package web

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

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

// R-685 page half (v0.272.0) — when the agent (v0.134.0+) SKIPPED a whole-box backup because it cannot fit,
// the backup page says so in plain words, in the reader's language, with the numbers the agent measured.
// Per state: a space skip (the agent's exact sentence, taken from the live proof 2026-09-24), a space skip
// whose numbers cannot be read, an ordinary failure (no line), and a success (no line); rendered through the
// REAL backups template.
//
// COMPANION RED-PROOF (REPORT.md): drop `tv.NoSpaceLine = noSpaceLine(...)` — this test fails at "a space skip
// must be said on the page".
func TestR685_BackupPageSaysTheBackupDoesNotFit(t *testing.T) {
	b, err := i18n.Shared()
	if err != nil {
		t.Fatal(err)
	}
	now := time.Date(2026, 9, 25, 9, 0, 0, 0, time.UTC)
	live := "skipped: not enough space: local has 14.9 GiB free; the last archive of guest 9201 was 7.6 GiB, so a new one needs about 11.3 GiB (old archives are removed only after a successful backup)"
	tiers := func(errText string, ok bool) []agentapi.TierBackupState {
		return []agentapi.TierBackupState{{Target: "local", Primary: true, Storage: "present",
			LastSuccess: &agentapi.BackupRecord{StartedAt: now.Add(-50 * time.Hour).Format(time.RFC3339), SizeBytes: 8 << 30},
			LastAttempt: &agentapi.TierAttempt{StartedAt: now.Add(-2 * time.Hour).Format(time.RFC3339), Success: ok, Error: errText}}}
	}
	cases := []struct {
		name, err string
		ok        bool
		want      map[string]string // lang → substring; "" = no line
	}{
		{"space skip", live, false, map[string]string{
			"hu": "A teljes rendszermentés nem fér el: 11.3 GiB kell, 14.9 GiB szabad.",
			"en": "The full system backup does not fit: it needs 11.3 GiB and 14.9 GiB is free."}},
		{"space skip, unreadable numbers", "skipped: not enough space: something new", false, map[string]string{
			"hu": "A teljes rendszermentés nem fér el a lemezen.", "en": "The full system backup does not fit on the disk."}},
		{"ordinary failure", "vzdump failed: job errors", false, map[string]string{"hu": "", "en": ""}},
		{"success", "", true, map[string]string{"hu": "", "en": ""}},
	}
	s := securityHarness(t)
	s.loadTemplates()
	for _, c := range cases {
		for _, lang := range []string{"hu", "en"} {
			msg := func(key string, a ...interface{}) string {
				if len(a) == 0 {
					return b.Msg(lang, key)
				}
				return b.Msgf(lang, key, a...)
			}
			v := &guestBackupView{Available: true}
			buildTierViews(v, tiers(c.err, c.ok), map[string]int64{"local": 86400}, now, msg)
			got := v.Tiers[0].NoSpaceLine
			if c.want[lang] == "" {
				if got != "" {
					t.Errorf("%s [%s]: no sentence expected, got %q", c.name, lang, got)
				}
				continue
			}
			if !strings.Contains(got, c.want[lang]) {
				t.Fatalf("%s [%s]: a space skip must be said on the page — got %q, want %q", c.name, lang, got, c.want[lang])
			}
			if lang == "hu" {
				var buf bytes.Buffer
				if err := s.tmpl.ExecuteTemplate(&buf, "backups", map[string]interface{}{"Page": "backups", "Title": "t", "GuestBackup": v, "Backup": map[string]interface{}{"Enabled": true, "DumpFiles": []interface{}{}}}); err != nil {
					t.Fatalf("the backups page did not render: %v", err)
				}
				out := html.UnescapeString(buf.String())
				if !strings.Contains(out, c.want[lang]) || !strings.Contains(out, `data-no-space="true"`) {
					i := strings.Index(out, "backup-tier-table")
					t.Fatalf("%s: the rendered page does not carry the sentence; near table: %q", c.name, out[max(0, i):min(len(out), i+1500)])
				}
			}
		}
	}
}