package lease

import (
	"testing"
	"time"
)

// The host's judgement of a new controller, held here as the host holds it (mesh-host internal/witness):
// the lease held by a controller on this machine, taken since the new build started, and fresh.
func TestTheWitnessJudgesANewControllerByTheLease(t *testing.T) {
	started := time.Date(2026, 10, 6, 12, 0, 0, 0, time.UTC)
	now := started.Add(30 * time.Second)
	fresh := Holder{Instance: "controller@control pid 2", Host: "control.example", Taken: started.Add(5 * time.Second),
		Renewed: now.Add(-3 * time.Second), Epoch: 9}
	if ok, why := fresh.HeldBySince("control", started, now); !ok {
		t.Fatalf("a new controller holding the lease was not healthy: %s", why)
	}
	old := fresh
	old.Taken = started.Add(-time.Minute)
	if ok, _ := old.HeldBySince("control", started, now); ok {
		t.Error("the controller from before the build counted as the new one")
	}
	elsewhere := fresh
	elsewhere.Host = "other"
	if ok, _ := elsewhere.HeldBySince("control", started, now); ok {
		t.Error("a controller on another machine counted")
	}
	stale := fresh
	stale.Renewed = now.Add(-20 * time.Second)
	stale.Taken = stale.Renewed
	if ok, _ := stale.HeldBySince("control", started.Add(-time.Minute), now); ok {
		t.Error("a lease not renewed within its age counted as held")
	}
	if ok, _ := (Holder{}).HeldBySince("control", started, now); ok {
		t.Error("nobody counted as the holder")
	}
}

// The outcomes the operator is woken for, and the subjects the host reads.
func TestTheWitnessContractsWords(t *testing.T) {
	for outcome, urgent := range map[string]bool{OutcomeRolledBack: true, OutcomeNotReversible: true,
		OutcomeRestoreFailed: true, OutcomeHalted: true, OutcomeNothingToRestore: false, OutcomeUnwitnessed: false} {
		if Urgent(outcome) != urgent {
			t.Errorf("%s urgent: %v", outcome, Urgent(outcome))
		}
	}
	if got := LeaseReadSubject("mesh-controller_lease"); got != "$JS.API.DIRECT.GET.KV_mesh-controller_lease.$KV.mesh-controller_lease.holder" {
		t.Errorf("the lease is read on %s", got)
	}
	if got := PingSubject("ace"); got != "$SRV.PING.node-tools.ace" {
		t.Errorf("the node tools are asked on %s", got)
	}
	for c, m := range map[string]string{ComponentController: "mesh-controller", ComponentEngine: "mesh-host",
		ComponentNodeTools: "node-tools"} {
		if ModuleOf(c) != m {
			t.Errorf("%s is delivered as %s", c, ModuleOf(c))
		}
	}
}