import { Router } from 'express';
import { loadSuml, loadSumlFromBase, loadTsv } from '../loader.ts';
import { buildPronoun, parsePronouns } from '../../src/buildPronoun.ts';
import { buildList, handleErrorAsync } from '../../src/helpers.ts';
import { Example } from '../../src/classes.ts';
import { caches } from '../../src/cache.ts';
import { Translator } from '../../src/translator.ts';
import type { Pronoun } from '../../src/classes.ts';
import md5 from 'js-md5';
import assert from 'assert';
import fetch from 'node-fetch';
import type { PronounExamplesData } from '../../locale/data.ts';

const translations = loadSuml('translations');
const baseTranslations = loadSumlFromBase('locale/_base/translations');

const translator = new Translator(translations, baseTranslations, global.config);

const buildExample = (e: PronounExamplesData): Example => new Example(
    Example.parse(e.singular),
    Example.parse(e.plural || e.singular),
    e.isHonorific,
);

const requestExamples = (r: string[] | undefined): PronounExamplesData[] => {
    if (!r || !r.length) {
        return loadTsv('pronouns/examples');
    }

    return buildList(function* () {
        for (const rr of r) {
            const [singular, plural, isHonorific] = rr.split('|');
            yield { singular, plural, isHonorific: !!isHonorific };
        }
    });
};

const addExamples = (pronoun: Pronoun, examples: PronounExamplesData[]): string[] => {
    return buildList(function* () {
        for (const example of examples) {
            yield buildExample(example).format(pronoun);
        }
    });
};

const modifyPronoun = (pronoun: Pronoun, examples: string[] | undefined) => {
    const modifiedPronoun: any = pronoun;
    modifiedPronoun.examples = addExamples(pronoun, requestExamples(examples));
    modifiedPronoun.name = pronoun.name();
    delete modifiedPronoun.config;
    delete modifiedPronoun.hidden;
};

const router = Router();

router.get('/pronouns', handleErrorAsync(async (req, res) => {
    const pronouns: Record<string, Pronoun> = {};
    for (const [name, pronoun] of Object.entries(parsePronouns(global.config, loadTsv('pronouns/pronouns')))) {
        if (pronoun.hidden) {
            continue;
        }
        pronouns[name] = pronoun;
    }
    for (const pronoun of Object.values(pronouns)) {
        modifyPronoun(pronoun, req.query.examples as string[] | undefined);
    }
    return res.json(pronouns);
}));

router.get('/pronouns/:pronoun*', handleErrorAsync(async (req, res) => {
    const pronoun = buildPronoun(
        parsePronouns(global.config, loadTsv('pronouns/pronouns')),
        req.params.pronoun + req.params[0],
        global.config,
        translator,
    );
    if (pronoun) {
        modifyPronoun(pronoun, req.query.examples as string[] | undefined);
    }
    return res.json(pronoun);
}));

router.get('/pronouns-name/:pronoun*', handleErrorAsync(async (req, res) => {
    const pronoun = buildPronoun(
        parsePronouns(global.config, loadTsv('pronouns/pronouns')),
        (req.params.pronoun + req.params[0]).toLowerCase(),
        global.config,
        translator,
    );
    if (!pronoun) {
        return res.status(404).json({ error: 'Not found' });
    }
    return res.json(pronoun.name());
}));

router.get('/remote-pronouns-name/:locale/:pronoun*', handleErrorAsync(async (req, res) => {
    assert(req.locales.hasOwnProperty(req.params.locale));
    const pronoun = req.params.pronoun + req.params[0];
    const name = await caches.pronounNames(`${req.params.locale}/${md5(pronoun)}.txt`).fetch(async () => {
        const res = await (await fetch(`${req.locales[req.params.locale].url}/api/pronouns-name/${pronoun.split('/').map((p) => encodeURIComponent(p))}`)).json();
        if (typeof res === 'object' && res.error) {
            return pronoun;
        }
        return res;
    });

    return res.json(name);
}));

export default router;