package opcodes

// Constants for opcode management
const (
	MAX_EQ_OPCODE     = 0xFFFF
	APP_OPCODE_SIZE_1 = 1
	APP_OPCODE_SIZE_2 = 2
)

// Opcode type definitions
type (
	ProtocolOpcode uint8
	ServerOpcode   uint16
	AppOpcode      uint16
	EmuOpcode      uint16
)

// Quick lookup maps for efficient opcode translation
var (
	ProtocolOpcodeNames = map[ProtocolOpcode]string{
		OP_SessionRequest:      "OP_SessionRequest",
		OP_SessionResponse:     "OP_SessionResponse",
		OP_Combined:            "OP_Combined",
		OP_SessionDisconnect:   "OP_SessionDisconnect",
		OP_KeepAlive:           "OP_KeepAlive",
		OP_ServerKeyRequest:    "OP_ServerKeyRequest",
		OP_SessionStatResponse: "OP_SessionStatResponse",
		OP_Packet:              "OP_Packet",
		OP_Fragment:            "OP_Fragment",
		OP_OutOfOrderAck:       "OP_OutOfOrderAck",
		OP_Ack:                 "OP_Ack",
		OP_AppCombined:         "OP_AppCombined",
		OP_OutOfSession:        "OP_OutOfSession",
	}

	ServerOpcodeNames = map[ServerOpcode]string{
		ServerOP_KeepAlive:      "ServerOP_KeepAlive",
		ServerOP_ChannelMessage: "ServerOP_ChannelMessage",
		ServerOP_SetZone:        "ServerOP_SetZone",
		ServerOP_ShutdownAll:    "ServerOP_ShutdownAll",
		// Add more as needed for performance-critical lookups
	}
)

// Helper functions for efficient opcode operations
func IsProtocolOpcode(op uint8) bool {
	_, exists := ProtocolOpcodeNames[ProtocolOpcode(op)]
	return exists
}

func IsServerOpcode(op uint16) bool {
	return op >= 0x0001 && op <= 0xFFFF
}

func GetProtocolOpcodeName(op ProtocolOpcode) string {
	if name, exists := ProtocolOpcodeNames[op]; exists {
		return name
	}
	return "OP_Unknown"
}

func GetServerOpcodeName(op ServerOpcode) string {
	if name, exists := ServerOpcodeNames[op]; exists {
		return name
	}
	return "ServerOP_Unknown"
}