package schema

import (
	"context"
	"path/filepath"
	"testing"

	"github.com/metazla/meta-core/internal/kv"
)

func TestRebuildDerivesTypesFromTheStore(t *testing.T) {
	store, err := kv.Open(filepath.Join(t.TempDir(), "kv.db"), kv.Options{})
	if err != nil {
		t.Fatal(err)
	}
	defer store.Close()
	if err := store.Update(context.Background(), func(tx *kv.Tx) error {
		for k, v := range map[string]string{
			"file:A/sizeByte":   "100",
			"file:B/sizeByte":   "200",
			"file:A/title/eng":  "One",
			"file:B/title/fre":  "Deux",
			"file:A/mixed":      "1",
			"file:B/mixed":      "x",
			"cid:bafknotrecord": "A",
		} {
			if err := tx.Put(k, v); err != nil {
				return err
			}
		}
		return nil
	}); err != nil {
		t.Fatal(err)
	}

	ix := NewIndexer(store)
	if got := ix.Snapshot(); got.Source != "pending" || len(got.Fields) != 0 {
		t.Fatalf("before a scan: %+v", got)
	}
	snap, err := ix.Rebuild(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	if f := snap.Fields["sizeByte"]; f == nil || f.Type != PrimInt || f.Breakdown["int"] != 2 {
		t.Fatalf("sizeByte = %+v", f)
	}
	if f := snap.Fields["title"]; f == nil || f.KeyHint != KeyHintLanguageCode {
		t.Fatalf("title = %+v (want language-keyed)", f)
	}
	if f := snap.Fields["mixed"]; f == nil || f.Type != PrimMixed {
		t.Fatalf("mixed = %+v", f)
	}
	if len(snap.Fields) != 3 {
		t.Fatalf("fields = %v (non-record keys must not count)", snap.Fields)
	}
}