"""
Copyright 2015 Open Networking Foundation (ONF)

Please refer questions to either the onos test mailing list at <onos-test@onosproject.org>,
the System Testing Plans and Results wiki page at <https://wiki.onosproject.org/x/voMg>,
or the System Testing Guide page at <https://wiki.onosproject.org/x/WYQg>

    TestON 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.

    TestON 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 TestON.  If not, see <http://www.gnu.org/licenses/>.
"""

# Testing network scalability, this test suite scales up a network topology
# using mininet and verifies ONOS stability

class SCPFscaleTopo:

    def __init__( self ):
        self.default = ''

    def CASE1( self, main ):
        import os
        import imp
        """
        - Construct tests variables
        - GIT ( optional )
            - Checkout ONOS master branch
            - Pull latest ONOS code
        - Building ONOS ( optional )
            - Install ONOS package
            - Build ONOS package
        """
        try:
            from tests.dependencies.ONOSSetup import ONOSSetup
            main.testSetUp = ONOSSetup()
        except ImportError:
            main.log.error( "ONOSSetup not found. exiting the test" )
            main.exit()
        main.testSetUp.envSetupDescription()
        stepResult = main.FALSE
        try:
            # The variable to decide if the data should be written into data base.
            # 1 means Yes and -1 means No.
            main.writeData = 1
            main.searchTerm = main.params[ 'SearchTerm' ]
            main.apps = main.params[ 'ENV' ][ 'cellApps' ]
            main.dependencyPath = main.testOnDirectory + \
                                  main.params[ 'DEPENDENCY' ][ 'path' ]
            main.tsharkResultPath = main.params[ 'TsharkPath' ]
            main.roleRequest = main.params[ 'SearchTerm' ]['roleRequest']
            main.multiovs = main.params[ 'DEPENDENCY' ][ 'multiovs' ]
            main.topoName = main.params[ 'TOPOLOGY' ][ 'topology' ]
            main.numCtrls = int( main.params[ 'CTRL' ][ 'numCtrls' ] )
            main.topoScale = ( main.params[ 'TOPOLOGY' ][ 'scale' ] ).split( "," )
            main.topoScaleSize = len( main.topoScale )
            wrapperFile1 = main.params[ 'DEPENDENCY' ][ 'wrapper1' ]
            wrapperFile2 = main.params[ 'DEPENDENCY' ][ 'wrapper2' ]
            wrapperFile3 = main.params[ 'DEPENDENCY' ][ 'wrapper3' ]
            main.topoCmpAttempts = int( main.params[ 'ATTEMPTS' ][ 'topoCmp' ] )
            main.pingallAttempts = int( main.params[ 'ATTEMPTS' ][ 'pingall' ] )
            main.startUpSleep = int( main.params[ 'SLEEP' ][ 'startup' ] )
            main.balanceSleep = int( main.params[ 'SLEEP' ][ 'balance' ] )
            main.nodeSleep = int( main.params[ 'SLEEP' ][ 'nodeSleep' ] )
            main.pingallSleep = int( main.params[ 'SLEEP' ][ 'pingall' ] )
            main.MNSleep = int( main.params[ 'SLEEP' ][ 'MNsleep' ] )
            main.pingTimeout = float( main.params[ 'TIMEOUT' ][ 'pingall' ] )
            main.hostDiscover = main.params[ 'TOPOLOGY' ][ 'host' ]
            main.hostDiscoverSleep = float( main.params['SLEEP']['host'] )
            if main.hostDiscover == 'True':
                main.hostDiscover = True
            else:
                main.hostDiscover = False
            main.homeDir = os.path.expanduser('~')
            main.hostsData = {}
            main.activeNodes = []


            stepResult = main.testSetUp.envSetup()
            main.allinfo = {} # The dictionary to record all the data from karaf.log

            for i in range( 2 ):
                main.allinfo[ i ]={}
                for w in range ( 3 ):
                    # Totaltime: the time from the new switchConnection to its end
                    # swConnection: the time from the first new switchConnection to the last new switchConnection
                    # lastSwToLastRr: the time from the last new switchConnection to the last role request
                    # lastRrToLastTopology: the time form the last role request to the last topology
                    # disconnectRate: the rate that shows how many switch disconnect after connection
                    main.allinfo[ i ][ 'info' + str( w ) ]= { 'totalTime': 0, 'swConnection': 0, 'lastSwToLastRr': 0, 'lastRrToLastTopology': 0, 'disconnectRate': 0 }

            main.dbFilePath = main.params[ 'DATABASE' ][ 'dbPath' ]
            main.log.info( "Create Database file " + main.dbFilePath )
            resultDB = open(main.dbFilePath, 'w+' )
            resultDB.close()

            main.scaleTopoFunction = imp.load_source( wrapperFile2,
                                                      main.dependencyPath +
                                                      wrapperFile2 +
                                                      ".py" )

            main.topo = imp.load_source( wrapperFile3,
                                         main.dependencyPath +
                                         wrapperFile3 +
                                         ".py" )

            main.ONOSbench.scp( main.Mininet1,
                                main.dependencyPath +
                                main.multiovs,
                                main.Mininet1.home,
                                direction="to" )
        except Exception as e:
            main.testSetUp.envSetupException( e )
        main.testSetUp.evnSetupConclusion( stepResult )
        main.commit = main.commit.split( " " )[ 1 ]

    def CASE2( self, main):
        """
        - Set up cell
            - Create cell file
            - Set cell file
            - Verify cell file
        - Kill ONOS process
        - Uninstall ONOS cluster
        - Verify ONOS start up
        - Install ONOS cluster
        - Connect to cli
        """
        import time
        try:
            from tests.dependencies.utils import Utils
        except ImportError:
            main.log.error( "Utils not found exiting the test" )
            main.exit()
        try:
            main.Utils
        except ( NameError, AttributeError ):
            main.Utils = Utils()
        main.Utils.mininetCleanup( main.Mininet1 )
        main.testSetUp.ONOSSetUp( main.Mininet1 )
        main.activeNodes = []
        for i in range( main.numCtrls ):
            main.activeNodes.append( i )

    def CASE10( self, main ):
        """
            Starting up torus topology
        """

        main.case( "Starting up Mininet and verifying topology" )
        main.caseExplanation = "Starting Mininet with a scalling topology and " +\
                "comparing topology elements between Mininet and ONOS"
        if main.topoScale:
            main.currScale = main.topoScale.pop(0)
        else: main.log.error( "topology scale is empty" )
        main.step( "Starting up TORUS %sx%s topology" % (main.currScale, main.currScale) )

        main.log.info( "Constructing Mininet command" )
        mnCmd = " mn --custom " + main.Mininet1.home + main.multiovs + \
                " --switch ovsm --topo " + main.topoName + "," + main.currScale + "," + main.currScale
        for i in range( main.numCtrls ):
                mnCmd += " --controller remote,ip=" + main.ONOSip[ i ]
        stepResult = main.Mininet1.startNet( mnCmd=mnCmd )
        utilities.assert_equals( expect=main.TRUE,
                                 actual=stepResult,
                                  onpass=main.topoName +
                                    " topology started successfully",
                                 onfail=main.topoName +
                                    " topology failed to start" )

        time.sleep( main.MNSleep )
        main.log.info( "Clean up Tshark" )
        with open(main.tsharkResultPath, "w" ) as tshark:
            tshark.write( "" )
        main.log.info( "Starting Tshark capture" )
        main.ONOSbench.tsharkGrep( main.roleRequest, main.tsharkResultPath, grepOptions='-E' )
        main.CLIs[ 0 ].activateApp( "org.onosproject.openflow" )
        time.sleep( main.MNSleep )
        main.log.info( "Stop Tshark" )
        main.ONOSbench.tsharkStop()
        main.log.info( "Get role request time" )
        with open( main.tsharkResultPath, "r" ) as resultFile:
            resultText = resultFile.readlines()
            resultFile.close()

    def CASE11( self, main ):
        """
            Compare topo, and sending Arping package
            if the topology is same, then Pass.
        """
        import json
        import time
        try:
            from tests.dependencies.topology import Topology
        except ImportError:
            main.log.error( "Topology not found exiting the test" )
            main.exit()
        try:
            main.topoRelated
        except ( NameError, AttributeError ):
            main.topoRelated = Topology()
        # First capture
        for i in range( 3 ):
            # Calculate total time
            main.allinfo[ 0 ][ 'info' + str( i )][ 'totalTime' ] = main.scaleTopoFunction.getInfoFromLog( main, main.searchTerm[ 'start' ], 'first', main.searchTerm[ 'end' ], 'last', index=i, funcMode='TD' )
            # Calculate switch connection time
            main.allinfo[ 0 ][ 'info' + str( i )][ 'swConnection' ] = main.scaleTopoFunction.getInfoFromLog( main, main.searchTerm[ 'start' ], 'first', main.searchTerm[ 'start' ], 'last', index=i, funcMode='TD' )
            # Calculate the time from last switch connection to the last role request
            main.allinfo[ 0 ][ 'info' + str( i )][ 'lastSwToLastRr' ] = main.scaleTopoFunction.compareTimeDiffWithRoleRequest( main, main.searchTerm[ 'start' ], 'last', index=i )
            # Calculate the time from the last role request to the last topology
            main.allinfo[ 0 ][ 'info' + str( i )][ 'lastRrToLastTopology' ] = main.scaleTopoFunction.compareTimeDiffWithRoleRequest( main, main.searchTerm[ 'end' ], 'last', index=i )
            # Calculate the disconnecti rate
            main.allinfo[ 0 ][ 'info' + str( i )][ 'disconnectRate' ] = main.scaleTopoFunction.getInfoFromLog( main, main.searchTerm[ 'Disconnect' ], 'num', main.searchTerm[ 'start' ], 'num', index=i, funcMode='DR' )
        main.log.debug( "The data is " + str( main.allinfo[ 0 ] ) )

        main.case( "Verifying topology: TORUS %sx%s" % ( main.currScale, main.currScale ) )
        main.caseExplanation = "Pinging all hosts and comparing topology " +\
                "elements between Mininet and ONOS"

        main.log.info( "Gathering topology information")
        time.sleep( main.MNSleep )
        stepResult = main.TRUE
        main.step( "Comparing MN topology to ONOS topology" )
        compareRetry = 0
        while compareRetry < 3:
            #While loop for retry
            devices = main.topoRelated.getAllDevices( main.numCtrls, False )
            ports = main.topoRelated.getAllPorts( main.numCtrls, False )
            links = main.topoRelated.getAllLinks( main.numCtrls, False)
            mnSwitches = main.Mininet1.getSwitches()
            mnLinks = main.Mininet1.getLinks(timeout=180)

            for controller in range(len(main.activeNodes)):
                # controllerStr = str( main.activeNodes[controller] + 1 )
                currentDevicesResult = main.topoRelated.compareDevicePort(
                                                            main.Mininet1, controller,
                                                            mnSwitches,
                                                            devices, ports )

                currentLinksResult = main.topoRelated.compareBase( links, controller,
                                                        main.Mininet1.compareLinks,
                                                        [ mnSwitches, mnLinks ] )

                stepResult = stepResult and currentDevicesResult and currentLinksResult
            if stepResult:
                break
            compareRetry += 1
        utilities.assert_equals(expect=main.TRUE,
                                actual=stepResult,
                                onpass=" Topology match Mininet",
                                onfail="ONOS Topology doesn't match Mininet")

        if stepResult:
            if main.hostDiscover:
                hostList = []
                for i in range( 1, int( main.currScale ) + 1 ):
                    for j in range( 1, int( main.currScale ) + 1) :
                        # Generate host list
                        hoststr = "h" + str(i) + "x" + str(j)
                        hostList.append(hoststr)
                for i in range( len(hostList) ):
                    totalHost = main.topo.sendArpPackage( main, hostList[i] )
                    time.sleep( main.hostDiscoverSleep )
                    if totalHost < 0:
                        # if totalHost less than 0 which means dependence function has exception.
                        main.log.info( "Error when discover host!" )
                        break
                if totalHost == int( main.currScale ) *  int( main.currScale ):
                    main.log.info( "Discovered all hosts" )
                    stepResult = stepResult and main.TRUE
                else:
                    main.log.warn( "Some hosts ware not discovered by ONOS... Topology doesn't match!" )
                    stepResult = main.FALSE
                utilities.assert_equals(expect=main.TRUE,
                                        actual=stepResult,
                                        onpass=" Topology match Mininet",
                                        onfail="ONOS Topology doesn't match Mininet")
            main.log.info( "Finished this iteration, continue to scale next topology." )
        else:
            main.log.info( "Clean up and exit TestON. Finished this test." )
            main.cleanup()
            main.exit()

    def CASE100( self, main ):
        '''
           Bring Down node 3
        '''

        main.case("Bring ONOS node 3 down: TORUS %sx%s" % (main.currScale, main.currScale))
        main.caseExplanation = "Balance masters to make sure " +\
                        "each controller has some devices and " +\
                        "stop ONOS node 3 service. "

        stepResult = main.FALSE
        main.step( "Bringing down node 3" )
        # Always bring down the third node
        main.deadNode = 2
        # Printing purposes
        node = main.deadNode + 1
        main.log.info( "Stopping node %s" % node )
        stepResult = main.ONOSbench.onosStop( main.ONOSip[ main.deadNode ] )
        main.log.info( "Removing dead node from list of active nodes" )
        main.activeNodes.pop( main.deadNode )

        utilities.assert_equals( expect=main.TRUE,
                                 actual=stepResult,
                                 onpass="Successfully bring down node 3",
                                 onfail="Failed to bring down node 3" )

    def CASE200( self, main ):
        '''
            Bring up onos node
        '''

        main.case("Bring ONOS node 3 up: TORUS %sx%s" % (main.currScale, main.currScale))
        main.caseExplanation = "Bring node 3 back up and balance the masters"

        node = main.deadNode + 1
        main.log.info( "Starting node %s" % node )
        stepResult = main.ONOSbench.onosStart( main.ONOSip[ main.deadNode ] )
        main.log.info( "Starting onos cli" )
        stepResult = stepResult and main.CLIs[ main.deadNode ].startOnosCli( main.ONOSip[ main.deadNode ] )

        main.log.info( "Adding previously dead node to list of active nodes" )
        main.activeNodes.append( main.deadNode )

        utilities.assert_equals( expect=main.TRUE,
                                 actual=stepResult,
                                 onpass="Successfully brought up onos node %s" % node,
                                 onfail="Failed to bring up onos node %s" % node )


        time.sleep(main.nodeSleep)

    def CASE300( self, main ):
        '''

            Balancing Masters
        '''
        time.sleep(main.balanceSleep)
        main.step( "Balancing Masters" )

        stepResult = main.FALSE
        if main.activeNodes:
            controller = main.activeNodes[0]
            stepResult = utilities.retry( main.CLIs[controller].balanceMasters,
                                          main.FALSE,
                                          [],
                                          sleep=3,
                                          attempts=3 )

        else:
            main.log.error( "List of active nodes is empty" )
        utilities.assert_equals( expect=main.TRUE,
                                 actual=stepResult,
                                 onpass="Balance masters was successfull",
                                 onfail="Failed to balance masters")
        time.sleep(main.balanceSleep)

    def CASE1000( self, main ):
        '''
            Report errors/warnings/exceptions
        '''
        # Compare the slowest Node through total time of each node
        slowestNode = 0
        slowestTotalTime = 0
        # Second capture
        for i in range( 3 ):
            # Calculate total time
            main.allinfo[ 1 ][ 'info' + str( i )][ 'totalTime' ] = main.scaleTopoFunction.getInfoFromLog( main, main.searchTerm[ 'start' ], 'first', main.searchTerm[ 'end' ], 'last', index=i, funcMode='TD' )
            # Compare the total time
            if main.allinfo[ 1 ][ 'info' + str( i ) ][ 'totalTime' ] > slowestTotalTime:
                slowestTotalTime = main.allinfo[ 1 ][ 'info' + str( i ) ][ 'totalTime' ]
                slowestNode = i
            # Calculate switch connection time
            main.allinfo[ 1 ][ 'info' + str( i )][ 'swConnection' ] = main.scaleTopoFunction.getInfoFromLog( main, main.searchTerm[ 'start' ], 'first', main.searchTerm[ 'start' ], 'last', index=i, funcMode='TD' )
            # Calculate the time from last switch connection to the last role request
            main.allinfo[ 1 ][ 'info' + str( i )][ 'lastSwToLastRr' ] = main.scaleTopoFunction.compareTimeDiffWithRoleRequest( main, main.searchTerm[ 'start' ], 'last', index=i )
            # Calculate the time from the last role request to the last topology
            main.allinfo[ 1 ][ 'info' + str( i )][ 'lastRrToLastTopology' ] = main.scaleTopoFunction.compareTimeDiffWithRoleRequest( main, main.searchTerm[ 'end' ], 'last', index=i )
            # Calculate the disconnecti rate
            main.allinfo[ 1 ][ 'info' + str( i )][ 'disconnectRate' ] = main.scaleTopoFunction.getInfoFromLog( main, main.searchTerm[ 'Disconnect' ], 'num', main.searchTerm[ 'start' ],'num', index=i, funcMode='DR' )

        if ( main.allinfo[ 0 ] != main.allinfo[ 1 ] ):
            main.log.error( "The results of two capture are different!" )
        main.log.debug( "The data is " + str( main.allinfo ) )
        if main.writeData != -1:
            main.log.info( "Write the date into database" )
            # write the date into data base
            with open( main.dbFilePath, "a" ) as dbFile:
                temp = str( main.currScale )
                temp += ",'baremetal1'"
                # put result from second capture into data base
                temp += "," + str( "%.2f" % main.allinfo[ 1 ][ 'info' + str( slowestNode )][ 'totalTime' ] )
                temp += "," + str( "%.2f" % main.allinfo[ 1 ][ 'info' + str( slowestNode )][ 'swConnection' ] )
                temp += "," + str( "%.2f" % main.allinfo[ 1 ][ 'info' + str( slowestNode )][ 'lastSwToLastRr' ] )
                temp += "," + str( "%.2f" % main.allinfo[ 1 ][ 'info' + str( slowestNode )][ 'lastRrToLastTopology' ] )
                temp += "," + str( "%.2f" % main.allinfo[ 1 ][ 'info' + str( slowestNode )][ 'disconnectRate' ] )
                temp += "\n"
                dbFile.write( temp )
        else:
            main.log.error( "The data from log is wrong!" )
        main.writeData = 1
        main.case( "Checking logs for errors, warnings, and exceptions" )
        main.log.info( "Error report: \n" )
        main.ONOSbench.logReport( main.ONOSip[ 0 ],
                                                            [ "INFO",
                                                              "FOLLOWER",
                                                              "WARN",
                                                              "flow",
                                                              "ERROR",
                                                              "Except" ],
                                                              "s" )