package go_zrfu

import (
	"fmt"
)

var errBehaviorMap map[uint32]string = map[uint32]string{
	0x0001: "NullPointerOfHandle",
	0x0002: "NullHandle",
	0x0003: "InvalidHandle",
	0x0004: "StaleVersionHandle",
	0x0005: "HandleIndexPastEnd",
	0x0006: "HandleMapWrong",
	0x0007: "NullBufferPtr",
	0x0008: "IOError",
	0x0009: "CBORDecodeError",
	0x000A: "ProcNotFound",
	0x000B: "ProcRegistryNameError",
	0x000C: "ProcCallerNotInit",
	0x000D: "ProcCallerRepeatlyInit",
	0x000E: "ArgsCBORDecodeError",
	0x000F: "ReturnCBOREncodeError",
	0x0010: "NoDataToEncodeCBOR",
	0x0011: "NoArgsNeed",
	0x0012: "NoReturnProvided",
	0x0013: "CanNotGetArgs",
}

var errPrefixMap map[uint32]string = map[uint32]string{
	0x0000_0000: "generic",
	0x0001_0000: "BytesVec",
	0x0002_0000: "ProcCaller",
	0x0101_0000: "ProcCallBasic",
	0x0102_0000: "ProcCallInput",
	0x0103_0000: "ProcCallReturn",
	0x0201_0000: "ProcCalling",
}

func CheckRetVal(retcode int32) error {
	if retcode >= 0 {
		return nil
	}
	ecode := uint32(-retcode)
	beh := ecode & 0x0000FFFF
	prefix := ecode & 0xFFFF0000
	v1, ok := errPrefixMap[prefix]
	var ps string
	if ok {
		ps = v1
	} else {
		ps = "Unknown"
	}
	var bhs string
	v2, ok := errBehaviorMap[beh]
	if ok {
		bhs = v2
	} else {
		bhs = "Unknown"
	}
	return fmt.Errorf("zrfu calling error: %s.%s", ps, bhs)
}