package spool

import (
	"fmt"
	"os"
	"reflect"
	"runtime/debug"
	"strings"
)

var (
	Stderr = os.Stderr
	Stdout = os.Stdout
)

type empty struct{}

const PanicErrorCode = 8

var Print = func(format string, values ...any) (any, error) {
	return fmt.Fprintf(Stdout, format, values...)
}

var Warn = func(format string, values ...any) (any, error) {
	return fmt.Fprintf(Stderr, format, values...)
}

var Panic = func(code ExitCode, format string, values ...any) (any, error) {
	pkg := reflect.TypeOf(empty{}).PkgPath()
	v, err := fmt.Fprintf(Stderr, format, values...)
	st := strings.Split(string(debug.Stack()), "\n")
	for i, l := range st {
		if strings.Contains(l, pkg) {
			st = st[i:]
			break
		}
	}

	_, _ = Warn("%s\n", strings.Join(st, "\n"))
	os.Exit(PanicErrorCode)
	return v, err
}