"use strict";
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var __importStar = (this && this.__importStar) || (function () {
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Object.defineProperty(exports, "__esModule", { value: true });
exports.createDateMatchOnMutualLove = void 0;
const functions = __importStar(require("firebase-functions"));
const admin = __importStar(require("firebase-admin"));
const LOVE = 'love';
/**
 * Creates a revealed date match when both partners have swiped LOVE on the
 * same date idea.
 *
 * Trigger: couples/{coupleId}/date_swipes/{dateIdeaId} (onWrite)
 *
 * The `date_matches` collection is server-write-only — Firestore rules deny all
 * client writes (`allow create, update, delete: if false`). This trigger is
 * therefore the single source of truth for match creation. The client only
 * records swipes and observes `date_matches` for the result.
 *
 * Idempotency: the match document id is the date idea id and creation runs in a
 * transaction, so repeated swipes on the same idea and concurrent invocations
 * never produce a duplicate match.
 */
exports.createDateMatchOnMutualLove = functions.firestore
    .document('couples/{coupleId}/date_swipes/{dateIdeaId}')
    .onWrite(async (change, context) => {
    var _a;
    const after = change.after.data();
    if (!after)
        return; // swipe document was deleted
    const actions = ((_a = after.actions) !== null && _a !== void 0 ? _a : {});
    const lovedBy = Object.entries(actions)
        .filter(([, entry]) => (entry === null || entry === void 0 ? void 0 : entry.action) === LOVE)
        .map(([uid]) => uid)
        .sort();
    // A match needs both partners to have loved the same idea.
    if (lovedBy.length < 2)
        return;
    const { coupleId, dateIdeaId } = context.params;
    const db = admin.firestore();
    const matchRef = db
        .collection('couples')
        .doc(coupleId)
        .collection('date_matches')
        .doc(dateIdeaId);
    await db.runTransaction(async (tx) => {
        const existing = await tx.get(matchRef);
        if (existing.exists)
            return; // already matched — no-op
        tx.set(matchRef, {
            dateIdeaId,
            matchedBy: lovedBy,
            revealedAt: admin.firestore.FieldValue.serverTimestamp(),
        });
    });
});
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