"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const fs_1 = require("fs");
const util_1 = require("util");
const path_1 = require("path");
const utils_1 = require("./utils");
const statAsync = util_1.promisify(fs_1.stat);
const readFileAsync = util_1.promisify(fs_1.readFile);
/**
 * Gets the env vars from the rc file and rc environments
 */
async function getRCFileVars({ environments, filePath }) {
    const absolutePath = utils_1.resolveEnvFilePath(filePath);
    try {
        await statAsync(absolutePath);
    }
    catch (e) {
        const pathError = new Error('Invalid .rc file path.');
        pathError.name = 'PathError';
        throw pathError;
    }
    // Get the file extension
    const ext = path_1.extname(absolutePath).toLowerCase();
    let parsedData;
    if (ext === '.json' || ext === '.js') {
        const possiblePromise = require(absolutePath); /* eslint-disable-line */
        parsedData = utils_1.isPromise(possiblePromise) ? await possiblePromise : possiblePromise;
    }
    else {
        const file = await readFileAsync(absolutePath, { encoding: 'utf8' });
        parsedData = parseRCFile(file);
    }
    // Parse and merge multiple rc environments together
    let result = {};
    let environmentFound = false;
    environments.forEach((name) => {
        const envVars = parsedData[name];
        if (envVars) {
            environmentFound = true;
            result = Object.assign({}, result, envVars);
        }
    });
    if (!environmentFound) {
        console.error(`Error:
  Could not find any environments:
    ${environments}
  in .rc file:
    ${absolutePath}`);
        throw new Error(`All environments (${environments}) are missing in in .rc file (${absolutePath}).`);
    }
    return result;
}
exports.getRCFileVars = getRCFileVars;
/**
 * Reads and parses the .rc file
 */
function parseRCFile(fileData) {
    let data;
    try {
        data = JSON.parse(fileData);
    }
    catch (e) {
        console.error(`Error:
  Failed to parse the .rc file.
  Please make sure its a valid JSON format.`);
        throw new Error(`Unable to parse JSON in .rc file.`);
    }
    return data;
}
exports.parseRCFile = parseRCFile;