package funkin.util;

import flixel.util.FlxSignal.FlxTypedSignal;

using StringTools;

/**
 * Utilities for operating on the current window, such as changing the title.
 */
#if (cpp && windows)
@:cppFileCode('
#include <iostream>
#include <windows.h>
#include <psapi.h>
')
#end
class WindowUtil
{
  /**
   * Runs platform-specific code to open a URL in a web browser.
   * @param targetUrl The URL to open.
   */
  public static function openURL(targetUrl:String):Void
  {
    #if CAN_OPEN_LINKS
    #if linux
    Sys.command('/usr/bin/xdg-open', [targetUrl, '&']);
    #else
    // This should work on Windows and HTML5.
    FlxG.openURL(targetUrl);
    #end
    #else
    throw 'Cannot open URLs on this platform.';
    #end
  }

  /**
   * Runs platform-specific code to open a path in the file explorer.
   * @param targetPath The path to open.
   */
  public static function openFolder(targetPath:String):Void
  {
    #if CAN_OPEN_LINKS
    #if windows
    Sys.command('explorer', [targetPath.replace('/', '\\')]);
    #elseif mac
    Sys.command('open', [targetPath]);
    #elseif linux
    Sys.command('open', [targetPath]);
    #end
    #else
    throw 'Cannot open URLs on this platform.';
    #end
  }

  /**
   * Runs platform-specific code to open a file explorer and select a specific file.
   * @param targetPath The path of the file to select.
   */
  public static function openSelectFile(targetPath:String):Void
  {
    #if CAN_OPEN_LINKS
    #if windows
    Sys.command('explorer', ['/select,' + targetPath.replace('/', '\\')]);
    #elseif mac
    Sys.command('open', ['-R', targetPath]);
    #elseif linux
    // TODO: unsure of the linux equivalent to opening a folder and then "selecting" a file.
    Sys.command('open', [targetPath]);
    #end
    #else
    throw 'Cannot open URLs on this platform.';
    #end
  }

  /**
   * Dispatched when the game window is closed.
   */
  public static final windowExit:FlxTypedSignal<Int->Void> = new FlxTypedSignal<Int->Void>();

  /**
   * Wires up FlxSignals that happen based on window activity.
   * For example, we can run a callback when the window is closed.
   */
  public static function initWindowEvents():Void
  {
    // onUpdate is called every frame just before rendering.

    // onExit is called when the game window is closed.
    openfl.Lib.current.stage.application.onExit.add(function(exitCode:Int) {
      windowExit.dispatch(exitCode);
    });
  }

  /**
   * Turns off that annoying "Report to Microsoft" dialog that pops up when the game crashes.
   */
  public static function disableCrashHandler():Void
  {
    #if (cpp && windows)
    untyped __cpp__('SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX);');
    #else
    // Do nothing.
    #end
  }

  /**
   * Sets the title of the application window.
   * @param value The title to use.
   */
  public static function setWindowTitle(value:String):Void
  {
    lime.app.Application.current.window.title = value;
  }
}