#!/usr/bin/python

# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

try:
    import json
except ImportError:
    import simplejson as json

from optparse import OptionParser
import sys
import os
import getpass
import shlex
import ansible.runner
import ansible.playbook
import ansible.constants as C
from optparse import OptionParser

class Cli(object):

    def __init__(self):
        pass

    def runner(self):
        parser = OptionParser()
        parser.add_option("-a", "--args", dest="module_args",
            help="module arguments", default=C.DEFAULT_MODULE_ARGS)
        parser.add_option('-f','--forks', dest='forks', default=C.DEFAULT_FORKS, type='int',
            help='set the number of forks to start up')
        parser.add_option("-p", "--host-pattern", dest="hosts",
            help="hostname glob or group name", default=C.DEFAULT_PATTERN)
        parser.add_option("-i", "--inventory", dest="inventory",
           help="inventory host list", default=C.DEFAULT_HOST_LIST)
        parser.add_option("-k", "--ask-pass", default=False, action="store_true",
            help="ask the user to input the ssh password for connecting")
        parser.add_option("-m", "--module-path", dest="module_path",
           help="path to module library", default=C.DEFAULT_MODULE_PATH)
        parser.add_option("-n", "--name", dest="module_name",
            help="module name to execute", default=None)
        parser.add_option('-o', '--one-line', dest='one_line', action='store_true',
            help="try to print output on one line")
        parser.add_option('-t', '--tree', dest='tree', default=None,
            help="if specified, a directory name to save output to, one file per host")
        parser.add_option('-T', '--timeout', default=C.DEFAULT_TIMEOUT, type='int',
            dest='timeout', help="set the timeout in seconds for ssh")
        parser.add_option('-u', '--user', default=C.DEFAULT_REMOTE_USER,
            dest='remote_user', help='set the default username')
        options, args = parser.parse_args()

        if options.module_name is None:
            print >> sys.stderr, "-n is required"
            sys.exit(1)

        # TODO: more shell like splitting on module_args would
        # be a good idea

        sshpass = None
        if options.ask_pass:
            sshpass = getpass.getpass(prompt="SSH password: ")

        self.options = options

        runner = ansible.runner.Runner(
            module_name=options.module_name,
            module_path=options.module_path,
            module_args=shlex.split(options.module_args),
            remote_user=options.remote_user,
            remote_pass=sshpass,
            host_list=options.inventory,
            timeout=options.timeout,
            forks=options.forks,
            pattern=options.hosts,
            verbose=True,
        )
        return runner

    def output(self, results):

        # if specifying output destination (aka tree output saves), create the
        # directory to output to

        options = self.options

        # TODO: split into function 
        if options.tree:
            if options.tree[0] != '/':
                options.tree = os.path.realpath(os.path.expanduser(options.tree))
            if not os.path.exists(options.tree):
                try:
                    os.makedirs(options.tree)
                except (IOError, OSError), e:
                    print >> sys.stderr, "Could not make dir %s: %s" % (options.tree, e)
                    sys.exit(1)
            if not os.access(options.tree, os.W_OK):
                print >> sys.stderr, "Cannot write to path %s" % options.tree
                sys.exit(1)

        # now walk results and print output

        module_name = self.options.module_name
        
        for hostname in sorted(results['contacted']):
            result    = results['contacted'][hostname]
            rc        = 0
            failed    = False
            stdout    = None
            stderr    = None
            traceback = None
            error     = None
            if type(result) == dict:
                failed    = result.get('failed', 0)
                if module_name == 'command':
                    rc        = result.get('rc',0)
                    stdout    = result.get('stdout', '')
                    stderr    = result.get('stderr', '')
                    traceback = result.get('traceback', '')
                    error     = result.get('error', '')

            # detect and show failures, if any
            if rc != 0 or failed:
                msg = "Error: %s: \n" % hostname
                if stdout:
                    msg += stdout
                if stderr:
                    msg += stderr
                if traceback:
                    msg += traceback
                if error:
                    msg += error
                print >> sys.stderr, msg
                continue

            if options.one_line:
                # try to print everything on one line, but don't strip newlines
                # if the command output happend to be too long
                if module_name == 'command':
                    msg = "(stdout) %s" % stdout
                    if stderr.rstrip() != '':
                        msg = "(stdout) %s (stderr) %s" % (stdout,stderr)
                    print "%s | rc=%s | %s" % (
                        hostname, rc, msg
                    ) 
                else:
                    print "%s | %s" % (hostname, result)
            else:
                # summarize response from command in multiple lines
                if module_name == 'command':
                    buf = ''
                    buf += "%s | rc=%s >>\n" % (hostname, rc)
                    buf += stdout
                    if stderr:
                        buf += stderr
                    print buf
                    if options.tree:
                        path = os.path.join(options.tree, hostname)
                        fd = open(path, "w+")
                        fd.write(buf)
                        fd.close()
                else:
                    print "%s >>" % hostname
                    print json.dumps(result, indent=4, sort_keys=True)

        if len(results['dark'].keys()) > 0:
            print >> sys.stderr, "*** Hosts which could not be contacted or did not respond: ***"
            failed_hosts = results['dark'].keys()
            for hostname in failed_hosts:
                print >> sys.stderr, "%s:\n%s\n" % (hostname, results['dark'][hostname])
            print ""

if __name__ == '__main__':
    cli = Cli()
    cli.output(cli.runner().run())