#!/usr/bin/python

import os
import re
import sys
from argparse import ArgumentParser

# Argument parser
# My own ArgumentParser with single-line stdout output and unknown state Nagios retcode
class NagiosArgumentParser(ArgumentParser):
    def error(self, message):
        sys.stdout.write('UNKNOWN: Bad arguments (see --help): %s\n' % message)
        sys.exit(3)

def parse_args():
    parser = NagiosArgumentParser(description='Adaptec AACRAID status script')
    parser.add_argument('-d', '--disks-only', action="store_true", help='Only disply disk statuses')
    parser.add_argument('-n', '--nagios',     action="store_true", help='Use Nagios-like output and return code')
    return parser.parse_args()

def which(program):
    fpath, fname = os.path.split(program)
    if fpath:
        if is_exe(program):
            return program
    else:
        # Add some defaults
        os.environ["PATH"] += os.pathsep + '/usr/StorMan/arcconf'
        os.environ["PATH"] += os.pathsep + os.path.dirname(os.path.realpath(sys.argv[0]))
        for path in os.environ["PATH"].split(os.pathsep):
            path = path.strip('"')
            exe_file = os.path.join(path, program)
            if is_exe(exe_file):
                return exe_file
    return None

def is_exe(fpath):
    return os.path.isfile(fpath) and os.access(fpath, os.X_OK)

# Get command output
def getOutput(cmd):
    output = os.popen('%s 2>%s' % (cmd, os.devnull))
    lines = []
    for line in output:
        if not re.match(r'^$',line.strip()):
            lines.append(line.strip())
    return lines

def returnControllerNumber(output):
    for line in output:
        if re.match(r'^Controllers found: [0-9]+$',line.strip()):
            return int(line.split(':')[1].strip().strip('.'))

def returnControllerModel(output):
    for line in output:
        if re.match(r'^Controller Model.*$',line.strip()):
            return line.split(':')[1].strip()

def returnControllerStatus(output):
    for line in output:
        if re.match(r'^Controller Status.*$',line.strip()):
            return line.split(':')[1].strip()

def returnArrayIds(output):
    ids = []
    for line in output:
        if re.match(r'^Logical device number [0-9]+$',line.strip()):
            ids.append(line.strip('Logical device number').strip())
    return ids

def returnArrayInfo(output):
    members = []
    for line in output:
        # RAID level may be either N or Simple_Volume
        # (a disk connected to the card, not hotspare, not part of any array)
        if re.match(r'^RAID level\s+: .+$',line.strip()):
            type = line.split(':')[1].strip()
        if re.match(r'^Status of logical device\s+: .*$',line.strip()):
            status = line.split(':')[1].strip()
        if re.match(r'^Size\s+: [0-9]+ MB$',line.strip()):
            size = str(int(line.strip('MB').split(':')[1].strip()) / 1000)
        if re.match(r'^(Group\s[0-9]+,\s)?Segment [0-9]+\s+: .*$',line.strip()):
            splitter = re.compile('(\(.*\))')
            # The line can be either
            # Segment 0 : Present (Controller:1,Enclosure:0,Slot:0) JPW9J0N00RWMUV
            # Or
            # Segment 0 : Present (Controller:1,Channel:0,Device:0) S13PJ1CQ719255
            # Or
            # Segment 0 : Present (Controller:1,Connector:1,Device:2) 9QJ7D0MJ
            line = re.sub('Controller:','',line)
            line = re.sub('(Channel|Enclosure|Connector):','',line)
            line = re.sub('(Device|Slot):','',line)
            line = line.split(':')[1]
            if re.match(r'^ Missing',line):
                members.append('?,?')
            else:
                members.append(splitter.split(line)[1].strip('(').strip(')'))
    return [type,status,size,members]

def returnControllerTasks(output):
    arrayid = False
    type = False
    state = False
    tasks = []
    for line in output:
        if re.match(r'^Logical device\s+: [0-9]+$',line.strip()):
            arrayid = line.split(':')[1].strip()
        if re.match(r'^Current operation\s+: .*$',line.strip()):
            type = line.split(':')[1].strip()
        if re.match(r'^Percentage complete\s+: [0-9]+$',line.strip()):
            state = line.split(':')[1].strip()
        if arrayid != False and type != False and state != False:
            tasks.append([arrayid,type,state])
            arrayid = False
            type = False
            state = False
    return tasks

def returnDisksInfo(output,controllerid):
    diskid = False
    vendor = False
    model = False
    state = False
    serial = False
    disks = []
    for line in output:
        if re.match(r'^Reported Channel,Device(\(T:L\))?\s+: [0-9]+,[0-9]+(\([0-9]+:[0-9]+\))?$',line.strip()):
            diskid = re.split('\s:\s',line)[1].strip()
            diskid = re.sub('\(.*\)','',diskid)
            diskid = str(controllerid)+','+diskid
        if re.match(r'^State\s+:.*$',line.strip()):
            state = line.split(':')[1].strip()
        if re.match(r'^Vendor\s+:.*$',line.strip()):
            vendor = line.split(':')[1].strip()
        if re.match(r'^Model\s+:.*$',line.strip()):
            model = line.split(':')[1].strip()
        if re.match(r'^Serial number\s+:.*$',line.strip()):
            serial = line.split(':')[1].strip()
        if diskid != False and vendor != False and model != False and state != False and serial != False:
            disks.append([diskid, state, vendor, model, serial])
            diskid = False
            vendor = False
            model = False
            state = False
            serial = False
    return disks

config = parse_args()
if config.disks_only:
    printarray = False
    printcontroller = False
else:
    printarray = True
    printcontroller = True

nagiosoutput=''
nagiosgoodctrl = 0
nagiosbadctrl = 0
nagiosctrlbadarray = 0
nagiosgoodarray = 0
nagiosbadarray = 0
nagiosgooddisk = 0
nagiosbaddisk = 0

bad = False

# Find arcconf
for arcconfbin in "arcconf","arcconf.exe":
    arcconfpath = which(arcconfbin)
    if (arcconfpath != None):
        break

# Check binary exists (and +x), if not print an error message
if (arcconfpath != None):
    if is_exe(arcconfpath):
        pass
    else:
        if config.nagios:
            print 'UNKNOWN - Cannot find '+arcconfpath
        else:
            print 'Cannot find ' + arcconfpath + 'in your PATH. Please install it.'
        sys.exit(3)
else:
    print 'Cannot find "arcconf, "arcconf.exe" in your PATH. Please install it.'
    sys.exit(3)


cmd = '"%s" GETVERSION' % arcconfpath
output = getOutput(cmd)
controllernumber = returnControllerNumber(output)

# List controllers
if printcontroller:
    if not config.nagios:
        print '-- Controller informations --'
        print '-- ID | Model | Status'
    controllerid = 1
    while controllerid <= controllernumber:
        cmd = '"%s" GETCONFIG %d' % (arcconfpath, controllerid)
        output = getOutput(cmd)
        controllermodel = returnControllerModel(output)
        controllerstatus = returnControllerStatus(output)
        if controllerstatus != 'Optimal':
            bad = True
            nagiosbadctrl += 1
        else:
            nagiosgoodctrl += 1
        if not config.nagios:
            print 'c'+str(controllerid-1)+' | '+controllermodel+' | '+controllerstatus
        controllerid += 1
        if not config.nagios:
            print ''

# List arrays
if printarray:
    controllerid = 1
    if not config.nagios:
        print '-- Arrays informations --'
        print '-- ID | Type | Size | Status | Task | Progress'
    while controllerid <= controllernumber:
        arrayid = 0
        cmd = '"%s" GETCONFIG %s' % (arcconfpath, controllerid)
        output = getOutput(cmd)
        arrayids = returnArrayIds(output)
        for arrayid in arrayids:
            cmd = '"%s" GETCONFIG %s LD %s' % (arcconfpath, controllerid, arrayid)
            output = getOutput(cmd)
            arrayinfo = returnArrayInfo(output)
            if arrayinfo[1] != 'Optimal':
                nagiosbadarray += 1
                bad = True
            else:
                nagiosgoodarray += 1
            cmd = '"%s" GETSTATUS %s', (arcconfpath, controllerid)
            output = getOutput(cmd)
            tasksinfo = returnControllerTasks(output)
            done = False
            # Usually it should return either [0-9] or Simple_Volume but...
            # It can also return "6 Reed-Solomon" so we need to handle this too...
            # So let's match [0-9] followed by a space or EOL.
            if re.match('^[0-9]+(\s|$)',arrayinfo[0]):
                raidtype = re.sub('^','RAID',arrayinfo[0])
            else:
                raidtype = arrayinfo[0]
            for tasks in tasksinfo:
                if int(tasks[0]) == int(arrayid):
                    if not config.nagios:
                        print 'c'+str(controllerid-1)+'u'+str(arrayid)+' | '+raidtype+' | '+arrayinfo[2]+'G | '+arrayinfo[1]+' | '+tasks[1]+' | '+tasks[2]+'%'
                    done = True
                    break
            if done == False:
                if not config.nagios:
                    print 'c'+str(controllerid-1)+'u'+str(arrayid)+' | '+raidtype+' | '+arrayinfo[2]+'G | '+arrayinfo[1]
        controllerid += 1
    if not config.nagios:
        print ''

# List disks
controllerid = 1
if not config.nagios:
    print '-- Disks informations'
    print '-- ID | Model | Status'
while controllerid <= controllernumber:
    arrayid = 0
    cmd = '"%s" GETCONFIG %s' % (arcconfpath, controllerid)
    output = getOutput(cmd)
    arrayids = returnArrayIds(output)


    cmd = '"%s" GETCONFIG %d PD' % (arcconfpath, controllerid)
    output = getOutput(cmd)
    diskinfo = returnDisksInfo(output,controllerid)
    no_array_disk_id = 0
    for disk in diskinfo:

        # Generic verification no matter is the disk is member of an array or not
        if disk[1] != 'Online' and disk[1] != 'Hot Spare' and disk[1] != 'Ready' and disk[1] != 'Global Hot-Spare':
            bad = True
            nagiosbaddisk += 1
        else:
            nagiosgooddisk += 1

        array_member = False
        for arrayid in arrayids:
            cmd = '"%s" GETCONFIG %s LD %s' % (arcconfpath, controllerid, arrayid)
            output = getOutput(cmd)
            arrayinfo = returnArrayInfo(output)

            # Try to attach current disk to array (loop)
            memberid = 0
            for member in arrayinfo[3]:

                # Matched in members of this array
                if disk[0] == member:
                    if not config.nagios:
                        print 'c'+str(controllerid-1)+'u'+str(arrayid)+'d'+str(memberid)+' | '+disk[2]+' '+disk[3]+' '+disk[4]+' | '+disk[1]
                    array_member = True
                    memberid += 1

        # Some disks may not be attached to any array (ie: global hot spare)
        if not array_member:
            if not config.nagios:
                print 'c'+str(controllerid-1)+'uX'+'d'+str(no_array_disk_id)+' | '+disk[2]+' '+disk[3]+' '+disk[4]+' | '+disk[1]
            no_array_disk_id += 1

    controllerid += 1

if config.nagios:
    if bad:
        print('RAID ERROR - Controllers OK:%d Bad:%d - Arrays OK:%d Bad:%d - Disks OK:%d Bad:%d' % (nagiosgoodctrl, nagiosbadctrl, nagiosgoodarray, nagiosbadarray, nagiosgooddisk, nagiosbaddisk))
        sys.exit(2)
    else:
        print('RAID OK - Controllers OK:%d Bad:%d - Arrays OK:%d Bad:%d - Disks OK:%d Bad:%d' % (nagiosgoodctrl, nagiosbadctrl, nagiosgoodarray, nagiosbadarray, nagiosgooddisk, nagiosbaddisk))
else:
    if bad:
        print '\nThere is at least one disk/array in a NOT OPTIMAL state.'
        print '\nUse "arcconf GETCONFIG [1-9]" to get details.'
        sys.exit(1)