package link

import (
	"context"
	"testing"
	"time"
)

// A health event is kept as the machine its subject names says it, whatever its body claims, and taken
// (novox/hq ADR 0240): core NATS, nothing to hold.

type keptHealths struct{ by map[string]Health }

func (k *keptHealths) Stated(_ context.Context, node string, h Health) error {
	k.by[node] = h
	return nil
}

func TestAHealthEventIsKeptAsTheMachineInItsSubject(t *testing.T) {
	s, in := serving()
	kept := &keptHealths{by: map[string]Health{}}
	s.Hears(kept)
	to := &settled{}
	m := in.sends(t, to, KindHealth, HealthSaid{Node: "laptop", Health: Health{Contract: LivenessContract, At: time.Now(),
		Resources: []ResourceHealth{{Module: "letta", Resource: "letta.server", State: StateUnhealthy}}}}).(*fakeControl)
	m.subject = HealthSubject("anchor")
	s.act(t.Context(), m)
	if !to.acked {
		t.Fatal("a health event was not taken")
	}
	if _, lied := kept.by["laptop"]; lied || len(kept.by["anchor"].Resources) != 1 {
		t.Fatalf("kept %+v: the machine is the subject's, never the body's", kept.by)
	}
	if kind, ok := kindOfSubject(HealthSubject("anchor")); !ok || kind != KindHealth {
		t.Fatalf("%s is not read as a health statement", HealthSubject("anchor"))
	}
}