// this script talks to the button, tells whether it is off or on,
// and communicates this state to the open tabs

var on = true;
var TYPES = { Status: 0, Connected: 1, Disconnected: 2, Image: 3, Text: 4 }

chrome.browserAction.onClicked.addListener(function(tab) {
	on = ! on
  if (on) {
    localStorage.setItem("megapixels", "on")
    chrome.browserAction.setIcon({path: 'alone-on.png'})
    chrome.browserAction.setTitle({title: "Stop Mego"});
    chrome.tabs.getSelected(null, function(tab) {
      chrome.tabs.sendMessage(tab.id, {method:"start"}, function(response){})
    })
  }
  else {
    localStorage.setItem("megapixels", "off")
    chrome.browserAction.setIcon({path: 'alone-off.png'})
    chrome.browserAction.setTitle({title: "Start Mego"})
    chrome.tabs.getSelected(null, function(tab) {
      chrome.tabs.sendMessage(tab.id, {method:"stop"}, function(response){})
    })
  }
});

// websocket boilerplate
// var ws, ws_timeout, ws_delay = 500, opt = {}
// function reset () {
//   close()
//   clearTimeout(ws_timeout)
//   ws_delay = Math.min(ws_delay*2, 60000)
//   ws_timeout = setTimeout(open, ws_delay)
// }
// function open () {
//   close()
//   ws = new WebSocket('ws://' + opt.server + ':' + opt.port)
//   ws.onopen = function (event) {
//     ws_delay = 500
//     send({ type: TYPES.Connected, data: { client: "browser" } })
//     console.log('websocket open')
//   }
//   ws.onerror = function () {
//     reset()
//   }
//   ws.onclose = function () {
//     reset()
//   }
// }
// function close () {
//   try {
//     ws.close()
//     ws = null
//   } catch (e) {}
// }
// function send (msg, force) {
// 	msg.name = opt.name
// 	if ( (on || force) && ws ) ws.send(JSON.stringify(msg))
// }

// // load options and connect websocket
// chrome.storage.sync.get({
// 	server: 'localhost',
// 	port: 3000,
// 	name: 'whomever',
// }, function(items) {
// 	console.log(items)
// 	"server port name".split(" ").forEach(function(id){
// 		opt[id] = items[id]
// 	})
// 	open()
// });

// chrome.storage.onChanged.addListener(function(changes, ns) {
// 	for (key in changes) {
// 		var change = changes[key]
// 		opt[key] = change.newValue
// 	}
// 	open()
// });

// // listen for image urls
// chrome.webRequest.onResponseStarted.addListener(function(details) {
//   send({ type: TYPES.Image, data: details.url })
// }, {
//   urls: ["<all_urls>"],
//   types: ["image"]
// }, ["responseHeaders"]);

function push(s){
  console.log(s)
  let d = localStorage.getItem('site')
  if (s === 'done') {
    download('[' + localStorage.getItem('site') + ']')
    return
  }
  if (d) s = d + ',' + s
  localStorage.setItem('site', s)
}
function reset(){
  localStorage.setItem('site', '')
}
function download(content, fileName, contentType) {
  var a = document.createElement("a");
  var file = new Blob([JSON.stringify(content)], {type: contentType});
  a.href = URL.createObjectURL(file);
  a.download = fileName;
  a.click();
}

// new pages will check if we're listening
chrome.extension.onMessage.addListener(function(request, sender, sendResponse) {
  console.log(request)
  switch (request.type) {
  	case TYPES.Status:
			sendResponse({ status: localStorage['megapixels'] })
			break
		case TYPES.Text:
			push(request.data)
			break
  }
});

// injects check.js into tabs if not already loaded
chrome.tabs.query({}, function(tabs) { 
  for (var i = 0; i < tabs.length; i++) {
    var tabid = tabs[i].id;
    if (tabs[i].url.indexOf("chrome") === -1) {
			chrome.tabs.executeScript(tabid, {
				file: "check.js"
			})
		}
  }
})