'use strict';

function onMountRequested(onSuccess, onError) {
	console.log("mount requested");
	getMountInfo(function(mountInfo) { mount(mountInfo, onSuccess, onError); });
}


function getMountInfo(callback) {
	let windowCallback = function(appWindow) {
		let listener = function(message) {
			if(message.senderId == appWindow.id) {
				callback(message.mountInfo);
			} else {
				console.log(message);
				console.log(appWindow);
				console.log(message.senderId);
				console.log(appWindow.id);
			}
			chrome.runtime.onMessage.removeListener(listener);
		};
		chrome.runtime.onMessage.addListener(listener);
	};

	let windowOptions = { outerBounds : { width: 800, height: 600 }, resizable : false, id: Date.now().toString() };
	chrome.app.window.create("mount-info.html", windowOptions, windowCallback);
}

function mount(mountInfo, onSuccess, onError) {
	console.log("mount()");
	let request = new XMLHttpRequest();
	request.open("GET", mountInfo.url, true);
	request.onreadystatechange = function() {
		if(request.readyState != XMLHttpRequest.DONE) return;
		try {
			JSON.parse(request.responseText);

			let options = { fileSystemId: mountInfo.url, displayName: mountInfo.name, writable: false };
			chrome.fileSystemProvider.mount(options);

			console.log("mount succeeded");
			onSuccess();
		} catch(exception) {
			console.log(exception);
			console.log("mount failed");
			onError();
		}
	};
	request.send();
}

chrome.fileSystemProvider.onMountRequested.addListener(onMountRequested);