package store

import (
	"path/filepath"
	"testing"
)

// stopmemory_test.go: the v16 presented memory — accumulation semantics only; the predicate that reads
// it lives in the pipeline and is pinned there.

func TestStopMemoryAccumulatesAndNeverInventsRows(t *testing.T) {
	s, err := Open(filepath.Join(t.TempDir(), "m.db"))
	if err != nil {
		t.Fatal(err)
	}
	defer s.Close()

	got, err := s.StopPresentedSurfaces("b1")
	if err != nil || len(got) != 0 {
		t.Fatalf("an untouched book has an empty memory: %v / %v", got, err)
	}
	if err := s.MarkStopPresented("b1", []string{"方源", "", "花家"}); err != nil {
		t.Fatal(err)
	}
	// Idempotent, and growth-only: re-marking adds nothing, marking more only adds.
	if err := s.MarkStopPresented("b1", []string{"方源", "青茅山"}); err != nil {
		t.Fatal(err)
	}
	got, err = s.StopPresentedSurfaces("b1")
	if err != nil {
		t.Fatal(err)
	}
	want := map[string]bool{"方源": true, "花家": true, "青茅山": true}
	if len(got) != len(want) {
		t.Fatalf("got %v, want %v (a blank surface must be dropped, not stored as «everything blank is seen»)", got, want)
	}
	for k := range want {
		if !got[k] {
			t.Fatalf("missing %q in %v", k, got)
		}
	}
	// Book-scoped: another book's memory is untouched.
	other, err := s.StopPresentedSurfaces("b2")
	if err != nil || len(other) != 0 {
		t.Fatalf("the memory is per book: %v / %v", other, err)
	}
}