package monitor

// R-998 (doc 14) — A BOX THE HOUSEHOLD SWITCHED OFF IS NOT A BOX THAT DIED, FOR 14 DAYS.
//
// The consequence is asserted, not the mechanism: does the alarm fire? Each "held" case runs beside a CONTROL
// with the same silence and no power-off, which must alarm — a quiet result alone could mean a broken fixture.

import (
	"database/sql"
	"io"
	"log"
	"strings"
	"testing"
	"time"

	"gitea.dooplex.hu/admin/felhom-hub/internal/store"
)

type offRig struct {
	st     *store.Store
	path   string
	node   *StalenessChecker
	host   *HostStalenessChecker
	events []string
	msgs   []string
}

// newOffRig: one customer with one host, both reporting NOW, both checkers having seen them healthy.
func newOffRig(t *testing.T) *offRig {
	t.Helper()
	st, path := seedStalenessCustomer(t, "ok", 0)
	if err := st.UpsertHost(&store.Host{HostID: "h1", CustomerID: "c1", APIKey: "k1"}); err != nil {
		t.Fatal(err)
	}
	if err := st.SaveHostReport("h1", "c1", []byte(`{}`), store.HostReportDenorm{}); err != nil {
		t.Fatal(err)
	}
	r := &offRig{st: st, path: path}
	on := func(cid, et, sev, msg, det, src string) {
		r.events = append(r.events, et)
		r.msgs = append(r.msgs, msg)
	}
	r.node = NewStalenessChecker(st, 30*time.Minute, on, log.New(io.Discard, "", 0))
	r.host = NewHostStalenessChecker(st, 30*time.Minute, on, log.New(io.Discard, "", 0))
	r.node.Check()
	r.host.Check()
	if len(r.events) != 0 {
		t.Fatalf("setup emitted %v", r.events)
	}
	return r
}

// silent ages both the controller's and the agent's last report by d.
func (r *offRig) silent(t *testing.T, d time.Duration) {
	t.Helper()
	db, err := sql.Open("sqlite", r.path)
	if err != nil {
		t.Fatal(err)
	}
	defer db.Close()
	at := time.Now().UTC().Add(-d).Format("2006-01-02 15:04:05")
	if _, err := db.Exec(`UPDATE reports SET received_at = ? WHERE customer_id = 'c1'`, at); err != nil {
		t.Fatal(err)
	}
	if _, err := db.Exec(`UPDATE hosts SET last_report_at = ? WHERE host_id = 'h1'`, at); err != nil {
		t.Fatal(err)
	}
}

func (r *offRig) offAt(t *testing.T, ago time.Duration) {
	t.Helper()
	at := time.Now().UTC().Add(-ago).Truncate(time.Second)
	if _, err := r.st.SetHostDeliberateOff("h1", &at); err != nil {
		t.Fatal(err)
	}
}

func (r *offRig) check() { r.node.Check(); r.host.Check() }

func hasEvent(evs []string, want string) bool {
	for _, e := range evs {
		if e == want {
			return true
		}
	}
	return false
}

// Silent for 3 hours: the control alarms node_down + host_down; the switched-off box raises nothing.
func TestDeliberateOff_NoSilenceAlarmDuringTheHold(t *testing.T) {
	ctl := newOffRig(t)
	ctl.silent(t, 3*time.Hour)
	ctl.check()
	if !hasEvent(ctl.events, "node_down") || !hasEvent(ctl.events, "host_down") {
		t.Fatalf("CONTROL: a box silent 3 h must alarm, got %v — the fixture is broken", ctl.events)
	}

	r := newOffRig(t)
	r.offAt(t, 3*time.Hour)
	r.silent(t, 3*time.Hour)
	r.check()
	r.check()
	if len(r.events) != 0 {
		t.Fatalf("a box the household switched off alarmed: %v", r.events)
	}
	if r.node.GetState("c1") != StateDeliberateOff || r.host.GetState("h1") != "off" {
		t.Fatalf("states node=%q host=%q, want %q / off", r.node.GetState("c1"), r.host.GetState("h1"), StateDeliberateOff)
	}
}

// After the 14-day hold, still silent → the usual alarms fire, and their text names the power-off.
func TestDeliberateOff_AlarmsAfterFourteenDays(t *testing.T) {
	r := newOffRig(t)
	r.offAt(t, 13*24*time.Hour)
	r.silent(t, 13*24*time.Hour)
	r.check()
	if len(r.events) != 0 {
		t.Fatalf("day 13: %v", r.events)
	}
	r.offAt(t, 14*24*time.Hour+time.Minute) // the hold ran out
	r.silent(t, 14*24*time.Hour+time.Minute)
	r.check()
	if !hasEvent(r.events, "node_down") || !hasEvent(r.events, "host_down") {
		t.Fatalf("after 14 days: events %v, want node_down + host_down", r.events)
	}
	for _, m := range r.msgs {
		if !strings.Contains(m, "household") {
			t.Fatalf("the alarm does not say the household switched it off: %q", m)
		}
	}
	r.check() // once, not every minute
	if len(r.events) != 2 {
		t.Fatalf("repeated: %v", r.events)
	}
}

// Switched back on inside the hold: reports resume → no recovery mail for an outage that never was.
func TestDeliberateOff_BackOnIsQuiet(t *testing.T) {
	r := newOffRig(t)
	r.offAt(t, 2*time.Hour)
	r.silent(t, 2*time.Hour)
	r.check()
	r.silent(t, 0)
	if _, err := r.st.SetHostDeliberateOff("h1", nil); err != nil { // the new boot's first report
		t.Fatal(err)
	}
	r.check()
	if len(r.events) != 0 {
		t.Fatalf("back on: %v", r.events)
	}
	if r.node.GetState("c1") != "ok" || r.host.GetState("h1") != "ok" {
		t.Fatalf("states node=%q host=%q, want ok", r.node.GetState("c1"), r.host.GetState("h1"))
	}
}

// The 05:00 deadline: Tester 2's shape (R-872) alarms; the same box switched off by the household does not.
func TestDeliberateOff_DeadlineSkips(t *testing.T) {
	st, _, sc := downBox(t, 5*24*time.Hour)
	if got := deadlineEvents(st, sc); got["expected_backup_missed"] != 1 {
		t.Fatalf("CONTROL: %v — the down box must raise its missed-backup alarm", got)
	}
	st2, _, sc2 := downBox(t, 5*24*time.Hour)
	at := time.Now().UTC().Add(-2 * time.Hour)
	if _, err := st2.SetHostDeliberateOff("h1", &at); err != nil {
		t.Fatal(err)
	}
	if got := deadlineEvents(st2, sc2); len(got) != 0 {
		t.Fatalf("a switched-off box got deadline alarms: %v", got)
	}
}

// One switched-off machine must not hold the alarms of the customer's OTHER machine (security review 2026-10-13).
func TestDeliberateOff_OneOfTwoHostsDoesNotHoldTheCustomer(t *testing.T) {
	r := newOffRig(t)
	if err := r.st.UpsertHost(&store.Host{HostID: "h2", CustomerID: "c1", APIKey: "k2"}); err != nil {
		t.Fatal(err)
	}
	r.offAt(t, 3*time.Hour) // only h1 is switched off
	if _, held := r.st.CustomerDeliberatelyOff("c1", time.Now()); held {
		t.Fatal("the customer is held although its second machine was never switched off")
	}
	r.silent(t, 3*time.Hour)
	r.node.Check()
	if !hasEvent(r.events, "node_down") {
		t.Fatalf("the customer-level alarm was held by one machine of two: %v", r.events)
	}
}