package sugar

import (
	"fmt"
	"os"
)

var (
	ErrorWriter      = os.Stderr
	ErrorPrefix      = "Error:"
	ErrorFmt         = "%s %+v"
	StandardExitCode = 1

	PanicFunc = func(err error) {
		panic(err)
	}
	ErrorPrintFunc = func(err error) {
		fmt.Fprintf(ErrorWriter, ErrorFmt, ErrorPrefix, err)
	}
	ExitFunc = func(code int) {
		os.Exit(code)
	}
)

// Check takes an error and prints it if it is not nil; but will continue.
func Check(err error) {
	if err != nil {
		ErrorPrintFunc(err)
	}
}

// CheckPanic takes an error and will panic if it is not nil.
func CheckPanic(err error) {
	if err != nil {
		PanicFunc(err)
	}
}

// CheckExit takes an error and will print it and exit if it is not nil.
// If no exit code is provided, the StandardExitCode will be used.
// Any exit codes beyond the first one one provided will be discarded.
func CheckExit(err error, code ...int) {
	if err != nil {
		ErrorPrintFunc(err)
		exitCode := StandardExitCode
		if len(code) > 0 {
			exitCode = code[0]
		}
		ExitFunc(exitCode)
	}
}