# -*- coding: utf-8 -*-

import sardine

import os
import subprocess


class TrackData(object):

    _field_names = ['state', 'artist', 'album', 'song', 'ct', 'tt']

    def __init__(self):
        self.state = None
        self.artist = None
        self.album = None
        self.song = None
        self.ct = None  # current time
        self.tt = None  # total time
        self._is_loaded = False

    def is_playing(self):
        if not self._is_loaded:
            self.load()
        return any((self.artist, self.album, self.song, self.ct, self.tt))

    def load(self):
        FNULL = open(os.devnull, 'w+')
        for fieldname in self.__class__._field_names:
            value = subprocess.check_output(['mocp', '-Q', "%" + fieldname],
                                            stderr=FNULL).strip()
            if value:
                setattr(self, fieldname, value)
        self._is_loaded = True


class MocTitler(object):

    def __init__(self):
        self.title = "(unknown)"
        self.td = TrackData()

    def assemble_title(self):
        """Assemble the data to human-readable format"""
        d = self.td
        title = ""
        title += "(%s)" % d.state
        if d.is_playing():
            title += " "
            title += d.artist if d.artist else ""
            title += " " if d.artist and d.album else ""
            title += "[%s]" % d.album if d.album else ""
            if (d.artist or d.album) and (d.song or d.tt):
                title += ": "
            title += d.song if d.song else ""
            title += " (%s/%s)" % (d.ct, d.tt) if d.tt else ""

        return title

    def get_title(self):
        """Get title or explaining message"""
        try:
            self.td.load()
            return self.assemble_title()
        except subprocess.CalledProcessError:
            return "(not running)"


class Plugin(sardine.BasePlugin):

    name = "moc"

    def render_plain(self):
        return MocTitler().get_title()