package article

const (
	StatusOnline = "online"
	StatusDraft  = "draft"
)

type SortField string

type SortDirection string

const (
	SortByTitle     SortField = "title"
	SortByStatus    SortField = "status"
	SortByCreatedAt SortField = "created_at"
	SortByUpdatedAt SortField = "updated_at"
	SortByID        SortField = "id"

	SortAsc  SortDirection = "asc"
	SortDesc SortDirection = "desc"
)

type Sort struct {
	Field     SortField
	Direction SortDirection
}

func DefaultSort() Sort {
	return Sort{Field: SortByUpdatedAt, Direction: SortDesc}
}

type Filters struct {
	IsOnline *bool
	SiteID   *uint32
	Page     int
	Size     int
	Q        string
	Status   string
	Sort     Sort
	Unpaged  bool
}

type Nullable[T any] struct {
	Set   bool
	Value *T
}

type Update struct {
	Body              *string
	SiteID            *uint32
	AuthorIDs         *[]uint32
	Slug              *string
	Excerpt           *string
	SEOTitle          *string
	SEODescription    *string
	CoverImageID      Nullable[uint32]
	CoverImageAlt     *string
	SocialTitle       *string
	SocialDescription *string
	SocialImageID     Nullable[uint32]
	CanonicalURL      *string
	Noindex           *bool
	SEODismissed      *[]string
}

type ImageReferences struct {
	Cover  []uint32
	Social []uint32
}

func (r ImageReferences) Empty() bool {
	return len(r.Cover) == 0 && len(r.Social) == 0
}

type Counts struct {
	All    int `json:"all"`
	Online int `json:"online"`
	Draft  int `json:"draft"`
}

type PageResult struct {
	Items []Article
	Total int
}

type Repository interface {
	FindByFilters(filters Filters) ([]Article, error)
	FindPage(filters Filters) (PageResult, error)
	CountByVisibility(onlineOnly bool) (Counts, error)
	Get(id uint32) (Article, error)
	GetByName(name string) (Article, error)
	GetAll() []Article
	Create(post Article) (Article, error)
	UpdateBody(id uint32, body string) (Article, error)
	Update(id uint32, update Update) (Article, error)
	UpdateIsOnline(id uint32, isOnline bool) (Article, error)
	Delete(id uint32) error
	FindByBodyContaining(filename string) ([]Article, error)
	FindByImage(imageID uint32) ([]Article, error)
	SlugTaken(siteID uint32, slug string, exceptID uint32) (bool, error)
	ClearImage(imageID uint32) (ImageReferences, error)
	RestoreImage(references ImageReferences, imageID uint32) error
	RepointImage(fromImageIDs []uint32, toImageID uint32) ([]uint32, error)
}