package api

import (
	"net/http"
	"strings"
	"testing"
	"time"

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

func tunnelReport(status, detail string) string {
	return strings.Replace(validReportBody("h1"), `"cloudflared":{"status":"active"}`,
		`"cloudflared":{"status":"`+status+`","detail":"`+detail+`"}`, 1)
}

// R-841: the tunnel alarm fires when the tunnel is not running in TWO reports in a row; running never alarms;
// one bad report never alarms; `unknown` never alarms and breaks a run; recovery is announced once.
// Red-proof: make checkTunnel alarm on ONE not_running (drop down(1)) and "a single bad report" fails.
func TestTunnelAlarm_Sequences(t *testing.T) {
	cases := []struct {
		name  string
		seq   []string
		down  int
		recov int
	}{
		{"running never alarms", []string{"running", "running", "running"}, 0, 0},
		{"a single bad report does not alarm", []string{"running", "not_running", "running"}, 0, 0},
		{"two in a row alarm once", []string{"running", "not_running", "not_running", "not_running"}, 1, 0},
		{"unknown never alarms and breaks the run", []string{"not_running", "unknown", "not_running", "unknown"}, 0, 0},
		{"recovery after an alarm", []string{"not_running", "not_running", "running"}, 1, 1},
	}
	for _, c := range cases {
		t.Run(c.name, func(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"})
			for _, s := range c.seq {
				if rr := do(h, http.MethodPost, "/host-report", "HKEY", tunnelReport(s, "exited, exit code 1")); rr.Code != 200 {
					t.Fatalf("report: %d %s", rr.Code, rr.Body.String())
				}
			}
			since := time.Now().Add(-time.Hour)
			d, _ := st.GetEventsByType("c1", eventTunnelDown, since)
			r, _ := st.GetEventsByType("c1", eventTunnelRecovered, since)
			if len(d) != c.down || len(r) != c.recov {
				t.Fatalf("tunnel_down=%d tunnel_recovered=%d, want %d / %d", len(d), len(r), c.down, c.recov)
			}
		})
	}
}