# -*- coding: utf-8 -*-
import logging
import traceback

from django.contrib import admin
from django.contrib import messages
from django.core.mail import mail_admins
from django.utils.text import Truncator
from django.conf import settings

from yandex_webmaster import YandexWebmaster

from .models import Category, Entry, Recipient
from .emails import mail_user_notification
from .forms import CategoryAdminForm


log = logging.getLogger('guestbook')


YANDEX_WEBMASTER_DOMAIN = getattr(settings, 'YANDEX_WEBMASTER_DOMAIN', None)
YANDEX_WEBMASTER_TOKEN = getattr(settings, 'YANDEX_WEBMASTER_TOKEN', None)
#YANDEX_WEBMASTER_TOKEN_EXPIRES = getattr(settings, 'YANDEX_WEBMASTER_TOKEN_EXPIRES', None)

YANDEX_WEBMASTER_ENABLED = YANDEX_WEBMASTER_DOMAIN and YANDEX_WEBMASTER_TOKEN


class CategoryAdmin(admin.ModelAdmin):
    list_display = ['ordering', 'name', 'slug']
    list_display_links = ['name']
    list_editable = ['ordering']
    search_fields = ['name']
    form = CategoryAdminForm


class EntryAdmin(admin.ModelAdmin):
    list_display = ['name', 'short_message', 'category', 'pub_date', 'created_at', 'published']
    list_filter = ['published', 'category', 'created_at', 'pub_date']
    list_per_page = 50
    search_fields = ['name', 'email', 'message', 'reply']
    readonly_fields = ['notified_user', 'added_origtext']

    def short_message(self, obj):
        return Truncator(obj.message).chars(500)
    short_message.short_description = u'Вопрос'

    def save_model(self, request, obj, form, change):
        obj.save()

        # отправка уведомления
        try:
            fail_message = u'Не удалось отправить пользователю уведомление об ответе на его вопрос.'
            fail_level = messages.WARNING
            if obj.published and not obj.notified_user and obj.reply and obj.email:
                result = mail_user_notification(obj.email, obj)
                if result > 0:
                    obj.notified_user = True
                    obj.save()
                    self.message_user(request, u'Пользователю отправлено уведомление об ответе на его вопрос.')
                else:
                    self.message_user(request, fail_message, level=fail_level)
        except Exception as e:
            log.info(u'Next exception for Entry with id=%s' % obj.pk)
            log.exception(e)
            self.message_user(request, fail_message, level=fail_level)

        # отправка в оригинальные тексты
        try:
            if YANDEX_WEBMASTER_ENABLED and not obj.added_origtext and obj.reply:
                text = (u'%s\n%s' % (obj.message, obj.reply)).strip()
                text_len = len(text)
                if text_len >= 500 and text_len <= 32000:
                    api = YandexWebmaster(YANDEX_WEBMASTER_TOKEN, YANDEX_WEBMASTER_DOMAIN)
                    api.add_original_text(text)
                    #
                    obj.added_origtext = True
                    obj.save()
        except Exception as e:
            log.info(u'Next exception for Entry with id=%s' % obj.pk)
            log.exception(e)
            mail_admins(subject=u'guestbook: original texts error',
                message=u'Entry id=%s.\n\n%s' % (obj.pk, traceback.format_exc(e))
            )


class RecipientAdmin(admin.ModelAdmin):
    list_display = ['email']
    search_fields = ['email']


admin.site.register(Category, CategoryAdmin)
admin.site.register(Entry, EntryAdmin)
admin.site.register(Recipient, RecipientAdmin)