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# -*- python -*-

# A moderate xpybar configuration example that has a few monitors that are updates continuously

import os
import time

from plugins.clock import Clock
from plugins.cpu import CPU
from plugins.mem import Memory
from plugins.network import Network
from plugins.users import Users
from plugins.pacman import Pacman
from plugins.uname import Uname
from plugins.weather import Weather
from plugins.chase import Chase
from plugins.solar import Solar


OUTPUT, YPOS, TOP = 0, 24, True

clock_ = Clock(format = '%Y-(%m)%b-%d %T, %a w%V, %Z', sync_to = 0.5)


def memory():
    memory_ = Memory()
    def colourise(value, format = '%.0f'):
        colour = '39'
        if value > 30:  colour = '32'
        if value > 50:  colour = '33'
        if value > 80:  colour = '31'
        return '\033[%sm%s\033[0m%%' % (colour, format % value)
    mem = 'Mem: ' + colourise(memory_.mem_used * 100 / memory_.mem_total)
    swp = 'Swp: ' + colourise(memory_.swap_used * 100 / memory_.swap_total)
    shm = 'Shm: ' + colourise(memory_.shmem * 100 / memory_.mem_total)
    return '%s │ %s │ %s' % (mem, swp, shm)


def users():
    users_ = Users().users
    you = os.environ['USER']
    def colour_user(user):
        if user == 'root':     return '\033[31m%s\033[39m'
        elif not user == you:  return '\033[33m%s\033[39m'
        else:                  return '%s'
    users = ['%s{%i}' % (colour_user(u) % u, len(users_[u])) for u in users_.keys()]
    users = 'Users: %s' % (' '.join(users))
    return users


have_linux_libre, have_pacman = True, None
linux_installed, linux_latest = None, None
def uname():
    global have_linux_libre, have_pacman, linux_installed, linux_latest
    
    if have_pacman is None:
        try:
            linux_installed = Pacman('linux-libre', True)
        except:
            have_linux_libre = False
            try:
                linux_installed = Pacman('linux', True)
            except:
                have_pacman = False
        if have_pacman:
            try:
                linux_latest = Pacman('linux-libre' if have_linux_libre else 'linux', False)
            except:
                have_pacman = None
    elif have_pacman:
        try:
            linux_installed = Pacman('linux-libre' if have_linux_libre else 'linux', True)
            linux_latest = Pacman('linux-libre' if have_linux_libre else 'linux', False)
        except:
            have_pacman = None
    
    uname_ = Uname()
    nodename = uname_.nodename
    kernel_release = uname_.kernel_release
    operating_system = uname_.operating_system
    if (have_pacman is not None) and have_pacman:
        linux_running = kernel_release.split('-')
        linux_running, kernel_release = linux_running[:2], linux_running[2:]
        linux_running = '-'.join(linux_running)
        kernel_release = '-' + '-'.join(kernel_release)
        linux_installed = linux_installed.version
        linux_latest = linux_latest.version
        if linux_installed == linux_latest:
            if linux_running == linux_installed:
                linux_running = '\033[32m%s\033[39m' % linux_running
        else:
            if linux_running == linux_installed:
                linux_running = '\033[33m%s\033[39m' % linux_running
            else:
                linux_running = '\033[31m%s\033[39m' % linux_running
        kernel_release = linux_running + kernel_release
    uname_ = '%s %s %s'
    uname_ %= (nodename, kernel_release, operating_system)
    return uname_


net_time = time.monotonic()
net_last = {}
def network():
    global net_time, net_last
    net_now = time.monotonic()
    net_tdiff, net_time = net_now - net_time, net_now
    net_ = Network('lo').devices
    def colourise(value):
        colour = '39'
        if value > 40:     colour = '32'
        if value > 8000:   colour = '33'
        if value > 60000:  colour = '31'
        return '\033[%sm%3.0f\033[0m' % (colour, value)
    def kbps(device, direction):
        direction += '_bytes'
        value = net_[device][direction]
        if device in net_last:
            value -= net_last[device][direction]
        else:
            value = 0
        value /= 128 * net_tdiff
        return colourise(value)
    def KBps(device, direction):
        direction += '_bytes'
        value = net_[device][direction]
        if device in net_last:
            value -= net_last[device][direction]
        else:
            value = 0
        value /= 1024 * net_tdiff
        return value
    net = [(dev, kbps(dev, 'rx'), KBps(dev, 'rx'), kbps(dev, 'tx'), KBps(dev, 'tx')) for dev in net_]
    net = ['%s: %skbps(%.0fKB/s)↓ %skbps(%.0fKB/s)↑' % x for x in net]
    net = '%s' % ' '.join(net)
    net_last = net_
    return net


last_cpu_idle, last_cpu_total = 0, 0
last_cpus_idle, last_cpus_total = [], []
def cpu():
    global last_cpus_idle, last_cpus_total, last_cpu_idle, last_cpu_total
    cpu_ = CPU()
    now_cpu_idle, now_cpus_idle = cpu_.cpu[CPU.idle], [cpu[CPU.idle] for cpu in cpu_.cpus]
    now_cpu_total, now_cpus_total = sum(cpu_.cpu), [sum(cpu) for cpu in cpu_.cpus]
    def cpu_usage(now_idle, now_total, last_idle, last_total):
        total = now_total - last_total
        idle = now_idle - last_idle
        return None if total == 0 else (total - idle) * 100 / total
    def colourise(value):
        if value is None:
            return '--%'
        colour = '39'
        if value >= 5:   colour = '32'
        if value >= 50:  colour = '33'
        if value >= 90:  colour = '31'
        return '\033[%sm%2.0f\033[0m%%' % (colour, value)
    if len(now_cpus_idle) > len(last_cpus_idle):
        last_cpus_idle += now_cpus_idle[len(last_cpus_idle):]
        last_cpus_total += now_cpus_total[len(last_cpus_total):]
    cpus = zip(now_cpus_idle, now_cpus_total, last_cpus_idle, last_cpus_total)
    cpus = ' '.join([colourise(cpu_usage(*c)) for c in cpus])
    cpu = colourise(cpu_usage(now_cpu_idle, now_cpu_total, last_cpu_idle, last_cpu_total))
    cpu = 'Cpu: %s : %s' % (cpus, cpu)
    last_cpus_idle, last_cpus_total = now_cpus_idle, now_cpus_total
    last_cpu_idle, last_cpu_total = now_cpu_idle, now_cpu_total
    return cpu


weather_last = '?'
weather_semaphore = threading.Semaphore()
def weather_update_():
    global weather_last
    if weather_semaphore.acquire(blocking = False):
        try:
            weather_ = Weather('ESSA').temp
            colour = '34'
            if weather_ < -10:  colour = '39;44'
            if weather_ >= 18:  colour = '39'
            if weather_ >= 25:  colour = '33'
            if weather_ >= 30:  colour = '31'
            weather_ = '\033[%sm%.0f\033[0m°C' % (colour, weather_)
            weather_last = weather_
        except:
            if not weather_last.endswith('?'):
                weather_last += '?'
        weather_semaphore.release()
weather_update = Sometimes(lambda : async(weather_update_), 20 * 60 * 2)
def weather():
    rc = weather_last
    weather_update()
    return rc


chase_ = Chase()
chase_update = Sometimes(lambda : async(chase_.update), 2 * 60 * 60 * 2)
def chase():
    status = chase_.status
    status = '39' if status is None else ('32' if status else '31')
    chase_update()
    return '\033[%smChase\033[0m' % status


solar_ = os.environ['HOME'] + '/.xpybar.sun'
def sun():
    try:
        return 'Sun: %s' % Solar(solar_).output
    except:
        return '¿Cannot get solar information?'


functions = [ Sometimes(lambda : clock_.read(), 1 * 2),
              lambda : time.time() % 1,
              Sometimes(users, 1 * 2),
              weather,
              chase,
              Sometimes(sun, 1 * 2),
              cpu,
              memory,
              network,
              Sometimes(uname, 30 * 60 * 2),
            ]

pattern = [ '%s │ %.2f │ %s │ %s │ %s │ %s }{ %s │ %s │ %s │ %s'
          ]


start_ = start
def start():
    start_()
    async(lambda : clock_.continuous_sync(lambda : bar.invalidate()))

HEIGHT = len(pattern) * 12
pattern = '\n'.join([p.replace('}{', '\0') for p in pattern])
semaphore = threading.Semaphore()

def redraw():
    if semaphore.acquire(blocking = False):
        values = pattern % tuple([f() for f in functions])
        #print(values.replace('\0', ' ' * 8))
        bar.partial_clear(0, bar.width, 10, 0, 2, values)
        bar.draw_coloured_splitted_text(0, bar.width, 10, 0, 2, values)
        semaphore.release()
        return True
    return False