#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2008-2012  Étienne Loks  <etienne.loks_AT_peacefrogsDOTnet>

# This program 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.

# 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 General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# See the file COPYING for details.

"""
Settings for administration pages
"""
import datetime

from django import forms
from django.conf import settings
from django.contrib import admin, messages
from django.core.exceptions import ObjectDoesNotExist
from django.db.models import Q
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render_to_response
from django.template import RequestContext
from django.utils.translation import ugettext_lazy as _
try:
    from chimere import tasks
except ImportError:
    pass

from chimere.forms import MarkerAdminForm, RouteAdminForm, AreaAdminForm,\
                          NewsAdminForm, CategoryAdminForm, ImporterAdminForm, \
                          PictureFileAdminForm, MultimediaFileAdminForm
from chimere.models import Category, Icon, SubCategory, Marker, \
     PropertyModel, News, Route, Area, ColorTheme, Color, \
     MultimediaFile, PictureFile, Importer, Layer, AreaLayers,\
     get_areas_for_user, get_users_by_area
from chimere.utils import unicode_normalize, ShapefileManager, KMLManager,\
                          CSVManager
from chimere.widgets import TextareaWidget

def validate(modeladmin, request, queryset):
    for item in queryset:
        item.status = 'A'
        item.save()
validate.short_description = _(u"Validate")

def export_to_kml(modeladmin, request, queryset):
    u"""
    Export data to KML
    """
    filename, result = KMLManager.export(queryset)
    response = HttpResponse(result,
                        mimetype='application/vnd.google-earth.kml+xml')
    response['Content-Disposition'] = 'attachment; filename=%s' % filename
    return response
export_to_kml.short_description = _(u"Export to KML")

def export_to_shapefile(modeladmin, request, queryset):
    u"""
    Export data to Shapefile
    """
    filename, zip_stream = ShapefileManager.export(queryset)
    # Stick it all in a django HttpResponse
    response = HttpResponse()
    response['Content-Disposition'] = 'attachment; filename=%s.zip' % filename
    response['Content-length'] = str(len(zip_stream))
    response['Content-Type'] = 'application/zip'
    response.write(zip_stream)
    return response
export_to_shapefile.short_description = _(u"Export to Shapefile")

def export_to_csv(modeladmin, request, queryset):
    u"""
    Export data to CSV
    """
    filename, result = CSVManager.export(queryset)
    response = HttpResponse(result, mimetype='text/csv')
    response['Content-Disposition'] = 'attachment; filename=%s' % filename
    return response
export_to_csv.short_description = _(u"Export to CSV")

def managed_modified(modeladmin, request, queryset):
    if queryset.count() != 1:
        messages.error(request, _(u"Only one item can be managed at a "
                                  u"time."))
        return HttpResponseRedirect(request.get_full_path())

    item = queryset.all()[0]
    if not item.status == 'M':
        try:
            item = modeladmin.model.objects.get(ref_item=item, status='M')
        except ObjectDoesNotExist:
            messages.error(request, _(u"No modified item associated "
                                      u"to the selected item."))
            return HttpResponseRedirect(request.get_full_path())
    item_ref = item.ref_item
    if request.POST.get('rapprochement'):
        couple = [(item, item_ref)]
        if hasattr(item, 'associated_marker'):
            couple.append((item.associated_marker, item_ref.associated_marker))
        for it, it_ref in couple:
            for k in request.POST:
                if not request.POST[k]:
                    continue
                if hasattr(it_ref, k):
                    setattr(it_ref, k, getattr(it, k))
                    it_ref.save()
                elif k.startswith('property_'):
                    try:
                        pm = PropertyModel.get(pk=int(k[len('property_'):]))
                        it_ref.setProperty(pm, it.getProperty(pm))
                    except (ValueError, ObjectDoesNotExist):
                        pass
        if hasattr(item, 'associated_marker'):
            for it in item.associated_marker.all():
                it.delete()
        item.delete()
        messages.success(request, _(u"Modified item traited."))
        return HttpResponseRedirect(request.get_full_path())
    return render_to_response('admin/managed_modified.html',
                              {'item':item, 'item_ref':item_ref},
                              context_instance=RequestContext(request))
managed_modified.short_description = _(u"Managed modified items")

class PictureInline(admin.TabularInline):
    model = PictureFile
    extra = 1
    ordering = ('order',)
    form = PictureFileAdminForm
    readonly_fields = ('height', 'width')
    exclude = ('thumbnailfile', 'thumbnailfile_height', 'thumbnailfile_width')

class MultimediaInline(admin.TabularInline):
    model = MultimediaFile
    extra = 1
    ordering = ('order',)
    form = MultimediaFileAdminForm

class MarkerAdmin(admin.ModelAdmin):
    """
    Specialized the Point field.
    """
    search_fields = ("name",)
    list_display = ('name', 'status')
    list_filter = ('status', 'categories')
    actions = [validate, managed_modified, export_to_kml, export_to_shapefile,
               export_to_csv]
    exclude = ['submiter_session_key', 'import_key', 'import_version',
               'available_date']
    readonly_fields = ['submiter_email', 'submiter_comment', 'import_source',
                       'ref_item', 'modified_since_import']
    form = MarkerAdminForm
    inlines = [MultimediaInline, PictureInline]

    def queryset(self, request):
        qs = self.model._default_manager.get_query_set()
        if not request.user.is_superuser:
            areas = get_areas_for_user(request.user)
            contained = Q()
            for area in areas:
                contained = contained | area.getIncludeMarker()
            qs = qs.filter(contained)
        ordering = self.ordering or ()
        if ordering:
            qs = qs.order_by(*ordering)
        return qs.distinct()

class RouteAdmin(admin.ModelAdmin):
    """
    Specialized the Route field.
    """
    search_fields = ("name",)
    list_display = ('name', 'status')
    list_filter = ('status', 'categories')
    exclude = ['height', 'width']
    form = RouteAdminForm
    readonly_fields = ('associated_file',)
    actions = [validate, managed_modified, export_to_kml, export_to_shapefile,
               export_to_csv]

    def queryset(self, request):
        qs = self.model._default_manager.get_query_set()
        if not request.user.is_superuser:
            areas = get_areas_for_user(request.user)
            contained = Q()
            for area in areas:
                contained = contained | area.getIncludeRoute()
            qs = qs.filter(contained)
        ordering = self.ordering or ()
        if ordering:
            qs = qs.order_by(*ordering)
        return qs

class LayerInline(admin.TabularInline):
    model = AreaLayers
    extra = 1

class AreaAdmin(admin.ModelAdmin):
    """
    Specialized the area field.
    """
    form = AreaAdminForm
    exclude = ['upper_left_corner', 'lower_right_corner']
    inlines = [LayerInline]
    list_display = ['name', 'order', 'available', 'default']

def importing(modeladmin, request, queryset):
    for importer in queryset:
        importer.state = unicode(tasks.IMPORT_MESSAGES['import_pending'][0])
        importer.save()
        tasks.importing(importer.pk)
importing.short_description = _(u"Import")

def cancel_import(modeladmin, request, queryset):
    for importer in queryset:
        importer.state = tasks.IMPORT_MESSAGES['import_cancel'][0]
        importer.save()
cancel_import.short_description = _(u"Cancel import")

def cancel_export(modeladmin, request, queryset):
    for importer in queryset:
        importer.state = tasks.IMPORT_MESSAGES['export_cancel'][0]
        importer.save()
cancel_export.short_description = _(u"Cancel export")

def export_to_osm(modeladmin, request, queryset):
    importers = modeladmin.model.objects.filter(importer_type='OSM')
    for importer in queryset:
        importer.state = unicode(tasks.IMPORT_MESSAGES['export_pending'][0])
        importer.save()
        tasks.exporting(importer.pk)
export_to_osm.short_description = _(u"Export to osm")

class ImporterAdmin(admin.ModelAdmin):
    form = ImporterAdminForm
    list_display = ('display_categories', 'default_name', 'importer_type',
                    'source', 'state', 'filtr')
    list_filter = ('importer_type',)
    readonly_fields = ('state',)
    actions = [importing, cancel_import, export_to_osm, cancel_export]
admin.site.register(Importer, ImporterAdmin)

class PropertyModelAdmin(admin.ModelAdmin):
    list_display = ('name', 'order', 'available')

class NewsAdmin(admin.ModelAdmin):
    """
    Use the TinyMCE widget for the news content
    """
    form = NewsAdminForm

class SubcatInline(admin.TabularInline):
    model = SubCategory
    extra = 1

class CategoryAdmin(admin.ModelAdmin):
    """
    Use the TinyMCE widget for categories
    """
    form = CategoryAdminForm
    inlines = [SubcatInline]
    list_display = ['name', 'order']

class ColorInline(admin.TabularInline):
    model = Color

class ColorThemeAdmin(admin.ModelAdmin):
    inlines = [ColorInline,]

class IconAdmin(admin.ModelAdmin):
    exclude = ['height', 'width']

# register of differents database fields
admin.site.register(News, NewsAdmin)
admin.site.register(Category, CategoryAdmin)
admin.site.register(Icon, IconAdmin)
admin.site.register(Marker, MarkerAdmin)
admin.site.register(Route, RouteAdmin)
admin.site.register(PropertyModel, PropertyModelAdmin)
admin.site.register(Area, AreaAdmin)
admin.site.register(ColorTheme, ColorThemeAdmin)
admin.site.register(Layer)