package platformsetting

import (
	"context"
	kratoserrors "github.com/go-kratos/kratos/v3/errors"
)

var ErrInvalid = kratoserrors.BadRequest("PLATFORM_SETTING_INVALID", "diamond rate must be between 0.01 and 1.00")

type Setting struct{ DiamondRateCents int64 }
type Repo interface {
	Get(context.Context) (*Setting, error)
	Save(context.Context, *Setting) error
}
type Usecase struct{ repo Repo }

func NewUsecase(repo Repo) *Usecase                           { return &Usecase{repo: repo} }
func (uc *Usecase) Get(ctx context.Context) (*Setting, error) { return uc.repo.Get(ctx) }
func (uc *Usecase) Save(ctx context.Context, v *Setting) error {
	if v == nil || v.DiamondRateCents < 1 || v.DiamondRateCents > 100 {
		return ErrInvalid
	}
	return uc.repo.Save(ctx, v)
}