# Copyright (C) 2017-2018  The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information

import os
import logging

from swh.core.config import SWHConfig
from swh.scheduler import get_scheduler

# IRIs (Internationalized Resource identifier) sword 2.0 specified
EDIT_SE_IRI = 'edit_se_iri'
EM_IRI = 'em_iri'
CONT_FILE_IRI = 'cont_file_iri'
SD_IRI = 'servicedocument'
COL_IRI = 'upload'
STATE_IRI = 'state_iri'
PRIVATE_GET_RAW_CONTENT = 'private-download'
PRIVATE_CHECK_DEPOSIT = 'check-deposit'
PRIVATE_PUT_DEPOSIT = 'private-update'
PRIVATE_GET_DEPOSIT_METADATA = 'private-read'
PRIVATE_LIST_DEPOSITS = 'private-deposit-list'

ARCHIVE_KEY = 'archive'
METADATA_KEY = 'metadata'
RAW_METADATA_KEY = 'raw-metadata'

ARCHIVE_TYPE = 'archive'
METADATA_TYPE = 'metadata'


AUTHORIZED_PLATFORMS = ['development', 'production', 'testing']

DEPOSIT_STATUS_REJECTED = 'rejected'
DEPOSIT_STATUS_PARTIAL = 'partial'
DEPOSIT_STATUS_DEPOSITED = 'deposited'
DEPOSIT_STATUS_VERIFIED = 'verified'
DEPOSIT_STATUS_LOAD_SUCCESS = 'done'
DEPOSIT_STATUS_LOAD_FAILURE = 'failed'

# Revision author for deposit
SWH_PERSON = {
    'name': 'Software Heritage',
    'fullname': 'Software Heritage',
    'email': 'robot@softwareheritage.org'
}


def setup_django_for(platform=None, config_file=None):
    """Setup function for command line tools (swh.deposit.create_user) to
       initialize the needed db access.

    Note:
        Do not import any django related module prior to this function
        call. Otherwise, this will raise an
        django.core.exceptions.ImproperlyConfigured error message.

    Args:
        platform (str): the platform the scheduling is running
        config_file (str): Extra configuration file (typically for the
                           production platform)

    Raises:
        ValueError in case of wrong platform inputs.

    """
    if platform is not None:
        if platform not in AUTHORIZED_PLATFORMS:
            raise ValueError('Platform should be one of %s' %
                             AUTHORIZED_PLATFORMS)
        if 'DJANGO_SETTINGS_MODULE' not in os.environ:
            os.environ['DJANGO_SETTINGS_MODULE'] = (
                'swh.deposit.settings.%s' % platform)

    if config_file:
        os.environ.setdefault('SWH_CONFIG_FILENAME', config_file)

    import django
    django.setup()


class SWHDefaultConfig(SWHConfig):
    """Mixin intended to enrich views with SWH configuration.

    """
    CONFIG_BASE_FILENAME = 'deposit/server'

    DEFAULT_CONFIG = {
        'max_upload_size': ('int', 209715200),
        'checks': ('bool', True),
        'scheduler': ('dict', {
            'cls': 'remote',
            'args': {
                'url': 'http://localhost:5008/'
            }
        })
    }

    ADDITIONAL_CONFIG = {}

    def __init__(self, **config):
        super().__init__()
        self.config = self.parse_config_file(
            additional_configs=[self.ADDITIONAL_CONFIG])
        self.config.update(config)
        self.log = logging.getLogger('swh.deposit')
        if self.config['checks']:
            self.scheduler = get_scheduler(**self.config['scheduler'])