define(["jquery", "core", "async-runner"], function($, core, asyncRunner) {

	var sshHelper = {};

	// Only used to check the offline status
	function connect(task) {
		task.onRun(function() {
			if(core.isOffline === true) {
				task.error(new Error("Operation not available in offline mode.|stopPublish"));
				return;
			}
			task.chain();
		});
	}

	sshHelper.upload = function(host, port, username, password, path, title, content, callback) {
		callback = callback || core.doNothing;
		var task = asyncRunner.createTask();
		connect(task);
		task.onRun(function() {
			var url = SSH_PROXY_URL + "upload";
			var data = {
				host: host,
				port: port,
				username: username,
				password: password,
				path: path,
				title: title,
				content: content
			};
			$.ajax({
				url : url,
				data: data,
				type: "POST",
				dataType : "json",
				timeout : AJAX_TIMEOUT
			}).done(function(response, textStatus, jqXHR) {
				if(response.error === undefined) {
					task.chain();
					return;
				}
				handleError(response.error, task);
			}).fail(function(jqXHR) {
				var error = {
					code: jqXHR.status,
					message: jqXHR.statusText
				};
				handleError(error, task);
			});
		});
		task.onSuccess(function() {
			callback();
		});
		task.onError(function(error) {
			callback(error);
		});
		asyncRunner.addTask(task);
	};
	
	function handleError(error, task) {
		var errorMsg = undefined;
		if (error) {
			console.error(error);
			// Try to analyze the error
			if (typeof error === "string") {
				errorMsg = "SSH error: " + error + ".";
			}
			else {
				errorMsg = "Could not publish on SSH server.";
				if (error.code <= 0) {
					core.setOffline();
					errorMsg = "|stopPublish";
				}
			}
		}
		task.error(new Error(errorMsg));
	}

	return sshHelper;
});