import {Realm} from "realm";
import {createRealmContext} from "@realm/react";

import {AMServer} from "./AMServer";
import {AMCardRecentUse} from "./AMCardRecentUse";
import {AMCard, AMPhysicalCardData} from "./AMCard";

const migrationFunction = (oldRealm: Realm, newRealm: Realm) => {
    if (oldRealm.schemaVersion < 5) {
        const oldCards = oldRealm.objects("card");
        const gameIdMap: Map<string, { card: any, lastUsed: Date }> = new Map();

        // get last used card for each game
        oldCards.forEach((card: any) => {
            if (card.lastUsedGameId && card.lastUsed) {
                const existing = gameIdMap.get(card.lastUsedGameId);
                if (!existing || card.lastUsed > existing.lastUsed) {
                    gameIdMap.set(card.lastUsedGameId, { card, lastUsed: card.lastUsed });
                }
            }
        });

        // write new history records
        const newCards = newRealm.objects("card");
        newRealm.write(() => {
            gameIdMap.forEach((value, gameId) => {
                const newCard = newCards.filtered(`_id == $0`, value.card._id)[0];
                newRealm.create("cardUsageHistory", {
                    gameId: gameId,
                    card: newCard
                });
            });
        });
    }
};

// @ts-ignore
export default createRealmContext({
    schemaVersion: 5,
    schema: [AMPhysicalCardData, AMCardRecentUse, AMCard, AMServer],
    onMigration: migrationFunction,
    deleteRealmIfMigrationNeeded: false,
});