import tempfile

from django.utils.translation import ugettext_lazy as _
from django.core.urlresolvers import reverse

from navigation.api import register_links, register_menu, \
    register_model_list_columns, register_multi_item_links
from common.utils import pretty_size
from common.conf import settings as common_settings
from main.api import register_diagnostic
from permissions.api import register_permissions

from models import Document, DocumentPage, DocumentPageTransformation
from staging import StagingFile
from conf.settings import ENABLE_SINGLE_DOCUMENT_UPLOAD

PERMISSION_DOCUMENT_CREATE = 'document_create'
PERMISSION_DOCUMENT_PROPERTIES_EDIT = 'document_properties_edit'
PERMISSION_DOCUMENT_EDIT = 'document_edit'
PERMISSION_DOCUMENT_METADATA_EDIT = 'document_metadata_edit'
PERMISSION_DOCUMENT_VIEW = 'document_view'
PERMISSION_DOCUMENT_DELETE = 'document_delete'
PERMISSION_DOCUMENT_DOWNLOAD = 'document_download'
PERMISSION_DOCUMENT_TRANSFORM = 'document_transform'
PERMISSION_DOCUMENT_TOOLS = 'document_tools'

register_permissions('documents', [
    {'name': PERMISSION_DOCUMENT_CREATE, 'label': _(u'Create document')},
    {'name': PERMISSION_DOCUMENT_PROPERTIES_EDIT, 'label': _(u'Edit document properties')},
    {'name': PERMISSION_DOCUMENT_EDIT, 'label': _(u'Edit document')},
    {'name': PERMISSION_DOCUMENT_METADATA_EDIT, 'label': _(u'Edit document metadata')},
    {'name': PERMISSION_DOCUMENT_VIEW, 'label': _(u'View document')},
    {'name': PERMISSION_DOCUMENT_DELETE, 'label': _(u'Delete document')},
    {'name': PERMISSION_DOCUMENT_DOWNLOAD, 'label': _(u'Download document')},
    {'name': PERMISSION_DOCUMENT_TRANSFORM, 'label': _(u'Transform document')},
    {'name': PERMISSION_DOCUMENT_TOOLS, 'label': _(u'Execute document modifying tools')},
])

document_list = {'text':  _(u'documents list'), 'view': 'document_list', 'famfam': 'page', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_list_recent = {'text':  _(u'recent documents list'), 'view': 'document_list_recent', 'famfam': 'page', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_create = {'text': _('upload a new document'), 'view': 'document_create', 'famfam': 'page_add', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_CREATE]}}
document_create_multiple = {'text': _('upload multiple new documents'), 'view': 'document_create_multiple', 'famfam': 'page_add', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_CREATE]}}
document_create_sibling = {'text': _('upload new document using same metadata'), 'view': 'document_create_sibling', 'args': 'object.id', 'famfam': 'page_copy', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_CREATE]}}
document_view = {'text': _('details (advanced)'), 'view': 'document_view', 'args': 'object.id', 'famfam': 'page', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_view_simple = {'text': _('details (simple)'), 'view': 'document_view_simple', 'args': 'object.id', 'famfam': 'page', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_delete = {'text': _('delete'), 'view': 'document_delete', 'args': 'object.id', 'famfam': 'page_delete', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_DELETE]}}
document_multiple_delete = {'text': _('delete'), 'view': 'document_multiple_delete', 'famfam': 'page_delete', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_DELETE]}}
document_edit = {'text': _('edit'), 'view': 'document_edit', 'args': 'object.id', 'famfam': 'page_edit', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_PROPERTIES_EDIT]}}
document_edit_metadata = {'text': _('edit metadata'), 'view': 'document_edit_metadata', 'args': 'object.id', 'famfam': 'page_edit', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_METADATA_EDIT]}}
document_multiple_edit_metadata = {'text': _('edit metadata'), 'view': 'document_multiple_edit_metadata', 'famfam': 'page_edit', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_METADATA_EDIT]}}
document_preview = {'text': _('preview'), 'class': 'fancybox', 'view': 'document_preview', 'args': 'object.id', 'famfam': 'magnifier', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_download = {'text': _('download'), 'view': 'document_download', 'args': 'object.id', 'famfam': 'page_save', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_DOWNLOAD]}}
document_find_duplicates = {'text': _('find duplicates'), 'view': 'document_find_duplicates', 'args': 'object.id', 'famfam': 'page_refresh', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_find_all_duplicates = {'text': _('find all duplicates'), 'view': 'document_find_all_duplicates', 'famfam': 'page_refresh', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_clear_transformations = {'text': _('clear all transformations'), 'view': 'document_clear_transformations', 'args': 'object.id', 'famfam': 'page_paintbrush', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_TRANSFORM]}}
document_multiple_clear_transformations = {'text': _('clear all transformations'), 'view': 'document_multiple_clear_transformations', 'famfam': 'page_paintbrush', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_TRANSFORM]}}

document_page_transformation_list = {'text': _('page transformations'), 'view': 'document_page_transformation_list', 'args': 'object.id', 'famfam': 'pencil_go', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_TRANSFORM]}}
document_page_transformation_create = {'text': _('create new transformation'), 'view': 'document_page_transformation_create', 'args': 'object.id', 'famfam': 'pencil_add', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_TRANSFORM]}}
document_page_transformation_edit = {'text': _('edit'), 'view': 'document_page_transformation_edit', 'args': 'object.id', 'famfam': 'pencil_go', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_TRANSFORM]}}
document_page_transformation_delete = {'text': _('delete'), 'view': 'document_page_transformation_delete', 'args': 'object.id', 'famfam': 'pencil_delete', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_TRANSFORM]}}
document_page_transformation_page_view = {'text': _('page details'), 'view': 'document_page_view', 'args': 'object.document_page.id', 'famfam': 'page_white', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_page_transformation_page_edit = {'text': _('edit page'), 'view': 'document_page_edit', 'args': 'object.document_page.id', 'famfam': 'page_white', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_EDIT]}}
document_page_transformation_page_transformation_list = {'text': _('page transformations'), 'view': 'document_page_transformation_list', 'args': 'object.document_page.id', 'famfam': 'pencil_go', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_TRANSFORM]}}

document_page_view = {'text': _('page image'), 'view': 'document_page_view', 'args': 'object.id', 'famfam': 'page_white', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_page_text = {'text': _('page text'), 'view': 'document_page_text', 'args': 'object.id', 'famfam': 'page_white', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_page_edit = {'text': _('edit page'), 'view': 'document_page_edit', 'args': 'object.id', 'famfam': 'page_white', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_EDIT]}}
document_page_navigation_next = {'text': _('next page'), 'view': 'document_page_navigation_next', 'args': 'object.id', 'famfam': 'resultset_next', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}
document_page_navigation_previous = {'text': _('previous page'), 'view': 'document_page_navigation_previous', 'args': 'object.id', 'famfam': 'resultset_previous', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}

document_missing_list = {'text': _('Find missing document files'), 'view': 'document_missing_list', 'famfam': 'folder_page', 'permissions': {'namespace': 'documents', 'permissions': [PERMISSION_DOCUMENT_VIEW]}}

staging_file_preview = {'text': _('preview'), 'class': 'fancybox-noscaling', 'view': 'staging_file_preview', 'args': 'object.id', 'famfam': 'drive_magnify'}
staging_file_delete = {'text': _('delete'), 'view': 'staging_file_delete', 'args': 'object.id', 'famfam': 'drive_delete'}

register_links(Document, [document_view_simple, document_view, document_edit, document_edit_metadata, document_delete, document_download, document_find_duplicates, document_clear_transformations], menu_name='sidebar')
register_links(Document, [document_list_recent, document_list, document_create, document_create_multiple, document_create_sibling], menu_name='sidebar')
register_multi_item_links(['document_list', 'document_list_recent'], [document_multiple_clear_transformations, document_multiple_edit_metadata, document_multiple_delete])

if ENABLE_SINGLE_DOCUMENT_UPLOAD:
    register_links(['document_list_recent', 'document_list', 'document_create', 'document_create_multiple', 'upload_document_with_type', 'upload_multiple_documents_with_type'], [document_list_recent, document_list, document_create, document_create_multiple], menu_name='sidebar')
else:
    register_links(['document_list_recent', 'document_list', 'document_create', 'document_create_multiple', 'upload_document_with_type', 'upload_multiple_documents_with_type'], [document_list_recent, document_list, document_create_multiple], menu_name='sidebar')

register_links(DocumentPage, [document_page_transformation_list, document_page_view, document_page_text, document_page_edit, document_page_navigation_previous, document_page_navigation_next])

register_links(DocumentPageTransformation, [document_page_transformation_edit, document_page_transformation_delete])
register_links(DocumentPageTransformation, [document_page_transformation_page_edit, document_page_transformation_page_view], menu_name='sidebar')
register_links('document_page_transformation_list', [document_page_transformation_create], menu_name='sidebar')
register_links('document_page_transformation_create', [document_page_transformation_create], menu_name='sidebar')
register_links(['document_page_transformation_edit', 'document_page_transformation_delete'], [document_page_transformation_page_transformation_list], menu_name='sidebar')

register_links(StagingFile, [staging_file_preview, staging_file_delete])

register_diagnostic('documents', _(u'Documents'), document_missing_list)


def document_exists(document):
    try:
        if document.exists():
            return '<span class="famfam active famfam-tick"></span>'
        else:
            return '<span class="famfam active famfam-cross"></span>'
    except Exception, exc:
        return exc


register_model_list_columns(Document, [
        {'name':_(u'thumbnail'), 'attribute':
            lambda x: '<a class="fancybox" href="%s"><img src="%s" /></a>' % (reverse('document_preview', args=[x.id]),
                reverse('document_thumbnail', args=[x.id]))
        },
        {'name':_(u'metadata'), 'attribute':
            lambda x: u', '.join([u'%s - %s' % (metadata.metadata_type, metadata.value) for metadata in x.documentmetadata_set.select_related('metadata_type', 'document').defer('document__document_type', 'document__file', 'document__description', 'document__file_filename', 'document__uuid', 'document__date_added', 'document__date_updated', 'document__file_mimetype', 'document__file_mime_encoding')])
        },
    ])

if ENABLE_SINGLE_DOCUMENT_UPLOAD:
    register_menu([
        {'text': _('documents'), 'view': 'document_create', 'links': [
            document_create, document_create_multiple, document_list,\
            document_list_recent
        ], 'famfam': 'page', 'position': 1}])
else:
    register_menu([
        {'text': _('documents'), 'view': 'document_create_multiple', 'links': [
            document_create_multiple, document_list, document_list_recent
        ], 'famfam': 'page', 'position': 1}])