using System.Net;
using System.Net.Http.Json;
using System.Text.Json;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using NSubstitute;
using Xunit;
using XiangYi.AppApi;
using XiangYi.Application.DTOs.Requests;
using XiangYi.Application.DTOs.Responses;
using XiangYi.Application.Interfaces;

namespace XiangYi.Api.Tests.AppApi;

/// <summary>
/// 聊天控制器集成测试
/// </summary>
public class ChatControllerIntegrationTests : IClassFixture<WebApplicationFactory<IAppApiMarker>>
{
    private readonly WebApplicationFactory<IAppApiMarker> _factory;
    private readonly IChatService _mockChatService;

    public ChatControllerIntegrationTests(WebApplicationFactory<IAppApiMarker> factory)
    {
        _mockChatService = Substitute.For<IChatService>();
        
        _factory = factory.WithWebHostBuilder(builder =>
        {
            builder.UseEnvironment("Testing");
            builder.ConfigureServices(services =>
            {
                services.RemoveAll<IChatService>();
                services.AddSingleton(_mockChatService);
                
                services.AddAuthentication(options =>
                {
                    options.DefaultAuthenticateScheme = TestAuthHandler.AuthenticationScheme;
                    options.DefaultChallengeScheme = TestAuthHandler.AuthenticationScheme;
                })
                .AddScheme<AuthenticationSchemeOptions, TestAuthHandler>(
                    TestAuthHandler.AuthenticationScheme, options => { });
            });
        });
    }

    /// <summary>
    /// 测试获取会话列表 - 成功
    /// </summary>
    [Fact]
    public async Task GetSessions_WithAuth_ReturnsSuccess()
    {
        // Arrange
        var expectedSessions = new List<ChatSessionResponse>
        {
            new ChatSessionResponse
            {
                SessionId = 1,
                OtherUserId = 2,
                OtherNickname = "用户2",
                LastMessageContent = "你好",
                LastMessageTime = DateTime.Now,
                UnreadCount = 1
            }
        };

        _mockChatService.GetSessionsAsync(1)
            .Returns(Task.FromResult(expectedSessions));

        var client = _factory.CreateClient();
        client.DefaultRequestHeaders.Add("Authorization", "Bearer test-token-1");

        // Act
        var response = await client.GetAsync("/api/app/chat/sessions");

        // Assert
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        
        var content = await response.Content.ReadAsStringAsync();
        var result = JsonSerializer.Deserialize<ApiResponse<List<ChatSessionResponse>>>(content,
            new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
        
        Assert.NotNull(result);
        Assert.Equal(0, result.Code);
        Assert.NotNull(result.Data);
        Assert.Single(result.Data);
    }

    /// <summary>
    /// 测试获取消息列表 - 成功
    /// </summary>
    [Fact]
    public async Task GetMessages_WithAuth_ReturnsSuccess()
    {
        // Arrange
        var expectedMessages = new PagedResult<ChatMessageResponse>
        {
            Items = new List<ChatMessageResponse>
            {
                new ChatMessageResponse
                {
                    MessageId = 1,
                    SenderId = 1,
                    Content = "你好",
                    MessageType = 1,
                    CreateTime = DateTime.Now
                }
            },
            Total = 1,
            PageIndex = 1,
            PageSize = 20
        };

        _mockChatService.CanAccessSessionAsync(1, 100)
            .Returns(Task.FromResult(true));
        _mockChatService.GetMessagesAsync(1, Arg.Any<GetMessagesRequest>())
            .Returns(Task.FromResult(expectedMessages));
        _mockChatService.MarkMessagesAsReadAsync(1, 100)
            .Returns(Task.FromResult(1));

        var client = _factory.CreateClient();
        client.DefaultRequestHeaders.Add("Authorization", "Bearer test-token-1");

        // Act
        var response = await client.GetAsync("/api/app/chat/messages?sessionId=100&pageIndex=1&pageSize=20");

        // Assert
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        
        var content = await response.Content.ReadAsStringAsync();
        var result = JsonSerializer.Deserialize<ApiResponse<PagedResult<ChatMessageResponse>>>(content,
            new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
        
        Assert.NotNull(result);
        Assert.Equal(0, result.Code);
        Assert.NotNull(result.Data);
        Assert.Single(result.Data.Items);
    }

    /// <summary>
    /// 测试获取消息列表 - 无权限访问会话
    /// </summary>
    [Fact]
    public async Task GetMessages_NoAccess_ReturnsForbidden()
    {
        // Arrange
        _mockChatService.CanAccessSessionAsync(1, 100)
            .Returns(Task.FromResult(false));

        var client = _factory.CreateClient();
        client.DefaultRequestHeaders.Add("Authorization", "Bearer test-token-1");

        // Act
        var response = await client.GetAsync("/api/app/chat/messages?sessionId=100");

        // Assert
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        
        var content = await response.Content.ReadAsStringAsync();
        var result = JsonSerializer.Deserialize<ApiResponse<PagedResult<ChatMessageResponse>>>(content,
            new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
        
        Assert.NotNull(result);
        Assert.NotEqual(0, result.Code); // 应返回错误码
    }

    /// <summary>
    /// 测试发送消息 - 成功
    /// </summary>
    [Fact]
    public async Task SendMessage_WithAuth_ReturnsSuccess()
    {
        // Arrange
        var expectedResponse = new SendMessageResponse
        {
            MessageId = 100,
            CreateTime = DateTime.Now
        };

        _mockChatService.CanAccessSessionAsync(1, 100)
            .Returns(Task.FromResult(true));
        _mockChatService.SendMessageAsync(1, Arg.Any<SendMessageRequest>())
            .Returns(Task.FromResult(expectedResponse));

        var client = _factory.CreateClient();
        client.DefaultRequestHeaders.Add("Authorization", "Bearer test-token-1");
        
        var request = new SendMessageRequest
        {
            SessionId = 100,
            ReceiverId = 2,
            Content = "你好",
            MessageType = 1
        };

        // Act
        var response = await client.PostAsJsonAsync("/api/app/chat/send", request);

        // Assert
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        
        var content = await response.Content.ReadAsStringAsync();
        var result = JsonSerializer.Deserialize<ApiResponse<SendMessageResponse>>(content,
            new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
        
        Assert.NotNull(result);
        Assert.Equal(0, result.Code);
        Assert.NotNull(result.Data);
        Assert.Equal(expectedResponse.MessageId, result.Data.MessageId);
    }

    /// <summary>
    /// 测试请求交换微信 - 成功
    /// </summary>
    [Fact]
    public async Task ExchangeWeChat_WithAuth_ReturnsSuccess()
    {
        // Arrange
        var expectedResponse = new ExchangeRequestResponse
        {
            RequestMessageId = 100,
            CreateTime = DateTime.Now
        };

        _mockChatService.CanAccessSessionAsync(1, 100)
            .Returns(Task.FromResult(true));
        _mockChatService.ExchangeWeChatAsync(1, Arg.Any<ExchangeWeChatRequest>())
            .Returns(Task.FromResult(expectedResponse));

        var client = _factory.CreateClient();
        client.DefaultRequestHeaders.Add("Authorization", "Bearer test-token-1");
        
        var request = new ExchangeWeChatRequest
        {
            SessionId = 100,
            ReceiverId = 2
        };

        // Act
        var response = await client.PostAsJsonAsync("/api/app/chat/exchangeWeChat", request);

        // Assert
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        
        var content = await response.Content.ReadAsStringAsync();
        var result = JsonSerializer.Deserialize<ApiResponse<ExchangeRequestResponse>>(content,
            new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
        
        Assert.NotNull(result);
        Assert.Equal(0, result.Code);
        Assert.NotNull(result.Data);
        Assert.Equal(100, result.Data.RequestMessageId);
    }

    /// <summary>
    /// 测试响应交换请求 - 同意
    /// </summary>
    [Fact]
    public async Task RespondExchange_Agree_ReturnsSuccess()
    {
        // Arrange
        var expectedResponse = new ExchangeRespondResponse
        {
            ResultMessageId = 101,
            IsAgreed = true,
            ExchangedData = "wx123456"
        };

        _mockChatService.RespondExchangeAsync(1, Arg.Any<RespondExchangeRequest>())
            .Returns(Task.FromResult(expectedResponse));

        var client = _factory.CreateClient();
        client.DefaultRequestHeaders.Add("Authorization", "Bearer test-token-1");
        
        var request = new RespondExchangeRequest
        {
            RequestMessageId = 100,
            IsAgreed = true
        };

        // Act
        var response = await client.PostAsJsonAsync("/api/app/chat/respondExchange", request);

        // Assert
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        
        var content = await response.Content.ReadAsStringAsync();
        var result = JsonSerializer.Deserialize<ApiResponse<ExchangeRespondResponse>>(content,
            new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
        
        Assert.NotNull(result);
        Assert.Equal(0, result.Code);
        Assert.NotNull(result.Data);
        Assert.True(result.Data.IsAgreed);
    }

    /// <summary>
    /// 测试获取未读消息数 - 成功
    /// </summary>
    [Fact]
    public async Task GetUnreadCount_WithAuth_ReturnsSuccess()
    {
        // Arrange
        _mockChatService.GetUnreadCountAsync(1)
            .Returns(Task.FromResult(5));

        var client = _factory.CreateClient();
        client.DefaultRequestHeaders.Add("Authorization", "Bearer test-token-1");

        // Act
        var response = await client.GetAsync("/api/app/chat/unreadCount");

        // Assert
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        
        var content = await response.Content.ReadAsStringAsync();
        var result = JsonSerializer.Deserialize<ApiResponse<int>>(content,
            new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
        
        Assert.NotNull(result);
        Assert.Equal(0, result.Code);
        Assert.Equal(5, result.Data);
    }
}