#!/usr/bin/python

import argparse                   # Argument parser
import re                         # For regex
import paramiko                   # For remote ssh

from esxi_vm_functions import *


# Defaults and Variable setup
ConfigData = setup_config()
NAME = ""
LOG = ConfigData['LOG']
isDryRun = ConfigData['isDryRun']
isVerbose = ConfigData['isVerbose']
isSummary = ConfigData['isSummary']
HOST = ConfigData['HOST']
PORT = ConfigData['PORT']
USER = ConfigData['USER']
PASSWORD = ConfigData['PASSWORD']
KEY = ConfigData['KEY']
CPU = ConfigData['CPU']
MEM = ConfigData['MEM']
HDISK = int(ConfigData['HDISK'])
DISKFORMAT = ConfigData['DISKFORMAT']
VIRTDEV = ConfigData['VIRTDEV']
STORE = ConfigData['STORE']
NET = ConfigData['NET']
ISO = ConfigData['ISO']
GUESTOS = ConfigData['GUESTOS']
VMXOPTS = ConfigData['VMXOPTS']

ErrorMessages = ""
MAC = ""
GeneratedMAC = ""
ISOfound = False
CheckHasErrors = False
LeastUsedDS = ""
DSPATH = ""
DSSTORE = ""
FullPathExists = False

#
#      Process Arguments
#
parser = argparse.ArgumentParser(description='ESXi Create VM utility.')

parser.add_argument('-d', '--dry', dest='isDryRunarg', action='store_true',
                    help="Enable Dry Run mode  (" + str(isDryRun) + ")")
parser.add_argument("-H", "--Host", dest='HOST', type=str, help="ESXi Host/IP  (" + str(HOST) + ")")
parser.add_argument("-T", "--Port", dest='PORT', type=int, help="ESXi Port number  (" + str(PORT) + ")")
parser.add_argument("-U", "--User", dest='USER', type=str, help="ESXi Host username  (" + str(USER) + ")")
parser.add_argument("-P", "--Password", dest='PASSWORD', type=str, help="ESXi Host password  (*****)")
parser.add_argument("-K", "--Key", dest='KEY', type=str, help="ESXi Host connection key (path to private key)")
parser.add_argument("-n", "--name", dest='NAME', type=str, help="VM name")
parser.add_argument("-c", "--cpu", dest='CPU', type=int, help="Number of vCPUS  (" + str(CPU) + ")")
parser.add_argument("-m", "--mem", type=int, help="Memory in GB  (" + str(MEM) + ")")
parser.add_argument("-v", "--vdisk", dest='HDISK', type=str, help="Size of virt hdisk  (" + str(HDISK) + ")")
parser.add_argument("-i", "--iso", dest='ISO', type=str, help="CDROM ISO Path | None  (" + str(ISO) + ")")
parser.add_argument("-N", "--net", dest='NET', type=str, help="Network Interface | None  (" + str(NET) + ")")
parser.add_argument("-M", "--mac", dest='MAC', type=str, help="MAC address")
parser.add_argument("-S", "--store", dest='STORE', type=str, help="vmfs Store | LeastUsed  (" + str(STORE) + ")")
parser.add_argument("-g", "--guestos", dest='GUESTOS', type=str, help="Guest OS. (" + str(GUESTOS) + ")")
parser.add_argument("-o", "--options", dest='VMXOPTS', type=str, default='NIL', help="Comma list of VMX Options.")
parser.add_argument('-V', '--verbose', dest='isVerbosearg', action='store_true',
                    help="Enable Verbose mode  (" + str(isVerbose) + ")")
parser.add_argument('--summary', dest='isSummaryarg', action='store_true',
                    help="Display Summary  (" + str(isSummary) + ")")
parser.add_argument("-u", "--updateDefaults", dest='UPDATE', action='store_true',
                    help="Update Default VM settings stored in ~/.esxi-vm.yml")


args = parser.parse_args()

if args.isDryRunarg:
    isDryRun = True
if args.isVerbosearg:
    isVerbose = True
if args.isSummaryarg:
    isSummary = True
if args.HOST:
    HOST = args.HOST
if args.PORT:
    PORT = args.PORT
if args.USER:
    USER = args.USER
if args.PASSWORD:
    PASSWORD = args.PASSWORD
if args.KEY:
    KEY = args.KEY
if args.NAME:
    NAME = args.NAME
if args.CPU:
    CPU = int(args.CPU)
if args.mem:
    MEM = int(args.mem)
if args.HDISK:
    HDISK = int(args.HDISK)
if args.ISO:
    ISO = args.ISO
if args.NET:
    NET = args.NET
if args.MAC:
    MAC = args.MAC
if args.STORE:
    STORE = args.STORE
if STORE == "":
    STORE = "LeastUsed"
if args.GUESTOS:
    GUESTOS = args.GUESTOS
if args.VMXOPTS == '' and VMXOPTS != '':
    VMXOPTS = ''
if args.VMXOPTS and args.VMXOPTS != 'NIL':
    VMXOPTS = args.VMXOPTS.split(",")


if args.UPDATE:
    print("Saving new Defaults to ~/.esxi-vm.yml")
    ConfigData['isDryRun'] = isDryRun
    ConfigData['isVerbose'] = isVerbose
    ConfigData['isSummary'] = isSummary
    ConfigData['HOST'] = HOST
    ConfigData['PORT'] = PORT
    ConfigData['USER'] = USER
    ConfigData['PASSWORD'] = PASSWORD
    ConfigData['KEY'] = KEY
    ConfigData['CPU'] = CPU
    ConfigData['MEM'] = MEM
    ConfigData['HDISK'] = HDISK
    ConfigData['DISKFORMAT'] = DISKFORMAT
    ConfigData['VIRTDEV'] = VIRTDEV
    ConfigData['STORE'] = STORE
    ConfigData['NET'] = NET
    ConfigData['ISO'] = ISO
    ConfigData['GUESTOS'] = GUESTOS
    ConfigData['VMXOPTS'] = VMXOPTS
    save_config(ConfigData)
    if NAME == "":
        sys.exit(0)

#
#      main()
#
LogOutput = '{'
LogOutput += '"datetime":"{}",'.format(the_current_date_time())

if NAME == "":
    print("ERROR: Missing required option --name")
    sys.exit(1)

try:
    ssh = paramiko.SSHClient()
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    ssh.connect(HOST, port=PORT, username=USER, password=PASSWORD, key_filename=KEY)

    (stdin, stdout, stderr) = ssh.exec_command("esxcli system version get |grep Version")
    type(stdin)
    if re.match("Version", str(stdout.readlines())) is not None:
        print("Unable to determine if this is a ESXi Host: {}, port: {}, username: {}".format(HOST, PORT, USER))
        sys.exit(1)
except Exception as e:
    print("The Error is {}".format(e))
    print("Unable to access ESXi Host: {}, port: {}, username: {}".format(HOST, PORT, USER))
    sys.exit(1)

try:
    (stdin, stdout, stderr) = \
        ssh.exec_command("esxcli storage filesystem list |grep '/vmfs/volumes/.*true  VMFS' |sort -nk7")
    type(stdin)
    VOLUMES = {}
    for line in stdout.readlines():
        splitLine = line.split()
        VOLUMES[splitLine[0]] = splitLine[1]
        LeastUsedDS = splitLine[1]
except Exception as e:
    print("The Error is {}".format(e))
    sys.exit(1)

if STORE == "LeastUsed":
    STORE = LeastUsedDS


try:
    (stdin, stdout, stderr) = \
        ssh.exec_command("esxcli network vswitch standard list|grep Portgroups|sed 's/^   Portgroups: //g'")
    type(stdin)
    VMNICS = []
    for line in stdout.readlines():
        splitLine = re.split('[,\n]', line)
        VMNICS.append(splitLine[0])
except Exception as e:
    print("The Error is {}".format(e))
    sys.exit(1)

MACarg = MAC
if MAC != "":
    MACregex = '^([a-fA-F0-9]{2}[:|\-]){5}[a-fA-F0-9]{2}$'
    if re.compile(MACregex).search(MAC):
        # Full MAC found. OK
        MAC = MAC.replace("-", ":")
    elif re.compile(MACregex).search("00:50:56:" + MAC):
        MAC = "00:50:56:" + MAC.replace("-", ":")
    else:
        print("ERROR: {} Invalid MAC address.".format(MAC))
        ErrorMessages += " " + MAC + " Invalid MAC address."
        CheckHasErrors = True

ISOarg = ISO
if ISO == "None":
    ISO = ""
if ISO != "":
    try:
        #  If ISO has no "/", try to find the ISO
        if not re.match('/', ISO):
            (stdin, stdout, stderr) = \
                ssh.exec_command("find /vmfs/volumes/ -type f -name " + ISO +
                                 " -exec sh -c 'echo $1; kill $PPID' sh {} 2>/dev/null \;")
            type(stdin)
            FoundISOPath = str(stdout.readlines()[0]).strip('\n')
            if isVerbose:
                print("FoundISOPath: {}".format(FoundISOPath))
            ISO = str(FoundISOPath)

        (stdin, stdout, stderr) = ssh.exec_command("ls " + str(ISO))
        type(stdin)
        if stdout.readlines() and not stderr.readlines():
            ISOfound = True

    except Exception as e:
        print("The Error is {}".format(e))
        sys.exit(1)

VMID = -1
try:
    (stdin, stdout, stderr) = ssh.exec_command("vim-cmd vmsvc/getallvms")
    type(stdin)
    for line in stdout.readlines():
        splitLine = line.split()
        if NAME == splitLine[1]:
            VMID = splitLine[0]
            print("ERROR: VM {} already exists.".format(NAME))
            ErrorMessages += " VM " + NAME + " already exists."
            CheckHasErrors = True
except Exception as e:
    print("The Error is {}".format(e))
    sys.exit(1)

#  Check CPU
if CPU < 1 or CPU > 128:
    print("{} CPU out of range. [1-128].".format(CPU))
    ErrorMessages += " {} CPU out of range. [1-128].".format(CPU)
    CheckHasErrors = True

#  Check MEM
if MEM < 1 or MEM > 4080:
    print("{} GB Memory out of range. [1-4080].".format(MEM))
    ErrorMessages += " {} GB Memory out of range. [1-4080].".format(MEM)
    CheckHasErrors = True

#  Check HDISK
if HDISK < 1 or HDISK > 63488:
    print("Virtual Disk size {} GB out of range. [1-63488].".format(HDISK))
    ErrorMessages += " Virtual Disk size {} GB out of range. [1-63488].".format(HDISK)
    CheckHasErrors = True

#  Convert STORE to path and visa-versa
V = []
for Path in VOLUMES:
    V.append(VOLUMES[Path])
    if STORE == Path or STORE == VOLUMES[Path]:
        DSPATH = Path
        DSSTORE = VOLUMES[Path]

if DSSTORE not in V:
    print("ERROR: Disk Storage {} doesn't exist. ".format(STORE))
    print("    Available Disk Stores: {}".format([str(item) for item in V]))
    print("    LeastUsed Disk Store : {}".format(LeastUsedDS))
    ErrorMessages += " Disk Storage " + STORE + " doesn't exist. "
    CheckHasErrors = True

#  Check NIC  (NIC record)
if (NET not in VMNICS) and (NET != "None"):
    print("ERROR: Virtual NIC {} doesn't exist.".format(NET))
    print("    Available VM NICs: {} or 'None'".format([str(item) for item in VMNICS]))
    ErrorMessages += " Virtual NIC {} doesn't exist.".format(NET)
    CheckHasErrors = True

#  Check ISO exists
if ISO != "" and not ISOfound:
    print("ERROR: ISO {} not found.  Use full path to ISO".format(ISO))
    ErrorMessages += " ISO {} not found.  Use full path to ISO".format(ISO)
    CheckHasErrors = True

#  Check if DSPATH/NAME already exists
try:
    FullPath = DSPATH + "/" + NAME
    (stdin, stdout, stderr) = ssh.exec_command("ls -d " + FullPath)
    type(stdin)
    if stdout.readlines() and not stderr.readlines():
        print("ERROR: Directory {} already exists.".format(FullPath))
        ErrorMessages += " Directory {} already exists.".format(FullPath)
        CheckHasErrors = True
except Exception as e:
    pass

vmx = {
    'config.version': '8',
    'virtualHW.version': '8',
    'vmci0.present': 'TRUE',
    'displayName': NAME,
    'floppy0.present': 'FALSE',
    'numvcpus': CPU,
    'scsi0.present': 'TRUE',
    'scsi0.sharedBus': 'none',
    'scsi0.virtualDev': 'pvscsi',
    'memsize': str(MEM * 1024),
    'scsi0:0.present': 'TRUE',
    'scsi0:0.fileName': "{}.vmdk".format(NAME),
    'scsi0:0.deviceType': 'scsi-hardDisk',
    'pciBridge0.present': 'TRUE',
    'pciBridge4.present': 'TRUE',
    'pciBridge4.virtualDev': 'pcieRootPort',
    'pciBridge4.functions': '8',
    'pciBridge5.present': 'TRUE',
    'pciBridge5.virtualDev': 'pcieRootPort',
    'pciBridge5.functions': '8',
    'pciBridge6.present': 'TRUE',
    'pciBridge6.virtualDev': 'pcieRootPort',
    'pciBridge6.functions': '8',
    'pciBridge7.present': 'TRUE',
    'pciBridge7.virtualDev': 'pcieRootPort',
    'pciBridge7.functions': '8',
    'guestOS': GUESTOS
}

if ISO == "":
    vmx.update({
        'ide1:0.present': 'TRUE',
        'ide1:0.fileName': 'emptyBackingString',
        'ide1:0.deviceType': 'atapi-cdrom',
        'ide1:0.startConnected': 'FALSE',
        'ide1:0.clientDevice': 'TRUE'
    })
else:
    vmx.update({
        'ide1:0.present': 'TRUE',
        'ide1:0.fileName': ISO,
        'ide1:0.deviceType': 'atapi-cdrom',
        'ide1:0.startConnected': 'TRUE',
    })

if NET != "None":
    vmx.update({
        'ethernet0.virtualDev': 'vmxnet3',
        'ethernet0.present': 'TRUE',
        'ethernet0.networkName': NET
    })
    if MAC == "":
        vmx.update({'ethernet0.addressType': 'generated'})
    else:
        vmx.update({
            'ethernet0.addressType': 'static',
            'ethernet0.address': MAC
        })

for VMXopt in VMXOPTS:
    try:
        k, v = VMXopt.split("=")
    except Exception:
        k = ""
        v = ""
    key = k.lstrip().strip()
    value = v.lstrip().strip()
    vmx[key] = value

if isVerbose and VMXOPTS != '':
    print("VMX file:")
    for k, v in vmx.items():
        print('{} = "{}"'.format(k, v))

MyVM = FullPath + "/" + NAME
if CheckHasErrors:
    Result = "Errors"
else:
    Result = "Success"

if not isDryRun and not CheckHasErrors:
    try:
        if isVerbose:
            print("Create {}.vmx file".format(NAME))
        (stdin, stdout, stderr) = ssh.exec_command("mkdir {}".format(FullPath))
        type(stdin)
        for k, v in vmx.items():
            (stdin, stdout, stderr) = ssh.exec_command("echo '{} = \"{}\"' >> {}.vmx".format(k, v, MyVM))
            type(stdin)

        if isVerbose:
            print("Create {}.vmdk file".format(NAME))
        (stdin, stdout, stderr) = \
            ssh.exec_command("vmkfstools -c {}G -d {} {}.vmdk".format(HDISK, DISKFORMAT, MyVM))
        type(stdin)

        if isVerbose:
            print("Register VM")
        (stdin, stdout, stderr) = ssh.exec_command("vim-cmd solo/registervm {}.vmx".format(MyVM))
        type(stdin)
        VMID = int(stdout.readlines()[0])

        if isVerbose:
            print("Power ON VM")
        (stdin, stdout, stderr) = ssh.exec_command("vim-cmd vmsvc/power.on {}".format(VMID))
        type(stdin)
        if stderr.readlines():
            print("Error Powering-on VM.")
            Result = "Fail"

        if NET != "None":
            (stdin, stdout, stderr) = ssh.exec_command(
                "grep -i 'ethernet0.*ddress = ' {}.vmx |tail -1|awk '{print $NF}'".format(MyVM))
            type(stdin)
            GeneratedMAC = str(stdout.readlines()[0]).strip('\n"')

    except Exception as e:
        print("There was an error creating the VM.")
        ErrorMessages += " There was an error creating the VM."
        Result = "Fail"

LogOutput += '"Host":"{}","Port":"{}","Name":"{}",'.format(HOST, PORT, NAME)
LogOutput += '"CPU":"{}","Mem":"{}",'.format(CPU, MEM)
LogOutput += '"Hdisk":"{}","DiskFormat":"{}","Virtual Device":"{}",'.format(HDISK, DISKFORMAT, VIRTDEV)
LogOutput += '"Store":"{}","Store Used":"{}",'.format(STORE, DSPATH)
LogOutput += '"Network":"{}",'.format(NET)
LogOutput += '"ISO":"{}","ISO used":"{}",'.format(ISOarg, ISO)
LogOutput += '"Guest OS":"{}",'.format(GUESTOS)
LogOutput += '"MAC":"{}","MAC Used":"'.format(MACarg, GeneratedMAC)
LogOutput += '"Dry Run":"{}","Verbose":"{}",'.format(isDryRun, isVerbose)
if ErrorMessages != "":
    LogOutput += '"Error Message":"{}",'.format(ErrorMessages)
LogOutput += '"Result":"{}","Completion Time":"{}"'.format(Result, the_current_date_time())
LogOutput += '}\n'
try:
    with open(LOG, "a") as FD:
        FD.write(LogOutput)
except Exception as e:
    print("Error writing to log file: {}".format(LOG))

if isSummary:
    if isDryRun:
        print("\nDry Run summary:")
    else:
        print("\nCreate VM Success:")

    if isVerbose:
        print("ESXi Host: {}".format(HOST))
        print("ESXi Port: {}".format(PORT))
    print("VM NAME: {}".format(NAME))
    print("vCPU: {}".format(CPU))
    print("Memory: {} GB".format(MEM))
    print("VM Disk: {} GB".format(HDISK))
    if isVerbose:
        print("Format: {}".format(DISKFORMAT))
    print("DS Store: {}".format(DSSTORE))
    print("Network: {}".format(NET))
    if ISO:
        print("ISO: {}".format(ISO))
    if isVerbose:
        print("Guest OS: {}".format(GUESTOS))
        print("MAC: {}".format(GeneratedMAC))
else:
    pass

if CheckHasErrors:
    if isDryRun:
        print("Dry Run: Failed.")
    sys.exit(1)
else:
    if isDryRun:
        print("Dry Run: Success.")
    else:
        print(GeneratedMAC)
    sys.exit(0)