#!/usr/bin/python -t
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

import sys
import time
import exceptions

import yum
from cli import *
from yum import Errors
from yum import _
from yum import logginglevels
from optparse import OptionGroup

import yum.plugins as plugins
from urlgrabber.progress import format_number

def suppress_keyboard_interrupt_message():
    old_excepthook = sys.excepthook

    def new_hook(type, value, traceback):
        if type != exceptions.KeyboardInterrupt:
            old_excepthook(type, value, traceback)
        else:
            pass

    sys.excepthook = new_hook

def jiffies_to_seconds(jiffies):
    Hertz = 100 # FIXME: Hack, need to get this, AT_CLKTCK elf note *sigh*
    return int(jiffies) / Hertz

def seconds_to_ui_time(seconds):
    if seconds >= 60 * 60 * 24:
        return "%d day(s) %d:%02d:%02d" % (seconds / (60 * 60 * 24),
                                           (seconds / (60 * 60)) % 24,
                                           (seconds / 60) % 60,
                                           seconds % 60)
    if seconds >= 60 * 60:
        return "%d:%02d:%02d" % (seconds / (60 * 60), (seconds / 60) % 60,
                                 (seconds % 60))
    return "%02d:%02d" % ((seconds / 60), seconds % 60)

def get_process_info(pid):
    if not pid:
        return

    # Maybe true if /proc isn't mounted, or not Linux ... or something.
    if (not os.path.exists("/proc/%d/status" % pid) or
        not os.path.exists("/proc/stat") or
        not os.path.exists("/proc/%d/stat" % pid)):
        return

    ps = {}
    for line in open("/proc/%d/status" % pid):
        if line[-1] != '\n':
            continue
        data = line[:-1].split(':\t', 1)
        if len(data) < 2:
            continue
        if data[1].endswith(' kB'):
            data[1] = data[1][:-3]
        ps[data[0].strip().lower()] = data[1].strip()
    if 'vmrss' not in ps:
        return
    if 'vmsize' not in ps:
        return
    boot_time = None
    for line in open("/proc/stat"):
        if line.startswith("btime "):
            boot_time = int(line[len("btime "):-1])
            break
    if boot_time is None:
        return
    ps_stat = open("/proc/%d/stat" % pid).read().split()
    ps['utime'] = jiffies_to_seconds(ps_stat[13])
    ps['stime'] = jiffies_to_seconds(ps_stat[14])
    ps['cutime'] = jiffies_to_seconds(ps_stat[15])
    ps['cstime'] = jiffies_to_seconds(ps_stat[16])
    ps['start_time'] = boot_time + jiffies_to_seconds(ps_stat[21])
    ps['state'] = {'R' : _('Running'),
                   'S' : _('Sleeping'),
                   'D' : _('Uninterruptible'),
                   'Z' : _('Zombie'),
                   'T' : _('Traced/Stopped')
                   }.get(ps_stat[2], _('Unknown'))
                   
    return ps

def show_lock_owner(pid, logger):
    if not pid:
        return

    ps = get_process_info(pid)
    # This yumBackend isn't very friendly, so...
    if ps['name'] == 'yumBackend.py':
        nmsg = _("  The other application is: PackageKit")
    else:
        nmsg = _("  The other application is: %s") % ps['name']

    logger.critical("%s", nmsg)
    logger.critical(_("    Memory : %5s RSS (%5sB VSZ)") %
                    (format_number(int(ps['vmrss']) * 1024),
                     format_number(int(ps['vmsize']) * 1024)))
    
    ago = seconds_to_ui_time(int(time.time()) - ps['start_time'])
    logger.critical(_("    Started: %s - %s ago") %
                    (time.ctime(ps['start_time']), ago))
    logger.critical(_("    State  : %s, pid: %d") % (ps['state'], pid))

class YumUtilBase(YumBaseCli):
    def __init__(self,name,ver,usage):
        YumBaseCli.__init__(self)
        self._parser = YumOptionParser(base=self,utils=True,usage=usage)
        self._usage = usage
        self._utilName = name
        self._utilVer = ver
        self._option_group = OptionGroup(self._parser, "%s options" % self._utilName,"")
        self._parser.add_option_group(self._option_group)
        suppress_keyboard_interrupt_message()
        logger = logging.getLogger("yum.util")
        verbose_logger = logging.getLogger("yum.verbose.util")
        
        
    def getOptionParser(self):
        return self._parser        

    def getOptionGroup(self):
        """ Get an option group to add non inherited options"""
        return self._option_group    
    
    def waitForLock(self):
        lockerr = ""
        while True:
            try:
                self.doLock()
            except Errors.LockError, e:
                if "%s" %(e.msg,) != lockerr:
                    lockerr = "%s" %(e.msg,)
                    self.logger.critical(lockerr)
                self.logger.critical("Another app is currently holding the yum lock; waiting for it to exit...")  
                show_lock_owner(e.pid, self.logger)
                time.sleep(2)
            else:
                break
        
    def _printUtilVersion(self):
        print "%s - %s (yum - %s)" % (self._utilName,self._utilVer,yum.__version__)
        
    def doUtilConfigSetup(self,args = sys.argv[1:],pluginsTypes=(plugins.TYPE_CORE,)):
        # Parse only command line options that affect basic yum setup
        opts = self._parser.firstParse(args)
        # Just print out the version if that's what the user wanted
        if opts.version:
            self._printUtilVersion()
            sys.exit(0)
        # get the install root to use
        root = self._parser.getRoot(opts)
        if opts.quiet:
            opts.debuglevel = 0
        if opts.verbose:
            opts.debuglevel = opts.errorlevel = 6
        
        # Read up configuration options and initialise plugins
        try:
            pc = self.preconf
            pc.fn = opts.conffile
            pc.root = root
            pc.init_plugins = not opts.noplugins
            pc.plugin_types = pluginsTypes
            pc.optparser = self._parser
            pc.debuglevel = opts.debuglevel
            pc.errorlevel = opts.errorlevel
            if hasattr(opts, "disableplugins"):
                pc.disabled_plugins =self._parser._splitArg(opts.disableplugins)
            if hasattr(opts, "enableplugins"):
                pc.enabled_plugins = self._parser._splitArg(opts.enableplugins)
            self.conf

        except Errors.ConfigError, e:
            self.logger.critical(_('Config Error: %s'), e)
            sys.exit(1)
        except ValueError, e:
            self.logger.critical(_('Options Error: %s'), e)
            sys.exit(1)
        except plugins.PluginYumExit, e:
            self.logger.critical(_('PluginExit Error: %s'), e)
            sys.exit(1)
        except Errors.YumBaseError, e:
            self.logger.critical(_('Yum Error: %s'), e)
            sys.exit(1)
            
        # update usage in case plugins have added commands
        self._parser.set_usage(self._usage)
        
        # Now parse the command line for real and 
        # apply some of the options to self.conf
        (opts, self.cmds) = self._parser.setupYumConfig()
        if self.cmds:
            self.basecmd = self.cmds[0] # our base command
        else:
            self.basecmd = None
        self.extcmds = self.cmds[1:] # out extended arguments/commands

        return opts

    def doUtilYumSetup(self):
        """do a default setup for all the normal/necessary yum components,
           really just a shorthand for testing"""
        # FIXME - we need another way to do this, I think.
        try:
            self.waitForLock()
            self._getTs()
            self._getRpmDB()
            self._getRepos(doSetup = True)
            self._getSacks()
        except Errors.YumBaseError, msg:
            self.logger.critical(str(msg))
            sys.exit(1)
    
    def doUtilTransaction(self):
        def exUserCancel():
            self.logger.critical(_('\n\nExiting on user cancel'))
            if unlock(): return 200
            return 1

        def exIOError(e):
            if e.errno == 32:
                self.logger.critical(_('\n\nExiting on Broken Pipe'))
            else:
                self.logger.critical(_('\n\n%s') % str(e))
            if unlock(): return 200
            return 1

        def exPluginExit(e):
            '''Called when a plugin raises PluginYumExit.

            Log the plugin's exit message if one was supplied.
            ''' # ' xemacs hack
            exitmsg = str(e)
            if exitmsg:
                self.logger.warn('\n\n%s', exitmsg)
            if unlock(): return 200
            return 1

        def exFatal(e):
            self.logger.critical('\n\n%s', to_unicode(e.value))
            if unlock(): return 200
            return 1

        def unlock():
            try:
                self.closeRpmDB()
                self.doUnlock()
            except Errors.LockError, e:
                return 200
            return 0

        try:
            return_code = self.doTransaction()
        except plugins.PluginYumExit, e:
            return exPluginExit(e)
        except Errors.YumBaseError, e:
            return exFatal(e)
        except KeyboardInterrupt:
            return exUserCancel()
        except IOError, e:
            return exIOError(e)

        self.verbose_logger.log(logginglevels.INFO_2, _('Complete!'))
        if unlock(): return 200
        return return_code
        
def main():
    name = 'testutil'
    ver  = '0.1'
    usage = 'testutil [options] [args]'
    util = YumUtilBase(name,ver,usage)
    parser = util.getOptionParser() 
    parser.add_option("", "--myoption", dest="myoption",
                    action="store_true", default=False, 
                    help="This is an util option")
    util.logger.info("Setup Yum Config")
    opts = util.doUtilConfigSetup()
    util.logger.info("Setup Yum")
    util.doUtilYumSetup()
    print "Command line args: %s" % " ".join(util.cmds)
    print "Command line options :"
    print opts
    
    util.logger.info("%s Completed" % name)
if __name__ == '__main__':
    main()