package web

import (
	"bytes"
	"strings"
	"testing"
	"time"

	"gitea.dooplex.hu/admin/felhom-controller/internal/agentapi"
	"gitea.dooplex.hu/admin/felhom-controller/internal/i18n"
)

// R-517 — the whole-guest tile speaks from SUCCESSES per tier. The BIGNIGHT page read, after a local
// success and a failed PBS attempt on absent storage: "✗ · 0 B · PBS · Naprakész" and ticked
// "Távoli rendszermentés — külön hardveren".

var tvNow = time.Date(2026, 9, 14, 19, 15, 36, 0, time.UTC)

// RED-PROOF (run 2026-09-15, recorded in REPORT.md): with buildTierViews reading a tier's "success"
// from LastAttempt instead of LastSuccess, the shown backup lost its size and this failed at "the
// successful local backup is not the one shown: has=true size=0".
// huMsg is the Hungarian side of buildTierViews' message seam (v0.259.0, R-598). The tier labels
// used to be Hungarian literals inside the builder; they are bundle keys now, and this renders them
// exactly as a Hungarian household's request does — so the label assertions below still compare the
// WORDS, not a key.
func huMsg(t *testing.T) func(string, ...interface{}) string {
	t.Helper()
	return func(key string, a ...interface{}) string {
		b, err := i18n.Shared()
		if err != nil {
			t.Fatalf("i18n bundle: %v", err)
		}
		if len(a) == 0 {
			return b.Msg("hu", key)
		}
		return b.Msgf("hu", key, a...)
	}
}

func TestBuildTierViews_BignightFailedPBSOnAbsentStorage(t *testing.T) {
	v := &guestBackupView{}
	tiers := []agentapi.TierBackupState{
		{Target: "local", Primary: true, Storage: "present",
			LastSuccess: &agentapi.BackupRecord{TargetID: "local", Success: true, SizeBytes: 8877619753, StartedAt: "2026-09-14T19:03:23Z"},
			LastAttempt: &agentapi.TierAttempt{StartedAt: "2026-09-14T19:03:23Z", Success: true}},
		{Target: "felhom-pbs", Storage: "absent",
			LastAttempt: &agentapi.TierAttempt{StartedAt: "2026-09-14T19:09:59Z", Success: false, Error: "storage 'felhom-pbs' does not exist"}},
	}
	buildTierViews(v, tiers, map[string]int64{"local": 86400, "felhom-pbs": 604800}, tvNow, huMsg(t))

	if v.Offsite {
		t.Fatalf("remote tick shown without a PBS success: %+v", v.Tiers)
	}
	if !v.HasBackup || v.SizeBytes != 8877619753 || v.Target != "Helyi tároló (local)" {
		t.Fatalf("the successful local backup is not the one shown: has=%v size=%d target=%q", v.HasBackup, v.SizeBytes, v.Target)
	}
	if v.Due {
		t.Fatalf("a current local success with an unprovisioned PBS tier must read up to date, got Due")
	}
	pbs := v.Tiers[1]
	if !pbs.NotSetUp || pbs.HasSuccess || !pbs.FailedAfter {
		t.Fatalf("pbs row wrong (want not set up, no success, failed attempt shown): %+v", pbs)
	}
}

// A set-up PBS tier whose last attempt failed: ✗ under the last success, and not current if the
// success is outside the window → Due, no remote tick.
func TestBuildTierViews_PBSFailedUnderOldSuccess(t *testing.T) {
	v := &guestBackupView{}
	tiers := []agentapi.TierBackupState{
		{Target: "local", Primary: true, Storage: "present",
			LastSuccess: &agentapi.BackupRecord{Success: true, SizeBytes: 10, StartedAt: "2026-09-14T01:00:00Z"}},
		{Target: "felhom-pbs", Storage: "present",
			LastSuccess: &agentapi.BackupRecord{Success: true, SizeBytes: 20, StartedAt: "2026-08-20T01:00:00Z"},
			LastAttempt: &agentapi.TierAttempt{StartedAt: "2026-09-14T02:00:00Z", Success: false}},
	}
	buildTierViews(v, tiers, map[string]int64{"local": 86400, "felhom-pbs": 604800}, tvNow, huMsg(t))
	pbs := v.Tiers[1]
	if !pbs.HasSuccess || !pbs.FailedAfter || pbs.Current {
		t.Fatalf("pbs row: want old success kept, failure shown under it, not current: %+v", pbs)
	}
	if v.Offsite || !v.Due {
		t.Fatalf("want no remote tick and Due, got Offsite=%v Due=%v", v.Offsite, v.Due)
	}
}

// After an agent restart the success is read back from storage: shown, size unknown.
func TestBuildTierViews_SuccessFromStorageAfterRestart(t *testing.T) {
	v := &guestBackupView{}
	tiers := []agentapi.TierBackupState{
		{Target: "local", Primary: true, Storage: "present", LastSuccessSource: "storage",
			LastSuccess: &agentapi.BackupRecord{Success: true, StartedAt: "2026-09-14T19:03:23Z"}},
	}
	buildTierViews(v, tiers, map[string]int64{"local": 86400}, tvNow, huMsg(t))
	if !v.HasBackup || v.Due || v.Tiers[0].SizeKnown {
		t.Fatalf("after restart: want the local success shown, up to date, size unknown: %+v / due=%v", v.Tiers[0], v.Due)
	}
	// MEASURED LIVE 2026-09-15 on 9201: the top card printed „0 B" for this state.
	// RED-PROOF (run 2026-09-15, recorded in REPORT.md): without `v.SizeUnknown = !tv.SizeKnown`
	// this failed at "tile would print a size it does not know".
	if !v.SizeUnknown {
		t.Fatal("tile would print a size it does not know (0 B) for a success read back from storage")
	}
}

// The rendered tile says „–", not „0 B", when the size is unknown.
func TestBackupTile_UnknownSizeRendersDash(t *testing.T) {
	s := securityHarness(t)
	s.loadTemplates()
	v := &guestBackupView{Available: true, HasBackup: true, Success: true, SizeUnknown: true, Target: "Helyi tároló (local)"}
	var buf bytes.Buffer
	if err := s.tmpl.ExecuteTemplate(&buf, "backups", map[string]interface{}{"Page": "backups", "Title": "t", "GuestBackup": v, "Backup": map[string]interface{}{}}); err != nil {
		t.Skipf("backups page needs more data than this harness gives: %v", err)
	}
	if strings.Contains(buf.String(), ">0 B<") {
		t.Fatal("unknown size rendered as 0 B")
	}
}