package hub

import (
	"bytes"
	"log/slog"
	"strings"
	"testing"

	"gitea.dooplex.hu/admin/felhom-agent/internal/proxmox"
)

// R-1192 follow-up (night 2026-10-21): the host report carries the host's swap and the guests' swap allowance, and the
// agent says ONCE in its log when the host's swap is below it (and once when it is covered again).
// RED-PROOF: with applySwap not called the numbers are nil; with the CompareAndSwap removed the WARN repeats.
func TestR1192_HostReportCarriesSwapAndWarnsOnce(t *testing.T) {
	var buf bytes.Buffer
	c := &Collector{logger: slog.New(slog.NewTextHandler(&buf, nil))}
	guests := []Guest{{VMID: 9201, Spec: &GuestSpec{SwapBytes: 4096 << 20}}, {VMID: 9202, Spec: nil}}
	var ns proxmox.NodeStatus // a host with no swap
	for i := 0; i < 3; i++ {
		h := HostMetrics{}
		c.applySwap(&h, ns, guests)
		if h.HostSwapMB == nil || h.GuestSwapMB == nil || *h.HostSwapMB != 0 || *h.GuestSwapMB != 4096 {
			t.Fatalf("report numbers: host %v guest %v", h.HostSwapMB, h.GuestSwapMB)
		}
	}
	if n := strings.Count(buf.String(), "host-swap: the host's swap is below"); n != 1 {
		t.Fatalf("the short WARN must be logged once, got %d:\n%s", n, buf.String())
	}
	ns.Swap.Total = 7935 << 20 // the installer's 8 GB host
	h := HostMetrics{}
	c.applySwap(&h, ns, guests)
	if *h.HostSwapMB != 7935 || HostSwapShort(*h.HostSwapMB, *h.GuestSwapMB) {
		t.Fatalf("a covered host must not be short: %v / %v", *h.HostSwapMB, *h.GuestSwapMB)
	}
	if !strings.Contains(buf.String(), "covers its guests' swap allowance again") {
		t.Fatalf("the recovery must be said once:\n%s", buf.String())
	}
	if HostSwapShort(0, 0) {
		t.Fatal("a host whose guests have no swap allowance is never short")
	}
}