# -*- coding: utf-8 -*-

# Dell EMC OpenManage Ansible Modules
# Version 5.0.1
# Copyright (C) 2019-2022 Dell Inc. or its subsidiaries. All Rights Reserved.

# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:

#    * Redistributions of source code must retain the above copyright notice,
#      this list of conditions and the following disclaimer.

#    * Redistributions in binary form must reproduce the above copyright notice,
#      this list of conditions and the following disclaimer in the documentation
#      and/or other materials provided with the distribution.

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#


from __future__ import (absolute_import, division, print_function)

__metaclass__ = type

import json
import os
import time
from ansible.module_utils.urls import open_url, ConnectionError, SSLValidationError
from ansible.module_utils.six.moves.urllib.error import URLError, HTTPError
from ansible.module_utils.six.moves.urllib.parse import urlencode

ome_auth_params = {
    "hostname": {"required": True, "type": "str"},
    "username": {"required": True, "type": "str"},
    "password": {"required": True, "type": "str", "no_log": True},
    "port": {"type": "int", "default": 443},
    "validate_certs": {"type": "bool", "default": True},
    "ca_path": {"type": "path"},
    "timeout": {"type": "int", "default": 30},
}

SESSION_RESOURCE_COLLECTION = {
    "SESSION": "SessionService/Sessions",
    "SESSION_ID": "SessionService/Sessions('{Id}')",
}

JOB_URI = "JobService/Jobs({job_id})"
JOB_SERVICE_URI = "JobService/Jobs"


class OpenURLResponse(object):
    """Handles HTTPResponse"""

    def __init__(self, resp):
        self.body = None
        self.resp = resp
        if self.resp:
            self.body = self.resp.read()

    @property
    def json_data(self):
        try:
            return json.loads(self.body)
        except ValueError:
            raise ValueError("Unable to parse json")

    @property
    def status_code(self):
        return self.resp.getcode()

    @property
    def success(self):
        return self.status_code in (200, 201, 202, 204)

    @property
    def token_header(self):
        return self.resp.headers.get('X-Auth-Token')


class RestOME(object):
    """Handles OME API requests"""

    def __init__(self, module_params=None, req_session=False):
        self.module_params = module_params
        self.hostname = self.module_params["hostname"]
        self.username = self.module_params["username"]
        self.password = self.module_params["password"]
        self.port = self.module_params["port"]
        self.validate_certs = self.module_params.get("validate_certs", True)
        self.ca_path = self.module_params.get("ca_path")
        self.timeout = self.module_params.get("timeout", 30)
        self.req_session = req_session
        self.session_id = None
        self.protocol = 'https'
        self._headers = {'Content-Type': 'application/json', 'Accept': 'application/json'}

    def _get_base_url(self):
        """builds base url"""
        return '{0}://{1}:{2}/api'.format(self.protocol, self.hostname, self.port)

    def _build_url(self, path, query_param=None):
        """builds complete url"""
        url = path
        base_uri = self._get_base_url()
        if path:
            url = '{0}/{1}'.format(base_uri, path)
        if query_param:
            """Ome filtering does not work as expected when '+' is passed,
            urlencode will encode spaces as '+' so replace it to '%20'"""
            url += "?{0}".format(urlencode(query_param).replace('+', '%20'))
        return url

    def _url_common_args_spec(self, method, api_timeout, headers=None):
        """Creates an argument common spec"""
        req_header = self._headers
        if headers:
            req_header.update(headers)
        if api_timeout is None:
            api_timeout = self.timeout
        if self.ca_path is None:
            self.ca_path = self._get_omam_ca_env()
        url_kwargs = {
            "method": method,
            "validate_certs": self.validate_certs,
            "ca_path": self.ca_path,
            "use_proxy": True,
            "headers": req_header,
            "timeout": api_timeout,
            "follow_redirects": 'all',
        }
        return url_kwargs

    def _args_without_session(self, method, api_timeout, headers=None):
        """Creates an argument spec in case of basic authentication"""
        req_header = self._headers
        if headers:
            req_header.update(headers)
        url_kwargs = self._url_common_args_spec(method, api_timeout, headers=headers)
        url_kwargs["url_username"] = self.username
        url_kwargs["url_password"] = self.password
        url_kwargs["force_basic_auth"] = True
        return url_kwargs

    def _args_with_session(self, method, api_timeout, headers=None):
        """Creates an argument spec, in case of authentication with session"""
        url_kwargs = self._url_common_args_spec(method, api_timeout, headers=headers)
        url_kwargs["force_basic_auth"] = False
        return url_kwargs

    def invoke_request(self, method, path, data=None, query_param=None, headers=None,
                       api_timeout=None, dump=True):
        """
        Sends a request through open_url
        Returns :class:`OpenURLResponse` object.
        :arg method: HTTP verb to use for the request
        :arg path: path to request without query parameter
        :arg data: (optional) Payload to send with the request
        :arg query_param: (optional) Dictionary of query parameter to send with request
        :arg headers: (optional) Dictionary of HTTP Headers to send with the
            request
        :arg api_timeout: (optional) How long to wait for the server to send
            data before giving up
        :arg dump: (Optional) boolean value for dumping payload data.
        :returns: OpenURLResponse
        """
        try:
            if 'X-Auth-Token' in self._headers:
                url_kwargs = self._args_with_session(method, api_timeout, headers=headers)
            else:
                url_kwargs = self._args_without_session(method, api_timeout, headers=headers)
            if data and dump:
                data = json.dumps(data)
            url = self._build_url(path, query_param=query_param)
            resp = open_url(url, data=data, **url_kwargs)
            resp_data = OpenURLResponse(resp)
        except (HTTPError, URLError, SSLValidationError, ConnectionError) as err:
            raise err
        return resp_data

    def __enter__(self):
        """Creates sessions by passing it to header"""
        if self.req_session:
            payload = {'UserName': self.username,
                       'Password': self.password,
                       'SessionType': 'API', }
            path = SESSION_RESOURCE_COLLECTION["SESSION"]
            resp = self.invoke_request('POST', path, data=payload)
            if resp and resp.success:
                self.session_id = resp.json_data.get("Id")
                self._headers["X-Auth-Token"] = resp.token_header
            else:
                msg = "Could not create the session"
                raise ConnectionError(msg)
        return self

    def __exit__(self, exc_type, exc_value, traceback):
        """Deletes a session id, which is in use for request"""
        if self.session_id:
            path = SESSION_RESOURCE_COLLECTION["SESSION_ID"].format(Id=self.session_id)
            self.invoke_request('DELETE', path)
        return False

    def get_all_report_details(self, uri):
        """
        This implementation mainly dependent on '@odata.count' value.
        Currently first request without query string, always returns total number of available
        reports in '@odata.count'.
        """
        try:
            resp = self.invoke_request('GET', uri)
            data = resp.json_data
            report_list = data["value"]
            total_count = data['@odata.count']
            remaining_count = total_count - len(report_list)
            first_page_count = len(report_list)
            while remaining_count > 0:
                resp = self.invoke_request('GET', uri,
                                           query_param={"$top": first_page_count, "$skip": len(report_list)})
                data = resp.json_data
                value = data["value"]
                report_list.extend(value)
                remaining_count = remaining_count - len(value)
            return {"resp_obj": resp, "report_list": report_list}
        except (URLError, HTTPError, SSLValidationError, ConnectionError, TypeError, ValueError) as err:
            raise err

    def get_job_type_id(self, jobtype_name):
        """This provides an ID of the job type."""
        job_type_id = None
        resp = self.invoke_request('GET', "JobService/JobTypes")
        data = resp.json_data["value"]
        for each in data:
            if each["Name"] == jobtype_name:
                job_type_id = each["Id"]
                break
        return job_type_id

    def get_device_id_from_service_tag(self, service_tag):
        """
        :param service_tag: service tag of the device
        :return: dict
        Id: int: device id
        value: dict: device id details
        not_found_msg: str: message if service tag not found
        """
        device_id = None
        query = "DeviceServiceTag eq '{0}'".format(service_tag)
        response = self.invoke_request("GET", "DeviceService/Devices", query_param={"$filter": query})
        value = response.json_data.get("value", [])
        device_info = {}
        if value:
            device_info = value[0]
            device_id = device_info["Id"]
        return {"Id": device_id, "value": device_info}

    def get_all_items_with_pagination(self, uri):
        """
         This implementation mainly to get all available items from ome for pagination
         supported GET uri
        :param uri: uri which supports pagination
        :return: dict.
        """
        try:
            resp = self.invoke_request('GET', uri)
            data = resp.json_data
            total_items = data.get("value", [])
            total_count = data.get('@odata.count', 0)
            next_link = data.get('@odata.nextLink', '')
            while next_link:
                resp = self.invoke_request('GET', next_link.split('/api')[-1])
                data = resp.json_data
                value = data["value"]
                next_link = data.get('@odata.nextLink', '')
                total_items.extend(value)
            return {"total_count": total_count, "value": total_items}
        except (URLError, HTTPError, SSLValidationError, ConnectionError, TypeError, ValueError) as err:
            raise err

    def get_device_type(self):
        """
        Returns device type map where as key is type and value is type name
        eg: {1000: "SERVER", 2000: "CHASSIS", 4000: "NETWORK_IOM", "8000": "STORAGE_IOM", 3000: "STORAGE"}
        :return: dict, first item dict gives device type map
        """
        device_map = {}
        response = self.invoke_request("GET", "DeviceService/DeviceType")
        if response.json_data.get("value"):
            device_map = dict([(item["DeviceType"], item["Name"]) for item in response.json_data["value"]])
        return device_map

    def get_job_info(self, job_id):
        try:
            job_status_map = {
                2020: "Scheduled", 2030: "Queued", 2040: "Starting", 2050: "Running", 2060: "Completed",
                2070: "Failed", 2090: "Warning", 2080: "New", 2100: "Aborted", 2101: "Paused", 2102: "Stopped",
                2103: "Canceled"
            }
            failed_job_status = [2070, 2090, 2100, 2101, 2102, 2103]
            job_url = JOB_URI.format(job_id=job_id)
            job_resp = self.invoke_request('GET', job_url)
            job_dict = job_resp.json_data
            job_status = job_dict['LastRunStatus']['Id']
            if job_status in [2060, 2020]:
                job_failed = False
                message = "Job {0} successfully.".format(job_status_map[job_status])
                exit_poll = True
                return exit_poll, job_failed, message
            elif job_status in failed_job_status:
                exit_poll = True
                job_failed = True
                message = "Job is in {0} state, and is not completed.".format(job_status_map[job_status])
                return exit_poll, job_failed, message
            return False, False, None
        except HTTPError:
            job_failed = True
            message = "Unable to track the job status of {0}.".format(job_id)
            exit_poll = True
            return exit_poll, job_failed, message

    def job_tracking(self, job_id, job_wait_sec=600, sleep_time=60):
        """
        job_id: job id
        job_wait_sec: Maximum time to wait to fetch the final job details in seconds
        sleep_time: Maximum time to sleep in seconds in each job details fetch
        """
        max_sleep_time = job_wait_sec
        sleep_interval = sleep_time
        while max_sleep_time:
            if max_sleep_time > sleep_interval:
                max_sleep_time = max_sleep_time - sleep_interval
            else:
                sleep_interval = max_sleep_time
                max_sleep_time = 0
            time.sleep(sleep_interval)
            exit_poll, job_failed, job_message = self.get_job_info(job_id)
            if exit_poll is True:
                return job_failed, job_message
        return True, "The job is not complete after {0} seconds.".format(job_wait_sec)

    def strip_substr_dict(self, odata_dict, chkstr='@odata.'):
        cp = odata_dict.copy()
        klist = cp.keys()
        for k in klist:
            if chkstr in str(k).lower():
                odata_dict.pop(k)
        return odata_dict

    def job_submission(self, job_name, job_desc, targets, params, job_type,
                       schedule="startnow", state="Enabled"):
        job_payload = {"JobName": job_name, "JobDescription": job_desc,
                       "Schedule": schedule, "State": state, "Targets": targets,
                       "Params": params, "JobType": job_type}
        response = self.invoke_request("POST", JOB_SERVICE_URI, data=job_payload)
        return response

    def test_network_connection(self, share_address, share_path, share_type,
                                share_user=None, share_password=None, share_domain=None):
        job_type = {"Id": 56, "Name": "ValidateNWFileShare_Task"}
        params = [
            {"Key": "checkPathOnly", "Value": "false"},
            {"Key": "shareType", "Value": share_type},
            {"Key": "ShareNetworkFilePath", "Value": share_path},
            {"Key": "shareAddress", "Value": share_address},
            {"Key": "testShareWriteAccess", "Value": "true"}
        ]
        if share_user is not None:
            params.append({"Key": "UserName", "Value": share_user})
        if share_password is not None:
            params.append({"Key": "Password", "Value": share_password})
        if share_domain is not None:
            params.append({"Key": "domainName", "Value": share_domain})
        job_response = self.job_submission("Validate Share", "Validate Share", [], params, job_type)
        return job_response

    def check_existing_job_state(self, job_type_name):
        query_param = {"$filter": "LastRunStatus/Id eq 2030 or LastRunStatus/Id eq 2040 or LastRunStatus/Id eq 2050"}
        job_resp = self.invoke_request("GET", JOB_SERVICE_URI, query_param=query_param)
        job_lst = job_resp.json_data["value"] if job_resp.json_data.get("value") is not None else []
        for job in job_lst:
            if job["JobType"]["Name"] == job_type_name:
                job_allowed = False
                available_jobs = job
                break
        else:
            job_allowed = True
            available_jobs = job_lst
        return job_allowed, available_jobs

    def _get_omam_ca_env(self):
        """Check if the value is set in REQUESTS_CA_BUNDLE or CURL_CA_BUNDLE or OMAM_CA_BUNDLE or returns None"""
        return os.environ.get("REQUESTS_CA_BUNDLE") or os.environ.get("CURL_CA_BUNDLE") or os.environ.get("OMAM_CA_BUNDLE")