//go:build integration

package broker

import (
	"context"
	"slices"
	"testing"
	"time"

	"github.com/nats-io/nats.go/jetstream"
)

func TestALogIsAssertedInPlaceAndNeverRemoved(t *testing.T) {
	bus := aLiveBus(t)
	l := Log{Module: "logtest", Name: "changes", MaxMiB: 1}
	if _, err := RaiseLogs(bus, []Log{l}); err != nil {
		t.Fatalf("a real server refused a module's log: %v", err)
	}
	js, err := jetstream.New(bus.Conn())
	if err != nil {
		t.Fatal(err)
	}
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	ack, err := js.Publish(ctx, l.Subject()+".7", []byte(`{"op":"opened"}`))
	if err != nil {
		t.Fatalf("an append to the log was refused: %v", err)
	}
	stream, err := js.Stream(ctx, l.Stream())
	if err != nil {
		t.Fatal(err)
	}
	have := stream.CachedInfo().Config
	want := l.Config()
	if have.Storage != want.Storage || have.Retention != want.Retention || have.MaxAge != 0 ||
		have.MaxMsgsPerSubject != -1 || have.MaxBytes != want.MaxBytes || have.MaxMsgSize != want.MaxMsgSize ||
		have.Discard != jetstream.DiscardNew || !have.AllowDirect || !have.DenyDelete || !have.DenyPurge ||
		have.Replicas != 1 || !slices.Equal(have.Subjects, want.Subjects) {
		t.Fatalf("the server holds the log as %+v", have)
	}
	if err := stream.DeleteMsg(ctx, ack.Sequence); err == nil {
		t.Fatal("an entry was deleted from a log")
	}
	l.MaxMiB = 2
	if _, err := RaiseLogs(bus, []Log{l}); err != nil {
		t.Fatalf("asserting the log again failed, so a restart would: %v", err)
	}
	info, err := stream.Info(ctx)
	if err != nil {
		t.Fatal(err)
	}
	if info.Config.MaxBytes != 2*1024*1024 {
		t.Fatalf("the changed cap was not brought to match: %d", info.Config.MaxBytes)
	}
	if info.State.Msgs < 1 {
		t.Fatal("asserting the log again lost what it held")
	}
	undeclared, err := RaiseLogs(bus, nil)
	if err != nil {
		t.Fatal(err)
	}
	if !slices.Contains(undeclared, l.Stream()) {
		t.Fatalf("a log nothing declares was not reported: %v", undeclared)
	}
	if _, err := js.Stream(ctx, l.Stream()); err != nil {
		t.Fatalf("a log nothing declares is gone: %v", err)
	}
}