using Deal.Api.Telegram;
using Deal.Contracts.Integrations.Models;
using Deal.Modules.Settings.Application.Models;
using Deal.Modules.Telegram.Application;
using Deal.Modules.Telegram.Application.Models;
using Deal.Tests.Unit.Contracts;
using Deal.Tests.Unit.Modules.Settings;
using Deal.Tests.Unit.Support;
using Grpc.Core;
using Microsoft.Extensions.Logging.Abstractions;

namespace Deal.Tests.Unit.Api;

/// <summary>
/// Тесты сборки статуса вкладки Telegram — GET /api/tg/status.
/// </summary>
public sealed class TgStatusServiceTests
{
    /// <summary>
    /// Гейт по умолчанию
    /// </summary>
    [Fact]
    public async Task GetAsync_GatewayIdleAndEmptyTenant_ReturnsIdleForm()
    {
        (TgStatusService service, _, _, _, _, _) = Create();

        TgStatusDto status = await service.GetAsync(CancellationToken.None);

        Assert.Equal("idle", status.Phase);
        Assert.False(status.Connected);
        Assert.False(status.Listener);
        Assert.Equal(string.Empty, status.Account);
        Assert.Equal(0, status.Monitored);
        Assert.False(status.KeysSet);
        Assert.Null(status.Error);
        Assert.Null(status.QrUrl);
    }

    /// <summary>
    /// Сервис недоступен
    /// </summary>
    [Fact]
    public async Task GetAsync_GatewayUnavailable_ReturnsIdleFormWithKvAccountCountAndKeys()
    {
        (TgStatusService service, FakeTelegramStore store, FakeSettingsStore settings, FakeTelegramGateway gateway, _, FakeGlobalSettingsStore globalSettings) = Create();
        store.Seed(Dialog("d_1", "Канал", "channel", Monitor: true));
        store.Seed(Dialog("d_2", "Группа", "group", Monitor: true));
        store.Seed(Dialog("d_off", "Выключен", "channel", Monitor: false));
        settings.Preload(SettingsKeys.TgAccount, "\"@user\"");
        PreloadKeys(globalSettings, "123456", "abcdefghijklmnop");
        gateway.StatusFailure = new RpcException(new Status(StatusCode.Unavailable, "Telegram не подключён"));

        TgStatusDto status = await service.GetAsync(CancellationToken.None);

        Assert.Equal("idle", status.Phase);
        Assert.False(status.Connected);
        Assert.False(status.Listener);
        Assert.Equal("@user", status.Account);
        Assert.Equal(2, status.Monitored);
        Assert.True(status.KeysSet);
        Assert.Null(status.Error);
        Assert.Null(status.QrUrl);
    }

    /// <summary>
    /// Готовый аккаунт
    /// </summary>
    [Fact]
    public async Task GetAsync_ReadyGateway_ComposesLiveFieldsWithKvAccountMonitoredAndKeys()
    {
        (TgStatusService service, FakeTelegramStore store, FakeSettingsStore settings, FakeTelegramGateway gateway, _, FakeGlobalSettingsStore globalSettings) = Create();
        store.Seed(Dialog("d_1", "Канал", "channel", Monitor: true));
        settings.Preload(SettingsKeys.TgAccount, "\"@realuser\"");
        PreloadKeys(globalSettings, "123456", "abcdefghijklmnop");
        gateway.Status = new TelegramAccountStatusDto(
            Phase: "ready", Connected: true, Listener: true, Account: "gateway-account", Error: null, QrUrl: null);

        TgStatusDto status = await service.GetAsync(CancellationToken.None);

        Assert.Equal("ready", status.Phase);
        Assert.True(status.Connected);
        Assert.True(status.Listener);
        Assert.Equal("@realuser", status.Account); // KV tgAccount перекрывает справочное поле гейта (Ruling 8)
        Assert.Equal(1, status.Monitored);
        Assert.True(status.KeysSet);
    }

    /// <summary>
    /// Фаза qr несёт qrUrl из гейта
    /// </summary>
    [Fact]
    public async Task GetAsync_QrPhase_ReturnsQrUrlFromGateway()
    {
        (TgStatusService service, _, _, FakeTelegramGateway gateway, _, _) = Create();
        gateway.Status = new TelegramAccountStatusDto(
            Phase: "qr", Connected: false, Listener: false, Account: string.Empty, Error: null, QrUrl: "https://t.me/qr/test");

        TgStatusDto status = await service.GetAsync(CancellationToken.None);

        Assert.Equal("qr", status.Phase);
        Assert.Equal("https://t.me/qr/test", status.QrUrl);
        Assert.False(status.Connected);
    }

    // ─── Хелперы ────────────────────────────────────────────────────────────

    // Собирает сервис на фейках (FakeTelegramGateway/Store/SettingsStore/GlobalSettingsStore + FakeSecretCipher).
    private static (TgStatusService Service, FakeTelegramStore Store, FakeSettingsStore Settings, FakeTelegramGateway Gateway, FakeSecretCipher Cipher, FakeGlobalSettingsStore GlobalSettings) Create()
    {
        var store = new FakeTelegramStore();
        var settings = new FakeSettingsStore();
        var gateway = new FakeTelegramGateway();
        var cipher = new FakeSecretCipher();
        var globalSettings = new FakeGlobalSettingsStore();
        var keys = new TelegramKeysService(globalSettings, cipher);
        var dialogs = new DialogsService(store, settings, gateway, NullLogger<DialogsService>.Instance);
        var service = new TgStatusService(gateway, dialogs, settings, keys);
        return (service, store, settings, gateway, cipher, globalSettings);
    }

    // Кладёт глобальную настройку telegramKeys (apiHash шифруется — enc: через шифр сценария).
    // settings: Глобальное KV-хранилище сценария.
    // apiId: apiId приложения (5..9 цифр).
    // apiHash: Открытый api_hash (ядро шифрует при сохранении).
    private static void PreloadKeys(
        FakeGlobalSettingsStore settings,
        string apiId,
        string apiHash)
    {
        string encrypted = new FakeSecretCipher().Encrypt(apiHash);
        settings.Preload(GlobalSettingsKeys.TelegramKeys, $"{{\"apiId\":\"{apiId}\",\"apiHash\":\"{encrypted}\"}}");
    }

    // Строка каталога минимально (id/имя/kind + флаг мониторинга).
    private static FakeTelegramDialogRow Dialog(
        string id,
        string name,
        string kind,
        bool Monitor)
        => new(id, name, Handle: string.Empty, kind, Hue: "#666", Monitor, LastText: string.Empty, LastAt: null, Backfilled: false, UpdatedAt: DateTimeOffset.UtcNow);
}