import os
import platform
import sys

from django.shortcuts import render
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_protect

import neboard
from boards.authors import authors
from boards.utils import cached_result
from boards.views.base import BaseBoardView
from boards.models import Post


PARAM_AUTHORS = 'authors'
PARAM_MEDIA_SIZE = 'media_size'
PARAM_POST_COUNT = 'post_count'
PARAM_POST_PER_DAY = 'post_per_day'
PARAM_POST_PER_WEEK = 'post_per_week'
PARAM_POST_PER_MONTH = 'post_per_month'
PARAM_PLATFORM = 'platform'
PARAM_PYTHON = 'python'
PARAM_HOSTS = 'hosts'


class AuthorsView(BaseBoardView):
    @method_decorator(csrf_protect)
    def get(self, request):
        params = dict()
        params[PARAM_AUTHORS] = authors
        params[PARAM_MEDIA_SIZE] = self._get_directory_size(neboard.settings.MEDIA_ROOT)
        params[PARAM_POST_COUNT] = Post.objects.count()

        params[PARAM_PLATFORM] = platform.platform()
        python_version = sys.version_info
        params[PARAM_PYTHON] = '{}.{}.{}'.format(python_version.major,
                python_version.minor, python_version.micro)

        params[PARAM_POST_PER_DAY] = Post.objects.get_post_per_days(1)
        params[PARAM_POST_PER_WEEK] = Post.objects.get_post_per_days(7)
        params[PARAM_POST_PER_MONTH] = Post.objects.get_post_per_days(30)

        params[PARAM_HOSTS] = self._get_host_list()

        return render(request, 'boards/authors.html', params)

    @cached_result()
    def _get_directory_size(self, directory):
        total_size = 0
        for dirpath, dirnames, filenames in os.walk(directory):
            for f in filenames:
                fp = os.path.join(dirpath, f)
                total_size += os.path.getsize(fp)
        return total_size

    @cached_result()
    def _get_host_list(self):
        return ['<a href="http://{}/">{}</a>'.format(host, host) for host in neboard.settings.ALLOWED_HOSTS if host != '*']