'use strict';

const fs = require("fs");

module.exports = function loadConfiguration(configurationPath) {
    if (configurationPath == null) {
        console.error("You must specify a configuration file.");
        process.exit(1);
    }

    let config = JSON.parse(fs.readFileSync(configurationPath));

    if (config.metadata == null || config.metadata.from == null || config.metadata.to == null) {
        console.error("Your configuration file must specify at least a sender (metadata.from) and a recipient (metadata.to).");
        process.exit(1);
    }

    if (config.errorPath == null) {
        console.error("Your configuration file must specify an errorPath.");
        process.exit(1);
    }

    if (config.subjectFormat == null) {
        config.subjectFormat = "UNHANDLED ERROR: $type - $message"
    }

    if (config.stackFilter == null) {
        config.stackFilter = "*";
    }

    return config;
};