#!/usr/bin/env 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/>.

#######################################################

import sys
import os
import stat

import ansible.playbook
import ansible.constants as C
import ansible.utils.template
from ansible import errors
from ansible import callbacks
from ansible import utils
from ansible.color import ANSIBLE_COLOR, stringc
from ansible.callbacks import display

def colorize(lead, num, color):
    """ Print 'lead' = 'num' in 'color' """
    if num != 0 and ANSIBLE_COLOR and color is not None:
        return "%s%s%-15s" % (stringc(lead, color), stringc("=", color), stringc(str(num), color))
    else:
        return "%s=%-4s" % (lead, str(num))

def hostcolor(host, stats, color=True):
    if ANSIBLE_COLOR and color:
        if stats['failures'] != 0 or stats['unreachable'] != 0:
            return "%-37s" % stringc(host, 'red')
        elif stats['changed'] != 0:
            return "%-37s" % stringc(host, 'yellow')
        else:
            return "%-37s" % stringc(host, 'green')
    return "%-26s" % host


def main(args):
    ''' run ansible-playbook operations '''

    # create parser for CLI options
    parser = utils.base_parser(
        constants=C,
        usage = "%prog playbook.yml",
        connect_opts=True,
        runas_opts=True,
        subset_opts=True,
        check_opts=True,
        diff_opts=True
    )
    #parser.add_option('--vault-password', dest="vault_password",
    #    help="password for vault encrypted files")
    parser.add_option('-e', '--extra-vars', dest="extra_vars", action="append",
        help="set additional variables as key=value or YAML/JSON", default=[])
    parser.add_option('-t', '--tags', dest='tags', default='all',
        help="only run plays and tasks tagged with these values")
    parser.add_option('--skip-tags', dest='skip_tags',
        help="only run plays and tasks whose tags do not match these values")
    parser.add_option('--syntax-check', dest='syntax', action='store_true',
        help="perform a syntax check on the playbook, but do not execute it")
    parser.add_option('--list-tasks', dest='listtasks', action='store_true',
        help="list all tasks that would be executed")
    parser.add_option('--step', dest='step', action='store_true',
        help="one-step-at-a-time: confirm each task before running")
    parser.add_option('--start-at-task', dest='start_at',
        help="start the playbook at the task matching this name")
    parser.add_option('--force-handlers', dest='force_handlers', action='store_true',
        help="run handlers even if a task fails")

    options, args = parser.parse_args(args)

    if len(args) == 0:
        parser.print_help(file=sys.stderr)
        return 1

    # su and sudo command line arguments need to be mutually exclusive
    if (options.su or options.su_user or options.ask_su_pass) and \
                (options.sudo or options.sudo_user or options.ask_sudo_pass):
            parser.error("Sudo arguments ('--sudo', '--sudo-user', and '--ask-sudo-pass') "
                         "and su arguments ('-su', '--su-user', and '--ask-su-pass') are "
                         "mutually exclusive")

    if (options.ask_vault_pass and options.vault_password_file):
            parser.error("--ask-vault-pass and --vault-password-file are mutually exclusive")

    sshpass = None
    sudopass = None
    su_pass = None
    vault_pass = None

    if not options.listhosts and not options.syntax and not options.listtasks:
        options.ask_pass = options.ask_pass or C.DEFAULT_ASK_PASS
        options.ask_vault_pass = options.ask_vault_pass or C.DEFAULT_ASK_VAULT_PASS
        # Never ask for an SSH password when we run with local connection
        if options.connection == "local":
            options.ask_pass = False
        options.ask_sudo_pass = options.ask_sudo_pass or C.DEFAULT_ASK_SUDO_PASS
        options.ask_su_pass = options.ask_su_pass or C.DEFAULT_ASK_SU_PASS
        options.ask_vault_pass = options.ask_vault_pass or C.DEFAULT_ASK_VAULT_PASS
        (sshpass, sudopass, su_pass, vault_pass) = utils.ask_passwords(ask_pass=options.ask_pass, ask_sudo_pass=options.ask_sudo_pass, ask_su_pass=options.ask_su_pass, ask_vault_pass=options.ask_vault_pass)
        options.sudo_user = options.sudo_user or C.DEFAULT_SUDO_USER
        options.su_user = options.su_user or C.DEFAULT_SU_USER

        if options.vault_password_file:
            this_path = os.path.expanduser(options.vault_password_file)
            try:
                f = open(this_path, "rb")
                tmp_vault_pass=f.read().strip()
                f.close()
            except (OSError, IOError), e:
                raise errors.AnsibleError("Could not read %s: %s" % (this_path, e))

            if not options.ask_vault_pass:
                vault_pass = tmp_vault_pass

    extra_vars = {}
    for extra_vars_opt in options.extra_vars:
        if extra_vars_opt.startswith("@"):
            # Argument is a YAML file (JSON is a subset of YAML)
            extra_vars = utils.combine_vars(extra_vars, utils.parse_yaml_from_file(extra_vars_opt[1:]))
        elif extra_vars_opt and extra_vars_opt[0] in '[{':
            # Arguments as YAML
            extra_vars = utils.combine_vars(extra_vars, utils.parse_yaml(extra_vars_opt))
        else:
            # Arguments as Key-value
            extra_vars = utils.combine_vars(extra_vars, utils.parse_kv(extra_vars_opt))

    only_tags = options.tags.split(",")
    skip_tags = options.skip_tags
    if options.skip_tags is not None:
        skip_tags = options.skip_tags.split(",")

    for playbook in args:
        if not os.path.exists(playbook):
            raise errors.AnsibleError("the playbook: %s could not be found" % playbook)
        if not (os.path.isfile(playbook) or stat.S_ISFIFO(os.stat(playbook).st_mode)):
            raise errors.AnsibleError("the playbook: %s does not appear to be a file" % playbook)

    inventory = ansible.inventory.Inventory(options.inventory, vault_password=vault_pass)
    inventory.subset(options.subset)
    if len(inventory.list_hosts()) == 0:
        raise errors.AnsibleError("provided hosts list is empty")

    # run all playbooks specified on the command line
    for playbook in args:

        # let inventory know which playbooks are using so it can know the basedirs
        inventory.set_playbook_basedir(os.path.dirname(playbook))

        stats = callbacks.AggregateStats()
        playbook_cb = callbacks.PlaybookCallbacks(verbose=utils.VERBOSITY)
        if options.step:
            playbook_cb.step = options.step
        if options.start_at:
            playbook_cb.start_at = options.start_at
        runner_cb = callbacks.PlaybookRunnerCallbacks(stats, verbose=utils.VERBOSITY)

        pb = ansible.playbook.PlayBook(
            playbook=playbook,
            module_path=options.module_path,
            inventory=inventory,
            forks=options.forks,
            remote_user=options.remote_user,
            remote_pass=sshpass,
            callbacks=playbook_cb,
            runner_callbacks=runner_cb,
            stats=stats,
            timeout=options.timeout,
            transport=options.connection,
            sudo=options.sudo,
            sudo_user=options.sudo_user,
            sudo_pass=sudopass,
            extra_vars=extra_vars,
            private_key_file=options.private_key_file,
            only_tags=only_tags,
            skip_tags=skip_tags,
            check=options.check,
            diff=options.diff,
            su=options.su,
            su_pass=su_pass,
            su_user=options.su_user,
            vault_password=vault_pass,
            force_handlers=options.force_handlers
        )

        if options.listhosts or options.listtasks or options.syntax:
            print ''
            print 'playbook: %s' % playbook
            print ''
            playnum = 0
            for (play_ds, play_basedir) in zip(pb.playbook, pb.play_basedirs):
                playnum += 1
                play = ansible.playbook.Play(pb, play_ds, play_basedir)
                label = play.name
                hosts = pb.inventory.list_hosts(play.hosts)
                if options.listhosts:
                    print '  play #%d (%s): host count=%d' % (playnum, label, len(hosts))
                    for host in hosts:
                        print '    %s' % host
                if options.listtasks:
                    if options.subset and not hosts:
                        continue
                    matched_tags, unmatched_tags = play.compare_tags(pb.only_tags)

                    # Remove skipped tasks
                    matched_tags = matched_tags - set(pb.skip_tags)

                    unmatched_tags.discard('all')
                    unknown_tags = ((set(pb.only_tags) | set(pb.skip_tags)) -
                                    (matched_tags | unmatched_tags))

                    if unknown_tags:
                        continue
                    print '  play #%d (%s):' % (playnum, label)

                    for task in play.tasks():
                        if (set(task.tags).intersection(pb.only_tags) and not
                            set(task.tags).intersection(pb.skip_tags)):
                            if getattr(task, 'name', None) is not None:
                                # meta tasks have no names
                                print '    %s' % task.name
                print ''
            continue

        if options.syntax:
            # if we've not exited by now then we are fine.
            print 'Playbook Syntax is fine'
            return 0

        failed_hosts = []
        unreachable_hosts = []

        try:

            pb.run()

            hosts = sorted(pb.stats.processed.keys())
            display(callbacks.banner("PLAY RECAP"))
            playbook_cb.on_stats(pb.stats)

            for h in hosts:
                t = pb.stats.summarize(h)
                if t['failures'] > 0:
                    failed_hosts.append(h)
                if t['unreachable'] > 0:
                    unreachable_hosts.append(h)

            retries = failed_hosts + unreachable_hosts

            if len(retries) > 0:
                filename = pb.generate_retry_inventory(retries)
                if filename:
                    display("           to retry, use: --limit @%s\n" % filename)

            for h in hosts:
                t = pb.stats.summarize(h)

                display("%s : %s %s %s %s" % (
                    hostcolor(h, t),
                    colorize('ok', t['ok'], 'green'),
                    colorize('changed', t['changed'], 'yellow'),
                    colorize('unreachable', t['unreachable'], 'red'),
                    colorize('failed', t['failures'], 'red')),
                    screen_only=True
                )

                display("%s : %s %s %s %s" % (
                    hostcolor(h, t, False),
                    colorize('ok', t['ok'], None),
                    colorize('changed', t['changed'], None),
                    colorize('unreachable', t['unreachable'], None),
                    colorize('failed', t['failures'], None)),
                    log_only=True
                )


            print ""
            if len(failed_hosts) > 0:
                return 2
            if len(unreachable_hosts) > 0:
                return 3

        except errors.AnsibleError, e:
            display("ERROR: %s" % e, color='red')
            return 1

    return 0


if __name__ == "__main__":
    display(" ", log_only=True)
    display(" ".join(sys.argv), log_only=True)
    display(" ", log_only=True)
    try:
        sys.exit(main(sys.argv[1:]))
    except errors.AnsibleError, e:
        display("ERROR: %s" % e, color='red', stderr=True)
        sys.exit(1)
    except KeyboardInterrupt, ke:
        display("ERROR: interrupted", color='red', stderr=True)
        sys.exit(1)