import { accessSync, writeFileSync, createWriteStream, mkdirSync } from 'node:fs';
import { dirname as directoryname } from 'node:path';
export class FileLogger {
    #filename;
    #dirname;
    writableStream;
    constructor(filename) {
        this.#dirname = directoryname(filename);
        this.#filename = filename;
        this.#_stat();
        this.#_createWritableStream();
        this.#_endStream();
    }
    #fsAccess(filename, mode) {
        try {
            accessSync(filename, mode);
            return true;
        }
        catch (error) {
            return false;
        }
    }
    #_stat() {
        //check if file exists
        if (!this.#fsAccess(this.#filename)) {
            // check if directory exists
            if (!this.#fsAccess(this.#dirname)) {
                // create the directory
                mkdirSync(this.#dirname, { recursive: true });
            }
            // create the file and write an empty string to it
            writeFileSync(this.#filename, '');
            return;
        }
    }
    #_createWritableStream() {
        this.writableStream = createWriteStream(this.#filename, { flags: 'a' });
    }
    toFile(stringToLog) {
        this.writableStream.write(stringToLog + '\n');
    }
    #_endStream() {
        process.on('exit', () => {
            this.writableStream.close();
        });
        process.on('SIGTERM', () => {
            this.writableStream.close();
            process.exit(0);
        });
        process.on('SIGINT', () => {
            this.writableStream.close();
            process.exit(0);
        });
        process.on('uncaughtException', () => {
            this.writableStream.close();
            process.exit(1);
        });
    }
}