package state

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

func newStore(t *testing.T) *Store {
	t.Helper()
	return &Store{Root: t.TempDir()}
}

func TestSaveAndLoadLast(t *testing.T) {
	s := newStore(t)
	rec := RunRecord{
		StartedAt: time.Date(2026, 4, 13, 10, 0, 0, 0, time.UTC),
		EndedAt:   time.Date(2026, 4, 13, 10, 1, 0, 0, time.UTC),
		Modules:   []ModuleRecord{{ID: "hello", Status: "succeeded", Duration: "1s"}},
	}
	if err := s.Save(rec, 10); err != nil {
		t.Fatal(err)
	}
	got, ok, err := s.LastRun()
	if err != nil || !ok {
		t.Fatalf("LastRun err=%v ok=%v", err, ok)
	}
	if len(got.Modules) != 1 || got.Modules[0].ID != "hello" {
		t.Fatalf("modules = %+v", got.Modules)
	}
}

func TestLastRunMissingReturnsFalse(t *testing.T) {
	s := newStore(t)
	_, ok, err := s.LastRun()
	if err != nil {
		t.Fatal(err)
	}
	if ok {
		t.Fatal("expected ok=false")
	}
}

func TestRotateKeepsNewest(t *testing.T) {
	s := newStore(t)
	for i := 0; i < 12; i++ {
		rec := RunRecord{
			StartedAt: time.Date(2026, 1, 1, 0, 0, i, 0, time.UTC),
			EndedAt:   time.Date(2026, 1, 1, 0, 0, i, 0, time.UTC),
		}
		if err := s.Save(rec, 5); err != nil {
			t.Fatal(err)
		}
	}
	entries, err := os.ReadDir(filepath.Join(s.Root, "runs"))
	if err != nil {
		t.Fatal(err)
	}
	if len(entries) != 5 {
		t.Fatalf("runs count = %d, want 5", len(entries))
	}
}