'use strict';

var electron = require('electron');
var app = electron.app;  // Module to control application life.
var BrowserWindow = electron.BrowserWindow;


var Menu = require('menu');
var Tray = require('tray');
var shell = require('shell');
var os = require('os');
var childProcess = require('child_process');
var path = require('path');
var fs = require('fs');
var Tail = require('always-tail');
var http = require('http');
var path = require('path');

var hfprocess = require('./modules/hf-process.js');
var Process = hfprocess.Process;
var ACMonitorProcess = hfprocess.ACMonitorProcess;
var ProcessStates = hfprocess.ProcessStates;
var ProcessGroup = hfprocess.ProcessGroup;
var ProcessGroupStates = hfprocess.ProcessGroupStates;

function getApplicationDataDirectory() {
    var osType = os.type();
    var rootDirectory;
    if (osType == 'Windows_NT') {
        rootDirectory = process.env.APPDATA;
    } else if (osType == 'Darwin') {
        rootDirecotry = process.env.HOME + 'Library/Application Support';
    } else {
        rootDirectory = '/usr/local/share';
    }
    return path.join(rootDirectory, '/High Fidelity/Console');
}


const ipcMain = electron.ipcMain;

const osType = os.type();

var isShuttingDown = false;
function shutdown() {
    if (!isShuttingDown) {
        isShuttingDown = true;
        logWindow.close();
        homeServer.stop();

        var timeoutID = setTimeout(app.quit, 5000);
        homeServer.on('state-update', function(processGroup) {
            if (processGroup.state == ProcessGroupStates.STOPPED) {
                clearTimeout(timeoutID);
                app.quit();
            }
        });

        updateTrayMenu(null);
    }
}


var logPath = path.join(getApplicationDataDirectory(), '/logs');
console.log("Log directory:", logPath);

const TRAY_FILENAME = (osType == "Darwin" ? "console-tray-Template.png" : "console-tray.png");
const TRAY_ICON = path.join(__dirname, '../resources/' + TRAY_FILENAME);
const APP_ICON = path.join(__dirname, '../resources/console.png');

// print out uncaught exceptions in the console
process.on('uncaughtException', function(err) {
    console.error(err);
    console.error(err.stack);
});

var shouldQuit = app.makeSingleInstance(function(commandLine, workingDirectory) {
    // Someone tried to run a second instance, focus the window (if there is one)
    return true;
});

if (shouldQuit) {
    app.quit();
    return;
}

// Check command line arguments to see how to find binaries
var argv = require('yargs').argv;
var pathFinder = require('./modules/path-finder.js');

var interfacePath = null;
var dsPath = null;
var acPath = null;

var debug = argv.debug;


if (argv.localDebugBuilds || argv.localReleaseBuilds) {
    interfacePath = pathFinder.discoveredPath("Interface", argv.localReleaseBuilds);
    dsPath = pathFinder.discoveredPath("domain-server", argv.localReleaseBuilds);
    acPath = pathFinder.discoveredPath("assignment-client", argv.localReleaseBuilds);
}

// if at this point any of the paths are null, we're missing something we wanted to find
// TODO: show an error for the binaries that couldn't be found

function openFileBrowser(path) {
    // Add quotes around path
    path = '"' + path + '"';
    if (osType == "Windows_NT") {
        console.log('start "" ' + path);
        childProcess.exec('start "" ' + path);
    } else if (osType == "Darwin") {
        childProcess.exec('open ' + path);
    } else if (osType == "Linux") {
        childProcess.exec('xdg-open ' + path);
    }
}

app.on('window-all-closed', function() {
});

function startInterface(url) {
    var argArray = [];

    // check if we have a url parameter to include
    if (url) {
        argArray = ["--url", url];
    }

    // create a new Interface instance - Interface makes sure only one is running at a time
    var pInterface = new Process('interface', interfacePath, argArray);
    pInterface.start();
}

var tray = null;
global.homeServer = null;
global.domainServer = null;
global.acMonitor = null;

const GO_HOME_INDEX = 0;
const SERVER_LABEL_INDEX = 2;
const RESTART_INDEX = 3;
const STOP_INDEX = 4;
const SETTINGS_INDEX = 5;

function buildMenuArray(serverState) {
    var menuArray = [
        {
            label: 'Go Home',
            click: function() { startInterface('hifi://localhost'); },
            enabled: false
        },
        {
            type: 'separator'
        },
        {
            label: "Server - Stopped",
            enabled: false
        },
        {
            label: "Start",
            click: function() { homeServer.restart(); }
        },
        {
            label: "Stop",
            visible: false,
            click: function() { homeServer.stop(); }
        },
        {
            label: "Settings",
            click: function() { shell.openExternal('http://localhost:40100/settings'); },
            enabled: false
        },
        {
            label: "View Logs",
            click: function() { openFileBrowser(logPath); }
        },
        {
            type: 'separator'
        },
        {
            label: 'Quit',
            accelerator: 'Command+Q',
            click: function() { app.quit(); }
        }
function buildMenuArray(serverState) {
    var menuArray = null;
    if (isShuttingDown) {
        menuArray = [
            {
                label: "Shutting down...",
                enabled: false
            }
        ];
    } else {
        menuArray = [
            {
                label: 'Go Home',
                click: function() { startInterface('hifi://localhost'); },
                enabled: false
            },
            {
                type: 'separator'
            },
            {
                label: "Server - Stopped",
                enabled: false
            },
            {
                label: "Start",
                click: function() { homeServer.restart(); }
            },
            {
                label: "Stop",
                visible: false,
                click: function() { homeServer.stop(); }
            },
            {
                label: "Settings",
                click: function() { shell.openExternal('http://localhost:40100/settings'); },
                enabled: false
            },
            {
                label: "View Logs",
                click: function() { logWindow.open(); }
            },
            {
                label: "Open Log Directory",
                click: function() { openFileBrowser(logPath); }
            },
            {
                type: 'separator'
            },
            {
                label: 'Quit',
                accelerator: 'Command+Q',
                click: function() { shutdown(); }
            }
        ];

        updateMenuArray(menuArray, serverState);
    }


    return menuArray;
}

function updateMenuArray(menuArray, serverState) {
    // update the tray menu state
    var running = serverState == ProcessGroupStates.STARTED;

    var serverLabelItem = menuArray[SERVER_LABEL_INDEX];
    var restartItem = menuArray[RESTART_INDEX];

    // Go Home is only enabled if running
    menuArray[GO_HOME_INDEX].enabled = running;

    // Stop is only visible if running
    menuArray[STOP_INDEX].visible = running;

    // Settings is only visible if running
    menuArray[SETTINGS_INDEX].enabled = running;

    if (serverState == ProcessGroupStates.STARTED) {
        serverLabelItem.label = "Server - Started";
        restartItem.label = "Restart";
    } else if (serverState == ProcessGroupStates.STOPPED) {
        serverLabelItem.label = "Server - Stopped";
        restartItem.label = "Start";
    } else if (serverState == ProcessGroupStates.STOPPING) {
        serverLabelItem.label = "Server - Stopping";
        restartItem.label = "Restart";
        restartItem.enabled = false;
    }
}

function updateTrayMenu(serverState) {
    if (tray) {
        var menuArray = buildMenuArray(serverState);
        tray.setContextMenu(Menu.buildFromTemplate(menuArray));
        if (isShuttingDown) {
            tray.setToolTip('High Fidelity - Shutting Down');
        }
    }
}

const httpStatusPort = 60332;

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
app.on('ready', function() {

    if (app.dock) {
        // hide the dock icon on OS X
        app.dock.hide()
    }

    // Create tray icon
    tray = new Tray(TRAY_ICON);
    tray.setToolTip('High Fidelity');

    updateTrayMenu(ProcessGroupStates.STOPPED);

    if (interfacePath && dsPath && acPath) {
        domainServer = new Process('domain-server', dsPath, [], logPath);
        acMonitor = new ACMonitorProcess('ac-monitor', acPath, ['-n4',
                                                                    '--log-directory', logPath,
                                                                    '--http-status-port', httpStatusPort], httpStatusPort, logPath);
        homeServer = new ProcessGroup('home', [domainServer, acMonitor]);
        logWindow = new LogWindow(acMonitor, domainServer);

        // make sure we stop child processes on app quit
        app.on('quit', function(){
            homeServer.stop();
        });

        var processes = {
            home: homeServer
        };

        // handle process updates
        homeServer.on('state-update', function(processGroup) { updateTrayMenu(processGroup.state); });

        // start the home server
        homeServer.start();
    }
});