using System.Net;
using System.Text;
using dy.net.model.dto;
using dy.net.model.entity;
using dy.net.service;
using dy.net.Tests.TestInfrastructure;
using dy.net.utils;
using Microsoft.AspNetCore.DataProtection;
using Newtonsoft.Json.Linq;
using SqlSugar;

namespace dy.net.Tests;

public class DouyinLiveStatusTests
{
    [Fact]
    public void Parser_ExtractsLiveRoomFromStringRoomData()
    {
        var roomData = JToken.FromObject("{\"status\":2,\"id_str\":\"room-1\",\"web_rid\":\"web-1\",\"title\":\"测试直播\",\"start_time\":1700000000}");

        var result = DouyinLiveStatusParser.Parse(1, null, null, roomData);

        Assert.Equal(DouyinLiveStatusState.Live, result.Status);
        Assert.Equal("room-1", result.RoomId);
        Assert.Equal("web-1", result.WebRid);
        Assert.Equal("测试直播", result.Title);
        Assert.NotNull(result.StartedAt);
    }

    [Fact]
    public void Parser_DoesNotTreatMissingStatusAsOffline()
    {
        var result = DouyinLiveStatusParser.Parse(null, null, null, null);

        Assert.Equal(DouyinLiveStatusState.Unknown, result.Status);
    }

    [Fact]
    public async Task Client_SignsProfileRequestAndParsesLiveState()
    {
        var handler = new LiveProfileResponseHandler();
        using var factory = new StubHttpClientFactory(handler, "https://www.douyin.com");
        var client = new DouyinLiveStatusClient(factory);

        var result = await client.ProbeAsync("sec-user-1", "msToken=token-value; UIFID=ui-value");

        Assert.Equal(DouyinLiveStatusState.Live, result.Status);
        Assert.Equal("web-live-1", result.WebRid);
        Assert.NotNull(handler.Request);
        Assert.Equal("/aweme/v1/web/user/profile/other/", handler.Request.RequestUri.AbsolutePath);
        Assert.Contains("sec_user_id=sec-user-1", handler.Request.RequestUri.Query);
        Assert.Contains("a_bogus=", handler.Request.RequestUri.Query);
        Assert.Equal("msToken=token-value; UIFID=ui-value", handler.Cookie);
        Assert.Equal("https://www.douyin.com/user/sec-user-1", handler.Request.Headers.Referrer?.ToString());
    }

    [Fact]
    public async Task Monitor_SendsOnlyOncePerLiveRoomAndRearmsAfterOffline()
    {
        using var temporary = new TemporaryDirectory();
        using var db = CreateDatabase(Path.Combine(temporary.Path, "live.sqlite"));
        db.CodeFirst.InitTables<DouyinCookie, DouyinFollowed, EmailNotificationSettings>();
        db.Insertable(new DouyinCookie
        {
            Id = "cookie-1", MyUserId = "my-user-1", UserName = "账号",
            Cookies = "msToken=value", Status = 1, StatusCode = 0
        }).ExecuteCommand();
        db.Insertable(new DouyinFollowed
        {
            Id = "follow-1", mySelfId = "my-user-1", SecUid = "sec-1", UperName = "测试博主",
            UperId = "uid-1", LastSyncTime = DateTime.UtcNow
        }).ExecuteCommand();
        db.Insertable(new EmailNotificationSettings
        {
            Id = "default", Enabled = true, Host = "smtp.test", Port = 465,
            FromAddress = "from@example.test", Recipients = "to@example.test"
        }).ExecuteCommand();

        var liveClient = new FakeLiveStatusClient
        {
            Result = new DouyinLiveStatusProbe
            {
                Status = DouyinLiveStatusState.Live, RoomId = "room-1", WebRid = "web-1", Title = "第一场"
            }
        };
        var emailSender = new FakeEmailSender();
        var settings = new EmailNotificationSettingsService(db, new EphemeralDataProtectionProvider(), emailSender);
        var service = new DouyinLiveStatusService(
            db,
            liveClient,
            new LiveEmailNotificationService(settings, emailSender));

        var enabled = await service.SetMonitorAsync(new FollowLiveMonitorUpdateDto { Id = "follow-1", Enabled = true });
        Assert.Equal(DouyinLiveStatusState.Live, enabled.LiveStatus);
        await service.SetEmailNotificationAsync(new FollowLiveEmailUpdateDto { Id = "follow-1", Enabled = true });
        Assert.Equal(1, emailSender.SendCount);

        await MakeDueAsync(db, "follow-1");
        await service.RefreshDueAsync();
        Assert.Equal(1, emailSender.SendCount);

        liveClient.Result = new DouyinLiveStatusProbe { Status = DouyinLiveStatusState.Offline };
        await MakeDueAsync(db, "follow-1");
        await service.RefreshDueAsync();

        liveClient.Result = new DouyinLiveStatusProbe
        {
            Status = DouyinLiveStatusState.Live, RoomId = "room-2", WebRid = "web-2", Title = "第二场"
        };
        await MakeDueAsync(db, "follow-1");
        await service.RefreshDueAsync();

        Assert.Equal(2, emailSender.SendCount);
        var follow = await db.Queryable<DouyinFollowed>().InSingleAsync("follow-1");
        Assert.Equal("web:web-2", follow.LastLiveNotificationKey);
        Assert.Null(follow.LastLiveNotificationError);
    }

    [Fact]
    public async Task EmailFailure_DoesNotChangeSuccessfulLiveState()
    {
        using var temporary = new TemporaryDirectory();
        using var db = CreateDatabase(Path.Combine(temporary.Path, "mail-failure.sqlite"));
        db.CodeFirst.InitTables<DouyinCookie, DouyinFollowed, EmailNotificationSettings>();
        db.Insertable(new DouyinCookie
        {
            Id = "cookie-1", MyUserId = "my-user-1", UserName = "账号",
            Cookies = "msToken=value", Status = 1, StatusCode = 0
        }).ExecuteCommand();
        db.Insertable(new DouyinFollowed
        {
            Id = "follow-1", mySelfId = "my-user-1", SecUid = "sec-1", UperName = "测试博主",
            UperId = "uid-1", LastSyncTime = DateTime.UtcNow, LiveMonitorEnabled = true,
            LiveEmailNotificationEnabled = true
        }).ExecuteCommand();
        db.Insertable(new EmailNotificationSettings
        {
            Id = "default", Enabled = true, Host = "smtp.test", Port = 465,
            FromAddress = "from@example.test", Recipients = "to@example.test"
        }).ExecuteCommand();
        var sender = new FakeEmailSender { Error = new IOException("smtp unavailable") };
        var settings = new EmailNotificationSettingsService(db, new EphemeralDataProtectionProvider(), sender);
        var service = new DouyinLiveStatusService(
            db,
            new FakeLiveStatusClient
            {
                Result = new DouyinLiveStatusProbe { Status = DouyinLiveStatusState.Live, WebRid = "web-1" }
            },
            new LiveEmailNotificationService(settings, sender));

        await service.RefreshDueAsync();

        var follow = await db.Queryable<DouyinFollowed>().InSingleAsync("follow-1");
        Assert.Equal(DouyinLiveStatusState.Live, follow.LiveStatus);
        Assert.Null(follow.LiveCheckError);
        Assert.Contains("smtp unavailable", follow.LastLiveNotificationError);
    }

    [Fact]
    public async Task EmailSettings_EncryptsStoredPassword()
    {
        using var temporary = new TemporaryDirectory();
        using var db = CreateDatabase(Path.Combine(temporary.Path, "email-settings.sqlite"));
        db.CodeFirst.InitTables<EmailNotificationSettings>();
        var service = new EmailNotificationSettingsService(
            db,
            new EphemeralDataProtectionProvider(),
            new FakeEmailSender());

        var dto = await service.SaveAsync(new EmailNotificationSettingsDto
        {
            Enabled = true,
            Host = "smtp.example.test",
            Port = 465,
            SecurityMode = EmailSecurityMode.SslOnConnect,
            UserName = "sender@example.test",
            Password = "secret-auth-code",
            FromAddress = "sender@example.test",
            FromName = "dysync",
            Recipients = "one@example.test;two@example.test"
        });

        var stored = await db.Queryable<EmailNotificationSettings>().InSingleAsync("default");
        Assert.True(dto.HasPassword);
        Assert.NotEqual("secret-auth-code", stored.ProtectedPassword);
        Assert.Equal("secret-auth-code", await service.GetPasswordAsync(stored));
        Assert.Equal("one@example.test;two@example.test", stored.Recipients);
    }

    [Fact]
    public async Task ForbiddenResponse_KeepsLastStateAndStartsAccountCooldown()
    {
        using var temporary = new TemporaryDirectory();
        using var db = CreateDatabase(Path.Combine(temporary.Path, "cooldown.sqlite"));
        db.CodeFirst.InitTables<DouyinCookie, DouyinFollowed, EmailNotificationSettings>();
        db.Insertable(new DouyinCookie
        {
            Id = "cookie-1", MyUserId = "my-user-1", UserName = "账号",
            Cookies = "msToken=value", Status = 1, StatusCode = 0
        }).ExecuteCommand();
        db.Insertable(new DouyinFollowed
        {
            Id = "follow-1", mySelfId = "my-user-1", SecUid = "sec-1", UperName = "测试博主",
            UperId = "uid-1", LastSyncTime = DateTime.UtcNow, LiveMonitorEnabled = true,
            LiveStatus = DouyinLiveStatusState.Live, LiveWebRid = "existing-room",
            LiveStatusUpdatedAt = DateTime.UtcNow.AddMinutes(-6)
        }).ExecuteCommand();
        var liveClient = new FakeLiveStatusClient
        {
            Error = new DouyinLiveStatusRequestException(
                "抖音直播状态请求失败（HTTP 403）",
                HttpStatusCode.Forbidden,
                requiresAccountCooldown: true)
        };
        var sender = new FakeEmailSender();
        var settings = new EmailNotificationSettingsService(db, new EphemeralDataProtectionProvider(), sender);
        var service = new DouyinLiveStatusService(db, liveClient, new LiveEmailNotificationService(settings, sender));

        await service.RefreshDueAsync();

        var follow = await db.Queryable<DouyinFollowed>().InSingleAsync("follow-1");
        var cookie = await db.Queryable<DouyinCookie>().InSingleAsync("cookie-1");
        Assert.Equal(DouyinLiveStatusState.Live, follow.LiveStatus);
        Assert.Equal("existing-room", follow.LiveWebRid);
        Assert.Contains("HTTP 403", follow.LiveCheckError);
        Assert.True(cookie.LiveCheckCooldownUntil > DateTime.UtcNow);
        Assert.Equal(1, cookie.ConsecutiveLiveCheckFailures);
    }

    private static async Task MakeDueAsync(ISqlSugarClient db, string id)
    {
        var follow = await db.Queryable<DouyinFollowed>().InSingleAsync(id);
        follow.LiveCheckedAt = DateTime.UtcNow.AddMinutes(-6);
        await db.Updateable(follow).UpdateColumns(x => x.LiveCheckedAt).ExecuteCommandAsync();
    }

    private static SqlSugarClient CreateDatabase(string path) => new(new ConnectionConfig
    {
        ConnectionString = $"Data Source={path}",
        DbType = DbType.Sqlite,
        IsAutoCloseConnection = true,
        InitKeyType = InitKeyType.Attribute
    });

    private sealed class FakeLiveStatusClient : IDouyinLiveStatusClient
    {
        public DouyinLiveStatusProbe Result { get; set; }
        public Exception Error { get; set; }
        public int Calls { get; private set; }

        public Task<DouyinLiveStatusProbe> ProbeAsync(string secUid, string cookie, CancellationToken cancellationToken = default)
        {
            Calls++;
            if (Error != null) throw Error;
            return Task.FromResult(Result);
        }
    }

    private sealed class FakeEmailSender : IEmailNotificationSender
    {
        public int SendCount { get; private set; }
        public Exception Error { get; set; }

        public Task SendAsync(
            EmailNotificationSettings settings,
            string password,
            string subject,
            string htmlBody,
            CancellationToken cancellationToken = default)
        {
            SendCount++;
            if (Error != null) throw Error;
            return Task.CompletedTask;
        }
    }

    private sealed class LiveProfileResponseHandler : HttpMessageHandler
    {
        public HttpRequestMessage Request { get; private set; }
        public string Cookie { get; private set; }

        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            Request = request;
            Cookie = request.Headers.GetValues("Cookie").Single();
            const string json = "{\"status_code\":0,\"user\":{\"live_status\":1,\"room_id_str\":\"room-live-1\",\"room_data\":\"{\\\"status\\\":2,\\\"web_rid\\\":\\\"web-live-1\\\",\\\"title\\\":\\\"正在直播\\\"}\"}}";
            return Task.FromResult(new HttpResponseMessage(HttpStatusCode.OK)
            {
                Content = new StringContent(json, Encoding.UTF8, "application/json")
            });
        }
    }
}