{{/*
Copyright 2019-present Facebook Inc. All rights reserved.
This source code is licensed under the Apache 2.0 license found
in the LICENSE file in the root directory of this source tree.
*/}}

{{/* gotype: entgo.io/ent/entc/gen.typeScope */}}

{{ define "dialect/gremlin/group" }}
{{ $builder := pascal $.Scope.Builder }}
{{ $receiver := $.Scope.Receiver }}

func ({{ $receiver }} *{{ $builder }}) gremlinScan(ctx context.Context, root *{{ $.QueryName }}, v any) error {
	var (
		trs []any
		names []any
	)
	for _, fn := range {{ $receiver }}.fns {
		name, tr := fn("p", "")
		trs = append(trs, tr)
		names = append(names, name)
	}
	for _, f := range *{{ $receiver }}.flds {
		names = append(names, f)
		trs = append(trs, __.As("p").Unfold().Values(f).As(f))
	}
	query, bindings := root.gremlinQuery(ctx).Group().
				By(__.Values(*{{ $receiver }}.flds...).Fold()).
				By(__.Fold().Match(trs...).Select(names...)).
				Select(dsl.Values).
				Next().
				Query()
	res := &gremlin.Response{}
	if err := {{ $receiver }}.build.driver.Exec(ctx, query, bindings, res); err != nil {
		return err
	}
	if len(*{{ $receiver }}.flds)+len({{ $receiver }}.fns) == 1 {
		return res.ReadVal(v)
	}
	vm, err := res.ReadValueMap()
	if err != nil {
		return err
	}
	return vm.Decode(v)
}
{{ end }}