package helper

import (
	"github.com/gshopify/service-wrapper/fun"
	"github.com/gshopify/service-wrapper/interfaces"
	"github.com/gshopify/service-wrapper/model"
	"gshopper.com/gshopify/products/graphql/generated"
)

func NewStringConnection[T interfaces.Node](src []T,
	first *int, last *int, reverse *bool) (*generated.StringConnection, error) {
	var connection = &generated.StringConnection{}

	if len(src) == 0 {
		return connection, nil
	}

	if reverse != nil && *reverse {
		src = fun.Reverse(src)
	}

	src = fun.First(src, first)
	src = fun.Last(src, last)
	connection.PageInfo = model.NewPageInfo(src, "", src[0], src[len(src)-1])

	// Edges
	for i := range src {
		connection.Edges = append(connection.Edges, &generated.StringEdge{
			Cursor: *model.NewSimpleCursor(src[i].GetID()).String(),
			Node:   src[i].GetID(),
		})
	}

	return connection, nil
}