package link

import (
	"context"
	"encoding/json"
	"strings"
	"testing"
	"time"

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

	"github.com/novox/mesh-controller/internal/broker"
	"github.com/novox/mesh-controller/internal/testbus"
)

// A mesh seat's verb asked in the caller's own name goes on the subject that names its caller (novox/hq issue
// 365), so the holder knows who asks from the subject alone: how the vault takes a value from the controller
// and nobody else (design 57's V2, issue 675).
func TestAMeshSeatsVerbIsAskedInTheCallersOwnName(t *testing.T) {
	conn, err := nats.Connect(testbus.URL(t))
	if err != nil {
		t.Fatal(err)
	}
	defer conn.Close()
	heard := make(chan string, 1)
	sub, err := conn.Subscribe(broker.CalledPattern(SeatToolSubject("mesh-vault", "accept")), func(m *nats.Msg) {
		heard <- m.Subject
		raw, _ := json.Marshal(Answer{Result: json.RawMessage(`{"call":"c1"}`)})
		_ = m.Respond(raw)
	})
	if err != nil {
		t.Fatal(err)
	}
	defer sub.Unsubscribe()
	answer, err := AskMeshSeatToolAs(context.Background(), conn, broker.ControllerName, "mesh-vault", "accept",
		map[string]any{"provider": "novox", "provision": "postgres"}, 5*time.Second)
	if err != nil || string(answer.Result) != `{"call":"c1"}` {
		t.Fatalf("%+v %v", answer, err)
	}
	subject := <-heard
	if subject != "mesh.seat.mesh-vault.call.accept.controller" || !strings.HasSuffix(subject, "."+broker.ControllerName) {
		t.Errorf("asked on %s", subject)
	}
	if _, err := AskMeshSeatToolAs(context.Background(), conn, "not a user!", "mesh-vault", "accept", nil, time.Second); err == nil {
		t.Error("a caller that is no bus user was asked in")
	}
}