# ~*~ coding: utf-8 ~*~
import json
import re
import time
import os

from celery import shared_task
from django.utils.translation import ugettext as _
from django.core.cache import cache

from common.utils import capacity_convert, \
    sum_capacity, encrypt_password, get_logger
from ops.celery.utils import register_as_period_task, after_app_shutdown_clean

from .models import SystemUser, AdminUser, Asset
from . import const


FORKS = 10
TIMEOUT = 60
logger = get_logger(__file__)
CACHE_MAX_TIME = 60*60*2
disk_pattern = re.compile(r'^hd|sd|xvd|vd')
PERIOD_TASK = os.environ.get("PERIOD_TASK", "off")


def clean_hosts(assets):
    clean_assets = []
    for asset in assets:
        if not asset.is_active:
            msg = _("Asset has been disabled, skipped: {}").format(asset)
            logger.info(msg)
            continue
        if not asset.support_ansible():
            msg = _("Asset may not be support ansible, skipped: {}").format(asset)
            logger.info(msg)
            continue
        clean_assets.append(asset)
    if not clean_assets:
        logger.info(_("No assets matched, stop task"))
    return clean_assets


@shared_task
def set_assets_hardware_info(assets, result, **kwargs):
    """
    Using ops task run result, to update asset info

    @shared_task must be exit, because we using it as a task callback, is must
    be a celery task also
    :param assets:
    :param result:
    :param kwargs: {task_name: ""}
    :return:
    """
    result_raw = result[0]
    assets_updated = []
    success_result = result_raw.get('ok', {})

    for asset in assets:
        hostname = asset.hostname
        info = success_result.get(hostname, {})
        info = info.get('setup', {}).get('ansible_facts', {})
        if not info:
            logger.error(_("Get asset info failed: {}").format(hostname))
            continue
        ___vendor = info.get('ansible_system_vendor', 'Unknown')
        ___model = info.get('ansible_product_name', 'Unknown')
        ___sn = info.get('ansible_product_serial', 'Unknown')

        for ___cpu_model in info.get('ansible_processor', []):
            if ___cpu_model.endswith('GHz') or ___cpu_model.startswith("Intel"):
                break
        else:
            ___cpu_model = 'Unknown'
        ___cpu_model = ___cpu_model[:64]
        ___cpu_count = info.get('ansible_processor_count', 0)
        ___cpu_cores = info.get('ansible_processor_cores', None) or \
                       len(info.get('ansible_processor', []))
        ___cpu_vcpus = info.get('ansible_processor_vcpus', 0)
        ___memory = '%s %s' % capacity_convert(
            '{} MB'.format(info.get('ansible_memtotal_mb'))
        )
        disk_info = {}
        for dev, dev_info in info.get('ansible_devices', {}).items():
            if disk_pattern.match(dev) and dev_info['removable'] == '0':
                disk_info[dev] = dev_info['size']
        ___disk_total = '%s %s' % sum_capacity(disk_info.values())
        ___disk_info = json.dumps(disk_info)

        ___platform = info.get('ansible_system', 'Unknown')
        ___os = info.get('ansible_distribution', 'Unknown')
        ___os_version = info.get('ansible_distribution_version', 'Unknown')
        ___os_arch = info.get('ansible_architecture', 'Unknown')
        ___hostname_raw = info.get('ansible_hostname', 'Unknown')

        for k, v in locals().items():
            if k.startswith('___'):
                setattr(asset, k.strip('_'), v)
        asset.save()
        assets_updated.append(asset)
    return assets_updated


@shared_task
def update_assets_hardware_info_util(assets, task_name=None):
    """
    Using ansible api to update asset hardware info
    :param assets:  asset seq
    :param task_name: task_name running
    :return: result summary ['contacted': {}, 'dark': {}]
    """
    from ops.utils import update_or_create_ansible_task
    if task_name is None:
        task_name = _("Update some assets hardware info")
    tasks = const.UPDATE_ASSETS_HARDWARE_TASKS
    hosts = clean_hosts(assets)
    if not hosts:
        return {}
    created_by = str(assets[0].org_id)
    task, created = update_or_create_ansible_task(
        task_name, hosts=hosts, tasks=tasks, created_by=created_by,
        pattern='all', options=const.TASK_OPTIONS, run_as_admin=True,
    )
    result = task.run()
    # Todo: may be somewhere using
    # Manual run callback function
    set_assets_hardware_info(assets, result)
    return result


@shared_task
def update_asset_hardware_info_manual(asset):
    task_name = _("Update asset hardware info: {}").format(asset.hostname)
    return update_assets_hardware_info_util(
        [asset], task_name=task_name
    )


@shared_task
def update_assets_hardware_info_period():
    """
    Update asset hardware period task
    :return:
    """
    if PERIOD_TASK != "on":
        logger.debug("Period task disabled, update assets hardware info pass")
        return


##  ADMIN USER CONNECTIVE  ##


@shared_task
def test_asset_connectivity_util(assets, task_name=None):
    from ops.utils import update_or_create_ansible_task

    if task_name is None:
        task_name = _("Test assets connectivity")
    hosts = clean_hosts(assets)
    if not hosts:
        return {}
    tasks = const.TEST_ADMIN_USER_CONN_TASKS
    created_by = assets[0].org_id
    task, created = update_or_create_ansible_task(
        task_name=task_name, hosts=hosts, tasks=tasks, pattern='all',
        options=const.TASK_OPTIONS, run_as_admin=True, created_by=created_by,
    )
    result = task.run()
    summary = result[1]
    for asset in assets:
        if asset.hostname in summary.get('dark', {}):
            asset.connectivity = asset.UNREACHABLE
        elif asset.hostname in summary.get('contacted', []):
            asset.connectivity = asset.REACHABLE
        else:
            asset.connectivity = asset.UNKNOWN
    return summary


@shared_task
def test_asset_connectivity_manual(asset):
    task_name = _("Test assets connectivity: {}").format(asset)
    summary = test_asset_connectivity_util([asset], task_name=task_name)

    if summary.get('dark'):
        return False, summary['dark']
    else:
        return True, ""


@shared_task
def test_admin_user_connectivity_util(admin_user, task_name):
    """
    Test asset admin user can connect or not. Using ansible api do that
    :param admin_user:
    :param task_name:
    :return:
    """
    assets = admin_user.get_related_assets()
    hosts = clean_hosts(assets)
    if not hosts:
        return {}
    summary = test_asset_connectivity_util(hosts, task_name)
    return summary


@shared_task
@register_as_period_task(interval=3600)
def test_admin_user_connectivity_period():
    """
    A period task that update the ansible task period
    """
    key = '_JMS_TEST_ADMIN_USER_CONNECTIVITY_PERIOD'
    prev_execute_time = cache.get(key)
    if prev_execute_time:
        logger.debug("Test admin user connectivity, less than 40 minutes, skip")
        return
    cache.set(key, 1, 60*40)
    admin_users = AdminUser.objects.all()
    for admin_user in admin_users:
        task_name = _("Test admin user connectivity period: {}").format(admin_user.name)
        test_admin_user_connectivity_util(admin_user, task_name)


@shared_task
def test_admin_user_connectivity_manual(admin_user):
    task_name = _("Test admin user connectivity: {}").format(admin_user.name)
    return test_admin_user_connectivity_util(admin_user, task_name)


##  System user connective ##

@shared_task
def set_system_user_connectivity_info(system_user, result):
    summary = result[1]
    system_user.connectivity = summary


@shared_task
def test_system_user_connectivity_util(system_user, assets, task_name):
    """
    Test system cant connect his assets or not.
    :param system_user:
    :param assets:
    :param task_name:
    :return:
    """
    from ops.utils import update_or_create_ansible_task
    tasks = const.TEST_SYSTEM_USER_CONN_TASKS
    hosts = clean_hosts(assets)
    if not hosts:
        return {}
    task, created = update_or_create_ansible_task(
        task_name, hosts=hosts, tasks=tasks, pattern='all',
        options=const.TASK_OPTIONS,
        run_as=system_user, created_by=system_user.org_id,
    )
    result = task.run()
    set_system_user_connectivity_info(system_user, result)
    return result


@shared_task
def test_system_user_connectivity_manual(system_user):
    task_name = _("Test system user connectivity: {}").format(system_user)
    assets = system_user.get_related_assets()
    return test_system_user_connectivity_util(system_user, assets, task_name)


@shared_task
def test_system_user_connectivity_a_asset(system_user, asset):
    task_name = _("Test system user connectivity: {} => {}").format(
        system_user, asset
    )
    return test_system_user_connectivity_util(system_user, [asset], task_name)


@shared_task
def test_system_user_connectivity_period():
    if PERIOD_TASK != "on":
        logger.debug("Period task disabled, test system user connectivity pass")
        return
    system_users = SystemUser.objects.all()
    for system_user in system_users:
        task_name = _("Test system user connectivity period: {}").format(system_user)
        assets = system_user.get_related_assets()
        test_system_user_connectivity_util(system_user, assets, task_name)


####  Push system user tasks ####

def get_push_system_user_tasks(system_user):
    # Set root as system user is dangerous
    if system_user.username == "root":
        return []

    tasks = []
    if system_user.password:
        tasks.append({
            'name': 'Add user {}'.format(system_user.username),
            'action': {
                'module': 'user',
                'args': 'name={} shell={} state=present password={}'.format(
                    system_user.username, system_user.shell,
                    encrypt_password(system_user.password, salt="K3mIlKK"),
                ),
            }
        })
        tasks.extend([
            {
               'name': 'Check home dir exists',
               'action': {
                   'module': 'stat',
                   'args': 'path=/home/{}'.format(system_user.username)
               },
               'register': 'home_existed'
            },
            {
                'name': "Set home dir permission",
                'action': {
                    'module': 'file',
                    'args': "path=/home/{0} owner={0} group={0} mode=700".format(system_user.username)
                },
                'when': 'home_existed.stat.exists == true'
            }
        ])
    if system_user.public_key:
        tasks.append({
            'name': 'Set {} authorized key'.format(system_user.username),
            'action': {
                'module': 'authorized_key',
                'args': "user={} state=present key='{}'".format(
                    system_user.username, system_user.public_key
                )
            }
        })
    if system_user.sudo:
        tasks.append({
            'name': 'Set {} sudo setting'.format(system_user.username),
            'action': {
                'module': 'lineinfile',
                'args': "dest=/etc/sudoers state=present regexp='^{0} ALL=' "
                        "line='{0} ALL=(ALL) NOPASSWD: {1}' "
                        "validate='visudo -cf %s'".format(
                    system_user.username,
                    system_user.sudo,
                )
            }
        })
    return tasks


@shared_task
def push_system_user_util(system_user, assets, task_name):
    from ops.utils import update_or_create_ansible_task
    if not system_user.is_need_push():
        msg = _("Push system user task skip, auto push not enable or "
                "protocol is not ssh: {}").format(system_user.name)
        logger.info(msg)
        return

    tasks = get_push_system_user_tasks(system_user)
    hosts = clean_hosts(assets)
    if not hosts:
        return {}
    task, created = update_or_create_ansible_task(
        task_name=task_name, hosts=hosts, tasks=tasks, pattern='all',
        options=const.TASK_OPTIONS, run_as_admin=True,
        created_by=system_user.org_id,
    )
    return task.run()


@shared_task
def push_system_user_to_assets_manual(system_user):
    assets = system_user.get_related_assets()
    task_name = _("Push system users to assets: {}").format(system_user.name)
    return push_system_user_util(system_user, assets, task_name=task_name)


@shared_task
def push_system_user_a_asset_manual(system_user, asset):
    task_name = _("Push system users to asset: {} => {}").format(
        system_user.name, asset
    )
    return push_system_user_util(system_user, [asset], task_name=task_name)


@shared_task
def push_system_user_to_assets(system_user, assets):
    task_name = _("Push system users to assets: {}").format(system_user.name)
    return push_system_user_util(system_user, assets, task_name)


@shared_task
@after_app_shutdown_clean
def test_system_user_connectability_period():
    pass


@shared_task
@after_app_shutdown_clean
def test_admin_user_connectability_period():
    pass


# @shared_task
# @register_as_period_task(interval=3600)
# @after_app_ready_start
# # @after_app_shutdown_clean
# def push_system_user_period():
#     for system_user in SystemUser.objects.all():
#         push_system_user_related_nodes(system_user)




