#!/usr/bin/python

import os
import re
import sys

binarypath = "/usr/sbin/megasasctl"

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

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

# Check binary exists (and +x), if not print an error message
if os.path.exists(binarypath) and os.access(binarypath, os.X_OK):
	pass
else:
	sys.exit(3)

# Get command output
def getOutput(cmd):
    output = os.popen(cmd)
    lines = []
    for line in output:
        if not re.match(r'^$',line.strip()):
            lines.append(line.strip())
    return lines
    
def returnDiskList(output):
    lines = []
    for line in output:
        if re.match(r'^[a-z][0-9]+[a-z][0-9\*]+[a-z][0-9]+\s.*$',line.strip()):
            list = line.split()
            # Let's hack... Some disk may report smart error after status
            # Get theses errors, join them into one list item and place it
            # before status
            errindex = False
            try:
                errindex = list.index('errs:')
            except ValueError:
                pass
            if errindex:
                list.insert(errindex-1, ' '.join(list[errindex:]))
                list = list[:errindex+1]
            lines.append(list)
    if fake_failure:
        lines[0][-1] = 'BAD'
    return lines

def returnArrayList(output):
    lines = []
    for line in output:
        if re.match(r'^[a-z][0-9]+[a-z][0-9]+\s.*$',line.strip()):
            lines.append(line.split())
    if fake_failure:
        lines[0][-1] = 'DEGRADED'
    return lines

# A way to force a fake failure
fake_failure = False
if os.path.exists('/root/fake_megaraid_failure'):
    fake_failure = True

cmd = binarypath+' -v'
output = getOutput(cmd)
disklist = returnDiskList(output)
arraylist = returnArrayList(output)

if printarray:
    print '-- Arrays informations --'
    print '-- ID | Type | Size | Status'
    for array in arraylist:
        print array[0]+' | '+array[2]+' '+array[3]+' | '+array[1]+' | '+array[-1]
    print ''

print '-- Disks informations'
print '-- ID | Model | Status | Warnings'
for disk in disklist:
    # Check if there's some smart non critical warnings
    if re.match(r'^errs:.*$', disk[-2]):
        # Some disk may have vendor or model containing spaces
        print disk[0]+' | '+' '.join(disk[1:-3])+' | '+disk[-1]+' | '+disk[-2]
    else:
        print disk[0]+' | '+' '.join(disk[1:-2])+' | '+disk[-1]

# Check if there's a bad disk
bad = False
for array in arraylist:
    if not array[-1] == 'optimal':
        bad = True

for disk in disklist:
    if not disk[-1] == 'online' and not disk[-1] == 'hotspare':
        bad = True

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