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import type { Database } from "@/lib/db";
import { ItemRepository } from "@/server/repositories/implementations/ItemRepository";
import { PhotoRepository } from "@/server/repositories/implementations/PhotoRepository";
import { AuditLogRepository } from "@/server/repositories/implementations/AuditLogRepository";
import { withTransaction } from "@/lib/transactions";
import { MAX_GROUP_PHOTOS, POOL_CAP_MESSAGE } from "@/lib/pool-limits";
// Re-exported so existing call sites (API routes) keep importing the cap from
// here — the number itself lives in the shared client-safe module.
export { MAX_GROUP_PHOTOS };
export type ReassignDest =
| { type: "item"; itemId: string }
| { type: "new" }
| { type: "pool" };
export class PoolGroupError extends Error {
constructor(
public readonly code: "empty" | "too_many" | "conflict",
message: string,
) {
super(message);
this.name = "PoolGroupError";
}
}
export class ItemService {
constructor(
private repo: ItemRepository,
private photoRepo: PhotoRepository,
) {}
static fromDb(db: Database): ItemService {
return new ItemService(new ItemRepository(db), new PhotoRepository(db));
}
// Make one item from selected pooled photos: pre-validate availability, then
// create the (nameless, catalog-numbered) item and assign the photos with the
// first as hero. The create→assign path is deliberately non-transactional, so we pre-check
// availability before any write — a conflict must leave the pool untouched —
// and keep the assign guard as a race backstop that compensates the item.
async createItemFromPool(collectionId: string, photoIds: string[]): Promise<Item> {
const ids = [...new Set(photoIds)];
if (ids.length === 0) {
throw new PoolGroupError("empty", "Choose at least one photo to make an item.");
}
if (ids.length > MAX_GROUP_PHOTOS) {
throw new PoolGroupError("too_many", POOL_CAP_MESSAGE);
}
// Pre-validate availability BEFORE creating or assigning anything, so a
// conflict leaves the pool untouched — no orphan item, no half-assigned
// photos — partial failure leaves at worst a harmless empty item; this check
// plus the assign guard below keep conflicts clean (a transaction would also
// work but isn't used here).
const available = await this.photoRepo.countAvailablePooled(collectionId, ids);
if (available !== ids.length) {
throw new PoolGroupError(
"conflict",
"Some of those photos aren't available to group anymore — try again.",
);
}
const item = await this.repo.create({ collectionId });
const assigned = await this.photoRepo.assignPooledPhotosToItem(
collectionId,
ids,
item.id,
ids[0],
);
if (assigned !== ids.length) {
// Lost a race between the check and the assign (rare). Return any photos
// that did get assigned to the pool, then remove the empty item — a
// conflict leaves neither an orphan item nor an orphaned photo.
await this.photoRepo.unassignAllFromItem(item.id);
await this.repo.softDelete(item.id);
throw new PoolGroupError(
"conflict",
"Some of those photos aren't available to group anymore — try again.",
);
}
return item;
}
// Make one item PER photo: a bulk fast-path where N selected photos become N
// items, each with its single photo as hero. Mirrors createItemFromPool's
// validation and pre-check discipline — a conflict touches nothing — but loops
// create+assign per photo. All-or-nothing: if any photo loses a race, every
// item made this call is rolled back so success always means all were made.
async createItemsFromPoolEach(collectionId: string, photoIds: string[]): Promise<Item[]> {
const ids = [...new Set(photoIds)];
if (ids.length === 0) {
throw new PoolGroupError("empty", "Choose at least one photo to make items.");
}
if (ids.length > MAX_GROUP_PHOTOS) {
throw new PoolGroupError("too_many", `You can make up to ${MAX_GROUP_PHOTOS} items at once.`);
}
// Pre-validate availability up front so a conflict touches nothing.
const available = await this.photoRepo.countAvailablePooled(collectionId, ids);
if (available !== ids.length) {
throw new PoolGroupError(
"conflict",
"Some of those photos aren't available to group anymore — try again.",
);
}
const created: Item[] = [];
for (const id of ids) {
const item = await this.repo.create({ collectionId });
const assigned = await this.photoRepo.assignPooledPhotosToItem(collectionId, [id], item.id, id);
if (assigned !== 1) {
// Lost a race for this photo — roll back everything made this call so the
// action is all-or-nothing (no orphan items, no photos vanishing from the
// pool view, consistent with the combine path).
await this.photoRepo.unassignAllFromItem(item.id);
await this.repo.softDelete(item.id);
for (const made of created) {
await this.photoRepo.unassignAllFromItem(made.id);
await this.repo.softDelete(made.id);
}
throw new PoolGroupError(
"conflict",
"Some of those photos aren't available to group anymore — try again.",
);
}
created.push(item);
}
return created;
}
// Unified "Move to…": move/split/return-to-pool are all reassigning photos'
// item_id. Reconciles hero on every affected item (a source whose hero moved
// away, or a heroless target) so display stays coherent. This path is
// deliberately non-transactional; findByIds pre-validates so a conflict touches nothing.
async reassignPhotos(
collectionId: string,
photoIds: string[],
dest: ReassignDest,
): Promise<{ number: number | null }> {
const ids = [...new Set(photoIds)];
if (ids.length === 0) {
throw new PoolGroupError("empty", "Choose at least one photo to move.");
}
if (ids.length > MAX_GROUP_PHOTOS) {
throw new PoolGroupError("too_many", `You can move up to ${MAX_GROUP_PHOTOS} photos at once.`);
}
const photos = await this.photoRepo.findByIds(collectionId, ids);
if (photos.length !== ids.length) {
throw new PoolGroupError("conflict", "Some of those photos aren't available to move anymore — try again.");
}
let targetItemId: string | null;
let heroPhotoId: string | null;
let resultNumber: number | null;
if (dest.type === "item") {
const target = await this.repo.findById(dest.itemId);
if (!target || target.collectionId !== collectionId) {
throw new PoolGroupError("conflict", "That item isn't available anymore — try again.");
}
targetItemId = target.id;
heroPhotoId = null; // target keeps its own hero
resultNumber = target.number;
} else if (dest.type === "new") {
const created = await this.repo.create({ collectionId });
targetItemId = created.id;
heroPhotoId = ids[0];
resultNumber = created.number;
} else {
targetItemId = null;
heroPhotoId = null;
resultNumber = null;
}
const sourceItemIds = [
...new Set(
photos
.map((p) => p.itemId)
.filter((id): id is string => !!id && id !== targetItemId),
),
];
await this.photoRepo.reassignPhotos(collectionId, ids, targetItemId, heroPhotoId);
// Reconcile hero on every affected item (sources + an existing-item target):
// if it has photos but none is hero, promote its first remaining photo.
const affected = targetItemId && dest.type === "item"
? [...sourceItemIds, targetItemId]
: sourceItemIds;
for (const itemId of affected) {
const remaining = await this.photoRepo.findByItem(itemId);
if (remaining.length > 0 && !remaining.some((p) => p.isHero)) {
await this.photoRepo.setHero(remaining[0].id, itemId);
}
}
return { number: resultNumber };
}
async createItem(
collectionId: string,
data: {
name?: string | null;
brand?: string;
style?: string;
color?: string;
material?: string;
category?: string;
status?: string;
notes?: string;
},
): Promise<Item> {
return this.repo.create({ collectionId, ...data });
}
async getItem(itemId: string): Promise<Item | null> {
return this.repo.findById(itemId);
}
async getCollectionItems(collectionId: string): Promise<Item[]> {
return this.repo.findByCollection(collectionId);
}
async updateItem(itemId: string, data: Partial<Item>): Promise<Item> {
return this.repo.update(itemId, {
...data,
updatedAt: new Date(),
});
}
async deleteItem(itemId: string): Promise<Item> {
return this.repo.softDelete(itemId);
}
async restoreItem(itemId: string): Promise<Item> {
return this.repo.update(itemId, {
deletedAt: null,
updatedAt: new Date(),
});
}
}
/** Thin service that owns the soft-delete+audit transaction for a single item. */
export class ItemSoftDeleteService {
constructor(private db: Database) {}
static fromDb(db: Database): ItemSoftDeleteService {
return new ItemSoftDeleteService(db);
}
async softDeleteWithAudit(item: Item, actorId: string): Promise<Item> {
return withTransaction(this.db, async (tx) => {
const row = await new ItemRepository(tx).softDelete(item.id);
await new AuditLogRepository(tx).record({
actorId,
action: "item.delete",
targetType: "item",
targetId: item.id,
collectionId: item.collectionId,
});
return row;
});
}
}
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