# Copyright (c) 2017–2018 crocoite contributors
# 
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# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# THE SOFTWARE.

"""
Celery distributed tasks
"""

import os

from urllib.parse import urlsplit
from datetime import datetime

from celery import Celery
from celery.utils.log import get_task_logger

from .controller import SinglePageController, ControllerSettings
from . import behavior

app = Celery ('crocoite.distributed')
app.config_from_object('celeryconfig')
logger = get_task_logger('crocoite.distributed.archive')

@app.task(bind=True, track_started=True)
def archive (self, url, settings, enabledBehaviorNames):
    """
    Archive a single URL

    Supports these config keys (celeryconfig):

    warc_filename = '{domain}-{date}-{id}.warc.gz'
    temp_dir = '/tmp/'
    finished_dir = '/tmp/finished'
    """

    parsedUrl = urlsplit (url)
    outFile = app.conf.warc_filename.format (
                    id=self.request.id,
                    domain=parsedUrl.hostname.replace ('/', '-'),
                    date=datetime.utcnow ().isoformat (),
                    )
    outPath = os.path.join (app.conf.temp_dir, outFile)
    fd = open (outPath, 'wb')

    enabledBehavior = list (filter (lambda x: x.name in enabledBehaviorNames, behavior.available))
    settings = ControllerSettings (**settings)
    controller = SinglePageController (url, fd, behavior=enabledBehavior, settings=settings)
    ret = controller.run ()

    os.makedirs (app.conf.finished_dir, exist_ok=True)
    outPath = os.path.join (app.conf.finished_dir, outFile)
    os.rename (fd.name, outPath)

    return ret