# (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 os
import shlex

import ansible.constants as C
from ansible.utils import template
from ansible import utils
from ansible import errors
from ansible.runner.return_data import ReturnData

class ActionModule(object):

    TRANSFERS_FILES = True

    def __init__(self, runner):
        self.runner = runner

    def run(self, conn, tmp, module_name, module_args, inject, complex_args=None, **kwargs):
        ''' handler for file transfer operations '''

        if self.runner.noop_on_check(inject):
            # in check mode, always skip this module
            return ReturnData(conn=conn, comm_ok=True, result=dict(skipped=True, msg='check mode not supported for this module'))

        # Decode the result of shlex.split() to UTF8 to get around a bug in that's been fixed in Python 2.7 but not Python 2.6.
        # See: http://bugs.python.org/issue6988
        tokens  = shlex.split(module_args.encode('utf8'))
        tokens = [s.decode('utf8') for s in tokens]

        source  = tokens[0]
        # FIXME: error handling
        args    = " ".join(tokens[1:])
        source  = template.template(self.runner.basedir, source, inject)
        if '_original_file' in inject:
            source = utils.path_dwim_relative(inject['_original_file'], 'files', source, self.runner.basedir)
        else:
            source = utils.path_dwim(self.runner.basedir, source)

        # transfer the file to a remote tmp location
        source  = source.replace('\x00','') # why does this happen here?
        args    = args.replace('\x00','') # why does this happen here?
        tmp_src = os.path.join(tmp, os.path.basename(source))
        tmp_src = tmp_src.replace('\x00', '') 

        conn.put_file(source, tmp_src)

        sudoable=True
        # set file permissions, more permisive when the copy is done as a different user
        if self.runner.sudo and self.runner.sudo_user != 'root':
            cmd_args_chmod = "chmod a+rx %s" % tmp_src
            sudoable=False
        else:
            cmd_args_chmod = "chmod +rx %s" % tmp_src
        self.runner._low_level_exec_command(conn, cmd_args_chmod, tmp, sudoable=sudoable)

        # add preparation steps to one ssh roundtrip executing the script
        env_string = self.runner._compute_environment_string(inject)
        module_args = env_string + tmp_src + ' ' + args

        handler = utils.plugins.action_loader.get('raw', self.runner)
        result = handler.run(conn, tmp, 'raw', module_args, inject)

        # clean up after
        if tmp.find("tmp") != -1 and not C.DEFAULT_KEEP_REMOTE_FILES:
            self.runner._low_level_exec_command(conn, 'rm -rf %s >/dev/null 2>&1' % tmp, tmp)

        result.result['changed'] = True

        return result
