package object

import (
	v2object "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object/grpc"
	"google.golang.org/protobuf/proto"
)

// Range represents v2-compatible object payload range.
type Range struct {
	objectrange *v2object.Range
}

// NewRangeFromV2 wraps v2 Range message to Range.
//
// Nil v2object.Range converts to nil.
func NewRangeFromV2(rV2 *v2object.Range) *Range {
	if rV2 == nil {
		return nil
	}
	var objectrange v2object.Range
	proto.Merge(&objectrange, rV2)
	return &Range{
		objectrange: &objectrange,
	}
}

// NewRange creates and initializes blank Range.
//
// Defaults:
//   - offset: 0;
//   - length: 0.
func NewRange() *Range {
	return NewRangeFromV2(new(v2object.Range))
}

// ToV2 converts Range to v2 Range message.
//
// Nil Range converts to nil.
func (r *Range) ToV2() *v2object.Range {
	if r == nil {
		return nil
	}
	return r.objectrange
}

// GetLength returns payload range size.
func (r *Range) GetLength() uint64 {
	if r == nil {
		return 0
	}
	return r.objectrange.GetLength()
}

// SetLength sets payload range size.
func (r *Range) SetLength(v uint64) {
	r.objectrange.SetLength(v)
}

// GetOffset sets payload range offset from start.
func (r *Range) GetOffset() uint64 {
	if r == nil {
		return 0
	}
	return r.objectrange.GetOffset()
}

// SetOffset gets payload range offset from start.
func (r *Range) SetOffset(v uint64) {
	r.objectrange.SetOffset(v)
}