# (c) 2012-2014, 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/>.

# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

from ansible import constants as C
from ansible.plugins.callback import CallbackBase
from ansible.utils.color import colorize, hostcolor

class CallbackModule(CallbackBase):

    '''
    This is the default callback interface, which simply prints messages
    to stdout when new callback events are received.
    '''

    CALLBACK_VERSION = 2.0
    CALLBACK_TYPE = 'stdout'
    CALLBACK_NAME = 'default'

    def __init__(self):

        self._play = None
        self._last_task_banner = None
        super(CallbackModule, self).__init__()

    def v2_runner_on_failed(self, result, ignore_errors=False):

        if self._play.strategy == 'free' and self._last_task_banner != result._task._uuid:
            self._print_task_banner(result._task)

        delegated_vars = result._result.get('_ansible_delegated_vars', None)
        if 'exception' in result._result:
            if self._display.verbosity < 3:
                # extract just the actual error message from the exception text
                error = result._result['exception'].strip().split('\n')[-1]
                msg = "An exception occurred during task execution. To see the full traceback, use -vvv. The error was: %s" % error
            else:
                msg = "An exception occurred during task execution. The full traceback is:\n" + result._result['exception']

            self._display.display(msg, color=C.COLOR_ERROR)

        if result._task.loop and 'results' in result._result:
            self._process_items(result)

        else:
            if delegated_vars:
                self._display.display("fatal: [%s -> %s]: FAILED! => %s" % (result._host.get_name(), delegated_vars['ansible_host'], self._dump_results(result._result)), color=C.COLOR_ERROR)
            else:
                self._display.display("fatal: [%s]: FAILED! => %s" % (result._host.get_name(), self._dump_results(result._result)), color=C.COLOR_ERROR)

        if result._task.ignore_errors:
            self._display.display("...ignoring", color=C.COLOR_SKIP)

    def v2_runner_on_ok(self, result):

        if self._play.strategy == 'free' and self._last_task_banner != result._task._uuid:
            self._print_task_banner(result._task)

        self._clean_results(result._result, result._task.action)

        delegated_vars = result._result.get('_ansible_delegated_vars', None)
        self._clean_results(result._result, result._task.action)
        if result._task.action in ('include', 'include_role'):
            return
        elif result._result.get('changed', False):
            if delegated_vars:
                msg = "changed: [%s -> %s]" % (result._host.get_name(), delegated_vars['ansible_host'])
            else:
                msg = "changed: [%s]" % result._host.get_name()
            color = C.COLOR_CHANGED
        else:
            if delegated_vars:
                msg = "ok: [%s -> %s]" % (result._host.get_name(), delegated_vars['ansible_host'])
            else:
                msg = "ok: [%s]" % result._host.get_name()
            color = C.COLOR_OK

        if result._task.loop and 'results' in result._result:
            self._process_items(result)
        else:

            if (self._display.verbosity > 0 or '_ansible_verbose_always' in result._result) and not '_ansible_verbose_override' in result._result:
                msg += " => %s" % (self._dump_results(result._result),)
            self._display.display(msg, color=color)

        self._handle_warnings(result._result)

    def v2_runner_on_skipped(self, result):
        if C.DISPLAY_SKIPPED_HOSTS:
            if self._play.strategy == 'free' and self._last_task_banner != result._task._uuid:
                self._print_task_banner(result._task)

            if result._task.loop and 'results' in result._result:
                self._process_items(result)
            else:
                msg = "skipping: [%s]" % result._host.get_name()
                if (self._display.verbosity > 0 or '_ansible_verbose_always' in result._result) and not '_ansible_verbose_override' in result._result:
                    msg += " => %s" % self._dump_results(result._result)
                self._display.display(msg, color=C.COLOR_SKIP)

    def v2_runner_on_unreachable(self, result):
        if self._play.strategy == 'free' and self._last_task_banner != result._task._uuid:
            self._print_task_banner(result._task)

        delegated_vars = result._result.get('_ansible_delegated_vars', None)
        if delegated_vars:
            self._display.display("fatal: [%s -> %s]: UNREACHABLE! => %s" % (result._host.get_name(), delegated_vars['ansible_host'], self._dump_results(result._result)), color=C.COLOR_UNREACHABLE)
        else:
            self._display.display("fatal: [%s]: UNREACHABLE! => %s" % (result._host.get_name(), self._dump_results(result._result)), color=C.COLOR_UNREACHABLE)

    def v2_playbook_on_no_hosts_matched(self):
        self._display.display("skipping: no hosts matched", color=C.COLOR_SKIP)

    def v2_playbook_on_no_hosts_remaining(self):
        self._display.banner("NO MORE HOSTS LEFT")

    def v2_playbook_on_task_start(self, task, is_conditional):

        if self._play.strategy != 'free':
            self._print_task_banner(task)

    def _print_task_banner(self, task):
        # args can be specified as no_log in several places: in the task or in
        # the argument spec.  We can check whether the task is no_log but the
        # argument spec can't be because that is only run on the target
        # machine and we haven't run it thereyet at this time.
        #
        # So we give people a config option to affect display of the args so
        # that they can secure this if they feel that their stdout is insecure
        # (shoulder surfing, logging stdout straight to a file, etc).
        args = ''
        if not task.no_log and C.DISPLAY_ARGS_TO_STDOUT:
            args = u', '.join(u'%s=%s' % a for a in task.args.items())
            args = u' %s' % args

        self._display.banner(u"TASK [%s%s]" % (task.get_name().strip(), args))
        if self._display.verbosity >= 2:
            path = task.get_path()
            if path:
                self._display.display(u"task path: %s" % path, color=C.COLOR_DEBUG)

        self._last_task_banner = task._uuid

    def v2_playbook_on_cleanup_task_start(self, task):
        self._display.banner("CLEANUP TASK [%s]" % task.get_name().strip())

    def v2_playbook_on_handler_task_start(self, task):
        self._display.banner("RUNNING HANDLER [%s]" % task.get_name().strip())

    def v2_playbook_on_play_start(self, play):
        name = play.get_name().strip()
        if not name:
            msg = u"PLAY"
        else:
            msg = u"PLAY [%s]" % name

        self._play = play

        self._display.banner(msg)

    def v2_on_file_diff(self, result):
        if result._task.loop and 'results' in result._result:
            for res in result._result['results']:
                if 'diff' in res and res['diff'] and res.get('changed', False):
                    diff = self._get_diff(res['diff'])
                    if diff:
                        self._display.display(diff)
        elif 'diff' in result._result and result._result['diff'] and result._result.get('changed', False):
            diff = self._get_diff(result._result['diff'])
            if diff:
                self._display.display(diff)

    def v2_runner_item_on_ok(self, result):
        delegated_vars = result._result.get('_ansible_delegated_vars', None)
        if result._task.action in ('include', 'include_role'):
            return
        elif result._result.get('changed', False):
            msg = 'changed'
            color = C.COLOR_CHANGED
        else:
            msg = 'ok'
            color = C.COLOR_OK

        if delegated_vars:
            msg += ": [%s -> %s]" % (result._host.get_name(), delegated_vars['ansible_host'])
        else:
            msg += ": [%s]" % result._host.get_name()

        msg += " => (item=%s)" % (self._get_item(result._result),)

        if (self._display.verbosity > 0 or '_ansible_verbose_always' in result._result) and not '_ansible_verbose_override' in result._result:
            msg += " => %s" % self._dump_results(result._result)
        self._display.display(msg, color=color)

    def v2_runner_item_on_failed(self, result):
        delegated_vars = result._result.get('_ansible_delegated_vars', None)
        if 'exception' in result._result:
            if self._display.verbosity < 3:
                # extract just the actual error message from the exception text
                error = result._result['exception'].strip().split('\n')[-1]
                msg = "An exception occurred during task execution. To see the full traceback, use -vvv. The error was: %s" % error
            else:
                msg = "An exception occurred during task execution. The full traceback is:\n" + result._result['exception']

            self._display.display(msg, color=C.COLOR_ERROR)

        msg = "failed: "
        if delegated_vars:
            msg += "[%s -> %s]" % (result._host.get_name(), delegated_vars['ansible_host'])
        else:
            msg += "[%s]" % (result._host.get_name())

        self._display.display(msg + " (item=%s) => %s" % (self._get_item(result._result), self._dump_results(result._result)), color=C.COLOR_ERROR)
        self._handle_warnings(result._result)

    def v2_runner_item_on_skipped(self, result):
        if C.DISPLAY_SKIPPED_HOSTS:
            msg = "skipping: [%s] => (item=%s) " % (result._host.get_name(), self._get_item(result._result))
            if (self._display.verbosity > 0 or '_ansible_verbose_always' in result._result) and not '_ansible_verbose_override' in result._result:
                msg += " => %s" % self._dump_results(result._result)
            self._display.display(msg, color=C.COLOR_SKIP)

    def v2_playbook_on_include(self, included_file):
        msg = 'included: %s for %s' % (included_file._filename, ", ".join([h.name for h in included_file._hosts]))
        self._display.display(msg, color=C.COLOR_SKIP)

    def v2_playbook_on_stats(self, stats):
        self._display.banner("PLAY RECAP")

        hosts = sorted(stats.processed.keys())
        for h in hosts:
            t = stats.summarize(h)

            self._display.display(u"%s : %s %s %s %s" % (
                hostcolor(h, t),
                colorize(u'ok', t['ok'], C.COLOR_OK),
                colorize(u'changed', t['changed'], C.COLOR_CHANGED),
                colorize(u'unreachable', t['unreachable'], C.COLOR_UNREACHABLE),
                colorize(u'failed', t['failures'], C.COLOR_ERROR)),
                screen_only=True
            )

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

        self._display.display("", screen_only=True)

    def v2_playbook_on_start(self, playbook):
        if self._display.verbosity > 1:
            from os.path import basename
            self._display.banner("PLAYBOOK: %s" % basename(playbook._file_name))

        if self._display.verbosity > 3:
            if self._options is not None:
                for option in dir(self._options):
                    if option.startswith('_') or option in ['read_file', 'ensure_value', 'read_module']:
                        continue
                    val =  getattr(self._options,option)
                    if val:
                        self._display.vvvv('%s: %s' % (option,val))

    def v2_runner_retry(self, result):
        msg = "FAILED - RETRYING: %s (%d retries left)." % (result._task, result._result['retries'] - result._result['attempts'])
        if (self._display.verbosity > 2 or '_ansible_verbose_always' in result._result) and not '_ansible_verbose_override' in result._result:
            msg += "Result was: %s" % self._dump_results(result._result)
        self._display.display(msg, color=C.COLOR_DEBUG)
