package zerr

import (
	"log/slog"
	"reflect"
)

type errorValuer struct {
	error
}

func (ev errorValuer) LogValue() slog.Value {
	if ev.error == nil {
		return slog.AnyValue(nil)
	}
	if lv, ok := ev.error.(slog.LogValuer); ok {
		return lv.LogValue()
	}
	if unwrap, ok := ev.error.(interface{ Unwrap() []error }); ok {
		return (&Err{errs: unwrap.Unwrap()}).LogValue()
	}
	attrs := make([]slog.Attr, 0, 3)
	typ := reflect.TypeOf(ev.error).String()
	attrs = append(attrs, slog.String("type", typ))
	attrs = append(attrs, slog.String("error", ev.error.Error()))
	if typ == "*errors.errorString" {
		return slog.GroupValue(attrs...)
	}
	attrs = append(attrs, slog.Any("details", ev.error))
	return slog.GroupValue(attrs...)
}