import logging
import logging.config
import urllib2
import re
import os
import hashlib

from _init import STATIC_FONTS_DIR, STATIC_WEBFONTS_DIR, STATIC_LDN_DIR
from util.log import logfile_path


LOCAL_PATH = '/static/ldn/'

MAX_RETRY_COUNT = 3

EXTERNAL_JS = [
  'code.jquery.com/jquery.js',
  'netdna.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js',
  'ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular.min.js',
  'ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular-route.min.js',
  'ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular-sanitize.min.js',
  'ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular-animate.min.js',
  'ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular-cookies.min.js',
  'cdn.jsdelivr.net/g/momentjs',
  'cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.2.0/js/bootstrap-datepicker.min.js',
  'cdnjs.cloudflare.com/ajax/libs/bootstrap-datetimepicker/4.17.37/js/bootstrap-datetimepicker.min.js',
  'cdn.jsdelivr.net/g/bootbox@4.1.0,underscorejs@1.5.2,restangular@1.2.0,d3js@3.3.3',
  'cdn.ravenjs.com/3.1.0/angular/raven.min.js',
  'cdn.jsdelivr.net/cal-heatmap/3.3.10/cal-heatmap.min.js',
  'cdnjs.cloudflare.com/ajax/libs/angular-recaptcha/4.1.3/angular-recaptcha.min.js',
  'cdnjs.cloudflare.com/ajax/libs/ng-tags-input/3.1.1/ng-tags-input.min.js',
  'cdnjs.cloudflare.com/ajax/libs/corejs-typeahead/1.1.1/typeahead.bundle.min.js',
]

EXTERNAL_CSS = [
  'use.fontawesome.com/releases/v5.0.4/css/all.css',
  'netdna.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.css',
  'netdna.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css',
  'fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,700',
  's3.amazonaws.com/cdn.core-os.net/icons/core-icons.css',
  'cdnjs.cloudflare.com/ajax/libs/bootstrap-datetimepicker/4.17.37/css/bootstrap-datetimepicker.min.css',
  'cdn.jsdelivr.net/cal-heatmap/3.3.10/cal-heatmap.css',
  'cdnjs.cloudflare.com/ajax/libs/ng-tags-input/3.1.1/ng-tags-input.min.css',
]

EXTERNAL_FONTS = [
  'netdna.bootstrapcdn.com/font-awesome/4.7.0/fonts/fontawesome-webfont.eot?v=4.7.0',
  'netdna.bootstrapcdn.com/font-awesome/4.7.0/fonts/fontawesome-webfont.woff?v=4.7.0',
  'netdna.bootstrapcdn.com/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0',
  'netdna.bootstrapcdn.com/font-awesome/4.7.0/fonts/fontawesome-webfont.ttf?v=4.7.0',
  'netdna.bootstrapcdn.com/font-awesome/4.7.0/fonts/fontawesome-webfont.svg?v=4.7.0',

  'netdna.bootstrapcdn.com/bootstrap/3.3.2/fonts/glyphicons-halflings-regular.eot',
  'netdna.bootstrapcdn.com/bootstrap/3.3.2/fonts/glyphicons-halflings-regular.woff2',
  'netdna.bootstrapcdn.com/bootstrap/3.3.2/fonts/glyphicons-halflings-regular.woff',
  'netdna.bootstrapcdn.com/bootstrap/3.3.2/fonts/glyphicons-halflings-regular.ttf',
  'netdna.bootstrapcdn.com/bootstrap/3.3.2/fonts/glyphicons-halflings-regular.svg',
]

EXTERNAL_WEBFONTS = [
  'use.fontawesome.com/releases/v5.0.4/webfonts/fa-regular-400.ttf',
  'use.fontawesome.com/releases/v5.0.4/webfonts/fa-regular-400.woff',
  'use.fontawesome.com/releases/v5.0.4/webfonts/fa-regular-400.woff2',

  'use.fontawesome.com/releases/v5.0.4/webfonts/fa-solid-900.ttf',
  'use.fontawesome.com/releases/v5.0.4/webfonts/fa-solid-900.woff',
  'use.fontawesome.com/releases/v5.0.4/webfonts/fa-solid-900.woff2',

  'use.fontawesome.com/releases/v5.0.4/webfonts/fa-brands-400.ttf',
  'use.fontawesome.com/releases/v5.0.4/webfonts/fa-brands-400.woff',
  'use.fontawesome.com/releases/v5.0.4/webfonts/fa-brands-400.woff2',
]

EXTERNAL_CSS_FONTS = [
  's3.amazonaws.com/cdn.core-os.net/icons/core-icons.eot',
  's3.amazonaws.com/cdn.core-os.net/icons/core-icons.woff',
  's3.amazonaws.com/cdn.core-os.net/icons/core-icons.ttf',
  's3.amazonaws.com/cdn.core-os.net/icons/core-icons.svg',
]


logger = logging.getLogger(__name__)


def get_external_javascript(local=False):
  if local:
    return [LOCAL_PATH + format_local_name(src) for src in EXTERNAL_JS]

  return ['//' + src for src in EXTERNAL_JS]


def get_external_css(local=False, exclude=None):
  exclude = exclude or []
  if local:
    return [LOCAL_PATH + format_local_name(src) for src in EXTERNAL_CSS if src not in exclude]

  return ['//' + src for src in EXTERNAL_CSS if src not in exclude]


def format_local_name(url):
  filename = url.split('/')[-1]
  filename = re.sub(r'[+,?@=:]', '', filename)

  url_hash = hashlib.sha256(url).hexdigest()[0:12]
  filename += '-' + url_hash

  if not filename.endswith('.css') and not filename.endswith('.js'):
    if filename.find('css') >= 0:
      filename = filename + '.css'
    else:
      filename = filename + '.js'

  return filename


def _download_url(url):
  for index in range(0, MAX_RETRY_COUNT):
    try:
      response = urllib2.urlopen(url)
      return response.read()
    except urllib2.URLError:
      logger.exception('Got exception when trying to download URL %s (try #%s)', url, index + 1)

  raise Exception('Aborted due to maximum retries reached')


if __name__ == '__main__':
  logging.config.fileConfig(logfile_path(debug=False), disable_existing_loggers=False)

  resources = [
    (STATIC_LDN_DIR, EXTERNAL_JS + EXTERNAL_CSS, True),
    (STATIC_LDN_DIR, EXTERNAL_CSS_FONTS, False),
    (STATIC_FONTS_DIR, EXTERNAL_FONTS, False),
    (STATIC_WEBFONTS_DIR, EXTERNAL_WEBFONTS, False),
  ]

  for local_directory, urls, requires_hashing in resources:
    for url in urls:
      if requires_hashing:
        filename = format_local_name(url)
      else:
        filename = os.path.basename(url).split('?')[0]

      path = os.path.join(local_directory, filename)
      print 'Downloading %s to %s' % (url, path)
      contents = _download_url('https://' + url)

      with open(path, "wb") as local_file:
        local_file.write(contents)