package err

import (
	"fmt"
	"log"
	"os"
)

type LogOption func(string)

type ErrorCallback struct {
	Error error
}

func If(err error) *ErrorCallback {
	return &ErrorCallback{err}
}

func (err *ErrorCallback) ThenIf(f func() error) *ErrorCallback {
	if err.Error == nil {
		err.Error = f()
	}
	return err
}

func (err *ErrorCallback) Then(f func()) *ErrorCallback {
	if err.Error == nil {
		f()
	}
	return err
}

func (err *ErrorCallback) End() error {
	return err.Error
}

func Panic(err error) bool {
	if err != nil {
		log.Panic(err)
		return true
	}
	return false
}

func LogIf(err error, opts ...LogOption) bool {
	if err != nil {
		for _, opt := range opts {
			opt(err.Error())
		}
		log.Println(err.Error())
		return true
	}
	return false
}

func Log(msg string, opts ...LogOption) {
	for _, opt := range opts {
		opt(msg)
	}
	log.Println(msg)
}

func ExitIf(err error, msg string) {
	if err != nil {
		fmt.Fprintln(os.Stderr, msg, "Error:", err.Error())
		os.Exit(1)
	}
}