package tunnelbroker

import (
	`database/sql/driver`
	`net/netip`
)

// MarshalText returns a text representation (as bytes) of a TunPrefix.
func (t *TunPrefix) MarshalText() (b []byte, err error) {

	if t == nil {
		return
	}

	b = []byte(t.ToPrefix().String())

	return
}

// Scan conforms a TunPrefix to a sql.Scanner. It populates t with val.
func (t *TunPrefix) Scan(val interface{}) (err error) {

	var pfx netip.Prefix
	var s string

	if val == nil {
		return
	}

	switch v := val.(type) {
	case string:
		s = v
	case []byte:
		s = string(v)
	default:
		err = ErrBadPrefixValue
		return
	}

	if pfx, err = netip.ParsePrefix(s); err != nil {
		return
	}

	*t = TunPrefix(pfx)

	return
}

// ToPrefix returns a netip.Prefix from a TunPrefix.
func (t *TunPrefix) ToPrefix() (pfx *netip.Prefix) {

	if t == nil {
		return
	}

	pfx = new(netip.Prefix)
	*pfx = netip.Prefix(*t)

	return
}

// UnmarshalText populates a TunPrefix from a text representation.
func (t *TunPrefix) UnmarshalText(b []byte) (err error) {

	var pfx netip.Prefix

	if b == nil || len(b) == 0 {
		return
	}

	if pfx, err = netip.ParsePrefix(string(b)); err != nil {
		return
	}

	*t = TunPrefix(pfx)

	return
}

// Value conforms a TunPrefix to a sql/driver.Valuer interface. It returns val from t.
func (t TunPrefix) Value() (val driver.Value, err error) {

	val = t.ToPrefix().String()

	return
}