#!/usr/bin/python2
# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2015 Lenovo
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import optparse
import os
import subprocess
import sys
path = os.path.dirname(os.path.realpath(__file__))
path = os.path.realpath(os.path.join(path, '..', 'lib', 'python'))
if path.startswith('/opt'):
    sys.path.append(path)
import confluent.client as client
import confluent.sortutil as sortutil
import confluent.logreader as logreader
import time
import socket
import re

confettypath = os.path.join(os.path.dirname(sys.argv[0]), 'confetty')
argparser = optparse.OptionParser(
    usage="Usage: %prog [options] node",
    epilog="Command sequences are available while connected to a console, hit "
           "ctrl-'e', then release ctrl, then 'c', then '?' for a full list. "
           "For example, ctrl-'e', then 'c', then '.' will exit the current "
           "console")
argparser.add_option('-t', '--tile', action='store_true', default=False,
                     help='Tile console windows in the terminal')
argparser.add_option('-l', '--log', action='store_true', default=False,
                     help='Enter log replay mode instead of showing a live console')
argparser.add_option('-w','--windowed', action='store_true', default=False,
                     help='Open terminal windows for each node.  The '
                          'environment variable NODECONSOLE_WINDOWED_COMMAND '
                          'should be set, which should be a text string corresponding '
                          'to a command that can be used to open a windowed console,'
                          ' omitting the "nodeconsole <noderange>" part of the '
                          'command, for example, to open a set of consoles for a '
                          'range of nodes in separate xterm windows, set '
                          'NODECONSOLE_WINDOWED_COMMAND to "xterm -e".  To open a '
                          'set of consoles for a range of nodes in separate '
                          'GNOME Terminal windows with a size of 100 columns and '
                          '31 rows, set NODECONSOLE_WINDOWED_COMMAND '
                          'to "gnome-terminal --geometry 100x31 --" or in a WSL '
                          'environment, to open a set of consoles for a range of '
                          'nodes in separate Windows Terminal windows, with the '
                          'title set for each node, set NODECONSOLE_WINDOWED_COMMAND'
                          ' to "wt.exe wsl.exe -d AlmaLinux-8 '
                          '--shell-type login".  If the NODECONSOLE_WINDOWED_COMMAND '
                          'environment variable isn\'t set, xterm will be used by'
                          'default.')

(options, args) = argparser.parse_args()

pass_through_args = []
if len(args) > 1:
   pass_through_args = args[1:]
   args = args[:1]

if len(args) != 1:
    argparser.print_help()
    sys.exit(1)
if options.log:
    logname = args[0]
    if not os.path.exists(logname) and logname[0] != '/':
        logname = os.path.join('/var/log/confluent/consoles', logname)
    if not os.path.exists(logname):
        sys.stderr.write('Unable to locate {0} on local system\n'.format(logname))
        sys.exit(1)
    logreader.replay_to_console(logname)
    sys.exit(0)


def handle_geometry(envlist, sizegeometry, side_pad=0, top_pad=0, first=False):    
    if '-geometry' in envlist:
        g_index = envlist.index('-geometry')
    elif '-g' in envlist:
        g_index = envlist.index('-g')
    else:
        g_index = 0
    if g_index:   
        if first:
             envlist[g_index+1] = '{0}+{1}+{2}'.format(envlist[g_index+1],side_pad, top_pad)
        else:
            envlist[g_index+1] = '{0}+{1}+{2}'.format(sizegeometry,side_pad, top_pad)
    else:
        envlist.insert(1, '-geometry')
        envlist.insert(2, '{0}+{1}+{2}'.format(sizegeometry,side_pad, top_pad))
        g_index = 1
    return envlist     

#added functionality for wcons
if options.windowed:
    result=subprocess.Popen(['xwininfo', '-root'], stdout=subprocess.PIPE)
    rootinfo=result.communicate()[0]
    result.wait()
    for line in rootinfo.decode('utf-8').split('\n'):
        if 'Width' in line:
            screenwidth = int(line.split(':')[1])
        if 'Height' in line:
            screenheight = int(line.split(':')[1])

    envstring=os.environ.get('NODECONSOLE_WINDOWED_COMMAND')
    if not envstring:
        sizegeometry='100x31'
        corrected_x, corrected_y = (13,84)
        envlist = handle_geometry(['xterm'] + pass_through_args + ['-e'],sizegeometry, first=True)
        #envlist=['xterm', '-bg', 'black', '-fg', 'white', '-geometry', '{sizegeometry}+0+0'.format(sizegeometry=sizegeometry), '-e']
    else:
        envlist=os.environ.get('NODECONSOLE_WINDOWED_COMMAND').split(' ')
        if envlist[0] == 'xterm':
            if '-geometry' in envlist:
                g_index = envlist.index('-geometry')
            elif '-g' in envlist:
                g_index = envlist.index('-g')
            else:
                g_index = 0
            if g_index:    
                envlist[g_index+1] = envlist[g_index+1] + '+0+0'

            else:
                envlist.insert(1, '-geometry')
                envlist.insert(2, '100x31+0+0')
                g_index = 1
            
    nodes = []
    sess = client.Command()
    for res in sess.read('/noderange/{0}/nodes/'.format(args[0])):
        node = res.get('item', {}).get('href', '/').replace('/', '')
        if not node:
            sys.stderr.write(res.get('error', repr(res)) + '\n')
            sys.exit(1)
        nodes.append(node)

    if options.tile and not envlist[0] == 'xterm':
        sys.stderr.write('[ERROR] UNSUPPORTED OPTIONS. \nWindowed and tiled consoles are only supported when using xterm \n')
        sys.exit(1)
    firstnode=nodes[0]
    nodes.pop(0)
    with open(os.devnull, 'wb') as devnull:
        xopen=subprocess.Popen(envlist + [confettypath, '-c', '/tmp/controlpath-{0}'.format(firstnode), '-m', '5', 'start', '/nodes/{0}/console/session'.format(firstnode) ] , stdin=devnull)
        time.sleep(2)
        s=socket.socket(socket.AF_UNIX)
        winid=''
        try:
            s.connect('/tmp/controlpath-{firstnode}'.format(firstnode=firstnode))
            s.recv(64)
            s.send(b'GETWINID')
            winid=s.recv(64).decode('utf-8')

        except:
            time.sleep(2)
            # try to get id of first panel/xterm window using name
            win=subprocess.Popen(['xwininfo', '-tree', '-root'], stdout=subprocess.PIPE)
            wintr=win.communicate()[0]
            for line in wintr.decode('utf-8').split('\n'):
                if 'console: {firstnode}'.format(firstnode=firstnode) in line or 'confetty' in line:
                    win_obj = [ele for ele in line.split(' ') if ele.strip()]
                    winid = win_obj[0]
    if winid:
        firstnode_window=subprocess.Popen(['xwininfo', '-id', '{winid}'.format(winid=winid)], stdout=subprocess.PIPE)
        xinfo=firstnode_window.communicate()[0]
        xinfl = xinfo.decode('utf-8').split('\n')
        for line in xinfl:
            if 'Absolute upper-left X:' in line:
                side_pad = int(line.split(':')[1])
            elif 'Absolute upper-left Y:' in line:
                top_pad = int(line.split(':')[1])

            elif 'Width:' in line:
                window_width = int(line.split(':')[1])
            elif 'Height' in line:
                window_height = int(line.split(':')[1])
            elif '-geometry' in line:
                l = re.split(' |x|\+', line)
                l_nosp = [ele for ele in l if ele.strip()]
                wmxo = int(l_nosp[1])
                wmyo = int(l_nosp[2])
                sizegeometry = str(wmxo) + 'x' + str(wmyo)
            else:
                pass

        window_width += side_pad*2
        window_height += side_pad+top_pad
        screenwidth -= wmxo
        screenheight -= wmyo
        currx = window_width
        curry = 0
        maxcol = int(screenwidth/window_width)

    for node in sortutil.natural_sort(nodes):
        if options.tile and envlist[0] == 'xterm':
            corrected_x = currx
            corrected_y = curry
            xgeometry = '{0}+{1}+{2}'.format(sizegeometry, corrected_x, corrected_y)
            currx += window_width
            if currx >= screenwidth:
                currx=0
                curry += window_height
                if curry > screenheight:
                    curry =top_pad
            if not envstring:        
                envlist= handle_geometry(envlist, sizegeometry, corrected_x, corrected_y)
            else:
                if g_index:    
                    envlist[g_index+1] = xgeometry
        elif envlist[0] == 'xterm':
            envlist=handle_geometry(envlist, sizegeometry, side_pad, top_pad)
            side_pad+=(side_pad+1)
            top_pad+=(top_pad+30)
        else:
            pass 
        with open(os.devnull, 'wb') as devnull:
            xopen=subprocess.Popen(envlist + [confettypath, '-m', '5', 'start', '/nodes/{0}/console/session'.format(node)] , stdin=devnull)
    sys.exit(0)
#end of wcons
if options.tile:
    null = open('/dev/null', 'w')
    nodes = []
    sess = client.Command()
    for res in sess.read('/noderange/{0}/nodes/'.format(args[0])):
        node = res.get('item', {}).get('href', '/').replace('/', '')
        if not node:
            sys.stderr.write(res.get('error', repr(res)) + '\n')
            sys.exit(1)
        nodes.append(node)
    initial = True
    pane = 0
    sessname = 'nodeconsole_{0}'.format(os.getpid())
    for node in sortutil.natural_sort(nodes):
        panename = '{0}:{1}'.format(sessname, pane)
        if initial:
            initial = False
            subprocess.call(
                ['tmux', 'new-session', '-d', '-s',
                 sessname, '-x', '800', '-y',
                 '800', '{0} -m 5 start /nodes/{1}/console/session'.format(
                    confettypath, node)])
        else:
            subprocess.call(['tmux', 'select-pane', '-t', sessname])
            subprocess.call(['tmux', 'set-option', '-t', panename, 'pane-border-status', 'top'], stderr=null)
            subprocess.call(
                    ['tmux', 'split', '-h', '-t', sessname,
                 '{0} -m 5 start /nodes/{1}/console/session'.format(
                     confettypath, node)])
            subprocess.call(['tmux', 'select-layout', '-t', sessname, 'tiled'], stdout=null)
            pane += 1
    subprocess.call(['tmux', 'select-pane', '-t', sessname])
    subprocess.call(['tmux', 'set-option', '-t', panename, 'pane-border-status', 'top'], stderr=null)
    os.execlp('tmux', 'tmux', 'attach', '-t', sessname)
else:
    os.execl(confettypath, confettypath, 'start',
             '/nodes/{0}/console/session'.format(args[0]))