using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using Luna.Configuration;
using Luna.Configuration.Extensions;

namespace Luna.Channels.Tests;

[TestFixture]
[Category("Unit")]
public class TelegramOptionsTests
{
    [Test]
    public void BotToken_Binds_From_Configuration()
    {
        var config = new ConfigurationBuilder()
            .AddInMemoryCollection(new Dictionary<string, string?>
            {
                ["Channels:Telegram:BotToken"] = "test-token"
            })
            .Build();

        var services = new ServiceCollection();
        services.AddSingleton<IConfiguration>(config);
        services.AddTelegramOptions();

        var provider = services.BuildServiceProvider();
        var options = provider.GetRequiredService<IOptions<TelegramOptions>>().Value;

        Assert.That(options.BotToken, Is.EqualTo("test-token"));
    }

    [Test]
    public void Validation_Fails_When_BotToken_Missing()
    {
        var config = new ConfigurationBuilder().Build();

        var services = new ServiceCollection();
        services.AddSingleton<IConfiguration>(config);
        services.AddTelegramOptions();

        var provider = services.BuildServiceProvider();

        Assert.That(
            () => provider.GetRequiredService<IOptions<TelegramOptions>>().Value,
            Throws.InstanceOf<OptionsValidationException>());
    }

    [Test]
    public void PollingTimeoutSeconds_Defaults_To_30()
    {
        var options = new TelegramOptions { BotToken = "x" };

        Assert.That(options.PollingTimeoutSeconds, Is.EqualTo(30));
    }

    [Test]
    public void AllowedUserIds_Defaults_To_Empty()
    {
        var options = new TelegramOptions { BotToken = "x" };

        Assert.That(options.AllowedUserIds, Is.Empty);
    }
}