package ogen_types

import (
	"errors"

	"github.com/go-faster/jx"
)

type Decimal struct {
	Value    int64
	Exponent int
}

var ErrUnknownField = errors.New("unknown field")

func (o *Decimal) Encode(e *jx.Encoder) {
	e.ObjStart()
	e.FieldStart("value")
	e.Int64(o.Value)
	e.FieldStart("exponent")
	e.Int(o.Exponent)
	e.ObjEnd()
}

func (o *Decimal) Decode(d *jx.Decoder) error {
	err := d.Obj(func(d *jx.Decoder, key string) (err error) {
		if key == "exponent" {
			if o.Exponent, err = d.Int(); err != nil {
				return err
			}
		} else if key == "value" {
			if o.Value, err = d.Int64(); err != nil {
				return err
			}
		} else {
			err = ErrUnknownField
		}

		return err
	})
	return err
}

func (d *Decimal) MarshalJSON() ([]byte, error) {
	return []byte{0x00, 0x01, 0x02}, nil
}

func (d *Decimal) UnmarshalJSON(data []byte) error {
	return nil
}