/* eslint-disable mozilla/no-arbitrary-setTimeout */
let NS_OSX_PICTURE_DOCUMENTS_DIR = "Pct";
let NS_MAC_USER_LIB_DIR = "ULibDir";

/**
 * Tests "Set As Desktop Background" on macOS.
 */
add_task(async function() {
  await BrowserTestUtils.withNewTab(
    {
      gBrowser,
      url: "about:logo",
    },
    async browser => {
      let dirSvc = Cc["@mozilla.org/file/directory_service;1"].getService(
        Ci.nsIDirectoryServiceProvider
      );

      let desktopBackgroundDb = dirSvc.getFile(NS_MAC_USER_LIB_DIR, {});
      desktopBackgroundDb.append("Application Support");
      desktopBackgroundDb.append("Dock");
      let desktopBackgroundDbBackup = desktopBackgroundDb.clone();
      desktopBackgroundDb.append("desktoppicture.db");
      desktopBackgroundDbBackup.append("desktoppicture.db.backup");

      ok(
        desktopBackgroundDb.exists(),
        "Desktop background database must exist for test to run."
      );

      if (desktopBackgroundDbBackup.exists()) {
        desktopBackgroundDbBackup.remove(false);
      }

      desktopBackgroundDb.copyTo(null, desktopBackgroundDbBackup.leafName);

      let wpFile = dirSvc.getFile(NS_OSX_PICTURE_DOCUMENTS_DIR, {});
      wpFile.append("logo.png");
      if (wpFile.exists()) {
        wpFile.remove(false);
      }

      let shell = Cc["@mozilla.org/browser/shell-service;1"].getService(
        Ci.nsIShellService
      );

      // For simplicity, we're going to reach in and access the image on the
      // page directly, which means the page shouldn't be running in a remote
      // browser. Thankfully, about:logo runs in the parent process for now.
      Assert.ok(
        !gBrowser.selectedBrowser.isRemoteBrowser,
        "image can be accessed synchronously from the parent process"
      );

      let image = gBrowser.selectedBrowser.contentDocument.images[0];
      shell.setDesktopBackground(image, 0, "logo.png");

      await BrowserTestUtils.waitForCondition(() => wpFile.exists());
      info("Desktop background was written to disk.");

      desktopBackgroundDbBackup.moveTo(null, desktopBackgroundDb.leafName);
      wpFile.remove(false);

      // Restart Dock to reload previous background image.
      let killall = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
      killall.initWithPath("/usr/bin/killall");
      let dockArg = ["Dock"];
      let process = Cc["@mozilla.org/process/util;1"].createInstance(
        Ci.nsIProcess
      );
      process.init(killall);
      process.run(true, dockArg, 1);
    }
  );
});