/* MESSAGES is a list of:
  {id:int,
	src,
	title,
	subject,
	body,
	sender,
	tel:string,
	new:true // not read yet
  }
  */

/* For example for maps:

// a message
require("messages").pushMessage({"t":"add","id":1575479849,"src":"Clock","title":"Timer","body":"test"})
// maps
require("messages").pushMessage({"t":"add","id":1,"src":"Maps","title":"0 yd - High St","body":"Campton - 11:48 ETA","img":"GhqBAAAMAAAHgAAD8AAB/gAA/8AAf/gAP/8AH//gD/98B//Pg/4B8f8Afv+PP//n3/f5//j+f/wfn/4D5/8Aef+AD//AAf/gAD/wAAf4AAD8AAAeAAADAAA="});
// call
require("messages").pushMessage({"t":"add","id":"call","src":"Phone","title":"Bob","body":"12421312",positive:true,negative:true})
// message
require("messages").pushMessage({"t":"add","id":"1234","src":"Telegram","title":"testing","body":"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.",positive:true,negative:true})
*/
var Layout = require("Layout");
var settings = require('Storage').readJSON("messages.settings.json", true) || {};
var fontSmall = "6x8";
var fontMedium = g.getFonts().includes("6x15")?"6x15":"6x8:2";
var fontBig = g.getFonts().includes("12x20")?"12x20":"6x8:2";
var fontLarge = g.getFonts().includes("6x15")?"6x15:2":"6x8:4";
var active; // active screen
var openMusic = false; // go back to music screen after we handle something else?
// hack for 2v10 firmware's lack of ':size' font handling
try {
	g.setFont("6x8:2");
} catch (e) {
	g._setFont = g.setFont;
	g.setFont = function(f,s) {
		if (f.includes(":")) {
			f = f.split(":");
			return g._setFont(f[0],f[1]);
		}
		return g._setFont(f,s);
	};
}

/** this is a timeout if the app has started and is showing a single message
but the user hasn't seen it (eg no user input) - in which case
we should start a timeout for settings.unreadTimeout to return
to the clock. */
var unreadTimeout;
/// List of all our messages
var MESSAGES = require("messages").getMessages();
if (Bangle.MESSAGES) {
	// fast loading messages
	Bangle.MESSAGES.forEach(m => require("messages").apply(m, MESSAGES));
	delete Bangle.MESSAGES;
}

var onMessagesModified = function(type,msg) {
	if (msg.handled) return;
	msg.handled = true;
	require("messages").apply(msg, MESSAGES);
	// TODO: if new, show this new one
	if (msg && msg.id!=="music" && msg.new && active!="map" &&
		!((require('Storage').readJSON('setting.json', 1) || {}).quiet)) {
		require("messages").buzz(msg.src);
	}
	if (msg && msg.id=="music") {
		if (msg.state && msg.state!="play") openMusic = false; // no longer playing music to go back to
		if (active!="music") return; // don't open music over other screens
	}
	showMessage(msg&&msg.id);
};
Bangle.on("message", onMessagesModified);

function saveMessages() {
	require("messages").write(MESSAGES);
}
E.on("kill", saveMessages);

function showMapMessage(msg) {
	active = "map";
	var m, distance, street, target, eta;
	m=msg.title.match(/(.*) - (.*)/);
	if (m) {
		distance = m[1];
		street = m[2];
	} else street=msg.title;
	m=msg.body.match(/(.*) - (.*)/);
	if (m) {
		target = m[1];
		eta = m[2];
	} else target=msg.body;
	layout = new Layout({ type:"v", c: [
		{type:"txt", font:fontMedium, label:target, bgCol:g.theme.bg2, col: g.theme.fg2, fillx:1, pad:2 },
		{type:"h", bgCol:g.theme.bg2, col: g.theme.fg2,  fillx:1, c: [
			{type:"txt", font:"6x8", label:"Towards" },
			{type:"txt", font:fontLarge, label:street }
		]},
		{type:"h",fillx:1, filly:1, c: [
			msg.img?{type:"img",src:atob(msg.img), scale:2}:{},
			{type:"v", fillx:1, c: [
				{type:"txt", font:fontLarge, label:distance||"" }
			]},
		]},
		{type:"txt", font:"6x8:2", label:eta }
	]});
	g.reset().clearRect(Bangle.appRect);
	layout.render();
	function back() { // mark as not new and return to menu
		msg.new = false;
		layout = undefined;
		checkMessages({clockIfNoMsg:1,clockIfAllRead:1,showMsgIfUnread:1,openMusic:0});
	}
	Bangle.setUI({mode:"updown", back: back}, back); // any input takes us back
}

let updateLabelsInterval;

function showMusicMessage(msg) {
	active = "music";
	// defaults, so e.g. msg.xyz.length doesn't error. `msg` should contain up to date info
	msg = Object.assign({artist: "", album: "", track: "Music"}, msg);
	openMusic = msg.state=="play";
	var trackScrollOffset = 0;
	var artistScrollOffset = 0;
	var albumScrollOffset = 0;
	var trackName = '';
	var artistName = '';
	var albumName = '';

	function fmtTime(s) {
		var m = Math.floor(s/60);
		s = (parseInt(s%60)).toString().padStart(2,0);
		return m+":"+s;
	}
	function reduceStringAndPad(text, offset, maxLen) {
		var sliceLength = offset + maxLen > text.length ? text.length - offset : maxLen;
		return text.substr(offset, sliceLength).padEnd(maxLen, " ");
	}
	function back() {
		clearInterval(updateLabelsInterval);
		updateLabelsInterval = undefined;
		openMusic = false;
		var wasNew = msg.new;
		msg.new = false;
		layout = undefined;
		if (wasNew) checkMessages({clockIfNoMsg:1,clockIfAllRead:1,showMsgIfUnread:0,openMusic:0});
		else checkMessages({clockIfNoMsg:0,clockIfAllRead:0,showMsgIfUnread:0,openMusic:0});
	}
	function updateLabels() {
		trackName = reduceStringAndPad(msg.track, trackScrollOffset, 13);
		artistName = reduceStringAndPad(msg.artist, artistScrollOffset, 21);
		albumName = reduceStringAndPad(msg.album, albumScrollOffset, 21);

		trackScrollOffset++;
		artistScrollOffset++;
		albumScrollOffset++;

		if ((trackScrollOffset + 13) > msg.track.length) trackScrollOffset = 0;
		if ((artistScrollOffset + 21) > msg.artist.length) artistScrollOffset = 0;
		if ((albumScrollOffset + 21) > msg.album.length) albumScrollOffset = 0;
	}
	updateLabels();

	layout = new Layout({ type:"v", c: [
		{type:"h", fillx:1, bgCol:g.theme.bg2, col: g.theme.fg2,  c: [
			{ type:"v", fillx:1, c: [
				{ type:"txt", font:fontMedium, bgCol:g.theme.bg2, label:artistName, pad:2, id:"artist" },
				{ type:"txt", font:fontMedium, bgCol:g.theme.bg2, label:albumName, pad:2, id:"album" }
			]}
		]},
		{type:"txt", font:fontLarge, bgCol:g.theme.bg, label:trackName, fillx:1, filly:1, pad:2, id:"track" },
		Bangle.musicControl?{type:"h",fillx:1, c: [
			{type:"btn", pad:8, label:"\0"+atob("FhgBwAADwAAPwAA/wAD/gAP/gA//gD//gP//g///j///P//////////P//4//+D//gP/4A/+AD/gAP8AA/AADwAAMAAA"), cb:()=>Bangle.musicControl("play")}, // play
			{type:"btn", pad:8, label:"\0"+atob("EhaBAHgHvwP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP/wP3gHg"), cb:()=>Bangle.musicControl("pause")}, // pause
			{type:"btn", pad:8, label:"\0"+atob("EhKBAMAB+AB/gB/wB/8B/+B//B//x//5//5//x//B/+B/8B/wB/gB+AB8ABw"), cb:()=>Bangle.musicControl("next")}, // next
		]}:{},
		{type:"txt", font:"6x8:2", label:msg.dur?fmtTime(msg.dur):"--:--" }
	]}, { back : back });
	g.reset().clearRect(Bangle.appRect);
	layout.render();

	updateLabelsInterval = setInterval(function() {
		updateLabels();
		layout.artist.label = artistName;
		layout.album.label = albumName;
		layout.track.label = trackName;
		layout.render();
	}, 400);
}

function showMessageScroller(msg) {
	active = "scroller";
	var bodyFont = fontLarge;
	g.setFont(bodyFont);
	var lines = [];
	if (msg.title) lines = g.wrapString(msg.title, g.getWidth()-10)
	lines = [lines[0]];
	var titleCnt = lines.length;
	//if (titleCnt) lines.push(""); // add blank line after title
	lines = lines.concat(g.wrapString(msg.body, g.getWidth()-10)); //,["",/*LANG*/"< Back"]);
	E.showScroller({
		h : g.getFontHeight(), // height of each menu item in pixels
		c : lines.length, // number of menu items
		// a function to draw a menu item
		draw : function(idx, r) {
			// FIXME: in 2v13 onwards, clearRect(r) will work fine. There's a bug in 2v12
			g.setBgColor(idx<titleCnt ? g.theme.bg2 : g.theme.bg).
				setColor(idx<titleCnt ? g.theme.fg2 : g.theme.fg).
				clearRect(r.x,r.y,r.x+r.w, r.y+r.h);
			g.setFont(bodyFont).drawString(lines[idx], r.x, r.y);
		//}, select : function(idx) {
		//	if (idx>=lines.length-2)
		//		showMessage(msg.id);
		//},
		//back : () => showMessage(msg.id)
		}, select : () => load(),
		back : () => load()
	});
}

function showMessageSettings(msg) {
	active = "settings";
	E.showMenu({"":{"title":/*LANG*/"Message"},
		"< Back" : () => showMessage(msg.id),
		/*LANG*/"View Message" : () => {
			showMessageScroller(msg);
		},
		/*LANG*/"Delete" : () => {
			MESSAGES = MESSAGES.filter(m=>m.id!=msg.id);
			checkMessages({clockIfNoMsg:0,clockIfAllRead:0,showMsgIfUnread:0,openMusic:0});
		},
		/*LANG*/"Mark Unread" : () => {
			msg.new = true;
			checkMessages({clockIfNoMsg:0,clockIfAllRead:0,showMsgIfUnread:0,openMusic:0});
		},
		/*LANG*/"Mark all read" : () => {
			MESSAGES.forEach(msg => msg.new = false);
			checkMessages({clockIfNoMsg:0,clockIfAllRead:0,showMsgIfUnread:0,openMusic:0});
		},
		/*LANG*/"Delete all messages" : () => {
			E.showPrompt(/*LANG*/"Are you sure?", {title:/*LANG*/"Delete All Messages"}).then(isYes => {
				if (isYes) {
					MESSAGES = [];
				}
				checkMessages({clockIfNoMsg:0,clockIfAllRead:0,showMsgIfUnread:0,openMusic:0});
			});
		},
	});
}

function showMessage(msgid) {
	var msg = MESSAGES.find(m=>m.id==msgid);
	if (updateLabelsInterval) {
		clearInterval(updateLabelsInterval);
		updateLabelsInterval=undefined;
	}
	if (!msg) return checkMessages({clockIfNoMsg:1,clockIfAllRead:0,showMsgIfUnread:0,openMusic:openMusic}); // go home if no message found
	if (msg.id=="music") {
		cancelReloadTimeout(); // don't auto-reload to clock now
		return showMusicMessage(msg);
	}
	if (msg.src=="Maps") {
		cancelReloadTimeout(); // don't auto-reload to clock now
		return showMapMessage(msg);
	}
	active = "message";
	// Normal text message display
	//var title=msg.title, titleFont = fontLarge, lines;
	//var body=msg.body, bodyFont = fontLarge;
	//// If no body, use the title text instead...
	//if (body===undefined) {
	//	body = title;
	//	title = undefined;
	//}
	//if (title) {
	//	var w = g.getWidth()-48;
	//	if (g.setFont(titleFont).stringWidth(title) > w) {
	//		titleFont = fontBig;
	//		if (settings.fontSize!=1 && g.setFont(titleFont).stringWidth(title) > w)
	//			titleFont = fontMedium;
	//	}
	//	if (g.setFont(titleFont).stringWidth(title) > w) {
	//		lines = g.wrapString(title, w);
	//		title = (lines.length>2) ? lines.slice(0,2).join("\n")+"..." : lines.join("\n");
	//	}
	//}
	//// If body of message is only two lines long w/ large font, use large font.

	//if (body) {
	//	var w = g.getWidth()-10;
	//	if (false && g.setFont(bodyFont).stringWidth(body) > w * 2) {
	//		bodyFont = fontBig;
	//		if (settings.fontSize!=1 && g.setFont(bodyFont).stringWidth(body) > w * 3)
	//			bodyFont = fontMedium;
	//	}
	//	if (g.setFont(bodyFont).stringWidth(body) > w) {
	//		lines = g.setFont(bodyFont).wrapString(msg.body, w);
	//		var maxLines = Math.floor((g.getHeight()-75) / g.getFontHeight());
	//		body = (lines.length>maxLines) ? lines.slice(0,maxLines).join("\n")+"..." : lines.join("\n");
	//	}
	//}
	//function goBack() {
	//	layout = undefined;
	//	msg.new = false; // read mail
	//	cancelReloadTimeout(); // don't auto-reload to clock now
	//	checkMessages({clockIfNoMsg:1,clockIfAllRead:0,showMsgIfUnread:0,openMusic:openMusic});
	//}
	//var buttons = [
	//];
	//if (false && msg.positive) {
	//	buttons.push({type:"btn", src:atob("GRSBAAAAAYAAAcAAAeAAAfAAAfAAAfAAAfAAAfAAAfBgAfA4AfAeAfAPgfAD4fAA+fAAP/AAD/AAA/AAAPAAADAAAA=="), cb:()=>{
	//		msg.new = false;
	//		cancelReloadTimeout(); // don't auto-reload to clock now
	//		Bangle.messageResponse(msg,true);
	//		checkMessages({clockIfNoMsg:1,clockIfAllRead:1,showMsgIfUnread:1,openMusic:openMusic});
	//	}});
	//}
	//if (false && msg.negative) {
	//	if (buttons.length) buttons.push({width:32}); // nasty hack...
	//	buttons.push({type:"btn", src:atob("FhaBADAAMeAB78AP/4B/fwP4/h/B/P4D//AH/4AP/AAf4AB/gAP/AB/+AP/8B/P4P4fx/A/v4B//AD94AHjAAMA="), cb:()=>{
	//		msg.new = false;
	//		cancelReloadTimeout(); // don't auto-reload to clock now
	//		Bangle.messageResponse(msg,false);
	//		checkMessages({clockIfNoMsg:1,clockIfAllRead:1,showMsgIfUnread:1,openMusic:openMusic});
	//	}});
	//}


	//layout = new Layout({ type:"v", c: [
	//	{type:"h", fillx:1, bgCol:g.theme.bg2, col: g.theme.fg2,  c: [
	//		{ type:"v", fillx:1, c: [
	//			{type:"txt", font:fontSmall, label:msg.src||/*LANG*/"Message", bgCol:g.theme.bg2, col: g.theme.fg2, fillx:1, pad:2, halign:1 },
	//			title?{type:"txt", font:titleFont, label:title, bgCol:g.theme.bg2, col: g.theme.fg2, fillx:1, pad:2 }:{},
	//		]},
	//		{ type:"btn",
	//			src:require("messageicons").getImage(msg),
	//			col:require("messageicons").getColor(msg, {settings:settings, default:g.theme.fg2}),
	//			pad: 3, cb:()=>{
	//				cancelReloadTimeout(); // don't auto-reload to clock now
	//				showMessageSettings(msg);
	//			}
	//		},
	//	]},
	//	{type:"txt", font:bodyFont, label:body, fillx:1, filly:1, pad:2, cb:()=>{
	//		// allow tapping to show a larger version
	//		showMessageScroller(msg);
	//	} },
	//	{type:"h",fillx:1, c: buttons}
	//]},{back:goBack});
	//g.reset().clearRect(Bangle.appRect);
	//layout.render();

	showMessageScroller(msg);
}


/* options = {
  clockIfNoMsg : bool
  clockIfAllRead : bool
  showMsgIfUnread : bool
  openMusic : bool      // open music if it's playing
}
*/
function checkMessages(options) {
	options=options||{};

	var goBack = false;
	while (MESSAGES.length && (
		MESSAGES[0].title == "Timer" ||
		MESSAGES[0].title.startsWith("Protostable Chatspace") ||
		MESSAGES[0].body.toLowerCase().startsWith("!chat") ||
		MESSAGES[0].body.toLowerCase().startsWith("! chat")
	)) {
		MESSAGES.pop(0);
		goBack = true;
	}

	if (goBack) {
		return load();
	}

	// If no messages, just show 'no messages' and return
	if (!MESSAGES.length) {
		if (!options.clockIfNoMsg) return E.showPrompt(/*LANG*/"No Messages",{
			title:/*LANG*/"Messages",
			img:require("heatshrink").decompress(atob("kkk4UBrkc/4AC/tEqtACQkBqtUDg0VqAIGgoZFDYQIIM1sD1QAD4AIBhnqA4WrmAIBhc6BAWs8AIBhXOBAWz0AIC2YIC5wID1gkB1c6BAYFBEQPqBAYXBEQOqBAnDAIQaEnkAngaEEAPDFgo+IKA5iIOhCGIAFb7RqAIGgtUBA0VqobFgNVA")),
			buttons : {/*LANG*/"Ok":1}
		}).then(() => { load() });
		return load();
	}

	// we have >0 messages
	var newMessages = MESSAGES.filter(m=>m.new&&m.id!="music");
	// If we have a new message, show it
	if (options.showMsgIfUnread && newMessages.length) {
		delete newMessages[0].show; // stop us getting stuck here if we're called a second time
		showMessage(newMessages[0].id);
		// buzz after showMessage, so being busy during layout doesn't affect the buzz pattern
		if (global.BUZZ_ON_NEW_MESSAGE) {
			// this is set if we entered the messages app by loading `messagegui.new.js`
			// ... but only buzz the first time we view a new message
			global.BUZZ_ON_NEW_MESSAGE = false;
			// messages.buzz respects quiet mode - no need to check here
			require("messages").buzz(newMessages[0].src);
		}
		return;
	}
	// no new messages: show playing music? Only if we have playing music, or state=="show" (set by messagesmusic)
	if (options.openMusic && MESSAGES.some(m=>m.id=="music" && ((m.track && m.state=="play") || m.state=="show")))
		return showMessage('music');
	// no new messages - go to clock?
	if (options.clockIfAllRead && newMessages.length==0)
		return load();
	active = "main";
	// Otherwise show a menu
	E.showScroller({
		h : 48,
		c : Math.max(MESSAGES.length,3), // workaround for 2v10.219 firmware (min 3 not needed for 2v11)
		draw : function(idx, r) {"ram"
			var msg = MESSAGES[idx];
			if (msg && msg.new) g.setBgColor(g.theme.bgH).setColor(g.theme.fgH);
			else g.setBgColor(g.theme.bg).setColor(g.theme.fg);
			g.clearRect(r.x,r.y,r.x+r.w, r.y+r.h);
			if (!msg) return;
			var x = r.x+2, title = msg.title, body = msg.body;
			var img = require("messageicons").getImage(msg);
			if (msg.id=="music") {
				title = msg.artist || /*LANG*/"Music";
				body = msg.track;
			}
			if (img) {
				var fg = g.getColor(),
					col = require("messageicons").getColor(msg, {settings:settings, default:fg});
				g.setColor(col).drawImage(img, x+24, r.y+24, {rotate:0}) // force centering
					.setColor(fg); // only color the icon
				x += 50;
			}
			var m = msg.title+"\n"+msg.body, longBody=false;
			if (title) g.setFontAlign(-1,-1).setFont(fontBig).drawString(title, x,r.y+2);
			if (body) {
				g.setFontAlign(-1,-1).setFont("6x8");
				var l = g.wrapString(body, r.w-(x+14));
				if (l.length>3) {
					l = l.slice(0,3);
					l[l.length-1]+="...";
				}
				longBody = l.length>2;
				g.drawString(l.join("\n"), x+10,r.y+20);
			}
			if (!longBody && msg.src) g.setFontAlign(1,1).setFont("6x8").drawString(msg.src, r.x+r.w-2, r.y+r.h-2);
			g.setColor("#888").fillRect(r.x,r.y+r.h-1,r.x+r.w-1,r.y+r.h-1); // dividing line between items
		},
		select : idx => showMessage(MESSAGES[idx].id),
		back : () => load()
	});
}


function cancelReloadTimeout() {
	if (!unreadTimeout) return;
	clearTimeout(unreadTimeout);
	unreadTimeout = undefined;
}

g.clear();

Bangle.loadWidgets();
require("messages").toggleWidget(false);
Bangle.drawWidgets();

setTimeout(() => {
	if (!isFinite(settings.unreadTimeout)) settings.unreadTimeout=60;
	if (settings.unreadTimeout)
		unreadTimeout = setTimeout(load, settings.unreadTimeout*1000);
	// only openMusic on launch if music is new, or state=="show" (set by messagesmusic)
	var musicMsg = MESSAGES.find(m => m.id === "music");
	checkMessages({
		clockIfNoMsg: 0, clockIfAllRead: 0, showMsgIfUnread: 1,
		openMusic: ((musicMsg&&musicMsg.new) && settings.openMusic) || (musicMsg&&musicMsg.state=="show") });
}, 10); // if checkMessages wants to 'load', do that