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import { atomFamily } from "jotai-family";
import { atomWithSuspenseQuery } from "jotai-tanstack-query";
import { getEndOfStudyDayBoundary } from "../../shared/date";
import { CardState, db, type LocalDeck } from "../db";
import { localDeckRepository } from "../db/repositories";
import { ensureBootstrap } from "./sync";
export interface Deck {
id: string;
name: string;
description: string | null;
defaultNoteTypeId: string | null;
dueCardCount: number;
newCardCount: number;
totalCardCount: number;
reviewCardCount: number;
createdAt: string;
updatedAt: string;
}
async function loadCurrentUserId(): Promise<string | null> {
const stored = localStorage.getItem("kioku_user");
if (!stored) return null;
try {
const user = JSON.parse(stored) as { id?: string } | null;
return user?.id ?? null;
} catch {
return null;
}
}
interface DeckCardCounts {
dueCardCount: number;
newCardCount: number;
totalCardCount: number;
reviewCardCount: number;
}
async function computeDeckCounts(
deckId: string,
dueBoundary: Date,
): Promise<DeckCardCounts> {
const cards = await db.cards.where("deckId").equals(deckId).toArray();
let due = 0;
let news = 0;
let total = 0;
let review = 0;
for (const card of cards) {
if (card.deletedAt !== null) continue;
total++;
if (card.due < dueBoundary) due++;
if (card.state === CardState.New) news++;
if (card.state === CardState.Review) review++;
}
return {
dueCardCount: due,
newCardCount: news,
totalCardCount: total,
reviewCardCount: review,
};
}
function localDeckToView(deck: LocalDeck, counts: DeckCardCounts): Deck {
return {
id: deck.id,
name: deck.name,
description: deck.description,
defaultNoteTypeId: deck.defaultNoteTypeId,
dueCardCount: counts.dueCardCount,
newCardCount: counts.newCardCount,
totalCardCount: counts.totalCardCount,
reviewCardCount: counts.reviewCardCount,
createdAt: deck.createdAt.toISOString(),
updatedAt: deck.updatedAt.toISOString(),
};
}
async function loadDecksFromIndexedDb(): Promise<Deck[]> {
const userId = await loadCurrentUserId();
if (!userId) return [];
const decks = await localDeckRepository.findByUserId(userId);
const boundary = getEndOfStudyDayBoundary(new Date());
decks.sort((a, b) => a.createdAt.getTime() - b.createdAt.getTime());
return Promise.all(
decks.map(async (deck) => {
const counts = await computeDeckCounts(deck.id, boundary);
return localDeckToView(deck, counts);
}),
);
}
// =====================
// Decks List - Suspense-compatible, IndexedDB-first
// =====================
export const decksAtom = atomWithSuspenseQuery(() => ({
queryKey: ["decks"],
queryFn: async (): Promise<Deck[]> => {
const decks = await loadDecksFromIndexedDb();
if (decks.length > 0) {
// Stale-while-revalidate: kick a background pull so the next
// invalidation reflects upstream changes.
ensureBootstrap();
return decks;
}
// IndexedDB is empty — wait for the initial pull to populate it
// before deciding there really are no decks.
await ensureBootstrap();
return loadDecksFromIndexedDb();
},
}));
// =====================
// Single Deck by ID - Suspense-compatible, IndexedDB-first
// =====================
async function loadDeckById(deckId: string): Promise<Deck | null> {
const deck = await localDeckRepository.findById(deckId);
if (!deck || deck.deletedAt !== null) return null;
const boundary = getEndOfStudyDayBoundary(new Date());
const counts = await computeDeckCounts(deck.id, boundary);
return localDeckToView(deck, counts);
}
export const deckByIdAtomFamily = atomFamily((deckId: string) =>
atomWithSuspenseQuery(() => ({
queryKey: ["decks", deckId],
queryFn: async (): Promise<Deck> => {
let deck = await loadDeckById(deckId);
if (deck) {
ensureBootstrap();
return deck;
}
await ensureBootstrap();
deck = await loadDeckById(deckId);
if (!deck) {
throw new Error(`Deck not found: ${deckId}`);
}
return deck;
},
})),
);
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