package api

import (
	"encoding/json"
	"net/http"
	"os"
	"testing"
	"time"

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

// R-1216 / D28 = A: the shared case table (byte-identical in felhom-controller, felhom.eu scripts/host_swap_rule_gate.py).
// RED-PROOF: with the morning's rule (`guestMB > 0 && hostMB < guestMB`) the demo-hp, demo-felhom and 32 GB rows fail
// (they read short) and the „no swap, no guest" row fails (not short) — seen failing 2026-10-22.
func TestR1216_HostSwapRuleCases(t *testing.T) {
	b, err := os.ReadFile("testdata/host_swap_rule_cases.json")
	if err != nil {
		t.Fatal(err)
	}
	var f struct {
		Cases []struct {
			Name  string `json:"name"`
			Host  int64  `json:"host_swap_mb"`
			Guest int64  `json:"guest_swap_mb"`
			Short bool   `json:"short"`
		} `json:"cases"`
	}
	if err := json.Unmarshal(b, &f); err != nil || len(f.Cases) < 10 {
		t.Fatalf("case table: %v (%d cases)", err, len(f.Cases))
	}
	for _, c := range f.Cases {
		if got := hostSwapShort(c.Host, c.Guest); got != c.Short {
			t.Errorf("%s: host %d / guests %d → short=%t, want %t", c.Name, c.Host, c.Guest, got, c.Short)
		}
	}
}

// The consequence: a host that this morning's rule flagged (demo-felhom: 8191 vs 12288) gets ONE host_swap_ok at its
// next report under the new rule, and no new alarm after.
func TestR1216_TheMorningsAlarmClearsOnceAtTheNextReport(t *testing.T) {
	h, st, _ := newTestHandler(t)
	st.SaveCustomerConfig(&store.CustomerConfig{CustomerID: "c1", APIKey: "ckey", RetrievalPassword: "p"})
	st.UpsertHost(&store.Host{HostID: "h1", CustomerID: "c1", APIKey: "HKEY"})
	if _, err := st.SaveEvent("c1", eventHostSwapShort, "warning", "morning", `{"host_id":"h1","host_swap_mb":8191,"guest_swap_mb":12288}`, "hub"); err != nil {
		t.Fatal(err)
	}
	for i := 0; i < 3; i++ {
		if rr := do(h, http.MethodPost, "/host-report", "HKEY", swapReportBody("h1", 8191, 12288)); rr.Code != http.StatusOK {
			t.Fatalf("host-report = %d", rr.Code)
		}
	}
	ok, _ := st.GetEventsByType("c1", eventHostSwapOK, time.Time{})
	short, _ := st.GetEventsByType("c1", eventHostSwapShort, time.Time{})
	if len(ok) != 1 || len(short) != 1 {
		t.Fatalf("host_swap_ok = %d (want 1), host_swap_short = %d (want the morning's 1 only)", len(ok), len(short))
	}
}