# (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

import os

import ansible.constants as C
from ansible.errors import AnsibleParserError, AnsibleAssertionError
from ansible.module_utils.six import iteritems, string_types
from ansible.parsing.splitter import split_args, parse_kv
from ansible.parsing.yaml.objects import AnsibleBaseYAMLObject, AnsibleMapping
from ansible.playbook.attribute import FieldAttribute
from ansible.playbook.base import Base
from ansible.playbook.conditional import Conditional
from ansible.playbook.taggable import Taggable
from ansible.template import Templar
from ansible.utils.display import Display

display = Display()


class PlaybookInclude(Base, Conditional, Taggable):

    _import_playbook = FieldAttribute(isa='string')
    _vars = FieldAttribute(isa='dict', default=dict)

    @staticmethod
    def load(data, basedir, variable_manager=None, loader=None):
        return PlaybookInclude().load_data(ds=data, basedir=basedir, variable_manager=variable_manager, loader=loader)

    def load_data(self, ds, basedir, variable_manager=None, loader=None):
        '''
        Overrides the base load_data(), as we're actually going to return a new
        Playbook() object rather than a PlaybookInclude object
        '''

        # import here to avoid a dependency loop
        from ansible.playbook import Playbook
        from ansible.playbook.play import Play

        # first, we use the original parent method to correctly load the object
        # via the load_data/preprocess_data system we normally use for other
        # playbook objects
        new_obj = super(PlaybookInclude, self).load_data(ds, variable_manager, loader)

        all_vars = self.vars.copy()
        if variable_manager:
            all_vars.update(variable_manager.get_vars())

        templar = Templar(loader=loader, variables=all_vars)

        # then we use the object to load a Playbook
        pb = Playbook(loader=loader)

        file_name = templar.template(new_obj.import_playbook)
        if not os.path.isabs(file_name):
            file_name = os.path.join(basedir, file_name)

        pb._load_playbook_data(file_name=file_name, variable_manager=variable_manager, vars=self.vars.copy())

        # finally, update each loaded playbook entry with any variables specified
        # on the included playbook and/or any tags which may have been set
        for entry in pb._entries:

            # conditional includes on a playbook need a marker to skip gathering
            if new_obj.when and isinstance(entry, Play):
                entry._included_conditional = new_obj.when[:]

            temp_vars = entry.vars.copy()
            temp_vars.update(new_obj.vars)
            param_tags = temp_vars.pop('tags', None)
            if param_tags is not None:
                entry.tags.extend(param_tags.split(','))
            entry.vars = temp_vars
            entry.tags = list(set(entry.tags).union(new_obj.tags))
            if entry._included_path is None:
                entry._included_path = os.path.dirname(file_name)

            # Check to see if we need to forward the conditionals on to the included
            # plays. If so, we can take a shortcut here and simply prepend them to
            # those attached to each block (if any)
            if new_obj.when:
                for task_block in (entry.pre_tasks + entry.roles + entry.tasks + entry.post_tasks):
                    task_block._attributes['when'] = new_obj.when[:] + task_block.when[:]

        return pb

    def preprocess_data(self, ds):
        '''
        Regorganizes the data for a PlaybookInclude datastructure to line
        up with what we expect the proper attributes to be
        '''

        if not isinstance(ds, dict):
            raise AnsibleAssertionError('ds (%s) should be a dict but was a %s' % (ds, type(ds)))

        # the new, cleaned datastructure, which will have legacy
        # items reduced to a standard structure
        new_ds = AnsibleMapping()
        if isinstance(ds, AnsibleBaseYAMLObject):
            new_ds.ansible_pos = ds.ansible_pos

        for (k, v) in iteritems(ds):
            if k in C._ACTION_ALL_IMPORT_PLAYBOOKS:
                self._preprocess_import(ds, new_ds, k, v)
            else:
                # some basic error checking, to make sure vars are properly
                # formatted and do not conflict with k=v parameters
                if k == 'vars':
                    if 'vars' in new_ds:
                        raise AnsibleParserError("import_playbook parameters cannot be mixed with 'vars' entries for import statements", obj=ds)
                    elif not isinstance(v, dict):
                        raise AnsibleParserError("vars for import_playbook statements must be specified as a dictionary", obj=ds)
                new_ds[k] = v

        return super(PlaybookInclude, self).preprocess_data(new_ds)

    def _preprocess_import(self, ds, new_ds, k, v):
        '''
        Splits the playbook import line up into filename and parameters
        '''

        if v is None:
            raise AnsibleParserError("playbook import parameter is missing", obj=ds)
        elif not isinstance(v, string_types):
            raise AnsibleParserError("playbook import parameter must be a string indicating a file path, got %s instead" % type(v), obj=ds)

        # The import_playbook line must include at least one item, which is the filename
        # to import. Anything after that should be regarded as a parameter to the import
        items = split_args(v)
        if len(items) == 0:
            raise AnsibleParserError("import_playbook statements must specify the file name to import", obj=ds)
        else:
            new_ds['import_playbook'] = items[0].strip()
            if len(items) > 1:
                display.warning('Additional parameters in import_playbook statements are not supported. This will be an error in version 2.14')
                # rejoin the parameter portion of the arguments and
                # then use parse_kv() to get a dict of params back
                params = parse_kv(" ".join(items[1:]))
                if 'tags' in params:
                    new_ds['tags'] = params.pop('tags')
                if 'vars' in new_ds:
                    raise AnsibleParserError("import_playbook parameters cannot be mixed with 'vars' entries for import statements", obj=ds)
                new_ds['vars'] = params
