#!/bin/env python

import argparse
import requests
import tarfile
import time
import json

import urllib3
import _sysconfigdata
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)


class BMC:
    def __init__(self, server):
        self.url = "https://{0}/".format(server)
        self.session = requests.Session()
        self.login()

    def login(self):
        r = self.session.post(self.url + 'login',
                              json={'data': ['root', '0penBmc']},
                              verify=False)
        j = r.json()
        if j['status'] != 'ok':
            raise Exception("Failed to login: \n" + r.text)

    def list_sfw(self):
        r = self.session.get(self.url + 'xyz/openbmc_project/software/',
                             verify=False)
        j = r.json()
        if j['status'] != 'ok':
            raise Exception("Failed to query software: \n" + r.text)

        events = j['data']

        return events

    def get_image(self, image):
        r = self.session.get(self.url + image, verify=False)

        j = r.json()
        if j['status'] != 'ok':
            raise Exception("Failed to get image " + image + ": \n" + r.text)

        return j['data']

    def upload_image(self, image):

        data = open(image,'rb').read()
        r = self.session.post(self.url + "/upload/image",
                              data=data,
                              headers={'Content-Type': 'application/octet-stream'},
                              verify=False)
        j = r.json()
        if j['status'] != 'ok':
            raise Exception("Failed to get event " + image + ": \n" + r.text)

        return j['data']

    def activate_image(self, image_id):
        r = self.session.put(self.url + "/xyz/openbmc_project/software/" + image_id + "/attr/RequestedActivation",
                             json={'data': 'xyz.openbmc_project.Software.Activation.RequestedActivations.Active'},
                             verify=False)

        j = r.json()
        if j['status'] != 'ok':
            raise Exception("Failed to activate image " + image_id + ": \n" + r.text)

        return j['data']

    def update_auto(self, image, reboot):
        image_version = self.__get_image_version(image)
        self.upload_image(image)
        image_id = self.__wait_for_image_id(image_version)
        self.activate_image(image_id)
        self.__wait_for_activation(image_id)
        if reboot:
            self.reboot()

    def reboot(self):
        r = self.session.post(
            self.url + '/org/openbmc/control/bmc0/action/warmReset',
            headers={'Content-Type': 'application/json'},
            data='{"data":[]}',
            verify=False)

        j = r.json()
        if j['status'] != 'ok':
            raise Exception("Failed to reboot BMC:\n" + r.text)

    def __get_image_version(self, image_file_path):
        # Open up the manfest file.
        image_tar = tarfile.open(name=image_file_path, mode='r')
        manifest = image_tar.extractfile('MANIFEST')

        # Find version line.
        for line in manifest:
            if line.startswith('version='):
                manifest.close()
                image_tar.close()
                return line.split('version=', 1)[1].strip()

        # If we didn't find the version line, print an error and return false.
        manifest.close()
        image_tar.close()
        raise Exception("Could not find version line in image manifest")

    def __wait_for_image_id(self, image_version):
        # Try 8 times, once every 15 seconds.
        for attempt in range(8):
            software = self.list_sfw()
            # Look for our the image with the given version in software
            for path in software:
                image = self.get_image(path)
                if image_version == image['Version']:
                    return path.split('/')[-1]
            time.sleep(15)
        return False

    def __wait_for_activation(self, image_id):
        # Keep waiting until the image is active or activation fails.
        active = False
        while not active:
            image = self.get_image("/xyz/openbmc_project/software/" + image_id)
            if 'xyz.openbmc_project.Software.Activation.Activations.Active' \
                    == image['Activation']:
                print 'Activation Progress: 100%'
                active = True
            elif 'xyz.openbmc_project.Software.Activation.Activations.Activating' \
                    == image['Activation']:
                print 'Activation Progress: ' + str(image['Progress']) + '%'
            else:
                raise Exception("Image activation failed. The BMC has set " \
                    + "the'Activation' property to " + image['Activation'])
            time.sleep(15)

def do_list_sfw(args):
    s = BMC(server=args.server)
    for e in s.list_sfw():
        info = s.get_image(e)
        print(e)
        print json.dumps(info, indent=4)

def do_view_image(args):
    s = BMC(server=args.server)
    print json.dumps(s.get_image(args.image), indent=4)

def do_upload_image(args):
    s = BMC(server=args.server)
    s.upload_image(args.image)

def do_activate_image(args):
    s = BMC(server=args.server)
    s.activate_image(args.image_id)

def do_update_auto(args):
    s = BMC(server=args.server)
    s.update_auto(args.image, args.reboot)

parser = argparse.ArgumentParser()
parser.add_argument('--server', help='hostname or IP of BMC', type=str,
                    required=True)

subparsers = parser.add_subparsers()
list_events = subparsers.add_parser('list', help='List all software images on BMC')
list_events.set_defaults(func=do_list_sfw)

image_view = subparsers.add_parser('view', help='View info of input image')
image_view.add_argument('image', help='The image to analyze')
image_view.set_defaults(func=do_view_image)

image_upload = subparsers.add_parser('upload', help='Upload input image')
image_upload.add_argument('image', help='The image to upload')
image_upload.set_defaults(func=do_upload_image)

image_activate = subparsers.add_parser('activate', help='Activate input image id')
image_activate.add_argument('image_id', help='The image id to activate')
image_activate.set_defaults(func=do_activate_image)

image_update_auto = subparsers.add_parser('update_auto', help='Upload and '
    + 'activate an image, and then reboot the BMC to apply the update '
    + 'if necessary')
image_update_auto.add_argument('image', help='The image to update to')
image_update_auto.add_argument(
    '--reboot',
    dest='reboot',
    action='store_true',
    default=False,
    help='Set if the BMC should reboot after the update')
image_update_auto.add_argument(
    '--no-reboot',
    dest='reboot',
    action='store_false',
    default=False,
    help='Setif the BMC should not reboot after the update')
image_update_auto.set_defaults(func=do_update_auto)

args = parser.parse_args()

if 'func' in args:
    args.func(args)
else:
    parser.print_help()