'use strict';

var async = require('async');
var path = require('path');
var nconf = require('nconf');
var winston = require('winston');

var db = require('../database');
var file = require('../file');
var batch = require('../batch');

module.exports = function (User) {
	User.deleteUpload = function (callerUid, uid, uploadName, callback) {
		async.waterfall([
			function (next) {
				async.parallel({
					isUsersUpload: function (next) {
						db.isSortedSetMember('uid:' + callerUid + ':uploads', uploadName, next);
					},
					isAdminOrGlobalMod: function (next) {
						User.isAdminOrGlobalMod(callerUid, next);
					},
				}, next);
			},
			function (results, next) {
				if (!results.isAdminOrGlobalMod && !results.isUsersUpload) {
					return next(new Error('[[error:no-privileges]]'));
				}

				winston.verbose('[user/deleteUpload] Deleting ' + uploadName);
				async.parallel([
					async.apply(file.delete, path.join(nconf.get('upload_path'), uploadName)),
					async.apply(file.delete, path.join(nconf.get('upload_path'), path.dirname(uploadName), path.basename(uploadName, path.extname(uploadName)) + '-resized' + path.extname(uploadName))),
				], function (err) {
					// Only return err, not the parallel'd result set
					next(err);
				});
			},
			function (next) {
				db.sortedSetRemove('uid:' + uid + ':uploads', uploadName, next);
			},
		], callback);
	};

	User.collateUploads = function (uid, archive, callback) {
		batch.processSortedSet('uid:' + uid + ':uploads', function (files, next) {
			files.forEach(function (file) {
				archive.file(path.join(nconf.get('upload_path'), file), {
					name: path.basename(file),
				});
			});

			setImmediate(next);
		}, function (err) {
			callback(err);
		});
	};
};