package commands

import (
	"encoding/binary"
	"fmt"
)

type ServerHello struct {
	SerializationVersion  uint8
	CompressionMode       uint16
	ProtocolVersion       uint16
	AuthMechanismSRP      bool
	AuthMechanismFirstSRP bool
}

func (p *ServerHello) GetCommandId() uint16 {
	return ServerCommandHello
}

func (p *ServerHello) MarshalPacket() ([]byte, error) {
	return nil, nil
}

func (p *ServerHello) UnmarshalPacket(payload []byte) error {
	p.SerializationVersion = payload[0]
	p.CompressionMode = binary.BigEndian.Uint16(payload[1:])
	p.ProtocolVersion = binary.BigEndian.Uint16(payload[3:])
	p.AuthMechanismSRP = (payload[8] & 0x02) == 0x02
	p.AuthMechanismFirstSRP = (payload[8] & 0x04) == 0x04
	return nil
}

func (p *ServerHello) String() string {
	return fmt.Sprintf("{ServerHello SerializationVersion=%d, CompressionMode=%d, ProtocolVersion=%d, AuthMechanismSRP=%t, AuthMechanismFirstSRP=%t}",
		p.SerializationVersion, p.CompressionMode, p.ProtocolVersion, p.AuthMechanismSRP, p.AuthMechanismFirstSRP)
}