import subprocess, os, getpass
from enum import Enum

import i3_lemonbar_config as config

kill_on_unfocus = []

# Loggers, initialized in main function
logger = None
health_logger = None

screen = None
parsing_queue = None

class bar_mode(Enum):
    power, normal, control = range(-1,2) # Don't cycle through power

    def cycle(self):
        try:
            return bar_mode(self.value + 1)
        except ValueError:
            return bar_mode(0)

mode = bar_mode.normal

floatterm_args = lambda prog : ['terminator', '-r', 'FLOAT_TERM', '-p'
        , 'dark', '-e', 'echo kill_unfocus $$ > {}; exec {}'.format(
            config.fifo_file_executor, prog)]
def date_comm(args):
    subprocess.Popen(['yad', '--no-buttons', '--calendar', '--sticky'
        , '--on-top' , '--class' , '"YADWIN"', '--posx=1650', '--posy=24'
        , '--close-on-unfocus'])

def pavu_comm(args):
    global kill_on_unfocus
    p = subprocess.Popen(['pavucontrol', '--class=FLOAT_PAVU'])
    kill_on_unfocus.append(p.pid)

def htop_comm(args):
    subprocess.Popen(floatterm_args('htop'))

def nmtui_comm(args):
    subprocess.Popen(floatterm_args('nmtui'))
def lang_comm(args):
    subprocess.Popen(['sh', '/home/kuba/.i3/scripts/lang.sh', 'next'])
def dpms_comm(args):
    subprocess.Popen(['sh', '/home/kuba/.i3/scripts/dpmsctl.sh'])
def adj_br(args):
    subprocess.Popen(['/home/kuba/.i3/scripts/adjbr.sh', '-b', config.fifo_file_executor])
def i3msg_comm(args):
    subprocess.Popen(args.split())
def add_tokill(args):
    global kill_on_unfocus
    kill_on_unfocus.append(int(args.split()[1]))
def set_mode(args):
    global mode
    new_mode = args.split()[1]
    if new_mode == "cycle":
        mode = mode.cycle()

    for m in bar_mode:
        if new_mode == m.name:
            mode = m
            break
def bluetooth(args):
    btcargs = args.split()[1:]
    btcargs = [a.replace('pxc550', '00:16:94:22:29:0E') for a in btcargs]
    inp = ' '.join(btcargs)
    screen.send_cmd('bluetoothctl ' + inp)

show_secs = False
def toggle_secs(args):
    global show_secs
    show_secs = not show_secs

# Keymaps
def_keymap = 'pl'
keymaps = {'Firefox': 'se'}
cur_class = ''
def set_lang(args):
    global keymaps
    lang = args.split()[1]
    keymaps[cur_class] = lang

commands_dict = {'toggle_secs': toggle_secs
                ,'date': date_comm
                ,'pavu': pavu_comm
                ,'load': htop_comm
                ,'wlan': nmtui_comm
                ,'dpms': dpms_comm
                ,'i3-msg': i3msg_comm
                ,'switch_lang': lang_comm
                ,'kill_unfocus': add_tokill
                ,'mode': set_mode
                ,'adj_br': adj_br
                ,'setlang': set_lang
                ,'bluetooth': bluetooth
                }

# Callbacks for workspaces
def add_callbacks(i3ws):
    i3ws.change_callbacks.append(set_bg)
    i3ws.focus_callbacks.append(set_keymap)
    i3ws.focus_callbacks.append(kill_floating_windows)

def img_path(num):
    dir = '/home/kuba/Obrazy/Wallpapers/'
    return dir + {
        1: '1_main',
        2: '2_web',
        3: '3_music',
        4: '4_work',
        5: '5_terms',
        6: '6_stats',
        7: '7',
        8: '8',
        9: '9',
    }.get(int(num), 'default')

def set_bg(i3ws):
    cmd_args = ['sh', '/home/kuba/scripts/set_bg.sh']
    for output in i3ws.outputs:
        if output.active:
            bg = img_path(output.current_workspace.partition(' ')[0])
            cmd_args.append(bg)
    subprocess.call(cmd_args)

def kill_floating_windows(i3ws):
    global kill_on_unfocus, logger
    role   = i3ws.focused_window.window_role
    wclass = i3ws.focused_window.window_class

    if role != 'FLOAT_TERM' and wclass != 'FLOAT_PAVU' and wclass != 'YADWINBR':
        # Is there a window that the bar has opened?
        for pid in kill_on_unfocus:
            try:
                os.kill(pid, signal.SIGTERM)
            except ProcessLookupError:
                logger.debug('Tried killing process {} but it doesn\'t exist'.format(pid))
        kill_on_unfocus = []

def set_keymap(i3ws):
    global cur_class, keymaps, logger
    wclass = i3ws.focused_window.window_class
    cur_class = wclass

    if wclass in keymaps:
        new_km = keymaps[wclass]
        logger.debug('Setting {} as keymap for {}'.format(new_km, wclass))
    else:
        new_km = def_keymap
        logger.debug('Setting default keymap {} for {}'.format(def_keymap, wclass))
    subprocess.call(['/home/kuba/.i3/scripts/lang.sh', 'qset', new_km])

def create_new_fifo(fifo_file):
    """
    Create new fifo file, removing old one if it exists
    """
    try:
        os.remove(fifo_file)
        logger.debug('''Removed old fifo file''')
    except OSError:
        logger.debug('''No old fifo file, good''')

    try:
        os.mkfifo(fifo_file)
    except OSError:
        logger.error('''Failed, couldn't create fifo file''')
        os.remove(config.pid_file) # Clean up own PID file
        sys.exit(0)

class LemonbarScreen:
    # Start, stop and send commands to screen instance

    # Start detached, in UTF-8 mode. Log to fifo
    start_flags = ['-d', '-m', '-U', '-L', '-Logfile', config.fifo_screen_log]

    def __init__(self):
        self.identifier = 'lemonbar_{}_{}'.format(getpass.getuser(), os.getpid())

        create_new_fifo(config.fifo_screen_log)
        self.send(self.start_flags)          # Start screen
        self.send_cmd('stty -echo')          # Do not echo what is written to screen terminal
        self.send_colon('logfile flush 0.1') # Log quickly

    def destroy(self):
        self.send_colon('kill')

    def send(self, args):
        # Send something to our screen instance
        subprocess.call(['screen', '-S', self.identifier] + args)

    def send_cmd(self, cmd):
        # Send terminal input to our screen instance
        self.send(['-X', 'stuff', cmd + '\n'])

    def send_colon(self, cmd):
        # Send colon command to our screen instance
        self.send(['-X', 'colon', cmd + '\n'])