// Required packages
const electron = require("electron");
const { dialog } = require("electron");
const updater = require("electron-updater");
const autoUpdater = updater.autoUpdater;
const contextMenu = require("electron-context-menu");
const ProgressBar = require("electron-progressbar");
const path = require("path");

// Attach settings store
const { store } = require("./store");

// Auto upadater
autoUpdater.autoDownload = false;

autoUpdater.on("checking-for-update", function() {});

autoUpdater.on("update-available", function(info) {
  sendStatusToWindow("Update available." + info);
  dialog.showMessageBox(
    mainWindow,
    {
      type: "info",
      title: "Update available",
      message: "A new version of OpenFlexure eV is available.",
      buttons: ["Download", "Later"]
    },
    buttonIndex => {
      if (buttonIndex === 0) {
        console.log("Downloading update selected");
        handleDownloadUpdate();
      }
    }
  );
});

// Download, with a progress bar
function handleDownloadUpdate() {
  console.log("Downloading update");
  var progressBar = new ProgressBar({
    indeterminate: false,
    text: "Downloading update...",
    detail: "Please wait...",
    browserWindow: {
      webPreferences: {
        nodeIntegration: true
      }
    }
  });

  progressBar.on("ready", function() {
    autoUpdater.on("download-progress", function(info) {
      progressBar.value = info.percent;
      progressBar.detail = `${Math.floor(info.percent)}% ${info.bytesPerSecond /
        1000}kb/s`;
    });
    autoUpdater.on("update-downloaded", function() {
      progressBar.close();
    });
    autoUpdater.on("error", function() {
      progressBar.close();
    });
    autoUpdater.downloadUpdate();
  });
}

// Trigger update installation
autoUpdater.on("update-downloaded", function(info) {
  sendStatusToWindow("Update downloaded." + info);
  dialog.showMessageBox(
    mainWindow,
    {
      type: "info",
      title: "Update downloaded",
      message: "Please restart the application to apply the update.",
      buttons: ["Update", "Later"]
    },
    buttonIndex => {
      if (buttonIndex === 0) {
        autoUpdater.quitAndInstall();
      }
    }
  );
});

autoUpdater.on("update-not-available", function() {
  sendStatusToWindow("Update not available.");
});

autoUpdater.on("error", function() {
  sendStatusToWindow("Error in auto-updater.");
});

autoUpdater.on("download-progress", function(progressObj) {
  let log_message = "Download speed: " + progressObj.bytesPerSecond;
  log_message =
    log_message + " - Downloaded " + parseInt(progressObj.percent) + "%";
  log_message =
    log_message +
    " (" +
    progressObj.transferred +
    "/" +
    progressObj.total +
    ")";
  sendStatusToWindow(log_message);
});

function sendStatusToWindow(message) {
  console.log(message);
}

// Set up the app
const app = electron.app;
const BrowserWindow = electron.BrowserWindow;

// Set the window content
let url = `file://${path.join(__dirname, "/dist/index.html")}`;
let mainWindow;

// Set the application menu
require("./menu.js");

// Handle redrawing the mainWindow
let recreatingWindowInProgress = false;

function toggleCustomTitleBar() {
  // Mark window as being recreated, to prevent stopping the application
  recreatingWindowInProgress = true;

  // Invert the drawCustomTitleBar setting
  store.set("drawCustomTitleBar", !store.get("drawCustomTitleBar"));

  // Destroy old window
  mainWindow.destroy();
  // Create new window
  createWindow();

  // Mark window as no longer being recreated
  recreatingWindowInProgress = false;
}

function createWindow() {
  // Create the browser window.
  mainWindow = new BrowserWindow({
    frame: !store.get("drawCustomTitleBar"),
    width: 1200,
    height: 900,
    icon: path.join(__dirname, "/icons/png/64x64.png"),
    webPreferences: {
      nodeIntegration: true
    }
  });

  // Make a context menu
  contextMenu({
    showCopyImageAddress: true,
    showSaveImageAs: true,
    showInspectElement: false
  });

  // Load window contents
  mainWindow.loadURL(url);

  // Check for updates
  autoUpdater.checkForUpdates();

  // Emitted when the window is closed.
  mainWindow.on("closed", function() {
    mainWindow = null; // Dereference the window object
  });

  mainWindow.webContents.on("new-window", function(event, url) {
    event.preventDefault();
    electron.shell.openExternal(url);
  });
}

// Some APIs can only be used after this event occurs.
app.on("ready", () => {
  createWindow();
});

// Quit when all windows are closed.
app.on("window-all-closed", function() {
  if (process.platform !== "darwin" && recreatingWindowInProgress != true) {
    app.quit();
  }
});

app.on("activate", function() {
  if (mainWindow === null) {
    createWindow();
  }
});

// Export toggleCustomTitleBar for use in ./menu.js
module.exports.toggleCustomTitleBar = toggleCustomTitleBar;