package errors

import (
	"fmt"
)

// ==================== juju adaptor start ========================

// Trace annotates err with a stack trace at the point WithStack was called.
// If err is nil or already contain stack trace return directly.
func Trace(err error) error {
	return AddStack(err)
}

func Annotate(err error, message string) error {
	if err == nil {
		return nil
	}
	hasStack := HasStack(err)
	err = &withMessage{
		cause:         err,
		msg:           message,
		causeHasStack: hasStack,
	}
	if hasStack {
		return err
	}
	return &withStack{
		err,
		callers(),
	}
}

func Annotatef(err error, format string, args ...interface{}) error {
	if err == nil {
		return nil
	}
	hasStack := HasStack(err)
	err = &withMessage{
		cause:         err,
		msg:           fmt.Sprintf(format, args...),
		causeHasStack: hasStack,
	}
	if hasStack {
		return err
	}
	return &withStack{
		err,
		callers(),
	}
}

// ErrorStack will format a stack trace if it is available, otherwise it will be Error()
func ErrorStack(err error) string {
	if err == nil {
		return ""
	}
	return fmt.Sprintf("%+v", err)
}

// NotFoundf represents an error with not found message.
func NotFoundf(format string, args ...interface{}) error {
	return Errorf(format+" not found", args...)
}

// BadRequestf represents an error with bad request message.
func BadRequestf(format string, args ...interface{}) error {
	return Errorf(format+" bad request", args...)
}

// NotSupportedf represents an error with not supported message.
func NotSupportedf(format string, args ...interface{}) error {
	return Errorf(format+" not supported", args...)
}

// ==================== juju adaptor end ========================