#!/usr/bin/env python
#/opt/local/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python

#export PYTHONPATH=/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages

import os
import sys
import subprocess

import ansible.constants as AC
import battleschool.constants as C

#before callbacks import
AC.DEFAULT_CALLBACK_PLUGIN_PATH = C.DEFAULT_CALLBACK_PLUGIN_PATH

import ansible.playbook
import ansible.utils.template
from ansible import callbacks
from ansible import errors
from ansible import utils
from ansible.callbacks import display

from battleschool.printing import *
from battleschool.source.git import Git
from battleschool.source.local import Local


#TODO: verify environment: macports, ansible

def getSourceHandlers():
    handlers = [Git, Local]
    # for name, obj in inspect.getmembers(sourcepkg):
    #     if inspect.ismodule(obj):
    #         package = obj.__dict__['__package__']
    #         if package is not None and package.startswith('battleschool.source'):
    #             for srcName, srcObj in inspect.getmembers(obj):
    #                 if inspect.isclass(srcObj) and srcName != 'Source':
    #                     print "Loading %s/%s" % (srcName, srcObj)
    #                     handlers.append(srcObj)
    return handlers


def main(args):

    battleschool_dir = "%s/.battleschool" % os.environ['HOME']

    AC.DEFAULT_HOST_LIST = C.DEFAULT_HOST_LIST
    AC.DEFAULT_SUDO_FLAGS = C.DEFAULT_SUDO_FLAGS

    # create parser for CLI options
    usage = "%prog"
    parser = utils.base_parser(
        constants=AC,
        usage=usage,
        connect_opts=True,
        runas_opts=False,
        subset_opts=True,
        check_opts=True,
        diff_opts=True,
        output_opts=True
    )
    parser.add_option('-e', '--extra-vars', dest="extra_vars", default=None,
                      help="set additional key=value variables from the CLI")
    parser.add_option('--tags', dest='tags', default='all',
                      help="only run plays and tasks tagged with these values")
    parser.add_option('--syntax-check', dest='syntax', action='store_true',
                      help="do a playbook syntax check on the playbook, do not execute the playbook")
    parser.add_option('--list-tasks', dest='listtasks', action='store_true',
                      help="do 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("-s", "--sudo", default=AC.DEFAULT_SUDO, action="store_true",
                      dest='sudo', help="run operations with sudo (nopasswd)")
    parser.add_option('--config-dir', dest='config_dir', default=None,
                      help="config directory for battleschool (default=%s)" % battleschool_dir)
    parser.add_option('-u', '--update-vcs', dest='update_vcs', default=False, action='store_true',
                      help="update playbooks from a version control system (vcs)")

    options, args = parser.parse_args(args)

    playbooks_to_run = [C.DEFAULT_PLAYBOOK]

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

    sshpass = None
    sudopass = None
    options.remote_user = AC.DEFAULT_REMOTE_USER
    if not options.listhosts and not options.syntax and not options.listtasks:
        options.ask_pass = AC.DEFAULT_ASK_PASS
        options.ask_sudo_pass = options.ask_sudo_pass or AC.DEFAULT_ASK_SUDO_PASS
        ( sshpass, sudopass ) = utils.ask_passwords(ask_pass=options.ask_pass, ask_sudo_pass=options.ask_sudo_pass)
        # if options.sudo_user or options.ask_sudo_pass:
        #     options.sudo = True
        options.sudo_user = AC.DEFAULT_SUDO_USER
    if options.extra_vars and options.extra_vars[0] in '[{':
        extra_vars = utils.json_loads(options.extra_vars)
    else:
        extra_vars = utils.parse_kv(options.extra_vars)
    only_tags = options.tags.split(",")

    if options.config_dir:
        battleschool_dir = options.config_dir
    else:
        options.config_dir = battleschool_dir

    config_data = utils.parse_yaml_from_file("%s/config.yml" % battleschool_dir)
    options.cache_dir = "%s/cache" % battleschool_dir

    output = subprocess.check_output(["/usr/bin/sw_vers", "-productVersion"])
    mac_version = output.split()[-1].split(".")

    if extra_vars is None:
        extra_vars = dict()

    extra_vars['battleschool_config_dir'] = battleschool_dir
    extra_vars['battleschool_cache_dir'] = options.cache_dir
    extra_vars['mac_version'] = mac_version
    extra_vars['mac_major_minor_version'] = "%s.%s" % (mac_version[0], mac_version[1])

    handlers = getSourceHandlers()

    if options.module_path is None:
        options.module_path = AC.DEFAULT_MODULE_PATH

    if C.DEFAULT_MODULE_PATH not in options.module_path:
        options.module_path = "%s:%s" % (C.DEFAULT_MODULE_PATH, options.module_path)

    if 'sources' in config_data:
        display(banner("Updating sources"))
        sources = config_data['sources']

        for handler in handlers:
            source = handler(options, sources)
            playbooks = source.run(inventory, sshpass, sudopass)
            for playbook in playbooks:
                playbooks_to_run.append(playbook)

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


    # run all playbooks specified on the command line
    for playbook in playbooks_to_run:
        stats = callbacks.AggregateStats()

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

        runner_cb = BattleschoolRunnerCallbacks()
        playbook_cb = BattleschoolCallbacks()

        if options.step:
            playbook_cb.step = options.step

        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,
            check=options.check,
            diff=options.diff
        )

        if options.listhosts or options.listtasks:
            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
                if options.listhosts:
                    hosts = pb.inventory.list_hosts(play.hosts)
                    print '  play #%d (%s): host count=%d' % (playnum, label, len(hosts))
                    for host in hosts:
                        print '    %s' % host
                if options.listtasks:
                    matched_tags, unmatched_tags = play.compare_tags(pb.only_tags)
                    unmatched_tags.discard('all')
                    unknown_tags = set(pb.only_tags) - (matched_tags | unmatched_tags)
                    if unknown_tags:
                        continue
                    print '  play #%d (%s): task count=%d' % (playnum, label, len(play.tasks()))
                    for task in play.tasks():
                        if set(task.tags).intersection(pb.only_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 = []

        try:

            pb.run()

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

            for host in hosts:
                smry = pb.stats.summarize(host)
                if smry['unreachable'] > 0 or smry['failures'] > 0:
                    failed_hosts.append(host)

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

            for host in hosts:
                smry = pb.stats.summarize(host)
                print_stats(host, smry)

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

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

    display(banner("Battleschool completed"))
    # TODO: aggregate stats across playbook runs

if __name__ == '__main__':
    sys.exit(main(sys.argv[1:]))
