using Big.Application;
using Big.Domain;

namespace Big.Tests;

// S-10a (#102): the "documents received" use case. A zorgprofessional supplies the documents their
// registration is waiting for; the handler completes the WachtOpDocumenten task via the Workflow Client
// so the process leaves the 30-day wait and continues to beoordeling. Owner-scoped by the caller's bsn,
// like WithdrawRegistration. (The real file upload + ZGW storage is S-10b; this is the trigger path.)
public class ProvideDocumentsTests
{
    private const string Bsn = "123456782";

    private static Registration Submitted(string processInstanceId = "proc-1")
    {
        var registration = Registration.Submit(Bsn);
        registration.RecordProcessStarted(processInstanceId);
        return registration;
    }

    private static ProvideDocumentsCommand Command(RegistrationId id, string bsn = Bsn) => new(id, bsn);

    [Fact]
    public async Task Providing_documents_completes_the_document_wait()
    {
        var store = new FakeRegistrationStore();
        var registration = Submitted("proc-42");
        store.Seed(registration);
        var workflow = new FakeWorkflowClient();
        var handler = new ProvideDocuments(store, workflow);

        var outcome = await handler.HandleAsync(Command(registration.Id));

        Assert.Equal(ProvideDocumentsOutcome.Accepted, outcome);
        Assert.Equal("proc-42", workflow.CompletedDocumentWaitFor);
    }

    [Fact]
    public async Task A_different_bsn_cannot_provide_documents()
    {
        // Owner-scoping: only the registration's own bsn may supply its documents. Another bsn is told
        // NotFound (existence not revealed) and the wait is not completed.
        var store = new FakeRegistrationStore();
        var registration = Submitted();
        store.Seed(registration);
        var workflow = new FakeWorkflowClient();
        var handler = new ProvideDocuments(store, workflow);

        var outcome = await handler.HandleAsync(Command(registration.Id, bsn: "999999990"));

        Assert.Equal(ProvideDocumentsOutcome.NotFound, outcome);
        Assert.Null(workflow.CompletedDocumentWaitFor);
    }

    [Fact]
    public async Task Providing_for_an_unknown_registration_is_not_found()
    {
        var store = new FakeRegistrationStore();
        var handler = new ProvideDocuments(store, new FakeWorkflowClient());

        Assert.Equal(ProvideDocumentsOutcome.NotFound, await handler.HandleAsync(Command(RegistrationId.New())));
    }

    [Fact]
    public async Task Providing_before_a_process_started_is_accepted_without_calling_the_workflow()
    {
        // No process yet → no wait task to complete; the request still stands (best-effort, mirroring
        // WithdrawRegistration) and the Workflow Client is not called.
        var store = new FakeRegistrationStore();
        var registration = Registration.Submit(Bsn); // no RecordProcessStarted
        store.Seed(registration);
        var workflow = new FakeWorkflowClient();
        var handler = new ProvideDocuments(store, workflow);

        var outcome = await handler.HandleAsync(Command(registration.Id));

        Assert.Equal(ProvideDocumentsOutcome.Accepted, outcome);
        Assert.Null(workflow.CompletedDocumentWaitFor);
    }

    [Fact]
    public async Task Rejects_a_null_command()
        => await Assert.ThrowsAsync<ArgumentNullException>(() =>
            new ProvideDocuments(new FakeRegistrationStore(), new FakeWorkflowClient()).HandleAsync(null!));
}