package business

import (
	"context"
	"time"

	"kra/internal/biz/business"
	"kra/internal/service/dto"
)

type OtherSettingsUsecase interface {
	Get(context.Context) (*business.OtherSettings, error)
	Save(context.Context, business.OtherSettings) (*business.OtherSettings, error)
}

type OtherSettingsService struct{ uc OtherSettingsUsecase }

func NewOtherSettingsService(uc *business.OtherSettingsUsecase) *OtherSettingsService {
	return &OtherSettingsService{uc: uc}
}

func otherSettingsResponse(value *business.OtherSettings) *dto.OtherSettingsResponse {
	defaults := business.DefaultOtherSettings()
	result := &dto.OtherSettingsResponse{OtherSettingsValues: dto.OtherSettingsValues{Amount: value.Amount, Days: value.Days}, Defaults: dto.OtherSettingsValues{Amount: defaults.Amount, Days: defaults.Days}}
	if !value.UpdatedAt.IsZero() {
		result.UpdatedAt = value.UpdatedAt.Format(time.RFC3339)
	}
	return result
}

func (s *OtherSettingsService) Get(ctx context.Context) (*dto.OtherSettingsResponse, error) {
	value, err := s.uc.Get(ctx)
	if err != nil {
		return nil, err
	}
	return otherSettingsResponse(value), nil
}

func (s *OtherSettingsService) Save(ctx context.Context, req *dto.OtherSettingsRequest) (*dto.OtherSettingsResponse, error) {
	if req == nil || req.Amount == nil || req.Days == nil {
		return nil, business.ErrOtherSettingsInput
	}
	value := business.OtherSettings{Amount: *req.Amount, Days: *req.Days}
	if err := business.ValidateOtherSettings(value); err != nil {
		return nil, err
	}
	saved, err := s.uc.Save(ctx, value)
	if err != nil {
		return nil, err
	}
	return otherSettingsResponse(saved), nil
}