package store

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

func TestAppendFocusReplayRoundTrips(t *testing.T) {
	dir := filepath.Join(t.TempDir(), "sessions")
	id := "session-x"
	events := []FocusEvent{
		{AtUnixMillis: 1000, Class: "code", Title: "a", Available: true},
		{AtUnixMillis: 2000, Class: "firefox", Title: "b", Available: true},
		{AtUnixMillis: 3000, Class: "", Title: "", Available: false, Reason: "no active window"},
	}
	for _, e := range events {
		if err := AppendFocus(dir, id, e); err != nil {
			t.Fatalf("append: %v", err)
		}
	}
	got, err := ReplaySession(dir, id)
	if err != nil {
		t.Fatalf("replay: %v", err)
	}
	if len(got) != len(events) {
		t.Fatalf("got %d events, want %d", len(got), len(events))
	}
	for i := range events {
		if got[i] != events[i] {
			t.Errorf("event %d: got %+v want %+v", i, got[i], events[i])
		}
	}
}

func TestReplayMissingSessionIsEmpty(t *testing.T) {
	got, err := ReplaySession(filepath.Join(t.TempDir(), "sessions"), "nope")
	if err != nil {
		t.Fatalf("missing session should not error: %v", err)
	}
	if len(got) != 0 {
		t.Fatalf("missing session should be empty, got %d", len(got))
	}
}

func TestPruneOlderThan(t *testing.T) {
	dir := filepath.Join(t.TempDir(), "sessions")
	_ = AppendFocus(dir, "old", FocusEvent{AtUnixMillis: 1})
	_ = AppendFocus(dir, "new", FocusEvent{AtUnixMillis: 1})

	now := time.Date(2026, 5, 31, 12, 0, 0, 0, time.UTC)
	oldTime := now.Add(-40 * 24 * time.Hour)
	if err := os.Chtimes(filepath.Join(dir, "old.jsonl"), oldTime, oldTime); err != nil {
		t.Fatalf("chtimes: %v", err)
	}

	if err := PruneOlderThan(dir, 30*24*time.Hour, now); err != nil {
		t.Fatalf("prune: %v", err)
	}
	if _, err := os.Stat(filepath.Join(dir, "old.jsonl")); !os.IsNotExist(err) {
		t.Errorf("old session should be pruned")
	}
	if _, err := os.Stat(filepath.Join(dir, "new.jsonl")); err != nil {
		t.Errorf("new session should survive: %v", err)
	}
}

func TestPruneMissingDirIsNoop(t *testing.T) {
	if err := PruneOlderThan(filepath.Join(t.TempDir(), "nope"), time.Hour, time.Now()); err != nil {
		t.Fatalf("missing dir should be a no-op, got %v", err)
	}
}