'use strict';Object.defineProperty(exports,Symbol.toStringTag,{value:'Module'});const cacheFilesystem=require('../../_virtual/cache-filesystem.cjs'),require$$0=require('better-sqlite3'),require$$1$1=require('node:os'),require$$0$2=require('node:path'),require$$1=require('node:fs'),require$$0$1=require('picocolors'),require$$3=require('foxts/fast-string-array-join'),require$$6=require('node:perf_hooks');var hasRequiredCacheFilesystem;

function requireCacheFilesystem () {
	if (hasRequiredCacheFilesystem) return cacheFilesystem.__exports;
	hasRequiredCacheFilesystem = 1;
	(function (exports) {
		Object.defineProperty(exports, "__esModule", {
		    value: true
		});
		function _export(target, all) {
		    for(var name in all)Object.defineProperty(target, name, {
		        enumerable: true,
		        get: all[name]
		    });
		}
		_export(exports, {
		    Cache: function() {
		        return Cache;
		    },
		    deserializeArray: function() {
		        return deserializeArray;
		    },
		    serializeArray: function() {
		        return serializeArray;
		    }
		});
		const _bettersqlite3 = /*#__PURE__*/ _interop_require_default(require$$0);
		const _nodeos = /*#__PURE__*/ _interop_require_default(require$$1$1);
		const _nodepath = /*#__PURE__*/ _interop_require_default(require$$0$2);
		const _nodefs = require$$1;
		const _picocolors = /*#__PURE__*/ _interop_require_default(require$$0$1);
		const _faststringarrayjoin = require$$3;
		const _nodeperf_hooks = require$$6;
		function _interop_require_default(obj) {
		    return obj && obj.__esModule ? obj : {
		        default: obj
		    };
		}
		class Cache {
		    db;
		    /** Time before deletion */ tbd = 60 * 1000;
		    /** SQLite file path */ cachePath;
		    /** Table name */ tableName;
		    type;
		    statement;
		    constructor({ cachePath = _nodepath.default.join(_nodeos.default.tmpdir() || '/tmp', 'hdc'), tbd, tableName = 'cache', type } = {}){
		        const start = _nodeperf_hooks.performance.now();
		        this.cachePath = cachePath;
		        (0, _nodefs.mkdirSync)(this.cachePath, {
		            recursive: true
		        });
		        if (tbd != null) this.tbd = tbd;
		        this.tableName = tableName;
		        if (type) {
		            this.type = type;
		        } else {
		            // @ts-expect-error -- fallback type
		            this.type = 'string';
		        }
		        const db = (0, _bettersqlite3.default)(_nodepath.default.join(this.cachePath, 'cache.db'));
		        db.pragma('journal_mode = WAL');
		        db.pragma('synchronous = normal');
		        db.pragma('temp_store = memory');
		        db.pragma('optimize');
		        db.prepare(`CREATE TABLE IF NOT EXISTS ${this.tableName} (key TEXT PRIMARY KEY, value ${this.type === 'string' ? 'TEXT' : 'BLOB'}, ttl REAL NOT NULL);`).run();
		        db.prepare(`CREATE INDEX IF NOT EXISTS cache_ttl ON ${this.tableName} (ttl);`).run();
		        /** cache stmt */ this.statement = {
		            updateTtl: db.prepare(`UPDATE ${this.tableName} SET ttl = ? WHERE key = ?;`),
		            del: db.prepare(`DELETE FROM ${this.tableName} WHERE key = ?`),
		            insert: db.prepare(`INSERT INTO ${this.tableName} (key, value, ttl) VALUES ($key, $value, $valid) ON CONFLICT(key) DO UPDATE SET value = $value, ttl = $valid`),
		            get: db.prepare(`SELECT ttl, value FROM ${this.tableName} WHERE key = ? LIMIT 1`)
		        };
		        const date = new Date();
		        // perform purge on startup
		        // ttl + tbd < now => ttl < now - tbd
		        const now = date.getTime() - this.tbd;
		        db.prepare(`DELETE FROM ${this.tableName} WHERE ttl < ?`).run(now);
		        this.db = db;
		        const dateString = `${date.getFullYear()}-${date.getMonth() + 1}-${date.getDate()}`;
		        const lastVaccum = this.get('__LAST_VACUUM');
		        if (lastVaccum === undefined || lastVaccum !== dateString && date.getUTCDay() === 6) {
		            console.log(_picocolors.default.magenta('[cache] vacuuming'));
		            this.set('__LAST_VACUUM', dateString, 10 * 365 * 60 * 60 * 24 * 1000);
		            this.db.exec('VACUUM;');
		        }
		        const end = _nodeperf_hooks.performance.now();
		        console.log(`${_picocolors.default.gray(`[${(end - start).toFixed(3)}ns]`)} cache initialized from ${this.tableName} @ ${this.cachePath}`);
		    }
		    set(key, value, ttl = 60 * 1000) {
		        const valid = Date.now() + ttl;
		        this.statement.insert.run({
		            $key: key,
		            key,
		            $value: value,
		            value,
		            $valid: valid,
		            valid
		        });
		    }
		    get(key) {
		        const rv = this.statement.get.get(key);
		        if (!rv) return null;
		        if (rv.ttl < Date.now()) {
		            this.del(key);
		            return null;
		        }
		        if (rv.value == null) {
		            this.del(key);
		            return null;
		        }
		        return rv.value;
		    }
		    updateTtl(key, ttl) {
		        this.statement.updateTtl.run(Date.now() + ttl, key);
		    }
		    del(key) {
		        this.statement.del.run(key);
		    }
		    destroy() {
		        this.db.close();
		    }
		    deleteTable(tableName) {
		        this.db.exec(`DROP TABLE IF EXISTS ${tableName};`);
		    }
		}
		// process.on('exit', () => {
		//   fsFetchCache.destroy();
		// });
		const separator = '\u0000';
		const serializeArray = (arr)=>(0, _faststringarrayjoin.fastStringArrayJoin)(arr, separator);
		const deserializeArray = (str)=>str.split(separator); 
	} (cacheFilesystem.__exports));
	return cacheFilesystem.__exports;
}exports.__require=requireCacheFilesystem;