package dts

import (
	"database/sql"
	"database/sql/driver"
	"encoding/json"
)

type NullTime sql.NullTime

func (nt *NullTime) Scan(value any) error {
	st := new(sql.NullTime)
	err := st.Scan(value)
	nt.Time = st.Time
	nt.Valid = st.Valid
	return err
}

func (nt NullTime) Value() (driver.Value, error) {
	if !nt.Valid {
		return nil, nil
	}
	return nt.Time, nil
}

func (nt NullTime) MarshalJSON() ([]byte, error) {
	if nt.Valid {
		return nt.Time.MarshalJSON()
	}
	return json.Marshal(nil)
}

func (nt *NullTime) UnmarshalJSON(b []byte) error {
	if string(b) == "null" {
		nt.Valid = false
		return nil
	}
	err := json.Unmarshal(b, &nt.Time)
	if err == nil {
		nt.Valid = true
	}
	return err
}