package web

import (
	"fmt"
	"io"
	"log"
	"strings"
	"testing"
	"time"

	"gitea.dooplex.hu/admin/felhom-controller/internal/config"
	"gitea.dooplex.hu/admin/felhom-controller/internal/monitor"
)

// R-906 — the banner showed „+ 5 további figyelmeztetés" with no warning above it. 9202 (2026-10-08) carried nine
// „not on a separate drive" warnings (Inline, PageOnly dashboard/monitoring) and the hub-off warning: the cap took the
// first five of all ten, counted five into the overflow line, and the layout then dropped all five visible ones,
// because they belong under the storage bars, not in the banner. Every page showed only the overflow line, and the
// hub-off warning — the one that DID belong in the banner — was cut.
//
// RED-PROOF (REPORT-dashboard-layout.md): point baseData and the monitoring handler back at GetAlerts and every page fails
// (overflow line present, hub-off banner missing).
func TestR906_OverflowCountsOnlyThisPagesBannerAlerts(t *testing.T) {
	s := newDashboardServer(t, time.Time{})
	am := NewAlertManager(log.New(io.Discard, "", 0))
	var warnings, kinds []string
	for i := 0; i < 9; i++ {
		warnings = append(warnings, fmt.Sprintf("Az adattároló (/mnt/hdd/app%d) nem külön meghajtón van", i))
		kinds = append(kinds, monitor.WarnKindStorageNotSeparate)
	}
	cfg := &config.Config{}
	cfg.Hub.Enabled = false // the hub-off warning: the one banner alert this box has
	cfg.Backup.Enabled = true
	am.Refresh(&monitor.HealthReport{Status: "warn", Warnings: warnings, WarningKinds: kinds}, cfg, nil, false, "")
	s.alertManager = am

	if n := len(am.alerts); n != 10 {
		t.Fatalf("setup: %d alerts, want 10 (nine inline disk warnings + hub off)", n)
	}

	for _, path := range []string{"/launcher", "/stacks", "/backups", "/monitoring", "/launcher?lang=en", "/stacks?lang=en"} {
		rec := getPage(t, s, path)
		if rec.Code != 200 {
			t.Fatalf("GET %s = %d", path, rec.Code)
		}
		body := rec.Body.String()
		if strings.Contains(body, "alert-banner-info") {
			t.Errorf("%s: an overflow line is shown, but this page shows no more than one banner alert", path)
		}
		if got := strings.Count(body, "alert-banner-warning"); got != 1 {
			t.Errorf("%s: %d warning banners, want 1 (the hub-off warning)", path, got)
		}
	}
}

// The cap still works: six alerts that ALL belong in the banner show five and „+ 1".
func TestR906_CapStillCountsBannerAlerts(t *testing.T) {
	am := NewAlertManager(log.New(io.Discard, "", 0))
	var warnings []string
	for i := 0; i < 5; i++ {
		warnings = append(warnings, fmt.Sprintf("CPU warning %d", i))
	}
	cfg := &config.Config{}
	cfg.Hub.Enabled = false
	cfg.Backup.Enabled = true
	am.Refresh(&monitor.HealthReport{Status: "warn", Warnings: warnings, WarningKinds: make([]string, 5)}, cfg, nil, false, "")

	got := am.GetBannerAlerts("launcher", "hu")
	if len(got) != 6 || got[5].ID != "overflow" || !strings.Contains(got[5].Message, "1") {
		t.Fatalf("six banner alerts: got %d, last %+v — want five and an overflow of 1", len(got), got[len(got)-1])
	}
	// An Inline/PageOnly alert never enters the banner list, on any page.
	for _, page := range []string{"dashboard", "monitoring", "launcher"} {
		for _, a := range am.GetBannerAlerts(page, "hu") {
			if !bannerShows(a, page) && a.ID != "overflow" {
				t.Errorf("%s: %q is not a banner alert on this page", page, a.ID)
			}
		}
	}
}