from flask import (Blueprint, request, current_app, jsonify, render_template,
                   abort)

from ennstatus.api.functions import check_json_format, update_server
from ennstatus.status.functions import (single_server, all_servers,
                                        all_servers_by_type)

api_page = Blueprint('api', __name__)


@api_page.route('/update', methods=('POST',))
def update():

    current_app.logger.info('Handling update')
    if current_app.debug:
        accepted_ips = ['127.0.0.1']
    else:
        accepted_ips = current_app.config.get('ENNSTATUS_ACCEPTED_IPS', [])

    json = request.get_json()
    if json is None:
        current_app.logger.info('No JSON data supplied!')
        return 'No JSON data supplied!\n', 400, {'Content-Type': 'text/plain'}

    try:
        check_json_format(json)
    except ValueError as e:
        current_app.logger.warning(' '.join([str(e), str(json)]))
        return str(e), 409, {'Content-Type': 'text/plain'}

    if 'ip' in json:
        ip = json['ip']
    else:
        ip = request.remote_addr

    if request.remote_addr not in accepted_ips:
        current_app.logger.warn("Unallowed IP %s tried to update data!"
                                % ip)
        return 'IP not allowed!\n', 403, {'Content-Type': 'text/plain'}

    current_app.logger.info(str(json))    
    server = update_server(server=json, ip=ip)

    if server:
        current_app.logger.info('Return result')
        current_app.logger.info(str(server))
        return (jsonify(server), 201,
                {'Location': '/api/export/json/single?server_name=%s'
                 % server['server_name']})

    else:
        current_app.logger.error("Unexpected error: %s" % server,
                                 exc_info=True)
        return abort(500)


@api_page.route('/export', defaults={'server_type': 'all',
                                     'export_format': 'json'})
@api_page.route('/export/<any("json", "xml"):export_format>',
                defaults={'server_type': 'all'})
@api_page.route(('/export/<any("json", "xml"):export_format>'
                 '/<any("all", "exit", "bridge", "relay", "single")'
                 ':server_type>'))
def export(export_format, server_type):

    current_app.logger.info('Handling export')
    if server_type == 'single':
        server_name = request.args.get('server_name', None)
        if server_name is not None:
            server = single_server(server_name)
            if server:
                if export_format == 'json':
                    current_app.logger.info('Returning server as json!')
                    return jsonify(server)
                else:
                    current_app.logger.info('Returning server as xml!')
                    return (
                        render_template(
                            'api/extract/xml/single_server.xml',
                            server=server),
                        200, {'Content-Type': 'text/xml'})
            else:
                current_app.logger.warning('Server not found!')
                return ('Server not found!\n',
                        404, {'Content-Type': 'text/plain'})
        else:
            current_app.logger.warning('No server_name specified!')
            return ('No server_name specified!\n',
                    400, {'Content-Type': 'text/plain'})

    else:
        if server_type == 'all':
            current_app.logger.info('Getting all servers!')
            servers = list(all_servers())
        else:
            current_app.logger.info('Getting all %s!' % server_type)
            servers = list(all_servers_by_type(server_type.capitalize()))

        if export_format == 'json':
            response = {'enn_network': servers}
            current_app.logger.info('Returning as json!')
            return jsonify(response)
        else:
            current_app.logger.info('Returning as xml!')
            return (render_template('api/extract/xml/network.xml',
                                    servers=servers),
                    200, {'Content-Type': 'text/xml'})