#!/usr/bin/env python3

"""
Debugging script
"""

import i3ipc
import os
import psutil
# import alsaaudio
from time import time
import subprocess

i3 = i3ipc.Connection()
lemonbar = subprocess.Popen(['lemonbar', '-b'], stdin=subprocess.PIPE)

# Utils
def upChart(p):
    block = ' ▁▂▃▄▅▆▇█'
    return block[round(p * (len(block)-1))]

def humanSizeOf(num, suffix='B'): # TODO Credit
    for unit in ['','Ki','Mi','Gi','Ti','Pi','Ei','Zi']:
        if abs(num) < 1024.0:
            return "%3.0f%2s%s" % (num, unit, suffix)
        num /= 1024.0
    return "%.0f%2s%s" % (num, 'Yi', suffix)

# Values
mode = ''
container = i3.get_tree().find_focused()
workspaces = i3.get_workspaces()
outputs = i3.get_outputs()

username = os.environ['USER']
hostname = os.environ['HOSTNAME']
if '-' in hostname:
    hostname = hostname.split('-')[-1]

oldNetIO = dict()
oldTime = time()

def update():
    activeOutputs = sorted(sorted(list(filter(lambda o: o.active, outputs)), key=lambda o: o.rect.y), key=lambda o: o.rect.x)
    z = ''
    for aOutput in range(len(activeOutputs)):
        output = activeOutputs[aOutput]
        # Mode || Workspaces
        t = []
        if (mode != ''):
            t.append(mode)
        else:
            t.append(' '.join([(w.name.upper() if w.focused else w.name) for w in workspaces if w.output == output.name]))

        # Windows Title
        #if container:
        #    t.append(container.name)

        # CPU
        t.append('C' + ''.join([upChart(p/100) for p in psutil.cpu_percent(percpu=True)]))

        # Memory
        t.append('M' + str(round(psutil.virtual_memory().percent)) + '% ' +
                 'S' + str(round(psutil.swap_memory().percent)) + '%')

        # Disks
        d = []
        for disk in psutil.disk_partitions():
            e = ''
            if disk.device.startswith('/dev/sd'):
                e += 'S' + disk.device[-2:].upper()
            elif disk.device.startswith('/dev/mmcblk'):
                e += 'M' + disk.device[-3] + disk.device[-1]
            else:
                e += '?'
            e += ' '
            e += str(round(psutil.disk_usage(disk.mountpoint).percent)) + '%'
            d.append(e)
        t.append(' '.join(d))

        # Network
        netStats = psutil.net_if_stats()
        netIO = psutil.net_io_counters(pernic=True)
        net = []
        for iface in filter(lambda i: i != 'lo' and netStats[i].isup, netStats.keys()):
            s = ''
            if iface.startswith('eth'):
                s += 'E'
            elif iface.startswith('wlan'):
                s += 'W'
            else:
                s += '?'

            s += ' '
            now = time()
            global oldNetIO, oldTime

            sent = ((oldNetIO[iface].bytes_sent if iface in oldNetIO else 0) - (netIO[iface].bytes_sent if iface in netIO else 0)) / (oldTime - now)
            recv = ((oldNetIO[iface].bytes_recv if iface in oldNetIO else 0) - (netIO[iface].bytes_recv if iface in netIO else 0)) / (oldTime - now)
            s += '↓' + humanSizeOf(abs(recv), 'B/s') + ' ↑' + humanSizeOf(abs(sent), 'B/s')

            oldNetIO = netIO
            oldTime = now

            net.append(s)
        t.append(' '.join(net))

        # Battery
        if os.path.isdir('/sys/class/power_supply/BAT0'):
            with open('/sys/class/power_supply/BAT0/charge_now') as f:
                charge_now = int(f.read())
            with open('/sys/class/power_supply/BAT0/charge_full_design') as f:
                charge_full = int(f.read())
            t.append('B' + str(round(100*charge_now/charge_full)) + '%')

        # Volume
        # t.append('V ' + str(alsaaudio.Mixer('Master').getvolume()[0]) + '%')

        t.append(username + '@' + hostname)

        # print(' - '.join(t))
        # t = [output.name]

        z += ' - '.join(t) + '%{S' + str(aOutput + 1) + '}'
        #lemonbar.stdin.write(bytes(' - '.join(t), 'utf-8'))
        #lemonbar.stdin.write(bytes('%{S' + str(aOutput + 1) + '}', 'utf-8'))

    lemonbar.stdin.write(bytes(z+'\n', 'utf-8'))
    lemonbar.stdin.flush()

# Event listeners
def on_mode(i3, e):
    global mode
    if (e.change == 'default'):
        mode = ''
    else :
        mode = e.change
    update()

i3.on("mode", on_mode)

#def on_window_focus(i3, e):
#    global container
#    container = e.container
#    update()
#
#i3.on("window::focus", on_window_focus)

def on_workspace_focus(i3, e):
    global workspaces
    workspaces = i3.get_workspaces()
    update()

i3.on("workspace::focus", on_workspace_focus)

# Starting

update()


i3.main()