#!/usr/bin/env python
from subprocess import Popen, PIPE, STDOUT
from configparser import ConfigParser, DuplicateSectionError
from re import search, IGNORECASE
from justpy import Div, WebPage, SetRoute, justpy

def process(args):
  try:
    # with shell=True args can be a string
    # detached process https://stackoverflow.com/a/65900355/992129 start_new_session
    # https://docs.python.org/3/library/subprocess.html#popen-constructor
    result = Popen(args, stdout=PIPE, stderr=STDOUT, shell=True, start_new_session=True)
    return result.stdout.read().decode("utf-8").rstrip()
  except Exception as e:
    print(f"{e} failed!")

def volume(name):
  return process(f'pamixer --get-volume --sink "{name}"')

def volume_decrease(name):
  return process(f'pamixer --get-volume --sink "{name}" --decrease 5')

def volume_increase(name):
  return process(f'pamixer --get-volume --sink "{name}" --increase 5')

class Button(Div):
  command = None
  def __init__(self, **kwargs):
    super().__init__(**kwargs)
    self.classes = "bg-gray-800 hover:bg-gray-700 w-20 h-20 m-2 p-1 rounded-lg font-bold flex items-center text-center justify-center select-none"
    if self.command is not None:
      def click(self, msg):
        print(self.command)
        # string works only with shell
        if isinstance(self.command, (list)):
          # e.g.: [['pkill', 'ArdourGUI'], ['systemctl', '--user', 'restart', 'pipewire', 'pipewire-pulse'], ['ardour6', '-n', 'productive-pipewire']]
          if isinstance(self.command[0], (list)):
            [process(i) for i in self.command]
          else:
            # e.g.: ['pkill', 'ArdourGUI']
            process(self.command)
        else:
          # e.g.: 'pkill ArdourGUI'
          process(self.command)
      self.on('click', click)

class ButtonSound(Div):
  div = None
  name = None
  description = None
  volume = None

  def __init__(self, **kwargs):
    super().__init__(**kwargs)
    self.classes = "grid-rows-2"
    self.div = Div(classes="flex")
    Button(inner_html=f'{self.description}<br> - 5%', click=self.decrease, a=self.div)
    Button(inner_html=f'{self.description}<br> + 5%', click=self.increase, a=self.div)
    self.add(self.div)
    self.volume = Div(text=f"Volume: {volume(self.name)}%", classes="text-center -mt-2", a=self)

  async def decrease(self, msg):
    self.volume.text = f'Volume: {volume_decrease(self.name)}%'

  async def increase(self, msg):
    self.volume.text = f'Volume: {volume_increase(self.name)}%'

@SetRoute('/')
def application():
  wp = WebPage(title="ControlDeck", body_classes="bg-gray-900")
  wp.head_html = '<meta name="viewport" content="width=device-width, initial-scale=1">'

  # div = Div(classes="flex flex-wrap", a=wp)
  # ButtonSound(name="Stream_sink", description="Stream sink", a=div)
  # div2 = Div(classes="flex flex-wrap", a=wp)
  # Button(text="Sleep", command='systemctl suspend', a=div2)

  config = ConfigParser(strict=False)
  volume_dict = {}
  button_dict = {}
  try:
    config.read('controldeck.conf')
  except Exception as e:
    print(f"{e}")
  #print(config.sections())
  for i in config.sections():
    iname = None
    iname = search("^([0-9]*.?)volume", i, flags=IGNORECASE)
    if iname is not None:
      id = iname.group(1)[:-1]  # remove dot
      try:
        volume_dict[id] += [{'description': i[iname.end(0)+1:],
                             'name': config.get(i, 'name', fallback=None)}]
      except KeyError:
        volume_dict[id] = [{'description': i[iname.end(0)+1:],
                            'name': config.get(i, 'name', fallback=None)}]
    iname = search("^([0-9]*.?)button", i, flags=IGNORECASE)
    if iname is not None:
      id = iname.group(1)[:-1]  # remove dot
      try:
        button_dict[id] += [{'text': i[iname.end(0)+1:],
                             'command': config.get(i, 'command', fallback=None)}]
      except KeyError:
        button_dict[id] = [{'text': i[iname.end(0)+1:],
                            'command': config.get(i, 'command', fallback=None)}]
  for i in volume_dict:
    for j in volume_dict[i]:
      if 'div'+i not in vars():
        vars()['div'+i] = Div(classes="flex flex-wrap", a=wp)
      ButtonSound(name=j['name'], description=j['description'], a=eval('div'+i))
  for i in button_dict:
    for j in button_dict[i]:
      if 'div'+i not in vars():
        vars()['div'+i] = Div(classes="flex flex-wrap", a=wp)
      Button(text=j['text'], command=j['command'], a=eval('div'+i))

  if not wp.components:
    # config not found or empty, therefore insert an empty div to not get an error
    Div(text="add elements in controldeck.conf", classes="flex flex-wrap", a=wp)

  return wp

if __name__ == '__main__':
  justpy()