package app

import (
	"path/filepath"
	"testing"
	"time"
)

func TestAdjustFlushPeriodGrowsOnSlowCycle(t *testing.T) {
	current := 2 * time.Second
	got := adjustFlushPeriod(current, 4*time.Second, false, 0)
	if got <= current {
		t.Fatalf("adjustFlushPeriod=%s want > %s", got, current)
	}
}

func TestAdjustFlushPeriodShrinksAfterFastCycles(t *testing.T) {
	current := 10 * time.Second
	got := adjustFlushPeriod(current, 2*time.Second, true, blackboxRecoveryFastCount)
	if got >= current {
		t.Fatalf("adjustFlushPeriod=%s want < %s", got, current)
	}
	if got < blackboxMinFlushPeriod {
		t.Fatalf("adjustFlushPeriod=%s below min %s", got, blackboxMinFlushPeriod)
	}
}

func TestReadBlackboxState(t *testing.T) {
	path := filepath.Join(t.TempDir(), "blackbox-state.json")
	want := BlackboxState{
		Status:           "running",
		BootStartedAtUTC: "2026-04-24T00:00:00Z",
		BootFolder:       "boot-folder",
		UpdatedAtUTC:     "2026-04-24T00:00:01Z",
		Targets: []BlackboxTargetStatus{{
			EnrollmentID: "bb-1",
			Device:       "/dev/sdb1",
			Status:       "running",
			FlushPeriod:  "1s",
		}},
	}
	if err := writeJSONAtomic(path, want); err != nil {
		t.Fatalf("writeJSONAtomic: %v", err)
	}
	got, err := ReadBlackboxState(path)
	if err != nil {
		t.Fatalf("ReadBlackboxState: %v", err)
	}
	if got.Status != want.Status || got.BootFolder != want.BootFolder || len(got.Targets) != 1 || got.Targets[0].EnrollmentID != "bb-1" {
		t.Fatalf("state=%+v", got)
	}
}