const fs = require('fs');
const config = require('../../config-handler');

const unknownError = (err) => {
	const stackId = (new Date()).getTime();
	let errorLoggingFolder = config().error_logs_folder;
	errorLoggingFolder = !['/', '\\'].includes(errorLoggingFolder.at(-1)) ? errorLoggingFolder + '/' : errorLoggingFolder;
	fs.writeFileSync(`${errorLoggingFolder}error_${stackId}.log`, `ERROR:
Date: ${new Date()}
Name: ${err.name}
Message: ${err.message}
Stack:
${err.stack}`);
	
	return {
		error   : 'UNKNOWN_ERROR',
		details : {
			trace_id : stackId
		}
	};
}

const unknownResponseFormat = 'UNKNOWN_RESPONSE_FORMAT';

async function handlingError (funct, success, error) {
	try {
		success(await funct());
	}
	catch (e) {
		// console.log('error', e);
		error(e.name === 'ApiError' ? {
			error   : e.message,
			details : e.details
		} : unknownError(e));
	}
}

module.exports = async (method, req, res) => {
	if (req.query.response_format === 'json') {
		handlingError(
			async () => ({ response : await method(req, res) }),
			async (data) => {
				res.sendModed(data);
			},
			async (errBody) => {
				res.errorModeOn();
				res.status(400).sendModed(errBody);
			}
		);
	}
	else {
		res.status(400).sendModed(unknownResponseFormat);
	}
}