import logging

from flask import Blueprint, request, abort
from flask_restful import Resource, Api
from flask_restful.utils.cors import crossdomain
from data import model
from email.utils import formatdate
from calendar import timegm
from functools import partial, wraps
from jsonschema import validate, ValidationError

from config_app.c_app import app, IS_KUBERNETES
from config_app.config_endpoints.exception import InvalidResponse, InvalidRequest

logger = logging.getLogger(__name__)
api_bp = Blueprint('api', __name__)

CROSS_DOMAIN_HEADERS = ['Authorization', 'Content-Type', 'X-Requested-With']


class ApiExceptionHandlingApi(Api):
  pass

  @crossdomain(origin='*', headers=CROSS_DOMAIN_HEADERS)
  def handle_error(self, error):
    return super(ApiExceptionHandlingApi, self).handle_error(error)


api = ApiExceptionHandlingApi()

api.init_app(api_bp)

def log_action(kind, user_or_orgname, metadata=None, repo=None, repo_name=None):
  if not metadata:
    metadata = {}

  if repo:
    repo_name = repo.name

  model.log.log_action(kind, user_or_orgname, repo_name, user_or_orgname, request.remote_addr, metadata)

def format_date(date):
  """ Output an RFC822 date format. """
  if date is None:
    return None
  return formatdate(timegm(date.utctimetuple()))



def resource(*urls, **kwargs):
  def wrapper(api_resource):
    if not api_resource:
      return None

    api_resource.registered = True
    api.add_resource(api_resource, *urls, **kwargs)
    return api_resource

  return wrapper


class ApiResource(Resource):
  registered = False
  method_decorators = []

  def options(self):
    return None, 200


def add_method_metadata(name, value):
  def modifier(func):
    if func is None:
      return None

    if '__api_metadata' not in dir(func):
      func.__api_metadata = {}
    func.__api_metadata[name] = value
    return func

  return modifier


def method_metadata(func, name):
  if func is None:
    return None

  if '__api_metadata' in dir(func):
    return func.__api_metadata.get(name, None)
  return None


def no_cache(f):
  @wraps(f)
  def add_no_cache(*args, **kwargs):
    response = f(*args, **kwargs)
    if response is not None:
      response.headers['Cache-Control'] = 'no-cache, no-store, must-revalidate'
    return response
  return add_no_cache


def define_json_response(schema_name):
  def wrapper(func):
    @add_method_metadata('response_schema', schema_name)
    @wraps(func)
    def wrapped(self, *args, **kwargs):
      schema = self.schemas[schema_name]
      resp = func(self, *args, **kwargs)

      if app.config['TESTING']:
        try:
          validate(resp, schema)
        except ValidationError as ex:
          raise InvalidResponse(ex.message)

      return resp
    return wrapped
  return wrapper


def validate_json_request(schema_name, optional=False):
  def wrapper(func):
    @add_method_metadata('request_schema', schema_name)
    @wraps(func)
    def wrapped(self, *args, **kwargs):
      schema = self.schemas[schema_name]
      try:
        json_data = request.get_json()
        if json_data is None:
          if not optional:
            raise InvalidRequest('Missing JSON body')
        else:
          validate(json_data, schema)
        return func(self, *args, **kwargs)
      except ValidationError as ex:
        raise InvalidRequest(ex.message)
    return wrapped
  return wrapper

def kubernetes_only(f):
  """ Aborts the request with a 400 if the app is not running on kubernetes """
  @wraps(f)
  def abort_if_not_kube(*args, **kwargs):
    if not IS_KUBERNETES:
      abort(400)

    return f(*args, **kwargs)
  return abort_if_not_kube

nickname = partial(add_method_metadata, 'nickname')


import config_app.config_endpoints.api
import config_app.config_endpoints.api.discovery
import config_app.config_endpoints.api.suconfig
import config_app.config_endpoints.api.superuser
import config_app.config_endpoints.api.user
import config_app.config_endpoints.api.tar_config_loader