using System.Net;
using System.Security.Cryptography;
using System.Text;
using FluentAssertions;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Moq;
using Oms.Domain.SystemAggregate.Consts;
using Oms.Domain.SystemAggregate.Entities;
using Oms.Domain.SystemAggregate.Repositories;
using SimpleAdmin.Api.IntegrationTests.Support;
using SimpleAdmin.Api.WeChat.Options;

namespace SimpleAdmin.Api.IntegrationTests;

public class WeChatRouteIntegrationTests
{
    [Fact]
    public async Task WeChatLegacyVerification_ShouldRegisterGetOnly()
    {
        await using var host = await SimpleAdminApiTestHost.CreateAsync(configureServices: ConfigureWeChatFallback);

        var methods = host.GetHttpMethods("apiwechat/verification");
        methods.Should().BeEquivalentTo(["GET"]);
    }

    [Fact]
    public async Task WeChatRoutes_ShouldBeRegisteredOnAuthService()
    {
        await using var host = await SimpleAdminApiTestHost.CreateAsync(configureServices: ConfigureWeChatFallback);

        host.RoutePatterns.Should().Contain("apiwechat/verification");
        host.RoutePatterns.Should().Contain("wechat/mp/{appId}");
        host.RoutePatterns.Should().Contain("wechat/mp/login-qrcode");
        host.RoutePatterns.Should().Contain("wechat/oauth/user-info");
        host.RoutePatterns.Should().Contain("wechat/customer/register");
        host.RoutePatterns.Should().Contain("wechat/customer/bind");
        host.RoutePatterns.Should().Contain("rbac/auth/wx-login/status");
    }

    [Fact]
    public async Task WeChatValidateLegacy_ShouldReturnEchostrWhenSignatureValid()
    {
        await using var host = await SimpleAdminApiTestHost.CreateAsync(configureServices: services =>
        {
            ConfigureWeChatFallback(services);
            services.PostConfigure<WeChatMpOptions>(options => options.Token = "test-token");
        });

        const string timestamp = "1400000000";
        const string nonce = "nonce";
        const string echostr = "hello-wechat";
        var signature = SignWeChat("test-token", timestamp, nonce);

        var response = await host.Client.GetAsync(
            $"/apiwechat/verification?signature={signature}&timestamp={timestamp}&nonce={nonce}&echostr={echostr}");

        response.StatusCode.Should().Be(HttpStatusCode.OK);
        (await response.Content.ReadAsStringAsync()).Should().Be(echostr);
    }

    [Fact]
    public async Task WeChatValidateLegacy_ShouldReturnEchostrAsPlainTextWithoutJsonWrapper()
    {
        await using var host = await SimpleAdminApiTestHost.CreateAsync(configureServices: services =>
        {
            ConfigureWeChatFallback(services);
            services.PostConfigure<WeChatMpOptions>(options => options.Token = "test-token");
        });

        const string timestamp = "1400000000";
        const string nonce = "nonce";
        const string echostr = "5938472619053847261";
        var signature = SignWeChat("test-token", timestamp, nonce);

        var response = await host.Client.GetAsync(
            $"/apiwechat/verification?signature={signature}&timestamp={timestamp}&nonce={nonce}&echostr={echostr}");

        response.StatusCode.Should().Be(HttpStatusCode.OK);
        response.Content.Headers.ContentType?.MediaType.Should().Be("text/plain");
        var body = await response.Content.ReadAsStringAsync();
        body.Should().Be(echostr);
        body.Should().NotStartWith("{");
    }

    private static void ConfigureWeChatFallback(IServiceCollection services)
    {
        services.PostConfigure<WeChatMpOptions>(options =>
        {
            options.Token = "test-token";
            options.AppId = "wx-test";
        });

        var repository = new Mock<ISystemOtherConfigRepository>();
        repository
            .Setup(x => x.GetByConfigCodeAsync(SystemOtherConfigCodes.WeChatMp, It.IsAny<CancellationToken>()))
            .ReturnsAsync((SystemOtherConfig?)null);
        services.RemoveAll<ISystemOtherConfigRepository>();
        services.AddSingleton(repository.Object);
    }

    private static string SignWeChat(string token, string timestamp, string nonce)
    {
        var parts = new[] { token, timestamp, nonce }.OrderBy(x => x, StringComparer.Ordinal).ToArray();
        var hash = SHA1.HashData(Encoding.UTF8.GetBytes(string.Concat(parts)));
        return Convert.ToHexString(hash).ToLowerInvariant();
    }
}