"use strict";
var app = Application.currentApplication();
app.includeStandardAdditions = true;
var finder = Application("Finder");

function getResourcesDir() {
	var bundleURL = $.NSBundle.mainBundle.bundleURL;
	if (bundleURL) {
		var bundlePath = bundleURL.path.js;
		return bundlePath + "/Contents/Resources";
	}
	
	var processPath = $.NSProcessInfo.processInfo.processName.js;
	var argCount = $.NSProcessInfo.processInfo.arguments.count;
	throw new Error("Could not determine Resources directory. Process: " + processPath + 
					", Args count: " + argCount + 
					", Bundle path: " + (bundleURL ? bundleURL.path.js : "null"));
}

function isPortableReaper ( dir ) {
	return (
		finder.exists(Path(dir + "/REAPER.app")) ||
		finder.exists(Path(dir + "/REAPER-ARM.app")) ||
		finder.exists(Path(dir + "/REAPER64.app")) ||
		finder.exists(Path(dir + "/REAPER32.app")) )
}

function run(argv) {
	var source = getResourcesDir();
	var s = app.doShellScript;
	var running = false;
	try {
		var code = s("pgrep -x 'REAPER|REAPER64|REAPER-ARM' >/dev/null 2>&1; echo $?");
		running = (code.trim() === "0");
	} catch (ignore) {}
	if (running) {
		app.displayDialog("OSARA cannot be installed while REAPER is running. Please close REAPER then run this installer again.", {
			buttons: ["OK"],
			defaultButton: "OK"
		});
		return;
	}
	 var res = app.displayDialog("Choose whether to install OSARA into a standard or a portable REAPER", {
		buttons: ["Standard REAPER Installation", "Portable REAPER Installation", "Cancel"],
		defaultButton: "Standard REAPER Installation",
		cancelButton: "Cancel"
	});
	var portable = (res.buttonReturned === "Portable REAPER Installation");
	var target;
	if (portable === true) {
		while(true) {
			target = app.chooseFolder({
				withPrompt:"Choose the folder containing your portable REAPER installation:"
			});
			if(isPortableReaper(target)) {
				break;
			} // user chose a folder that doesn't contain Reaper.
			app.displayDialog("The folder you chose does not contain an installation of REAPER.");
		}
	} else {
		target = app.pathTo("home folder") + "/Library/Application Support/REAPER"
	}
	target = target.toString();

	try{
		s(`mkdir -p '${target}/UserPlugins'`);
	} catch (ignore){}// directory probably already exists
	s(`cat '${source}/reaper_osara.dylib' > '${target}/UserPlugins/reaper_osara.dylib'`);
	try{
		s(`mkdir -p '${target}/KeyMaps'`);
	} catch(ignore) {} // directory probably already exists
	s(`cp -f '${source}/OSARA.ReaperKeyMap' '${target}/KeyMaps/'`);
	s(`mkdir -p '${target}/osara/locale'`);
	s(`cp -f '${source}/locale/'* '${target}/osara/locale/'`);
	var res = app.displayDialog(
		"Do you want to replace the existing key map with the OSARA key map?\n\n" +
		"New users are advised to answer Yes, which will completely replace your key map with a clean copy of the OSARA key map including all latest assignments.\n\n" +
		"Answering No will install OSARA without modifying your key map, which may be preferable for experienced users who have prior alterations that they'd like to preserve.", {
		buttons: ["Yes", "No"],
		defaultButton: "Yes"});
	var keymapReplaced = false;
	if(res.buttonReturned==="Yes") {
		keymapReplaced = true;
		try{
			s(`cp '${target}/reaper-kb.ini' '${target}/KeyMaps/OSARAReplacedBackup.ReaperKeyMap'`);
		} catch(ignore) {} // there might not be a keymap to backup
		s(`cp '${target}/KeyMaps/OSARA.ReaperKeyMap' '${target}/reaper-kb.ini'`);
	}
	var finishMessage;
	if (keymapReplaced) {
		finishMessage = "OSARA is installed with its latest key map. A safety backup of your prior key map has been placed in " +
			target + "/KeyMaps/OSARAReplacedBackup.ReaperKeyMap";
	} else {
		finishMessage = "OSARA has been installed with your current key map preserved.";
	}
	app.displayDialog(finishMessage, {
		buttons: ["OK"],
		defaultButton: "OK"
	});
}