#!/usr/bin/env python3
from pyVmomi import vim
import pyVim.connect
import atexit
import argparse
from pprint import pprint
import sys
import siteconf
            
site_conf = siteconf.read()


def get_args():
    parser = argparse.ArgumentParser(
        description='Reads vm names from stdin, removes all snapshots.')

    parser.add_argument('-s', '--site',
                        required=True,
                        action='store',
                        help='name of the site to connect to')

    args = parser.parse_args()
    return args

def get_obj(content, vimtype, name):
    """
    Return an object by name, if name is None the
    first found object is returned
    """ 
    obj = None
    container = content.viewManager.CreateContainerView(
        content.rootFolder, vimtype, True)
    for c in container.view:
        if name:
            if c.name == name:
                obj = c
                break
        else:
            obj = c
            break                                                               
    return obj      


def wait_for_task(task):
    """ wait for a vCenter task to finish """
    task_done = False
    while not task_done:
        if task.info.state == 'success':
            return task.info.result

        if task.info.state == 'error':
            print("there was an error")
            task_done = True

def snapshots(snaplist, depth=0):
    snapshot_data = []
    for s in snaplist:
        text = ". " * depth + "(%s) %s / %s" % (s.state, s.name, s.createTime)
        snapshot_data.append(text)
        snapshot_data = snapshot_data + snapshots(s.childSnapshotList, depth + 1)
    return snapshot_data


def main():
    args = get_args()

    if not args.site in site_conf:
        print(f"site not found: {args.site}")
        exit(1)
    host = site_conf[args.site]['vcenter']
    user = site_conf[args.site]['vcenter_user']
    passwd = site_conf[args.site]['vcenter_passwd']


    si = pyVim.connect.SmartConnect(
        host = host,
        user = user,
        pwd = passwd,
        disableSslCertValidation = True
        )
    atexit.register(pyVim.connect.Disconnect, si)
    content = si.RetrieveContent()

    while True:
        vmname = sys.stdin.readline()
        if vmname == '': break # EOF
        vmname = vmname.rstrip()
        if vmname == '': continue # empty line
        vm = get_obj(content, [vim.VirtualMachine], vmname)
        if vm == None:
            print("vm not found: "+ vmname)
            continue
        if vm.snapshot is None:
            print("vm has no snapshots: "+ vmname)
            continue
        print("removing all snapshots of: "+ vmname)
        snaplist = snapshots(vm.snapshot.rootSnapshotList)
        for s in snaplist:
            print("  "+  s)

        wait_for_task(vm.RemoveAllSnapshots())
        if vm.snapshot is None:
            print("done.")
        else:
            print("warning: vm has still snapshots!")


if __name__ == "__main__":
    main()

# vim: set tabstop=4 shiftwidth=4 expandtab smarttab: