'use strict';

exports = module.exports = {
    addProfile,
    removeProfile
};

const assert = require('assert'),
    BoxError = require('./boxerror.js'),
    debug = require('debug')('collectd'),
    path = require('path'),
    paths = require('./paths.js'),
    safe = require('safetydance'),
    shell = require('./shell.js');

const CONFIGURE_COLLECTD_CMD = path.join(__dirname, 'scripts/configurecollectd.sh');

async function addProfile(name, profile) {
    assert.strictEqual(typeof name, 'string');
    assert.strictEqual(typeof profile, 'string');

    const configFilePath = path.join(paths.COLLECTD_APPCONFIG_DIR, `${name}.conf`);

    // skip restarting collectd if the profile already exists with the same contents
    const currentProfile = safe.fs.readFileSync(configFilePath, 'utf8') || '';
    if (currentProfile === profile) return;

    if (!safe.fs.writeFileSync(configFilePath, profile)) throw new BoxError(BoxError.FS_ERROR, `Error writing collectd config: ${safe.error.message}`);

    const [error] = await safe(shell.promises.sudo('addCollectdProfile', [ CONFIGURE_COLLECTD_CMD, 'add', name ], {}));
    if (error) throw new BoxError(BoxError.COLLECTD_ERROR, 'Could not add collectd config');
}

async function removeProfile(name) {
    assert.strictEqual(typeof name, 'string');

    if (!safe.fs.unlinkSync(path.join(paths.COLLECTD_APPCONFIG_DIR, `${name}.conf`))) {
        if (safe.error.code !== 'ENOENT') debug('Error removing collectd profile', safe.error);
    }

    const [error] = await safe(shell.promises.sudo('removeCollectdProfile', [ CONFIGURE_COLLECTD_CMD, 'remove', name ], {}));
    if (error) throw new BoxError(BoxError.COLLECTD_ERROR, 'Could not remove collectd config');
}