateStatus, exception.ErrorResponse.Errors[0].Code);
                Assert.Equal("Status is a duplicate.", exception.ErrorResponse.Errors[0].Message);

                Assert.Equal(0, mockHandler.QueueCount);
            }
        }

        [Fact]
        public async Task GetStreamAsync_Test()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            using (var image = TestUtils.CreateDummyImage())
            {
                apiConnection.http = http;

                mockHandler.Enqueue(x =>
                {
                    Assert.Equal(HttpMethod.Get, x.Method);
                    Assert.Equal("https://api.twitter.com/1.1/hoge/tetete.json",
                        x.RequestUri.GetLeftPart(UriPartial.Path));

                    var query = HttpUtility.ParseQueryString(x.RequestUri.Query);

                    Assert.Equal("1111", query["aaaa"]);
                    Assert.Equal("2222", query["bbbb"]);

                    return new HttpResponseMessage(HttpStatusCode.OK)
                    {
                        Content = new ByteArrayContent(image.Stream.ToArray()),
                    };
                });

                var endpoint = new Uri("hoge/tetete.json", UriKind.Relative);
                var param = new Dictionary<string, string>
                {
                    ["aaaa"] = "1111",
                    ["bbbb"] = "2222",
                };

                var stream = await apiConnection.GetStreamAsync(endpoint, param)
                    .ConfigureAwait(false);

                using (var memoryStream = new MemoryStream())
                {
                    // 内容の比較のために MemoryStream にコピー
                    await stream.CopyToAsync(memoryStream).ConfigureAwait(false);

                    Assert.Equal(image.Stream.ToArray(), memoryStream.ToArray());
                }

                Assert.Equal(0, mockHandler.QueueCount);
            }
        }

        [Fact]
        public async Task PostLazyAsync_Test()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            {
                apiConnection.http = http;

                mockHandler.Enqueue(async x =>
                {
                    Assert.Equal(HttpMethod.Post, x.Method);
                    Assert.Equal("https://api.twitter.com/1.1/hoge/tetete.json",
                        x.RequestUri.AbsoluteUri);

                    var body = await x.Content.ReadAsStringAsync()
                        .ConfigureAwait(false);
                    var query = HttpUtility.ParseQueryString(body);

                    Assert.Equal("1111", query["aaaa"]);
                    Assert.Equal("2222", query["bbbb"]);

                    return new HttpResponseMessage(HttpStatusCode.OK)
                    {
                        Content = new StringContent("\"hogehoge\""),
                    };
                });

                var endpoint = new Uri("hoge/tetete.json", UriKind.Relative);
                var param = new Dictionary<string, string>
                {
                    ["aaaa"] = "1111",
                    ["bbbb"] = "2222",
                };

                var result = await apiConnection.PostLazyAsync<string>(endpoint, param)
                    .ConfigureAwait(false);

                Assert.Equal("hogehoge", await result.LoadJsonAsync()
                    .ConfigureAwait(false));

                Assert.Equal(0, mockHandler.QueueCount);
            }
        }

        [Fact]
        public async Task PostLazyAsync_MultipartTest()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            {
                apiConnection.httpUpload = http;

                using (var image = TestUtils.CreateDummyImage())
                using (var media = new MemoryImageMediaItem(image))
                {
                    mockHandler.Enqueue(async x =>
                    {
                        Assert.Equal(HttpMethod.Post, x.Method);
                        Assert.Equal("https://api.twitter.com/1.1/hoge/tetete.json",
                            x.RequestUri.AbsoluteUri);

                        Assert.IsType<MultipartFormDataContent>(x.Content);

                        var boundary = x.Content.Headers.ContentType.Parameters.Cast<NameValueHeaderValue>()
                            .First(y => y.Name == "boundary").Value;

                        // 前後のダブルクオーテーションを除去
                        boundary = boundary.Substring(1, boundary.Length - 2);

                        var expectedText =
                            $"--{boundary}\r\n" +
                            "Content-Type: text/plain; charset=utf-8\r\n" +
                            "Content-Disposition: form-data; name=aaaa\r\n" +
                            "\r\n" +
                            "1111\r\n"+
                            $"--{boundary}\r\n" +
                            "Content-Type: text/plain; charset=utf-8\r\n" +
                            "Content-Disposition: form-data; name=bbbb\r\n" +
                            "\r\n" +
                            "2222\r\n" +
                            $"--{boundary}\r\n" +
                            $"Content-Disposition: form-data; name=media1; filename={media.Name}; filename*=utf-8''{media.Name}\r\n" +
                            "\r\n";

                        var expected = Encoding.UTF8.GetBytes(expectedText)
                            .Concat(image.Stream.ToArray())
                            .Concat(Encoding.UTF8.GetBytes($"\r\n--{boundary}--\r\n"));

                        Assert.Equal(expected, await x.Content.ReadAsByteArrayAsync().ConfigureAwait(false));

                        return new HttpResponseMessage(HttpStatusCode.OK)
                        {
                            Content = new StringContent("\"hogehoge\""),
                        };
                    });

                    var endpoint = new Uri("hoge/tetete.json", UriKind.Relative);
                    var param = new Dictionary<string, string>
                    {
                        ["aaaa"] = "1111",
                        ["bbbb"] = "2222",
                    };
                    var mediaParam = new Dictionary<string, IMediaItem>
                    {
                        ["media1"] = media,
                    };

                    var result = await apiConnection.PostLazyAsync<string>(endpoint, param, mediaParam)
                        .ConfigureAwait(false);

                    Assert.Equal("hogehoge", await result.LoadJsonAsync()
                        .ConfigureAwait(false));

                    Assert.Equal(0, mockHandler.QueueCount);
                }
            }
        }

        [Fact]
        public async Task PostLazyAsync_Multipart_NullTest()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            {
                apiConnection.httpUpload = http;

                mockHandler.Enqueue(async x =>
                {
                    Assert.Equal(HttpMethod.Post, x.Method);
                    Assert.Equal("https://api.twitter.com/1.1/hoge/tetete.json",
                        x.RequestUri.AbsoluteUri);

                    Assert.IsType<MultipartFormDataContent>(x.Content);

                    var boundary = x.Content.Headers.ContentType.Parameters.Cast<NameValueHeaderValue>()
                        .First(y => y.Name == "boundary").Value;

                    // 前後のダブルクオーテーションを除去
                    boundary = boundary.Substring(1, boundary.Length - 2);

                    var expectedText =
                        $"--{boundary}\r\n" +
                        $"\r\n--{boundary}--\r\n";

                    var expected = Encoding.UTF8.GetBytes(expectedText);

                    Assert.Equal(expected, await x.Content.ReadAsByteArrayAsync().ConfigureAwait(false));

                    return new HttpResponseMessage(HttpStatusCode.OK)
                    {
                        Content = new StringContent("\"hogehoge\""),
                    };
                });

                var endpoint = new Uri("hoge/tetete.json", UriKind.Relative);

                var result = await apiConnection.PostLazyAsync<string>(endpoint, param: null, media: null)
                    .ConfigureAwait(false);

                Assert.Equal("hogehoge", await result.LoadJsonAsync()
                    .ConfigureAwait(false));

                Assert.Equal(0, mockHandler.QueueCount);
            }
        }

        [Fact]
        public async Task PostJsonAsync_Test()
        {
            using (var mockHandler = new HttpMessageHandlerMock())
            using (var http = new HttpClient(mockHandler))
            using (var apiConnection = new TwitterApiConnection("", ""))
            {
                apiConnection.http = http;

                mockHandler.Enqueue(async x =>
                {
                    Assert.Equal(HttpMethod.Post, x.Method);
                    Assert.Equal("https://api.twitter.com/1.1/hoge/tetete.json",
                        x.RequestUri.AbsoluteUri);

                    Assert.Equal("application/json; charset=utf-8", x.Content.Headers.ContentType.ToString());

                    var body = await x.Content.ReadAsStringAsync()
                        .ConfigureAwait(false);

                    Assert.Equal("{\"aaaa\": 1111}", body);

                    return new HttpResponseMessage(HttpStatusCode.OK)
                    {
                        Content = new StringContent("\"hogehoge\""),
                    };
                });

                var endpoint = new Uri("hoge/tetete.json", UriKind.Relative);

                await apiConnection.PostJsonAsync(endpoint, "{\"aaaa\": 1111}")
                    .ConfigureAwait(false);

                Assert.Equal(0, mockHandler.QueueCount);
            }
        }
    }
}
