package notify

import (
	"io"
	"log"
	"testing"
)

// R-339, Group G — THE WIRING TEST, and it is not optional.
//
// The recovery leg spans two packages: internal/monitor emits, internal/notify routes. A fake-injected
// test in monitor proves the checker emits and proves NOTHING about whether the operator receives the
// mail. Both `*_box_recovered` events carry severity "info", and severityNotifies drops "info" — so
// without an entry in recoveredPairedDownTypes they are stored and never mailed, and the operator is
// told the off-site tier went blind and never told it came back.
//
// Precedent for why this test exists at all: agent v0.91.0 shipped fully green with SetAuthSink never
// called from main.go, and the entire auth-honesty leg was inert. A green unit test on one side of a
// seam is not evidence that the seam is connected.
//
// These drive ProcessEvent end-to-end and assert a MAIL, not a map entry. A map assertion would pass
// on a correctly-populated map that nothing reads.

func TestBoxRecovery_ReachesTheOperatorDespiteInfoSeverity(t *testing.T) {
	if severityNotifies("info") {
		t.Fatal("premise changed: \"info\" now notifies, so the pairing entries may be unnecessary — re-check")
	}
	for _, et := range []string{"pbsdr_box_recovered", "offsite_box_recovered"} {
		st := newDispStore(t)
		d := NewDispatcher(st, "test-key", "hub@felhom.eu", "op@felhom.eu", true, log.New(io.Discard, "", 0))
		mails := captureSeam(d)

		scope := "pbsdr-box"
		if et == "offsite_box_recovered" {
			scope = "pool-box"
		}
		d.ProcessEvent(scope, et, "info", "reachable again after 45m0s", `{"scope":"`+scope+`"}`, "hub")

		op := mailsFor(*mails, "op@felhom.eu")
		if len(op) != 1 {
			t.Fatalf("%s: operator mails = %d, want 1 — the all-clear must reach the operator; "+
				"0 means the recoveredPairedDownTypes entry is missing and \"info\" was dropped by the severity gate",
				et, len(op))
		}
		// Customer leg is a no-op BY CONSTRUCTION: the scope is not a customer id, so no prefs row
		// exists and no paired customer "sent" row can be found.
		if len(*mails) != 1 {
			t.Fatalf("%s: total mails = %d, want 1 — a customer-less scope must never produce a customer mail",
				et, len(*mails))
		}
	}
}

// The DOWN edge needs no pairing entry — "warning" already notifies — but if that ever changed the
// operator would hear the all-clear for an outage they were never told about. Pin both edges.
func TestBoxUnreachable_ReachesTheOperatorOnItsOwnSeverity(t *testing.T) {
	for _, c := range []struct{ scope, et string }{
		{"pbsdr-box", "pbsdr_box_unreachable"},
		{"pool-box", "offsite_box_unreachable"},
	} {
		st := newDispStore(t)
		d := NewDispatcher(st, "test-key", "hub@felhom.eu", "op@felhom.eu", true, log.New(io.Discard, "", 0))
		mails := captureSeam(d)

		d.ProcessEvent(c.scope, c.et, "warning", "unreachable — 3 consecutive checks failed", `{"scope":"`+c.scope+`"}`, "hub")

		op := mailsFor(*mails, "op@felhom.eu")
		if len(op) != 1 {
			t.Fatalf("%s: operator mails = %d, want 1", c.et, len(op))
		}
		if len(*mails) != 1 {
			t.Fatalf("%s: total mails = %d, want 1 — operator-only", c.et, len(*mails))
		}
	}
}

// Both recovery types must be registered against the RIGHT down type. A recovery paired with the
// wrong down event would still mail the operator (processOperator runs unconditionally) while
// silently breaking the customer pairing rule for any future customer-scoped reuse.
func TestBoxRecovery_PairedWithTheCorrectDownType(t *testing.T) {
	want := map[string]string{
		"pbsdr_box_recovered":   "pbsdr_box_unreachable",
		"offsite_box_recovered": "offsite_box_unreachable",
	}
	for rec, down := range want {
		paired, ok := recoveredPairedDownTypes[rec]
		if !ok {
			t.Fatalf("%s is not on the recovery branch — its \"info\" severity makes it silent", rec)
		}
		found := false
		for _, p := range paired {
			if p == down {
				found = true
			}
		}
		if !found {
			t.Fatalf("%s must pair with %s; got %v", rec, down, paired)
		}
	}
}