"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.DiskCache = void 0;
const trie_1 = require("@kamilmielnik/trie");
const fs_1 = __importDefault(require("fs"));
const constants_1 = require("../constants");
const getDictionaryFilepath_1 = require("./getDictionaryFilepath");
class DiskCache {
    async get(locale) {
        if (!this.has(locale)) {
            return undefined;
        }
        const filepath = (0, getDictionaryFilepath_1.getDictionaryFilepath)(locale);
        const serialized = await fs_1.default.promises.readFile(filepath, 'utf-8');
        const trie = trie_1.Trie.deserialize(serialized);
        return trie;
    }
    getLastModifiedTimestamp(locale) {
        const filepath = (0, getDictionaryFilepath_1.getDictionaryFilepath)(locale);
        if (!fs_1.default.existsSync(filepath)) {
            return undefined;
        }
        const stats = fs_1.default.statSync(filepath);
        return stats.mtimeMs;
    }
    has(locale) {
        const filepath = (0, getDictionaryFilepath_1.getDictionaryFilepath)(locale);
        return fs_1.default.existsSync(filepath);
    }
    isStale(locale) {
        if (!this.has(locale)) {
            return undefined;
        }
        const lastModifiedTimestamp = this.getLastModifiedTimestamp(locale);
        if (typeof lastModifiedTimestamp === 'undefined') {
            return undefined;
        }
        const timeSinceModification = Math.abs(lastModifiedTimestamp - Date.now());
        return timeSinceModification > constants_1.CACHE_STALE_THRESHOLD;
    }
    async set(locale, trie) {
        const filepath = (0, getDictionaryFilepath_1.getDictionaryFilepath)(locale);
        await fs_1.default.promises.writeFile(filepath, trie.serialize());
    }
}
exports.DiskCache = DiskCache;
