using System.Net;
using System.Text;
using System.Text.Json;
using FluentAssertions;
using VRCAuthProxy.Tests.Helpers;
using VRCAuthProxy.types;
using WireMock.RequestBuilders;
using WireMock.ResponseBuilders;
using Xunit;

namespace VRCAuthProxy.Tests.Integration
{
    public class VRChatAuthenticationTests : IClassFixture<TestSetup>
    {
        private readonly TestSetup _testSetup;

        public VRChatAuthenticationTests(TestSetup testSetup)
        {
            _testSetup = testSetup;
        }

        [Fact]
        public async Task Authentication_WithValidCredentials_ShouldReturnUserInfo()
        {
            // Arrange
            var mockServer = _testSetup.MockVRChatApi;
            
            // Mock the authentication endpoint
            mockServer.Given(Request.Create()
                    .WithPath("/api/1/auth/user")
                    .UsingGet()
                    .WithHeader("Authorization", "*")) // Accept any authorization header
                .RespondWith(Response.Create()
                    .WithStatusCode(200)
                    .WithHeader("Content-Type", "application/json")
                    .WithHeader("Set-Cookie", "auth=test-auth-token; path=/; secure; httponly")
                    .WithBodyAsJson(new User { displayName = "TestUser" }));
            
            // Create a client with the test setup
            var handler = new HttpClientHandler { UseCookies = true };
            var mockServerUrls = mockServer.Urls;
            if (mockServerUrls == null || !mockServerUrls.Any())
            {
                throw new InvalidOperationException("Mock server URLs not available");
            }
            var httpClient = new HttpClient(handler)
            {
                BaseAddress = new Uri(mockServerUrls.First())
            };
            
            // Act
            string username = "testuser";
            string password = "testpassword";
            string authString = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{username}:{password}"));
            
            var request = new HttpRequestMessage(HttpMethod.Get, "/api/1/auth/user");
            request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", authString);
            var response = await httpClient.SendAsync(request);
            
            // Assert
            response.StatusCode.Should().Be(HttpStatusCode.OK);
            
            // Verify the response can be parsed
            var responseContent = await response.Content.ReadAsStringAsync();
            var user = JsonSerializer.Deserialize<User>(responseContent);
            user.Should().NotBeNull();
            user!.displayName.Should().Be("TestUser");
        }
        
        [Fact]
        public async Task Authentication_WithTOTP_ShouldVerifyAndProvideUserInfo()
        {
            // Arrange
            var mockServer = _testSetup.MockVRChatApi;
            
            // Mock API behavior when TOTP is required
            mockServer.Given(Request.Create()
                    .WithPath("/api/1/auth/user")
                    .UsingGet()
                    .WithHeader("Authorization", "*"))
                .RespondWith(Response.Create()
                    .WithStatusCode(200)
                    .WithHeader("Content-Type", "application/json")
                    .WithBody(@"{""requiresTwoFactorAuth"":true,""totp"":true}"));
            
            // Mock TOTP verification endpoint
            mockServer.Given(Request.Create()
                    .WithPath("/api/1/auth/twofactorauth/totp/verify")
                    .UsingPost()
                    .WithBody(x => x != null && x.Contains("code")))
                .RespondWith(Response.Create()
                    .WithStatusCode(200)
                    .WithHeader("Content-Type", "application/json")
                    .WithHeader("Set-Cookie", "auth=totp-verified-token; path=/; secure; httponly")
                    .WithBodyAsJson(new TotpVerifyResponse { verified = true }));
            
            // Mock user info after successful TOTP verification
            mockServer.Given(Request.Create()
                    .WithPath("/api/1/auth/user")
                    .UsingGet()
                    .WithCookie("auth", "totp-verified-token"))
                .RespondWith(Response.Create()
                    .WithStatusCode(200)
                    .WithHeader("Content-Type", "application/json")
                    .WithBodyAsJson(new User { displayName = "TOTPVerifiedUser" }));
            
            // Create a client with the test setup
            var handler = new HttpClientHandler { UseCookies = true };
            var mockServerUrls = mockServer.Urls;
            if (mockServerUrls == null || !mockServerUrls.Any())
            {
                throw new InvalidOperationException("Mock server URLs not available");
            }
            var httpClient = new HttpClient(handler)
            {
                BaseAddress = new Uri(mockServerUrls.First())
            };
            
            // Act - First authenticate which will indicate TOTP is required
            string username = "totpuser";
            string password = "totppassword";
            string authString = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{username}:{password}"));
            
            var request = new HttpRequestMessage(HttpMethod.Get, "/api/1/auth/user");
            request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", authString);
            var response = await httpClient.SendAsync(request);
            
            // Assert initial response
            response.StatusCode.Should().Be(HttpStatusCode.OK);
            var initialContent = await response.Content.ReadAsStringAsync();
            initialContent.Should().Contain("requiresTwoFactorAuth");
            
            // Now verify with TOTP
            var verifyReq = new HttpRequestMessage(HttpMethod.Post, "/api/1/auth/twofactorauth/totp/verify");
            verifyReq.Content = new StringContent(@"{""code"":""123456""}", Encoding.UTF8, "application/json");
            var verifyResp = await httpClient.SendAsync(verifyReq);
            
            // Assert TOTP verification
            verifyResp.StatusCode.Should().Be(HttpStatusCode.OK);
            var verifyContent = await verifyResp.Content.ReadAsStringAsync();
            var verifyResult = JsonSerializer.Deserialize<TotpVerifyResponse>(verifyContent);
            verifyResult.Should().NotBeNull();
            verifyResult!.verified.Should().BeTrue();
        }
    }
}