const fs = require("fs");
const path = require("path");
const R = require("ramda");
const { DOMAINS_PATH } = require("./constants");

const toDomain = (str) => path.join(DOMAINS_PATH, str);

const parseDomain = (name) => (str) => {
    try {
        return JSON.parse(str);
    } catch (e) {
        throw new Error(`Error: Could not parse ${name} => ${str}`);
    }
};

const toDomainData = (name) =>
    R.compose(parseDomain(name), R.toString, fs.readFileSync, toDomain)(name);

const getDomains = () =>
    fs.promises.readdir(DOMAINS_PATH, {}).then(
        R.map((name) => ({
            ...toDomainData(name),
            name: name.replace(/\.json$/, ""),
        })),
    );

module.exports = { getDomains };