package model

// Plan-default save limits (-1 = unlimited). Per-user override columns on the
// users row take precedence when non-nil; admins set them from the panel.
const (
	planPremium = "premium"

	defaultFreeBookmarkLimit    = 1
	defaultPremiumBookmarkLimit = 5
	defaultFreeCollectionLimit  = 5 // per visibility; premium = unlimited
)

// UserLimits are the effective per-resource caps in force for a user (-1 means
// unlimited). Surfaced on the self user payload so the app can render
// "X / Y used" and gate create actions without hardcoding the numbers.
type UserLimits struct {
	Bookmarks          int `json:"bookmarks"`
	PublicCollections  int `json:"public_collections"`
	PrivateCollections int `json:"private_collections"`
}

// ResolveLimits computes the effective caps from a plan plus optional per-user
// overrides (nil = use the plan default). Shared by the self payload and the
// admin user listing so both agree on what's in force.
func ResolveLimits(plan string, bookmark, publicCollection, privateCollection *int) UserLimits {
	premium := plan == planPremium

	bm := defaultFreeBookmarkLimit
	if premium {
		bm = defaultPremiumBookmarkLimit
	}
	pub, priv := defaultFreeCollectionLimit, defaultFreeCollectionLimit
	if premium {
		pub, priv = -1, -1
	}
	if bookmark != nil {
		bm = *bookmark
	}
	if publicCollection != nil {
		pub = *publicCollection
	}
	if privateCollection != nil {
		priv = *privateCollection
	}
	return UserLimits{Bookmarks: bm, PublicCollections: pub, PrivateCollections: priv}
}

// EffectiveLimits resolves this user's caps (plan default + any overrides).
func (u *User) EffectiveLimits() UserLimits {
	return ResolveLimits(u.Plan, u.BookmarkLimit, u.PublicCollectionLimit, u.PrivateCollectionLimit)
}