// Import necessary modules
import debug from 'debug';
import { config } from 'dotenv';
import { writeFile } from 'fs';
import { inspect } from 'util';

// Load environment variables
config();

const logLocation = process.env.LOG_LOCATION;

const writeToLog = async (logMessage, appName) => {
    logMessage = `${String(logMessage)}\n`;

    writeFile(
        logLocation ?? `./${appName}.log`,
        logMessage,
        { encoding: "utf-8", flag: 'a+' },
        (err) => {
            if (err) console.error(err);
        }
    );
};

/**
 * Create the different logging methods for a function
 * Namespace template = ("[app]:[fileName]:['INFO', 'WARNING', 'DEBUG', 'ERROR']")
 * @param {string} appName The name of the app to be used in the 'app' portion of the namespace
 * @param {string} fileName The name of the file calling the builder to be used in the 'fileName' portion of the namespace
 */
export class DebugBuilder {
    constructor(appName, fileName) {
        this.INFO = (...messageParts) => { 
            const _info = debug(`${appName}:${fileName}:INFO`);
            _info(messageParts);
            writeToLog(`${new Date().toLocaleString('en-US', { timeZone: 'America/New_York' })} - ${appName}:${fileName}:INFO\t-\t${messageParts.map(messagePart => inspect(messagePart))}`, appName);
        };
        
        this.DEBUG = (...messageParts) => { 
            const _debug = debug(`${appName}:${fileName}:DEBUG`);
            _debug(messageParts);            
            writeToLog(`${new Date().toLocaleString('en-US', { timeZone: 'America/New_York' })} - ${appName}:${fileName}:DEBUG\t-\t${messageParts.map(messagePart => inspect(messagePart))}`, appName);
        };
        
        this.VERBOSE = (...messageParts) => { 
            const _verbose = debug(`${appName}:${fileName}:VERBOSE`);
            _verbose(messageParts);
            writeToLog(`${new Date().toLocaleString('en-US', { timeZone: 'America/New_York' })} - ${appName}:${fileName}:VERBOSE\t-\t${messageParts.map(messagePart => inspect(messagePart))}`, appName);
        };
        
        this.WARN = (...messageParts) => {
            const _warn = debug(`${appName}:${fileName}:WARNING`);
            _warn(messageParts);
            writeToLog(`${new Date().toLocaleString('en-US', { timeZone: 'America/New_York' })} - ${appName}:${fileName}:WARNING\t-\t${messageParts.map(messagePart => inspect(messagePart))}`, appName);
        };

        this.ERROR = (...messageParts) => {
            const _error = debug(`${appName}:${fileName}:ERROR`);
            _error(messageParts);
            writeToLog(`${new Date().toLocaleString('en-US', { timeZone: 'America/New_York' })} - ${appName}:${fileName}:ERROR\t-\t${messageParts.map(messagePart => inspect(messagePart))}`, appName);
            if (process.env.EXIT_ON_ERROR && process.env.EXIT_ON_ERROR > 0) {
                writeToLog("!--- EXITING ---!", appName);
                setTimeout(() => process.exit(), process.env.EXIT_ON_ERROR_DELAY ?? 0);
            }
        };
    }
}