package eq2net

import (
	"fmt"
)

// LoginEmuOpcode represents emulator opcodes for the login server
type LoginEmuOpcode uint16

// Login server emulator opcodes
const (
	LOP_Unknown LoginEmuOpcode = iota
	LOP_LoginRequestMsg
	LOP_LoginByNumRequestMsg
	LOP_WSLoginRequestMsg
	LOP_ESLoginRequestMsg
	LOP_LoginReplyMsg
	LOP_WorldListMsg
	LOP_WorldStatusChangeMsg
	LOP_AllWSDescRequestMsg
	LOP_WSStatusReplyMsg
	LOP_AllCharactersDescRequestMsg
	LOP_AllCharactersDescReplyMsg
	LOP_CreateCharacterRequestMsg
	LOP_ReskinCharacterRequestMsg
	LOP_CreateCharacterReplyMsg
	LOP_WSCreateCharacterRequestMsg
	LOP_WSCreateCharacterReplyMsg
	LOP_DeleteCharacterRequestMsg
	LOP_DeleteCharacterReplyMsg
	LOP_PlayCharacterRequestMsg
	LOP_PlayCharacterReplyMsg
	LOP_ServerPlayCharacterRequestMsg
	LOP_ServerPlayCharacterReplyMsg
	LOP_KeymapLoadMsg
	LOP_KeymapNoneMsg
	LOP_KeymapDataMsg
	LOP_KeymapSaveMsg
	LOP_LSCheckAcctLockMsg
	LOP_WSAcctLockStatusMsg
	LOP_LsRequestClientCrashLogMsg
	LOP_LsClientBaselogReplyMsg
	LOP_LsClientCrashlogReplyMsg
	LOP_LsClientAlertlogReplyMsg
	LOP_LsClientVerifylogReplyMsg
	LOP_BadLanguageFilter
	LOP_WSServerLockMsg
	LOP_WSServerHideMsg
	LOP_LSServerLockMsg
	LOP_UpdateCharacterSheetMsg
	LOP_UpdateInventoryMsg
	LOP_MaxLoginOpcode
)

// LoginPacket represents a login server packet
type LoginPacket struct {
	EQPacket // Embed base packet
	LoginEmuOpcode LoginEmuOpcode // Login server emulator opcode
}

// NewLoginPacket creates a new login server packet
func NewLoginPacket(opcode LoginEmuOpcode, data []byte) *LoginPacket {
	base := NewEQPacket(uint16(opcode), data)
	base.EmuOpcode = uint16(opcode)
	base.OpcodeSize = 1 // Login server uses 1-byte opcodes
	
	p := &LoginPacket{
		EQPacket:       *base,
		LoginEmuOpcode: opcode,
	}
	return p
}

// ParseLoginPacket creates a login packet from raw data
func ParseLoginPacket(data []byte) (*LoginPacket, error) {
	if len(data) < 1 {
		return nil, fmt.Errorf("packet too small for login opcode")
	}

	// Extract 1-byte opcode
	opcode := LoginEmuOpcode(data[0])
	
	// Create packet with remaining data
	base := NewEQPacket(uint16(opcode), data[1:])
	base.EmuOpcode = uint16(opcode)
	base.OpcodeSize = 1
	
	p := &LoginPacket{
		EQPacket:       *base,
		LoginEmuOpcode: opcode,
	}
	
	return p, nil
}

// GetLoginOpcode returns the login emulator opcode
func (p *LoginPacket) GetLoginOpcode() LoginEmuOpcode {
	return p.LoginEmuOpcode
}

// SetLoginOpcode sets the login emulator opcode
func (p *LoginPacket) SetLoginOpcode(opcode LoginEmuOpcode) {
	p.LoginEmuOpcode = opcode
	p.EmuOpcode = uint16(opcode)
	p.Opcode = uint16(opcode)
}

// SerializeLogin serializes the login packet with proper encoding
func (p *LoginPacket) SerializeLogin() []byte {
	// Login packets use 1-byte opcodes
	buf := make([]byte, 1+len(p.Buffer))
	buf[0] = byte(p.LoginEmuOpcode)
	
	if len(p.Buffer) > 0 {
		copy(buf[1:], p.Buffer)
	}
	
	return buf
}

// GetLoginOpcodeName returns the string name of a login emulator opcode
func GetLoginOpcodeName(opcode LoginEmuOpcode) string {
	switch opcode {
	case LOP_Unknown:
		return "LOP_Unknown"
	case LOP_LoginRequestMsg:
		return "LOP_LoginRequestMsg"
	case LOP_LoginByNumRequestMsg:
		return "LOP_LoginByNumRequestMsg"
	case LOP_WSLoginRequestMsg:
		return "LOP_WSLoginRequestMsg"
	case LOP_ESLoginRequestMsg:
		return "LOP_ESLoginRequestMsg"
	case LOP_LoginReplyMsg:
		return "LOP_LoginReplyMsg"
	case LOP_WorldListMsg:
		return "LOP_WorldListMsg"
	case LOP_WorldStatusChangeMsg:
		return "LOP_WorldStatusChangeMsg"
	case LOP_AllWSDescRequestMsg:
		return "LOP_AllWSDescRequestMsg"
	case LOP_WSStatusReplyMsg:
		return "LOP_WSStatusReplyMsg"
	case LOP_AllCharactersDescRequestMsg:
		return "LOP_AllCharactersDescRequestMsg"
	case LOP_AllCharactersDescReplyMsg:
		return "LOP_AllCharactersDescReplyMsg"
	case LOP_CreateCharacterRequestMsg:
		return "LOP_CreateCharacterRequestMsg"
	case LOP_ReskinCharacterRequestMsg:
		return "LOP_ReskinCharacterRequestMsg"
	case LOP_CreateCharacterReplyMsg:
		return "LOP_CreateCharacterReplyMsg"
	case LOP_WSCreateCharacterRequestMsg:
		return "LOP_WSCreateCharacterRequestMsg"
	case LOP_WSCreateCharacterReplyMsg:
		return "LOP_WSCreateCharacterReplyMsg"
	case LOP_DeleteCharacterRequestMsg:
		return "LOP_DeleteCharacterRequestMsg"
	case LOP_DeleteCharacterReplyMsg:
		return "LOP_DeleteCharacterReplyMsg"
	case LOP_PlayCharacterRequestMsg:
		return "LOP_PlayCharacterRequestMsg"
	case LOP_PlayCharacterReplyMsg:
		return "LOP_PlayCharacterReplyMsg"
	case LOP_ServerPlayCharacterRequestMsg:
		return "LOP_ServerPlayCharacterRequestMsg"
	case LOP_ServerPlayCharacterReplyMsg:
		return "LOP_ServerPlayCharacterReplyMsg"
	case LOP_KeymapLoadMsg:
		return "LOP_KeymapLoadMsg"
	case LOP_KeymapNoneMsg:
		return "LOP_KeymapNoneMsg"
	case LOP_KeymapDataMsg:
		return "LOP_KeymapDataMsg"
	case LOP_KeymapSaveMsg:
		return "LOP_KeymapSaveMsg"
	case LOP_LSCheckAcctLockMsg:
		return "LOP_LSCheckAcctLockMsg"
	case LOP_WSAcctLockStatusMsg:
		return "LOP_WSAcctLockStatusMsg"
	case LOP_LsRequestClientCrashLogMsg:
		return "LOP_LsRequestClientCrashLogMsg"
	case LOP_LsClientBaselogReplyMsg:
		return "LOP_LsClientBaselogReplyMsg"
	case LOP_LsClientCrashlogReplyMsg:
		return "LOP_LsClientCrashlogReplyMsg"
	case LOP_LsClientAlertlogReplyMsg:
		return "LOP_LsClientAlertlogReplyMsg"
	case LOP_LsClientVerifylogReplyMsg:
		return "LOP_LsClientVerifylogReplyMsg"
	case LOP_BadLanguageFilter:
		return "LOP_BadLanguageFilter"
	case LOP_WSServerLockMsg:
		return "LOP_WSServerLockMsg"
	case LOP_WSServerHideMsg:
		return "LOP_WSServerHideMsg"
	case LOP_LSServerLockMsg:
		return "LOP_LSServerLockMsg"
	case LOP_UpdateCharacterSheetMsg:
		return "LOP_UpdateCharacterSheetMsg"
	case LOP_UpdateInventoryMsg:
		return "LOP_UpdateInventoryMsg"
	default:
		return fmt.Sprintf("Unknown(%d)", opcode)
	}
}

// ConvertToProtocolPacket wraps this login packet in a protocol packet
func (p *LoginPacket) ConvertToProtocolPacket() *ProtocolPacket {
	// Serialize the login packet
	loginData := p.SerializeLogin()
	
	// Create protocol packet with OP_Packet opcode
	proto := NewProtocolPacket(OP_Packet, loginData)
	
	// Copy network info
	proto.SrcIP = p.SrcIP
	proto.SrcPort = p.SrcPort
	proto.DstIP = p.DstIP
	proto.DstPort = p.DstPort
	proto.Timestamp = p.Timestamp
	proto.Version = p.Version
	
	return proto
}

// Copy creates a deep copy of the login packet
func (p *LoginPacket) Copy() *LoginPacket {
	newPacket := &LoginPacket{
		EQPacket:       *p.Clone(),
		LoginEmuOpcode: p.LoginEmuOpcode,
	}
	return newPacket
}