using ClawdDotNet.App.Services;
using Shouldly;

namespace ClawdDotNet.App.Tests.Services;

/// <summary>
/// #794: The Telegram client login through the WebUI — the question waits for the answer,
/// and an answer without a question goes nowhere.
/// </summary>
public sealed class TelegramLoginBrokerTests
{
    [Fact]
    public async Task The_code_from_the_web_reaches_the_waiting_login()
    {
        var broker = new TelegramLoginBroker(configured: true);

        var waiting = broker.AskForCodeAsync("code?");
        broker.Status.State.ShouldBe(TelegramLoginState.NeedsCode);

        broker.Answer(" 12345 ").Ok.ShouldBeTrue();

        (await waiting).ShouldBe("12345");
        broker.Status.State.ShouldBe(TelegramLoginState.Connecting);
    }

    [Fact]
    public void An_answer_without_a_question_is_refused()
    {
        var broker = new TelegramLoginBroker(configured: true);

        broker.Answer("12345").Ok.ShouldBeFalse();
    }

    [Fact]
    public async Task An_answer_is_used_once()
    {
        var broker = new TelegramLoginBroker(configured: true);
        var waiting = broker.AskForPasswordAsync();

        broker.Answer("secret").Ok.ShouldBeTrue();
        broker.Answer("again").Ok.ShouldBeFalse();
        (await waiting).ShouldBe("secret");
    }

    [Fact]
    public void The_status_never_carries_the_answer()
    {
        var broker = new TelegramLoginBroker(configured: true);
        _ = broker.AskForPasswordAsync();

        broker.Answer("hunter2");

        broker.Status.Message.ShouldNotContain("hunter2");
    }

    [Fact]
    public async Task A_new_question_cancels_an_unanswered_one()
    {
        var broker = new TelegramLoginBroker(configured: true);
        var first = broker.AskForCodeAsync("code?");
        var second = broker.AskForCodeAsync("code again?");

        await Should.ThrowAsync<TaskCanceledException>(first);
        broker.Answer("777").Ok.ShouldBeTrue();
        (await second).ShouldBe("777");
    }

    [Fact]
    public void Without_a_client_the_state_says_so()
        => new TelegramLoginBroker(configured: false).Status.State.ShouldBe(TelegramLoginState.NotConfigured);
}