# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011, 2012 MediaGoblin contributors.  See AUTHORS.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from mediagoblin import messages
import mediagoblin.mg_globals as mg_globals

import logging

_log = logging.getLogger(__name__)


from mediagoblin.tools.translate import pass_to_ugettext as _
from mediagoblin.tools.response import render_to_response, redirect
from mediagoblin.decorators import require_active_login, user_has_privilege
from mediagoblin.submit import forms as submit_forms
from mediagoblin.messages import add_message, SUCCESS
from mediagoblin.media_types import \
    InvalidFileType, FileTypeNotSupported
from mediagoblin.submit.lib import \
    check_file_field, submit_media, get_upload_file_limits, \
    FileUploadLimit, UserUploadLimit, UserPastUploadLimit


@require_active_login
@user_has_privilege(u'uploader')
def submit_start(request):
    """
    First view for submitting a file.
    """
    upload_limit, max_file_size = get_upload_file_limits(request.user)

    submit_form = submit_forms.get_submit_start_form(
        request.form,
        license=request.user.license_preference,
        max_file_size=max_file_size,
        upload_limit=upload_limit,
        uploaded=request.user.uploaded)

    if request.method == 'POST' and submit_form.validate():
        if not check_file_field(request, 'file'):
            submit_form.file.errors.append(
                _(u'You must provide a file.'))
        else:
            try:
                submit_media(
                    mg_app=request.app, user=request.user,
                    submitted_file=request.files['file'],
                    filename=request.files['file'].filename,
                    title=unicode(submit_form.title.data),
                    description=unicode(submit_form.description.data),
                    license=unicode(submit_form.license.data) or None,
                    tags_string=submit_form.tags.data,
                    upload_limit=upload_limit, max_file_size=max_file_size)

                add_message(request, SUCCESS, _('Woohoo! Submitted!'))

                return redirect(request, "mediagoblin.user_pages.user_home",
                            user=request.user.username)


            # Handle upload limit issues
            except FileUploadLimit:
                submit_form.file.errors.append(
                    _(u'Sorry, the file size is too big.'))
            except UserUploadLimit:
                submit_form.file.errors.append(
                    _('Sorry, uploading this file will put you over your'
                      ' upload limit.'))
            except UserPastUploadLimit:
                messages.add_message(
                    request,
                    messages.WARNING,
                    _('Sorry, you have reached your upload limit.'))
                return redirect(request, "mediagoblin.user_pages.user_home",
                                user=request.user.username)

            except Exception as e:
                '''
                This section is intended to catch exceptions raised in
                mediagoblin.media_types
                '''
                if isinstance(e, InvalidFileType) or \
                        isinstance(e, FileTypeNotSupported):
                    submit_form.file.errors.append(
                        e)
                else:
                    raise

    return render_to_response(
        request,
        'mediagoblin/submit/start.html',
        {'submit_form': submit_form,
         'app_config': mg_globals.app_config})


@require_active_login
def add_collection(request, media=None):
    """
    View to create a new collection
    """
    submit_form = submit_forms.AddCollectionForm(request.form)

    if request.method == 'POST' and submit_form.validate():
        collection = request.db.Collection()

        collection.title = unicode(submit_form.title.data)
        collection.description = unicode(submit_form.description.data)
        collection.creator = request.user.id
        collection.generate_slug()

        # Make sure this user isn't duplicating an existing collection
        existing_collection = request.db.Collection.query.filter_by(
                creator=request.user.id,
                title=collection.title).first()

        if existing_collection:
            add_message(request, messages.ERROR,
                _('You already have a collection called "%s"!') \
                    % collection.title)
        else:
            collection.save()

            add_message(request, SUCCESS,
                _('Collection "%s" added!') % collection.title)

        return redirect(request, "mediagoblin.user_pages.user_home",
                        user=request.user.username)

    return render_to_response(
        request,
        'mediagoblin/submit/collection.html',
        {'submit_form': submit_form,
         'app_config': mg_globals.app_config})