'use strict';

const Promise = require("bluebird");
const fs = Promise.promisifyAll(require("fs"));

let maxAttempts = 100;

module.exports = function readError(errorFilePath, attempt = 0) {
    return Promise.try(() => {
        return fs.readFileAsync(errorFilePath);
    }).then((fileContents) => {
        return JSON.parse(fileContents);
    }).catch(SyntaxError, (err) => {
        if (attempt < maxAttempts) {
            /* The JSON hasn't been completely written yet. We'll retry in a bit. */
            return Promise.delay(1000).then(() => {
                reportError(errorFilePath, attempt + 1);
            });
        } else {
            throw new Error(`Could not parse error file ${errorFilePath}, and reached maximum attempts`);
        }
    });
};