#!/usr/bin/env python2

"""Youtubedlg module that contains util functions. 

Attributes:
    YOUTUBEDL_BIN (string): Youtube-dl binary filename.

"""


import os
import sys
import subprocess


YOUTUBEDL_BIN = 'youtube-dl'
if os.name == 'nt':
    YOUTUBEDL_BIN += '.exe'


def remove_shortcuts(path):
    """Return given path after removing the shortcuts. """
    path = path.replace('~', os.path.expanduser('~'))
    return path


def absolute_path(filename):
    """Return absolute path of the given file. """
    path = os.path.realpath(os.path.abspath(filename))
    return os.path.dirname(path)


def open_dir(path):
    """Open path using default file navigator. """
    path = remove_shortcuts(path)
    
    if os.name == 'nt':
        os.startfile(path)
    else:
        subprocess.call(('xdg-open', path))


def check_path(path):
    """Create path if not exist. """
    if not os.path.exists(path):
        os.makedirs(path)


def get_config_path():
    """Return user config path.
    
    Note:
        Windows = %AppData%
        Linux   = ~/.config

    """
    if os.name == 'nt':
        path = os.getenv('APPDATA')
    else:
        path = os.path.join(os.path.expanduser('~'), '.config')

    return path


def shutdown_sys(password=''):
    """Shuts down the system. 
    
    Args:
        password (string): SUDO password for linux.
        
    Note:
        On Linux you need to provide sudo password if you don't 
        have admin prev.
    
    """
    if os.name == 'nt':
        subprocess.call(['shutdown', '/s', '/t', '1'])
    else:
        if not password:
            subprocess.call(['/sbin/shutdown', '-h', 'now'])
        else:
            subprocess.Popen(['sudo', '-S', '/sbin/shutdown', '-h', 'now'],
                             stdin=subprocess.PIPE).communicate(password + '\n')


def get_time(seconds):
    """Convert given seconds to days, hours, minutes and seconds.
    
    Args:
        seconds (float): Time in seconds.
        
    Returns:
        Dictionary that contains the corresponding days, hours, minutes
        and seconds of the given seconds.
    
    """
    dtime = dict(seconds=0, minutes=0, hours=0, days=0)

    dtime['days'] = int(seconds / 86400)
    dtime['hours'] = int(seconds % 86400 / 3600)
    dtime['minutes'] = int(seconds % 86400 % 3600 / 60)
    dtime['seconds'] = round((seconds % 86400 % 3600 % 60), 2)

    return dtime


def get_icon_file():
    """Search for youtube-dlg app icon.
    
    Returns:
        The path to youtube-dlg icon file if exists. Else returns None.
        
    Note:
        Paths that get_icon_file() function searches.
        
        Windows: __main__ directory.
        Linux: __main__ directory, $XDG_DATA_DIRS and /usr/share/pixmaps.
        
    """
    SIZES = ('256x256', '128x128', '64x64', '48x48', '32x32', '16x16')
    ICON_NAME = 'youtube-dl-gui_%s.png'

    ICONS_LIST = [ICON_NAME % size for size in SIZES]

    # __main__ dir
    path = os.path.join(absolute_path(sys.argv[0]), 'icons')

    for icon in ICONS_LIST:
        icon_file = os.path.join(path, icon)

        if os.path.exists(icon_file):
            return icon_file

    if os.name != 'nt':
        # $XDG_DATA_DIRS/icons
        path = os.getenv('XDG_DATA_DIRS')

        if path is not None:
            for xdg_path in path.split(':'):
                xdg_path = os.path.join(xdg_path, 'icons', 'hicolor')

                for size in SIZES:
                    icon_name = ICON_NAME % size
                    icon_file = os.path.join(xdg_path, size, 'apps', icon_name)

                    if os.path.exists(icon_file):
                        return icon_file

        # /usr/share/pixmaps
        path = '/usr/share/pixmaps'
        
        for icon in ICONS_LIST:
            icon_file = os.path.join(path, icon)

            if os.path.exists(icon_file):
                return icon_file

    return None