package main

import (
	"context"
	"log/slog"
	"testing"

	"codeberg.org/eventsourced/eventsourced"
	goamqp "codeberg.org/messaging/go-messaging-amqp"
	spec "codeberg.org/messaging/messaging"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"gitea.unbound.se/unboundsoftware/schemas/cache"
	"gitea.unbound.se/unboundsoftware/schemas/domain"
)

// ownKeys is a literal list on purpose: deriving it from the code would keep a renamed key green.
var ownKeys = []string{
	"SubGraph.Updated",
	"Organization.Added",
	"Organization.UserAdded",
	"Organization.APIKeyAdded",
	"Organization.APIKeyRemoved",
	"Organization.Removed",
}

func Test_amqpSetups(t *testing.T) {
	setups := amqpSetups(slog.Default(), make(chan error, 1), goamqp.NewPublisher(), cache.New(slog.Default()))
	topology, err := goamqp.CollectTopology(serviceName, setups...)
	require.NoError(t, err)

	var consumed, publishesTo []string
	for _, e := range topology.Endpoints {
		switch e.Direction {
		case spec.DirectionConsume:
			assert.True(t, e.Ephemeral, "cache consumers must be transient, %s is durable", e.QueueName)
			consumed = append(consumed, e.RoutingKey)
		case spec.DirectionPublish:
			publishesTo = append(publishesTo, e.ExchangeName)
		}
	}
	assert.ElementsMatch(t, ownKeys, consumed)
	assert.Equal(t, []string{"events.topic.exchange"}, publishesTo)
}

type recordingPublisher struct {
	keys []string
	ctxs []context.Context
}

func (r *recordingPublisher) Publish(ctx context.Context, routingKey string, _ any, _ ...goamqp.Header) error {
	r.keys = append(r.keys, routingKey)
	r.ctxs = append(r.ctxs, ctx)
	return nil
}

func Test_newEventPublisher(t *testing.T) {
	rec := &recordingPublisher{}
	p, err := newEventPublisher(rec)
	require.NoError(t, err)

	for _, e := range []eventsourced.Event{
		&domain.SubGraphUpdated{},
		&domain.OrganizationAdded{},
		&domain.UserAddedToOrganization{},
		&domain.APIKeyAdded{},
		&domain.APIKeyRemoved{},
		&domain.OrganizationRemoved{},
	} {
		require.NoError(t, p.Publish(context.Background(), e))
	}
	assert.Equal(t, ownKeys, rec.keys, "published keys must match what the cache consumers bind")
}

func Test_uncancelledPublisher(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	cancel()
	rec := &recordingPublisher{}
	p, err := newEventPublisher(uncancelledPublisher{rec})
	require.NoError(t, err)

	require.NoError(t, p.Publish(ctx, &domain.OrganizationAdded{}))
	assert.NoError(t, rec.ctxs[0].Err(), "publish must not see the request's cancellation")
}