#!/usr/bin/python

import os
import re
import sys

if len(sys.argv) > 2:
    print 'Usage: megaide-status [-d]'
    sys.exit(1)

printarray = True
printcontroller = True
if len(sys.argv) > 1:
    if sys.argv[1] == '-d':
        printarray = False
        printcontroller = False
    else:
        print 'Usage: megaide-status [-d]'
        sys.exit(1)

def returnControllerNumber():
    for dir in os.listdir('/proc/megaide/'):
        # We don't really care about how many entries are
	# First is 0, last one is number
        number=dir
    return int(number)

def returnArrayNumber(controllerid):
    list()
    for array in os.listdir('/proc/megaide/'+str(controllerid)+'/logicaldrives/'):
        absopath='/proc/megaide/'+str(controllerid)+'/logicaldrives/'+array
	if os.system('grep -q "This logical drive is not present" '+absopath):
            return int(array.strip('_info').strip('log_drv_'))

def returnArrayInfo(controllerid,arrayid):
    id = 'c'+str(controllerid)+'u'+str(arrayid)
    f = open('/proc/megaide/'+str(controllerid)+'/logicaldrives/'+'log_drv_'+str(arrayid)+'_info')
    for line in f:
        if re.match(r'^RAID Level :.*$',line.strip()):
            type = 'RAID'+line.split('Status')[0].strip().split()[4]
        if re.match(r'^Sectors :.*$',line.strip()):
            size = line.split('Stripe Size')[0].split(':')[1].strip()
	    size = str(int(round(float(size) * 512 / 1000 / 1000 / 1000)))+'G'
        if re.match(r'^.*Status :.*$',line.strip()):
            state = line.split('Status')[1].split(':')[1].strip()
    f.close()
    return [id,type,size,state]

def returnDiskInfo():
    # Megaide module report all available port, even there's no disk on it
    # The problem is that an used offline disk will be reported as NOT PRESET
    # So we can't know if it's not used or failed
    # Let's use a conf file for this
    # Conf file should looks like:
    # c0u0d0
    # c0u0d2
    # If logical drive 0 uses disk 0 and disk 2 (chan0 disk0, chan1 disk 0)
    f = open('/etc/megaide-status.conf')
    table = []
    for line in f:
        if re.match('^c[0-9]+u[0-9]+p[0-9]+$',line.strip()):
            # Valid disk entry
            controllerid=line.split('u')[0].strip().strip('c')
            diskid=line.split('p')[1].strip()
	    id=line.strip()
            f2 = open('/proc/megaide/'+controllerid+'/physicaldrives/phy_drv_'+diskid+'_info')
            for line in f2:
                if re.match('^Model No :.*$',line.strip()):
                    model=line.split(':')[1].strip()
                if re.match('^Status :.*$',line.strip()):
                    state=line.split()[2].strip()
                if re.match('^Drive is Not Present.*$',line.strip()):
		    model='Unknown'
                    state='OFFLINE'
	    f2.close()
            table.append([id, state, model])
    f.close()
    return table

controllernumber = returnControllerNumber()

bad = False

if printarray:
    controllerid = 0
    print '-- Arrays informations --'
    print '-- ID | Type | Size | Status'
    while controllerid <= controllernumber:
        arrayid = 0
    	arraynumber = returnArrayNumber(controllerid)
        while arrayid <= arraynumber:
            arrayinfo = returnArrayInfo(controllerid,arrayid)
	    print arrayinfo[0]+' | '+arrayinfo[1]+' | '+arrayinfo[2]+' | '+arrayinfo[3]
	    arrayid += 1
            if not arrayinfo[3] == 'ONLINE':
                bad=True
        controllerid += 1
    print ''

print '-- Disks informations'
print '-- ID | Model | Status'

controllerid = 0
while controllerid <= controllernumber:
    diskinfo = returnDiskInfo()
    for disk in diskinfo:
        print disk[0]+' | '+disk[2]+' | '+disk[1]
        if not disk[1] == 'ONLINE':
            bad=True
    controllerid += 1

if bad:
    print '\nThere is at least one disk/array in a NOT OPTIMAL state.'
    sys.exit(1)