using FluentAssertions;
using Microsoft.Extensions.Options;
using NovelSoftware.Application;
using NovelSoftware.Application.Agent;
using NovelSoftware.Infrastructure.Anthropic;

namespace NovelSoftware.Tests;

public class AnthropicClientTests
{
    [Fact]
    public void Constructing_without_a_key_does_not_throw()
    {
        // The agent service takes this as a dependency and also serves read-only endpoints
        // (listing conversations, reading a transcript). Throwing at construction would
        // take those down on any install that has not configured a key yet.
        var construct = () => new AnthropicAgentModelClient(Options.Create(new AgentOptions()));

        construct.Should().NotThrow();
    }

    [Fact]
    public async Task Sending_without_a_key_reports_a_configuration_problem()
    {
        var previous = Environment.GetEnvironmentVariable("ANTHROPIC_API_KEY");
        Environment.SetEnvironmentVariable("ANTHROPIC_API_KEY", null);

        try
        {
            var client = new AnthropicAgentModelClient(Options.Create(new AgentOptions()));

            var send = async () => await client.CompleteAsync("system", [], []);

            (await send.Should().ThrowAsync<AgentNotConfiguredException>())
                .WithMessage("*ANTHROPIC_API_KEY*");
        }
        finally
        {
            Environment.SetEnvironmentVariable("ANTHROPIC_API_KEY", previous);
        }
    }
}