# -*- encoding: utf-8 -*-
# Software Management Providers
#
# Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""Python Provider for LMI_YumPackage

Instruments the CIM class LMI_YumPackage

"""

import itertools
import datetime
#import yum
import pywbem
from pywbem.cim_provider2 import CIMProvider2
from util.common import *

pkg2model = YumPackage.pkg2model_wrapper('root/cimv2', "LMI_YumPackage")

class LMI_YumPackage(CIMProvider2):
    """Instrument the CIM class LMI_YumPackage 

    RPM package installed on particular computer system with YUM (The
    Yellowdog Updated, Modified) package manager.
    
    """

    def __init__ (self, env):
        logger = env.get_logger()
        logger.log_debug('Initializing provider %s from %s' \
                % (self.__class__.__name__, __file__))

    def get_instance(self, env, model):
        """Return an instance.

        Keyword arguments:
        env -- Provider Environment (pycimmb.ProviderEnvironment)
        model -- A template of the pywbem.CIMInstance to be returned.  The 
            key properties are set on this instance to correspond to the 
            instanceName that was requested.  The properties of the model
            are already filtered according to the PropertyList from the 
            request.  Only properties present in the model need to be
            given values.  If you prefer, you can set all of the 
            values, and the instance will be filtered for you. 

        Possible Errors:
        CIM_ERR_ACCESS_DENIED
        CIM_ERR_INVALID_PARAMETER (including missing, duplicate, unrecognized 
            or otherwise incorrect parameters)
        CIM_ERR_NOT_FOUND (the CIM Class does exist, but the requested CIM 
            Instance does not exist in the specified namespace)
        CIM_ERR_FAILED (some other unspecified error occurred)

        """
        
        logger = env.get_logger()
        logger.log_debug('Entering %s.get_instance()' \
                % self.__class__.__name__)

        with YumDB.getInstance(env):
            pkg = object_path2pkg(env, model.path, 'all')
            return pkg2model(pkg, env, keys_only=False, model=model)

    def enum_instances(self, env, model, keys_only):
        """Enumerate instances.

        The WBEM operations EnumerateInstances and EnumerateInstanceNames
        are both mapped to this method. 
        This method is a python generator

        Keyword arguments:
        env -- Provider Environment (pycimmb.ProviderEnvironment)
        model -- A template of the pywbem.CIMInstances to be generated.  
            The properties of the model are already filtered according to 
            the PropertyList from the request.  Only properties present in 
            the model need to be given values.  If you prefer, you can 
            always set all of the values, and the instance will be filtered 
            for you. 
        keys_only -- A boolean.  True if only the key properties should be
            set on the generated instances.

        Possible Errors:
        CIM_ERR_FAILED (some other unspecified error occurred)

        """

        logger = env.get_logger()
        logger.log_debug('Entering %s.enum_instances()' \
                % self.__class__.__name__)
                
        # Prime model.path with knowledge of the keys, so key values on
        # the CIMInstanceName (model.path) will automatically be set when
        # we set property values on the model. 
        model.path.update({'TargetOperatingSystem': None, 'Version': None,
            'SoftwareElementState': None, 'Name': None,
            'SoftwareElementID': None})
        
        with YumDB.getInstance(env) as yb:
            # get all packages
            pl = yb.doPackageLists('all', showdups=True)
            pl = itertools.chain(pl.installed, pl.available)
            # NOTE: available ∩ installed = ∅
            for pkg in sorted(pl, key=lambda a:a.evra):
                yield pkg2model(pkg, env, keys_only, model)

    def set_instance(self, env, instance, modify_existing):
        """Return a newly created or modified instance.

        Keyword arguments:
        env -- Provider Environment (pycimmb.ProviderEnvironment)
        instance -- The new pywbem.CIMInstance.  If modifying an existing 
            instance, the properties on this instance have been filtered by 
            the PropertyList from the request.
        modify_existing -- True if ModifyInstance, False if CreateInstance

        Return the new instance.  The keys must be set on the new instance. 

        Possible Errors:
        CIM_ERR_ACCESS_DENIED
        CIM_ERR_NOT_SUPPORTED
        CIM_ERR_INVALID_PARAMETER (including missing, duplicate, unrecognized 
            or otherwise incorrect parameters)
        CIM_ERR_ALREADY_EXISTS (the CIM Instance already exists -- only 
            valid if modify_existing is False, indicating that the operation
            was CreateInstance)
        CIM_ERR_NOT_FOUND (the CIM Instance does not exist -- only valid 
            if modify_existing is True, indicating that the operation
            was ModifyInstance)
        CIM_ERR_FAILED (some other unspecified error occurred)

        """

        logger = env.get_logger()
        logger.log_debug('Entering %s.set_instance()' \
                % self.__class__.__name__)
        # TODO create or modify the instance
        raise pywbem.CIMError(pywbem.CIM_ERR_NOT_SUPPORTED) # Remove to implement
        return instance

    def delete_instance(self, env, instance_name):
        """Delete an instance.

        Keyword arguments:
        env -- Provider Environment (pycimmb.ProviderEnvironment)
        instance_name -- A pywbem.CIMInstanceName specifying the instance 
            to delete.

        Possible Errors:
        CIM_ERR_ACCESS_DENIED
        CIM_ERR_NOT_SUPPORTED
        CIM_ERR_INVALID_NAMESPACE
        CIM_ERR_INVALID_PARAMETER (including missing, duplicate, unrecognized 
            or otherwise incorrect parameters)
        CIM_ERR_INVALID_CLASS (the CIM Class does not exist in the specified 
            namespace)
        CIM_ERR_NOT_FOUND (the CIM Class does exist, but the requested CIM 
            Instance does not exist in the specified namespace)
        CIM_ERR_FAILED (some other unspecified error occurred)

        """ 

        logger = env.get_logger()
        logger.log_debug('Entering %s.delete_instance()' \
                % self.__class__.__name__)

        # TODO delete the resource
        # Remove to implement
        raise pywbem.CIMError(pywbem.CIM_ERR_NOT_SUPPORTED)

    def cim_method_install(self, env, object_name):
        """Implements LMI_YumPackage.Install()

        Will install available package.
        
        Keyword arguments:
        env -- Provider Environment (pycimmb.ProviderEnvironment)
        object_name -- A pywbem.CIMInstanceName or pywbem.CIMCLassName 
            specifying the object on which the method Update() 
            should be invoked.

        Returns a two-tuple containing the return value (type pywbem.Uint32 self.Values.Install)
        and a list of CIMParameter objects representing the output parameters

        Output parameters:
        Installed -- (type REF (pywbem.CIMInstanceName(
                classname='LMI_YumInstalledPackage', ...)) 
            The reference to newly installed package, if installation was
            successful. Null otherwise.

        Possible Errors:
        CIM_ERR_ACCESS_DENIED
        CIM_ERR_INVALID_PARAMETER (including missing, duplicate, 
            unrecognized or otherwise incorrect parameters)
        CIM_ERR_NOT_FOUND (the target CIM Class or instance does not 
            exist in the specified namespace)
        CIM_ERR_METHOD_NOT_AVAILABLE (the CIM Server is unable to honor 
            the invocation request)
        CIM_ERR_FAILED (some other unspecified error occurred)

        """
        logger = env.get_logger()
        logger.log_debug('Entering %s.cim_method_install()' \
                % self.__class__.__name__)

        # parse and check arguments
        match_props = {}      # args for match_pkg
        if object_name['SoftwareElementID']:
            m = re_nevra.match(object_name['SoftwareElementID'])
            if not m:
                raise pywbem.CIMError(pywbem.CIM_ERR_INVALID_PARAMETER,
                        "SoftwareElementID could not be parsed.")
            match_props['nevra'] = object_name['SoftwareElementID']
            match_props['name'] = m.group('name')
        else:
            for matchattr, instattr in (
                    ('name', 'name'), ('epoch', 'epoch'), ('version', 'ver'),
                    ('release', 'rel'), ('arch', 'arch')):
                if object_name.get(matchattr, None):
                    match_props[matchattr] = object_name[matchattr]

        if not match_props:
            raise pywbem.CIMError(pywbem.CIM_ERR_FAILED,
                    "Too few key values given (give at least a Name).")
        if not 'name' in match_props and not 'nevra' in match_props:
            raise pywbem.CIMError(pywbem.CIM_ERR_FAILED,
                    "Missing either Name or SoftwareElementID property.")

        with YumDB.getInstance(env) as yb:
            # get available packages
            pl = yb.doPackageLists('all', showdups=True)
            exact,_,_ = yum.packages.parsePackages(
                    itertools.chain(pl.available, pl.installed),
                    [match_props['name']])
            exact = yum.misc.unique(exact)
            exact_orig = exact
            exact = sorted( [ p for p in exact if match_pkg(p, **match_props) ]
                          , key=lambda a: a.evra)
            if len(exact) == 0:
                logger.log_error('could not find any package for query: {}'
                        ' in list: {}'
                    .format(match_props, [p.nevra for p in exact_orig]))
                raise pywbem.CIMError(pywbem.CIM_ERR_NOT_FOUND,
                    "No matching package found.")
            out_params = [ pywbem.CIMParameter('Installed', type='reference') ]
            for pkg in exact: # check, whether package is already installed
                if yb.rpmdb.installed(po=pkg):
                    out_params[0].value = pkg2model(pkg, env, True)
                    return (self.Values.Install.Already_installed, out_params)
            if len(exact) > 1: # should not happen
                logger.log_info('found multiple matching packages'
                        ' for query: {}'.format(match_props))
                pkg = exact[-1] # select highest version
            else:
                logger.log_debug('exact match found for query: {}'
                    .format(match_props))
                pkg = exact[0]

            logger.log_info('installing package {}'.format(pkg.nevra))
            # install
            yb.install(pkg)
            yb.buildTransaction()
            yb.processTransaction()
            logger.log_info('package installed'.format(pkg.nevra))

            # return object_name
            out_params[0].value = pkg2model(pkg, env, True, object_name)
            return (self.Values.Install.Successful_installation, out_params)

    class Values(object):
        class DetailedStatus(object):
            Not_Available = pywbem.Uint16(0)
            No_Additional_Information = pywbem.Uint16(1)
            Stressed = pywbem.Uint16(2)
            Predictive_Failure = pywbem.Uint16(3)
            Non_Recoverable_Error = pywbem.Uint16(4)
            Supporting_Entity_in_Error = pywbem.Uint16(5)
            # DMTF_Reserved = ..
            # Vendor_Reserved = 0x8000..

        class Status(object):
            OK = 'OK'
            Error = 'Error'
            Degraded = 'Degraded'
            Unknown = 'Unknown'
            Pred_Fail = 'Pred Fail'
            Starting = 'Starting'
            Stopping = 'Stopping'
            Service = 'Service'
            Stressed = 'Stressed'
            NonRecover = 'NonRecover'
            No_Contact = 'No Contact'
            Lost_Comm = 'Lost Comm'
            Stopped = 'Stopped'

        class HealthState(object):
            Unknown = pywbem.Uint16(0)
            OK = pywbem.Uint16(5)
            Degraded_Warning = pywbem.Uint16(10)
            Minor_failure = pywbem.Uint16(15)
            Major_failure = pywbem.Uint16(20)
            Critical_failure = pywbem.Uint16(25)
            Non_recoverable_error = pywbem.Uint16(30)
            # DMTF_Reserved = ..
            # Vendor_Specific = 32768..65535

        class TargetOperatingSystem(object):
            Unknown = pywbem.Uint16(0)
            Other = pywbem.Uint16(1)
            MACOS = pywbem.Uint16(2)
            ATTUNIX = pywbem.Uint16(3)
            DGUX = pywbem.Uint16(4)
            DECNT = pywbem.Uint16(5)
            Tru64_UNIX = pywbem.Uint16(6)
            OpenVMS = pywbem.Uint16(7)
            HPUX = pywbem.Uint16(8)
            AIX = pywbem.Uint16(9)
            MVS = pywbem.Uint16(10)
            OS400 = pywbem.Uint16(11)
            OS_2 = pywbem.Uint16(12)
            JavaVM = pywbem.Uint16(13)
            MSDOS = pywbem.Uint16(14)
            WIN3x = pywbem.Uint16(15)
            WIN95 = pywbem.Uint16(16)
            WIN98 = pywbem.Uint16(17)
            WINNT = pywbem.Uint16(18)
            WINCE = pywbem.Uint16(19)
            NCR3000 = pywbem.Uint16(20)
            NetWare = pywbem.Uint16(21)
            OSF = pywbem.Uint16(22)
            DC_OS = pywbem.Uint16(23)
            Reliant_UNIX = pywbem.Uint16(24)
            SCO_UnixWare = pywbem.Uint16(25)
            SCO_OpenServer = pywbem.Uint16(26)
            Sequent = pywbem.Uint16(27)
            IRIX = pywbem.Uint16(28)
            Solaris = pywbem.Uint16(29)
            SunOS = pywbem.Uint16(30)
            U6000 = pywbem.Uint16(31)
            ASERIES = pywbem.Uint16(32)
            HP_NonStop_OS = pywbem.Uint16(33)
            HP_NonStop_OSS = pywbem.Uint16(34)
            BS2000 = pywbem.Uint16(35)
            LINUX = pywbem.Uint16(36)
            Lynx = pywbem.Uint16(37)
            XENIX = pywbem.Uint16(38)
            VM = pywbem.Uint16(39)
            Interactive_UNIX = pywbem.Uint16(40)
            BSDUNIX = pywbem.Uint16(41)
            FreeBSD = pywbem.Uint16(42)
            NetBSD = pywbem.Uint16(43)
            GNU_Hurd = pywbem.Uint16(44)
            OS9 = pywbem.Uint16(45)
            MACH_Kernel = pywbem.Uint16(46)
            Inferno = pywbem.Uint16(47)
            QNX = pywbem.Uint16(48)
            EPOC = pywbem.Uint16(49)
            IxWorks = pywbem.Uint16(50)
            VxWorks = pywbem.Uint16(51)
            MiNT = pywbem.Uint16(52)
            BeOS = pywbem.Uint16(53)
            HP_MPE = pywbem.Uint16(54)
            NextStep = pywbem.Uint16(55)
            PalmPilot = pywbem.Uint16(56)
            Rhapsody = pywbem.Uint16(57)
            Windows_2000 = pywbem.Uint16(58)
            Dedicated = pywbem.Uint16(59)
            OS_390 = pywbem.Uint16(60)
            VSE = pywbem.Uint16(61)
            TPF = pywbem.Uint16(62)
            Windows__R__Me = pywbem.Uint16(63)
            Caldera_Open_UNIX = pywbem.Uint16(64)
            OpenBSD = pywbem.Uint16(65)
            Not_Applicable = pywbem.Uint16(66)
            Windows_XP = pywbem.Uint16(67)
            z_OS = pywbem.Uint16(68)
            Microsoft_Windows_Server_2003 = pywbem.Uint16(69)
            Microsoft_Windows_Server_2003_64_Bit = pywbem.Uint16(70)
            Windows_XP_64_Bit = pywbem.Uint16(71)
            Windows_XP_Embedded = pywbem.Uint16(72)
            Windows_Vista = pywbem.Uint16(73)
            Windows_Vista_64_Bit = pywbem.Uint16(74)
            Windows_Embedded_for_Point_of_Service = pywbem.Uint16(75)
            Microsoft_Windows_Server_2008 = pywbem.Uint16(76)
            Microsoft_Windows_Server_2008_64_Bit = pywbem.Uint16(77)
            FreeBSD_64_Bit = pywbem.Uint16(78)
            RedHat_Enterprise_Linux = pywbem.Uint16(79)
            RedHat_Enterprise_Linux_64_Bit = pywbem.Uint16(80)
            Solaris_64_Bit = pywbem.Uint16(81)
            SUSE = pywbem.Uint16(82)
            SUSE_64_Bit = pywbem.Uint16(83)
            SLES = pywbem.Uint16(84)
            SLES_64_Bit = pywbem.Uint16(85)
            Novell_OES = pywbem.Uint16(86)
            Novell_Linux_Desktop = pywbem.Uint16(87)
            Sun_Java_Desktop_System = pywbem.Uint16(88)
            Mandriva = pywbem.Uint16(89)
            Mandriva_64_Bit = pywbem.Uint16(90)
            TurboLinux = pywbem.Uint16(91)
            TurboLinux_64_Bit = pywbem.Uint16(92)
            Ubuntu = pywbem.Uint16(93)
            Ubuntu_64_Bit = pywbem.Uint16(94)
            Debian = pywbem.Uint16(95)
            Debian_64_Bit = pywbem.Uint16(96)
            Linux_2_4_x = pywbem.Uint16(97)
            Linux_2_4_x_64_Bit = pywbem.Uint16(98)
            Linux_2_6_x = pywbem.Uint16(99)
            Linux_2_6_x_64_Bit = pywbem.Uint16(100)
            Linux_64_Bit = pywbem.Uint16(101)
            Other_64_Bit = pywbem.Uint16(102)
            Microsoft_Windows_Server_2008_R2 = pywbem.Uint16(103)
            VMware_ESXi = pywbem.Uint16(104)
            Microsoft_Windows_7 = pywbem.Uint16(105)
            CentOS_32_bit = pywbem.Uint16(106)
            CentOS_64_bit = pywbem.Uint16(107)
            Oracle_Enterprise_Linux_32_bit = pywbem.Uint16(108)
            Oracle_Enterprise_Linux_64_bit = pywbem.Uint16(109)
            eComStation_32_bitx = pywbem.Uint16(110)

        class CommunicationStatus(object):
            Unknown = pywbem.Uint16(0)
            Not_Available = pywbem.Uint16(1)
            Communication_OK = pywbem.Uint16(2)
            Lost_Communication = pywbem.Uint16(3)
            No_Contact = pywbem.Uint16(4)
            # DMTF_Reserved = ..
            # Vendor_Reserved = 0x8000..

        class OperationalStatus(object):
            Unknown = pywbem.Uint16(0)
            Other = pywbem.Uint16(1)
            OK = pywbem.Uint16(2)
            Degraded = pywbem.Uint16(3)
            Stressed = pywbem.Uint16(4)
            Predictive_Failure = pywbem.Uint16(5)
            Error = pywbem.Uint16(6)
            Non_Recoverable_Error = pywbem.Uint16(7)
            Starting = pywbem.Uint16(8)
            Stopping = pywbem.Uint16(9)
            Stopped = pywbem.Uint16(10)
            In_Service = pywbem.Uint16(11)
            No_Contact = pywbem.Uint16(12)
            Lost_Communication = pywbem.Uint16(13)
            Aborted = pywbem.Uint16(14)
            Dormant = pywbem.Uint16(15)
            Supporting_Entity_in_Error = pywbem.Uint16(16)
            Completed = pywbem.Uint16(17)
            Power_Mode = pywbem.Uint16(18)
            Relocating = pywbem.Uint16(19)
            # DMTF_Reserved = ..
            # Vendor_Reserved = 0x8000..

        class OperatingStatus(object):
            Unknown = pywbem.Uint16(0)
            Not_Available = pywbem.Uint16(1)
            Servicing = pywbem.Uint16(2)
            Starting = pywbem.Uint16(3)
            Stopping = pywbem.Uint16(4)
            Stopped = pywbem.Uint16(5)
            Aborted = pywbem.Uint16(6)
            Dormant = pywbem.Uint16(7)
            Completed = pywbem.Uint16(8)
            Migrating = pywbem.Uint16(9)
            Emigrating = pywbem.Uint16(10)
            Immigrating = pywbem.Uint16(11)
            Snapshotting = pywbem.Uint16(12)
            Shutting_Down = pywbem.Uint16(13)
            In_Test = pywbem.Uint16(14)
            Transitioning = pywbem.Uint16(15)
            In_Service = pywbem.Uint16(16)
            # DMTF_Reserved = ..
            # Vendor_Reserved = 0x8000..

        class SoftwareElementState(object):
            Deployable = pywbem.Uint16(0)
            Installable = pywbem.Uint16(1)
            Executable = pywbem.Uint16(2)
            Running = pywbem.Uint16(3)

        class PrimaryStatus(object):
            Unknown = pywbem.Uint16(0)
            OK = pywbem.Uint16(1)
            Degraded = pywbem.Uint16(2)
            Error = pywbem.Uint16(3)
            # DMTF_Reserved = ..
            # Vendor_Reserved = 0x8000..

        class Install(object):
            Already_installed = pywbem.Uint32(0)
            Successful_installation = pywbem.Uint32(1)
            Failed = pywbem.Uint32(2)

## end of class LMI_YumPackage
    
## get_providers() for associating CIM Class Name to python provider class name
    
def get_providers(env): 
    lmi_yumpackage_prov = LMI_YumPackage(env)  
    return {'LMI_YumPackage': lmi_yumpackage_prov}