# pylint: disable=C0111,R0903

'''Shows free diskspace, total diskspace and the percentage of free disk space.

Parameters:
    * disk.warning: Warning threshold in % of disk space (defaults to 80%)
    * disk.critical: Critical threshold in % of disk space (defaults ot 90%)
    * disk.path: Path to calculate disk usage from (defaults to /)
    * disk.open: Which application / file manager to launch (default xdg-open)
    * disk.format: Format string, tags {path}, {used}, {left}, {size} and {percent} (defaults to '{path} {used}/{size} ({percent:05.02f}%)')
'''

import os

import core.module
import core.widget
import core.input

import util.format

class Module(core.module.Module):
    def __init__(self, config=None):
        super().__init__(config, core.widget.Widget(self.diskspace))

        self._path = self.parameter('path', '/')
        self._format = self.parameter('format', '{used}/{size} ({percent:05.02f}%)')

        self._used = 0
        self._left = 0
        self._size = 0
        self._percent = 0

        core.input.register(self, button=core.input.LEFT_MOUSE,
            cmd='{} {}'.format(self.parameter('open', 'xdg-open'), self._path))

    def diskspace(self, widget):
        used_str = util.format.byte(self._used)
        size_str = util.format.byte(self._size)
        left_str = util.format.byte(self._left)
        percent_str = self._percent

        return self._format.format(path=self._path,
           used=used_str,
           left=left_str,
           size=size_str,
           percent=percent_str)

    def update(self):
        st = os.statvfs(self._path)
        self._size = st.f_blocks * st.f_frsize
        self._used = (st.f_blocks - st.f_bfree) * st.f_frsize
        self._left = self._size - self._used;
        self._percent = 100.0 * self._used/self._size

    def state(self, widget):
        return self.threshold_state(self._percent, 80, 90)

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