#!/usr/bin/env python3

# pvcbootstrapd.py - PVC Cluster Auto-bootstrap
# Part of the Parallel Virtual Cluster (PVC) system
#
#    Copyright (C) 2018-2021 Joshua M. Boniface <joshua@boniface.me>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, version 3.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
#
###############################################################################

import flask
import json

from pvcbootstrapd.Daemon import config, API_VERSION

import pvcbootstrapd.lib.dnsmasq as dnsmasq
import pvcbootstrapd.lib.lib as lib
import pvcbootstrapd.lib.db as db
import pvcbootstrapd.lib.git as git
import pvcbootstrapd.lib.ansible as ansible

from time import sleep
from threading import Thread, Event
from dataclasses import dataclass
from flask_restful import Resource, Api, abort
from celery import Celery
from celery.utils.log import get_task_logger


logger = get_task_logger(__name__)


# Create Flask app and set config values
app = flask.Flask(__name__)
blueprint = flask.Blueprint('api', __name__, url_prefix='')
api = Api(blueprint)
app.register_blueprint(blueprint)

app.config["CELERY_BROKER_URL"] = f"redis://{config['queue_address']}:{config['queue_port']}{config['queue_path']}"

celery = Celery(app.name, broker=app.config["CELERY_BROKER_URL"])
celery.conf.update(app.config)


#
# Celery functions
#
@celery.task(bind=True)
def dnsmasq_checkin(self, data):
    lib.dnsmasq_checkin(config, data)


@celery.task(bind=True)
def host_checkin(self, data):
    lib.host_checkin(config, data)


#
# API routes
#
class API_Root(Resource):
    def get(self):
        """
        Return basic details of the API
        ---
        tags:
          - root
        responses:
          200:
            description: OK
            schema:
              type: object
              id: Message
              properties:
                message:
                  type: string
                  description: A text message describing the result
                  example: "The foo was successfully maxed"
        """
        return { "message": "pvcbootstrapd API" }, 200
api.add_resource(API_Root, '/')


class API_Checkin(Resource):
    def get(self):
        """
        Return checkin details of the API
        ---
        tags:
          - checkin
        responses:
          200:
            description: OK
            schema:
              type: object
              id: Message
        """
        return { "message": "pvcbootstrapd API Checkin interface" }, 200
api.add_resource(API_Checkin, '/checkin')


class API_Checkin_DNSMasq(Resource):
    def post(self):
        """
        Register a checkin from the DNSMasq subsystem
        ---
        tags:
          - checkin
        consumes:
          - application/json
        parameters:
          - in: body
            name: dnsmasq_checkin_event
            description: An event checkin from an external bootstrap tool component.
            schema:
              type: object
              required:
                - action
              properties:
                action:
                  type: string
                  description: The action of the event.
                  example: "add"
                macaddr:
                  type: string
                  description: (add, old) The MAC address from a DHCP request.
                  example: "ff:ff:ff:ab:cd:ef"
                ipaddr:
                  type: string
                  description: (add, old) The IP address from a DHCP request.
                  example: "10.199.199.10"
                hostname:
                  type: string
                  description: (add, old) The client hostname from a DHCP request.
                  example: "pvc-installer-live"
                client_id:
                  type: string
                  description: (add, old) The client ID from a DHCP request.
                  example: "01:ff:ff:ff:ab:cd:ef"
                vendor_class:
                  type: string
                  description: (add, old) The DHCP vendor-class option from a DHCP request.
                  example: "CPQRIB3 (HP Proliant DL360 G6 iLO)"
                user_class:
                  type: string
                  description: (add, old) The DHCP user-class option from a DHCP request.
                  example: None
        responses:
          200:
            description: OK
            schema:
              type: object
              id: Message
        """
        try:
            data = json.loads(flask.request.data)
        except Exception as e:
            logger.warn(e)
            data = { 'action': None }
        logger.info(f"Handling DNSMasq checkin for: {data}")

        task = dnsmasq_checkin.delay(data)
        return { "message": "received checkin from DNSMasq" }, 200
api.add_resource(API_Checkin_DNSMasq, '/checkin/dnsmasq')


class API_Checkin_Host(Resource):
    def post(self):
        """
        Register a checkin from the Host subsystem
        ---
        tags:
          - checkin
        consumes:
          - application/json
        parameters:
          - in: body
            name: host_checkin_event
            description: An event checkin from an external bootstrap tool component.
            schema:
              type: object
              required:
                - action
              properties:
                action:
                  type: string
                  description: The action of the event.
                  example: "begin"
                hostname:
                  type: string
                  description: The system hostname.
                  example: "hv1.mydomain.tld"
                host_macaddr:
                  type: string
                  description: The MAC address of the system provisioning interface.
                  example: "ff:ff:ff:ab:cd:ef"
                host_ipaddr:
                  type: string
                  description: The IP address of the system provisioning interface.
                  example: "10.199.199.11"
                bmc_macaddr:
                  type: string
                  description: The MAC address of the system BMC interface.
                  example: "ff:ff:ff:01:23:45"
                bmc_ipaddr:
                  type: string
                  description: The IP addres of the system BMC interface.
                  example: "10.199.199.10"
        responses:
          200:
            description: OK
            schema:
              type: object
              id: Message
        """
        try:
            data = json.loads(flask.request.data)
        except Exception as e:
            data = { 'action': None }
        logger.info(f"Handling Host checkin for: {data}")

        task = host_checkin.delay(data)
        return { "message": "received checkin from Host" }, 200
api.add_resource(API_Checkin_Host, '/checkin/host')