package merch

import (
	"context"
	"github.com/google/uuid"
)

func (s *service) createMerch(ctx context.Context, userId int64, payload *newMerchDTO) error {
	now := s.utils.TimeNowUTC()
	nullNow := s.utils.NullTimeFromNow(now)
	empty := s.utils.DeletedNullTime()

	merchUuid, err := uuid.NewV7()
	if err != nil {
		logErr(serviceLogHeader, err)
		return err
	}

	newMerch := &Merch{
		CreatedAt: now,
		UpdatedAt: nullNow,
		DeletedAt: empty,
		MerchUuid: merchUuid.String(),
		UserId:    userId,
		Name:      payload.Name,
	}

	var merchExtra []ExtraData
	if payload.Links != nil {

		originsMap, _, err := s.getOriginsMaps(ctx)
		if err != nil {
			logErr(serviceLogHeader, err)
			return err
		}

		for _, item := range payload.Links {
			merchExtra = append(merchExtra, ExtraData{
				CreatedAt: now,
				UpdatedAt: nullNow,
				DeletedAt: empty,
				MerchId:   0,
				OriginId:  originsMap[item.Origin],
				URL:       item.Link,
			})
		}
	}

	return s.repo.createMerch(ctx, newMerch, merchExtra)
}

func (s *service) getMany(ctx context.Context, userId int64) ([]ListResponse, error) {
	allUserMerch, err := s.repo.getMany(ctx, userId)
	if err != nil {
		return nil, err
	}

	if len(allUserMerch) == 0 || allUserMerch == nil {
		logWarn(serviceLogHeader, "User has no merch records")
		return nil, nil
	}

	ids := make([]int64, 0, len(allUserMerch))
	for _, m := range allUserMerch {
		ids = append(ids, m.Id)
	}

	cardLabels, err := s.repo.getManyAttachedLabelsByList(ctx, userId, ids)
	if err != nil {
		return nil, err
	}

	var response []ListResponse
	for _, m := range allUserMerch {
		response = append(response, ListResponse{
			MerchUuid: m.MerchUuid,
			Name:      m.Name,
			Labels:    cardLabels[m.Id],
		})
	}

	return response, nil
}

func (s *service) updateMerch(ctx context.Context, userId int64, payload *updateMerchDTO) (*merchDTO, error) {
	return s.repo.updateMerch(ctx, userId, payload)
}

func (s *service) updateExtraData(ctx context.Context, userId int64, payload *extraDataDTO) (*extraDataDTO, error) {
	merchId, err := s.repo.getMerchIdByUuid(ctx, userId, payload.MerchUuid)
	if err != nil {
		logErr(serviceLogHeader, err)
		return nil, err
	}

	origins, ids, err := s.getOriginsMaps(ctx)
	if err != nil {
		logErr(serviceLogHeader, err)
		return nil, err
	}

	var insertData []ExtraData
	for _, item := range payload.Links {
		if _, ok := origins[item.Origin]; !ok {
			continue
		}

		now := s.utils.TimeNowUTC()

		insertData = append(insertData, ExtraData{
			CreatedAt: now,
			UpdatedAt: s.utils.NullTimeFromNow(now),
			OriginId:  origins[item.Origin],
			URL:       item.Link,
		})
	}

	result, err := s.repo.updateExtraData(ctx, merchId, insertData)
	if err != nil {
		logErr(serviceLogHeader, err)
		return nil, err
	}

	if result == nil || len(result) == 0 {
		return nil, nil
	}

	var ol []originLink
	for _, item := range result {
		ol = append(ol, originLink{
			Origin: ids[item.OriginId],
			Link:   item.URL,
		})
	}

	return &extraDataDTO{
		MerchUuid: payload.MerchUuid,
		Links:     ol,
	}, nil
}

func (s *service) deleteOneMerchRecord(ctx context.Context, userId int64, merchUuid string) error {
	return s.repo.deleteOneMerchRecord(ctx, userId, merchUuid, s.utils.TimeNowUTC())
}