package plugin

import (
	"fmt"

	"github.com/evcc-io/evcc/util"
)

type errorPlugin struct {
	*getter
	err error
}

func init() {
	registry.Add("error", NewErrorFromConfig)
}

// NewErrorFromConfig creates error provider
func NewErrorFromConfig(other map[string]any) (Plugin, error) {
	var cc struct {
		Error string
	}

	if err := util.DecodeOther(other, &cc); err != nil {
		return nil, err
	}

	err := knownErrors([]byte(cc.Error))
	if err == nil {
		return nil, fmt.Errorf("unknown error: %s", cc.Error)
	}

	o := &errorPlugin{
		err: err,
	}
	o.getter = defaultGetters(o, 1)

	return o, nil
}

var _ StringGetter = (*errorPlugin)(nil)

func (o *errorPlugin) StringGetter() (func() (string, error), error) {
	return func() (string, error) {
		return "", o.err
	}, nil
}

var _ IntSetter = (*errorPlugin)(nil)

func (o *errorPlugin) IntSetter(param string) (func(int64) error, error) {
	return func(int64) error {
		return o.err
	}, nil
}