import { AnkiConnect, IAnkiConnectActions } from '@/ankiconnect';

import { makeKanjiLevels } from './get-kanji-level';

const DECK = 'Takoboto';
const KANJI_FIELD = 'Japanese';
/**
 * Whether to use Level > 60, i.e. outside WaniKani
 *
 * @link https://community.wanikani.com/t/fake-levels-61-70-or-%E7%84%A1%E9%99%90-infinity/16399
 */
const USE_BEYOND = true;

async function main() {
  const anki = new AnkiConnect();

  const deckConfig = await anki.api('getDeckConfig', {
    deck: DECK,
  });

  const deckQuery = `deck:${DECK} -deck:${DECK}::*`;
  const kanjiLevels = await makeKanjiLevels({ useBeyond: USE_BEYOND });

  await anki
    .api('findCards', {
      query: deckQuery,
    })
    .then((cards) => anki.api('cardsInfo', { cards }))
    .then(async (rs) => {
      const modelToSubdecks = new Map<
        string,
        {
          [subdeck: string]: number[];
        }
      >();
      rs.map((r) => {
        const vs = modelToSubdecks.get(r.modelName) || {};
        const { value } = r.fields[KANJI_FIELD] || {};
        if (value) {
          // Get the subdeck names from Kanji
          let subdeck = '';
          let level = 0;

          Array.from(value).map((k) => {
            const m = kanjiLevels.get(k);
            if (m && m.level > level) {
              level = m.level;
              subdeck = m.deckName;
            }
          });

          if (subdeck) {
            const cardIds = vs[subdeck] || [];
            cardIds.push(r.cardId);
            vs[subdeck] = cardIds;

            modelToSubdecks.set(r.modelName, vs);
          }
        }
      });

      return Promise.all(
        Array.from(modelToSubdecks).map(([modelName, subdecks]) =>
          anki.api('modelTemplates', { modelName }).then((templates) =>
            Object.entries(subdecks).map(([subdeck, cardIds]) => ({
              modelName,
              templateNames: Object.keys(templates),
              subdeck,
              cardIdsSet: new Set(cardIds),
            })),
          ),
        ),
      );
    })
    .then(async (rs) => {
      const remaining: {
        [templateName: string]: Set<number>;
      } = {};

      const cardsByTemplateName = {
        data: new Map<string, number[]>(),
        async get(templateName: string) {
          let v = this.data.get(templateName);
          if (!v) {
            v = await anki.api('findCards', {
              query: `${deckQuery} card:${templateName}`,
            });
            remaining[templateName] = new Set(v);
          }
          this.data.set(templateName, v);
          return v;
        },
      };

      const toChangeDeck: IAnkiConnectActions['changeDeck']['params'][] = [];

      for (const { templateName, subdeck, cardIdsSet } of rs
        .flat()
        .flatMap((r) =>
          r.templateNames.map((templateName) => ({
            ...r,
            templateName,
          })),
        )) {
        const cards = await cardsByTemplateName.get(templateName);

        toChangeDeck.push({
          cards: cards.filter((c) => {
            const r = remaining[templateName];
            if (r) {
              r.delete(c);
            }
            return cardIdsSet.has(c);
          }),
          deck: `${DECK}::${subdeck}::${templateName}`,
        });
      }

      Object.entries(remaining).map(([templateName, cards]) => {
        if (cards.size) {
          toChangeDeck.push({
            cards: [...cards],
            deck: `${DECK}::独習::${templateName}`,
          });
        }
      });

      if (toChangeDeck.length) {
        const batchSize = 20;
        for (let i = 0; i < toChangeDeck.length; i += batchSize) {
          await Promise.all(
            toChangeDeck
              .slice(i, i + batchSize)
              .map((params) => anki.api('changeDeck', params)),
          );
        }

        await anki.api('setDeckConfigId', {
          decks: toChangeDeck.map((r) => r.deck),
          configId: deckConfig.id,
        });
      }
    });
}

if (require.main === module) {
  main();
}