# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
# (c) 2013, Dylan Martin <dmartin@seattlecentral.edu>
#
# 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/>.
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

import os

from ansible.errors import AnsibleError, AnsibleAction, AnsibleActionFail, AnsibleActionSkip
from ansible.module_utils._text import to_text
from ansible.module_utils.parsing.convert_bool import boolean
from ansible.plugins.action import ActionBase


class ActionModule(ActionBase):

    TRANSFERS_FILES = True

    def run(self, tmp=None, task_vars=None):
        ''' handler for unarchive operations '''
        if task_vars is None:
            task_vars = dict()

        result = super(ActionModule, self).run(tmp, task_vars)
        del tmp  # tmp no longer has any effect

        source = self._task.args.get('src', None)
        dest = self._task.args.get('dest', None)
        remote_src = boolean(self._task.args.get('remote_src', False), strict=False)
        creates = self._task.args.get('creates', None)
        decrypt = self._task.args.get('decrypt', True)

        try:
            # "copy" is deprecated in favor of "remote_src".
            if 'copy' in self._task.args:
                # They are mutually exclusive.
                if 'remote_src' in self._task.args:
                    raise AnsibleActionFail("parameters are mutually exclusive: ('copy', 'remote_src')")
                # We will take the information from copy and store it in
                # the remote_src var to use later in this file.
                self._task.args['remote_src'] = remote_src = not boolean(self._task.args.pop('copy'), strict=False)

            if source is None or dest is None:
                raise AnsibleActionFail("src (or content) and dest are required")

            if creates:
                # do not run the command if the line contains creates=filename
                # and the filename already exists. This allows idempotence
                # of command executions.
                creates = self._remote_expand_user(creates)
                if self._remote_file_exists(creates):
                    raise AnsibleActionSkip("skipped, since %s exists" % creates)

            dest = self._remote_expand_user(dest)  # CCTODO: Fix path for Windows hosts.
            source = os.path.expanduser(source)

            if not remote_src:
                try:
                    source = self._loader.get_real_file(self._find_needle('files', source), decrypt=decrypt)
                except AnsibleError as e:
                    raise AnsibleActionFail(to_text(e))

            try:
                remote_stat = self._execute_remote_stat(dest, all_vars=task_vars, follow=True)
            except AnsibleError as e:
                raise AnsibleActionFail(to_text(e))

            if not remote_stat['exists'] or not remote_stat['isdir']:
                raise AnsibleActionFail("dest '%s' must be an existing dir" % dest)

            if not remote_src:
                # transfer the file to a remote tmp location
                tmp_src = self._connection._shell.join_path(self._connection._shell.tmpdir, 'source')
                self._transfer_file(source, tmp_src)

            # handle diff mode client side
            # handle check mode client side

            # remove action plugin only keys
            new_module_args = self._task.args.copy()
            for key in ('decrypt',):
                if key in new_module_args:
                    del new_module_args[key]

            if not remote_src:
                # fix file permissions when the copy is done as a different user
                self._fixup_perms2((self._connection._shell.tmpdir, tmp_src))
                new_module_args['src'] = tmp_src

            # execute the unarchive module now, with the updated args
            result.update(self._execute_module(module_args=new_module_args, task_vars=task_vars))
        except AnsibleAction as e:
            result.update(e.result)
        finally:
            self._remove_tmp_path(self._connection._shell.tmpdir)
        return result
