var path = require('path'),
    fs = require('fs-extra'),
    _ = require('lodash');

exports.isPrivacyDisabled = function isPrivacyDisabled(privacyFlag) {
    if (!this.get('privacy')) {
        return false;
    }

    // CASE: disable all privacy features
    if (this.get('privacy').useTinfoil === true) {
        // CASE: you can still enable single features
        if (this.get('privacy')[privacyFlag] === true) {
            return false;
        }

        return true;
    }

    return this.get('privacy')[privacyFlag] === false;
};

/**
 * transform all relative paths to absolute paths
 * @TODO: re-write this function a little bit so we don't have to add the parent path - that is hard to understand
 *
 * Path must be string.
 * Path must match minimum one / or \
 * Path can be a "." to re-present current folder
 */
exports.makePathsAbsolute = function makePathsAbsolute(obj, parent) {
    var self = this;

    _.each(obj, function (configValue, pathsKey) {
        if (_.isObject(configValue)) {
            makePathsAbsolute.bind(self)(configValue, parent + ':' + pathsKey);
        } else if (
            _.isString(configValue) &&
            (configValue.match(/\/+|\\+/) || configValue === '.') &&
            !path.isAbsolute(configValue)
        ) {
            self.set(parent + ':' + pathsKey, path.normalize(path.join(__dirname, '../../..', configValue)));
        }
    });
};

/**
 * we can later support setting folder names via custom config values
 */
exports.getContentPath = function getContentPath(type) {
    switch (type) {
    case 'images':
        return path.join(this.get('paths:contentPath'), 'images/');
    case 'themes':
        return path.join(this.get('paths:contentPath'), 'themes/');
    case 'storage':
        return path.join(this.get('paths:contentPath'), 'adapters', 'storage/');
    case 'scheduling':
        return path.join(this.get('paths:contentPath'), 'adapters', 'scheduling/');
    case 'logs':
        return path.join(this.get('paths:contentPath'), 'logs/');
    case 'data':
        return path.join(this.get('paths:contentPath'), 'data/');
    case 'settings':
        return path.join(this.get('paths:contentPath'), 'settings/');
    default:
        throw new Error('getContentPath was called with: ' + type);
    }
};

/**
 * @TODO:
 *   - content/logs folder is required right now, otherwise Ghost want start
 */
exports.doesContentPathExist = function doesContentPathExist() {
    if (!fs.pathExistsSync(this.get('paths:contentPath'))) {
        throw new Error('Your content path does not exist! Please double check `paths.contentPath` in your custom config file e.g. config.production.json.');
    }
};

/**
* Check if the URL in config has a protocol and sanitise it if not including a warning that it should be changed
*/
exports.checkUrlProtocol = function checkUrlProtocol() {
    var url = this.get('url');

    if (!url.match(/^https?:\/\//i)) {
        throw new Error('URL in config must be provided with protocol, eg. "http://my-ghost-blog.com"');
    }
};

/**
 * nconf merges all database keys together and this can be confusing
 * e.g. production default database is sqlite, but you override the configuration with mysql
 *
 * this.clear('key') does not work
 * https://github.com/indexzero/nconf/issues/235#issuecomment-257606507
 */
exports.sanitizeDatabaseProperties = function sanitizeDatabaseProperties() {
    var database = this.get('database');

    if (this.get('database:client') === 'mysql') {
        delete database.connection.filename;
    } else {
        delete database.connection.host;
        delete database.connection.user;
        delete database.connection.password;
        delete database.connection.database;
    }

    this.set('database', database);
};