package bus

import (
	"strings"
	"testing"

	"git.novox.be/novox/mesh-sdk/go/buscalls"
)

// novox/hq ADR 0363 §2, §3: an event goes to the stream whose pattern carries it, as the bus matches subjects.
func TestAnEventFallsUnderAStreamsPatternAsTheBusMatchesIt(t *testing.T) {
	for _, c := range []struct {
		pattern, event string
		want           bool
	}{
		{"mail.*.message.added", "mail.home.message.added", true},
		{"mail.*.message.added", "mail.home.message.removed", false},
		{"mail.*.message.added", "mail.home.work.message.added", false},
		{"mail.>", "mail.home.message.added", true},
		{"mail.**", "mail.home", true},
		{"mail.>", "mail", false},
		{"status", "status", true},
		{"status", "status.changed", false},
		{"", "status", false},
	} {
		if got := eventMatches(c.pattern, c.event); got != c.want {
			t.Errorf("%q under %q: %v, want %v", c.event, c.pattern, got, c.want)
		}
	}
	// Design 47 G §347, §59, §462: a sent object is read by the reference that carried it, from a sender's sent store only; a
	// state's objects, and a reference that is none are refused before the bus is asked.
	t.Run("SentGetRefusesWhatIsNoSentObjectsReference", func(t *testing.T) {
		digest := "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
		for _, c := range []struct {
			name string
			req  buscalls.ObjectsSentGetRequest
			want string
		}{
			{"no digest", buscalls.ObjectsSentGetRequest{Store: "m_sent-objects", Object: "o", Size: 3}, "named by the reference"},
			{"a state's objects", buscalls.ObjectsSentGetRequest{Store: "m_asks-objects", Object: "o", Size: 3, Digest: digest}, "no sent store"},
		} {
			_, err := (&Conn{}).SentGet(c.req)
			if err == nil || !strings.Contains(err.Error(), c.want) {
				t.Errorf("%s: got %v, want an error containing %q", c.name, err, c.want)
			}
		}
	})
}

// A membership naming no stream publishes every event on EVENTS, exactly as before (issue 725).
func TestAnEventNoStreamCarriesIsPublishedOnEvents(t *testing.T) {
	mail := &Membership{Module: "mail", Streams: []StreamIssued{{Stream: "MAIL", Events: []string{"mail.*.message.added"},
		Subject: "mesh.stream.mail.event.{event}"}}}
	for _, c := range []struct {
		m     *Membership
		event string
		want  string
	}{
		{nil, "mail.home.message.added", "mesh.mod.mail.event.mail.home.message.added"},
		{&Membership{Module: "mail"}, "mail.home.message.added", "mesh.mod.mail.event.mail.home.message.added"},
		{mail, "mail.home.message.added", "mesh.stream.mail.event.mail.home.message.added"},
		{mail, "status", "mesh.mod.mail.event.status"},
	} {
		if got := eventSubject(c.m, "mail", c.event); got != c.want {
			t.Errorf("%s: %s, want %s", c.event, got, c.want)
		}
	}
	if got := keyOf("mesh.stream.mail.event.mail.home.message.added"); got != "mail.mail.home.message.added" {
		t.Errorf("a stream's event reaches its consumer as %q, not as on EVENTS", got)
	}
}