#!/usr/bin/env python3

import requests
import urllib.request
from urllib3.exceptions import InsecureRequestWarning
import json
import secrets
import string

from robot.api import logger
from robot.libraries.BuiltIn import BuiltIn
from robot.api.deco import keyword


class redfish_request(object):

    @staticmethod
    def generate_clientid():
        r"""
        Generate 10 character unique id.

        e.g. "oMBhLv2Q9e"

        """

        clientid = ''.join(secrets.choice(
            string.ascii_letters + string.digits) for i in range(10))
        clientid = ''.join(str(i) for i in clientid)

        return clientid

    @staticmethod
    def form_url(url):
        r"""
        Form a complete path for user url.

        Description of argument(s):
        url        Url passed by user e.g. /redfish/v1/Systems/system.
        """

        openbmc_host = \
            BuiltIn().get_variable_value("${OPENBMC_HOST}", default="")
        https_port = BuiltIn().get_variable_value("${HTTPS_PORT}", default="")
        form_url = \
            "https://" + str(openbmc_host) + ":" + str(https_port) + str(url)

        return form_url

    @staticmethod
    def log_console(response):
        r"""
        Print function for console.

        Description of argument(s):
        response        Response from requests.
        """

        logger.console(msg='', newline=True)
        logger.info("Response : [%s]" % response.status_code,
                    also_console=True)
        logger.console(msg='', newline=True)

    def request_login(self, headers, url, credential, timeout=10):
        r"""
        Redfish request to create a session.

        Description of argument(s):
        headers           By default headers is assigned as application/json.
                          If user assign the headers,
                          then default headers is not considered.
        url               Requested path from user.
        credential        User has to assign the credential like username and
                          password.
                          UserName = xxxxxxxx Password = xxxxxxxx
                          Client id, user need to assign None in order to auto
                          generate, else user can assign any value.
        timeout           By default timeout is set to 10 seconds.
                          If user assign the timeout, then default timeout
                          value is not considered.
        """

        if headers == "None":
            headers = dict()
            headers['Content-Type'] = 'application/json'

        client_id = credential['Oem']['OpenBMC'].get('ClientID', "None")

        if "None" == client_id:
            self.clientid = redfish_request.generate_clientid()
            credential['Oem']['OpenBMC']['ClientID'] = self.clientid

        logger.console(msg='', newline=True)
        requests.packages.urllib3.\
            disable_warnings(category=InsecureRequestWarning)
        response = redfish_request.request_post(self, headers=headers,
                                                url=url, data=credential)

        return response

    def request_get(self, headers, url, timeout=10, verify=False):
        r"""
        Redfish get request.

        Description of argument(s):
        headers        By default headers is assigned as application/json.
                       If user assign the headers, then default headers is not
                       considered.
        url            Requested path from user.
        timeout        By default timeout is set to 10 seconds.
                       If user assign the timeout, then default timeout value
                       is not considered.
        verify         By default verify is set to false means no certificate
                       verification is performed
                       else in case of true, certificate needs to be verified.
                       If user assign the verify, then default verify value
                       is not considered.
        """

        if headers.get('Content-Type', None) is None:
            headers['Content-Type'] = 'application/json'

        url = redfish_request.form_url(url)

        logger.console(msg='', newline=True)
        msg = "Request Method : GET  ,headers = " + \
              json.dumps(headers) + " ,uri = " + str(url) + " ,timeout = " + \
              str(timeout) + " ,verify = " + str(verify)
        logger.info(msg, also_console=True)

        response = requests.get(url, headers=headers,
                                timeout=timeout, verify=verify)
        redfish_request.log_console(response)

        return response

    def request_patch(self, headers, url, data=None, timeout=10, verify=False):
        r"""
        Redfish patch request.

        Description of argument(s):
        headers        By default headers is assigned as application/json.
                       If user assign the headers, then default headers is not
                       considered.
        url            Requested path from user.
        data           By default data is None.
                       If user assign the data, then default data value is not
                       considered.
        timeout        By default timeout is set to 10 seconds.
                       If user assign the timeout, then default timeout value
                       is not considered.
        verify         By default verify is set to false means no certificate
                       verification is performed
                       else in case of true, certificate needs to be verified.
                       If user assign the verify, then default verify value
                       is not considered.
        """

        if headers.get('Content-Type', None) is None:
            headers['Content-Type'] = 'application/json'

        url = redfish_request.form_url(url)

        logger.console(msg='', newline=True)
        msg = "Request Method : PATCH  ,headers = " + \
              json.dumps(headers) + " ,uri = " + str(url) + " ,data = " + \
              json.dumps(data) + " ,timeout = " + str(timeout) + \
              " ,verify = " + str(verify)
        logger.info(msg, also_console=True)

        response = requests.patch(url, headers=headers, data=data,
                                  timeout=timeout, verify=verify)
        redfish_request.log_console(response)

        return response

    def request_post(self, headers, url, data=None, timeout=10, verify=False):
        r"""
        Redfish post request.

        Description of argument(s):
        headers        By default headers is assigned as application/json.
                       If user assign the headers, then default headers is not
                       considered.
        url            Requested path from user.
        data           By default data is None.
                       If user assign the data, then default data value is not
                       considered.
        timeout        By default timeout is set to 10 seconds.
                       If user assign the timeout, then default timeout value
                       is not considered.
        verify         By default verify is set to false means no
                       certificate verification is performed
                       else in case of true, certificate needs to be verified.
                       If user assign the verify, then default verify value
                       is not considered.
        """

        if headers.get('Content-Type', None) is None:
            headers['Content-Type'] = 'application/json'

        url = redfish_request.form_url(url)

        logger.console(msg='', newline=True)
        msg = "Request Method : POST  ,headers = " + \
              json.dumps(headers) + " ,uri = " + str(url) + " ,data = " + \
              json.dumps(data) + " ,timeout = " + str(timeout) + \
              " ,verify = " + str(verify)
        logger.info(msg, also_console=True)

        response = requests.post(url, headers=headers, data=json.dumps(data),
                                 timeout=timeout, verify=verify)
        redfish_request.log_console(response)

        return response

    def request_put(self, headers, url, files=None, data=None,
                    timeout=10, verify=False):
        r"""
        Redfish put request.

        Description of argument(s):
        headers        By default headers is assigned as application/json.
                       If user assign the headers, then default headers is not
                       considered.
        url            Requested path from user.
        files          By default files is None.
                       If user assign the files, then default files value
                       is not considered.
        data           By default data is None.
                       If user pass the data, then default data value is not
                       considered.
        timeout        By default timeout is set to 10 seconds.
                       If user pass the timeout, then default timeout value
                       is not considered.
        verify         By default verify is set to false means no
                       certificate verification is performed
                       else in case of true, certificate needs to be verified.
                       If user assign the verify, then default verify value
                       is not considered.
        """

        if headers.get('Content-Type', None) is None:
            headers['Content-Type'] = 'application/json'

        url = redfish_request.form_url(url)

        logger.console(msg='', newline=True)
        msg = "Request Method : PUT  ,headers = " + \
              json.dumps(headers) + " ,uri = " + str(url) + " ,data = " + \
              json.dumps(data) + " ,timeout = " + str(timeout) + \
              " ,verify = " + str(verify)
        logger.info(msg, also_console=True)

        response = requests.put(url, headers=headers, files=files, data=data,
                                timeout=timeout, verify=verify)
        redfish_request.log_console(response)

        return response

    def request_delete(self, headers, url, data=None, timeout=10, verify=False):
        r"""
        Redfish delete request.

        Description of argument(s):
        headers        By default headers is assigned as application/json.
                       If user pass the headers then default header is not
                       considered.
        url            Requested path from user.
        data           By default data is None.
                       If user pass the data, then default data value is not
                       considered.
        timeout        By default timeout is set to 10 seconds.
                       If user pass the timeout, then default timeout value
                       is not considered.
        verify         By default verify is set to false means no
                       certificate verification is performed
                       else in case of true, certificate needs to be verified.
                       If user assign the verify, then default verify value
                       is not considered.
        """

        if headers.get('Content-Type', None) is None:
            headers['Content-Type'] = 'application/json'

        url = redfish_request.form_url(url)

        logger.console(msg='', newline=True)
        msg = "Request Method : DELETE  ,headers = " + \
              json.dumps(headers) + " ,uri = " + str(url) + " ,data = " + \
              json.dumps(data) + " ,timeout = " + str(timeout) + \
              " ,verify = " + str(verify)
        logger.console(msg='', newline=True)

        response = requests.delete(url, headers=headers, data=data,
                                   timeout=timeout, verify=verify)
        redfish_request.log_console(response)

        return response

    @staticmethod
    def dict_parse(variable, lookup_dict):
        r"""
        Find a variable in dict.

        Description of argument(s):
        variable           Variable that need to be searched in dict.
        lookup_dict        Disctionay contains variables.
        """

        result = lookup_dict.get(variable, None)
        return result

    @staticmethod
    def get_target_actions(target_attribute, response):
        r"""
        Get target entry of the searched target attribute.

        Description of argument(s):
        target_attribute        Name of the attribute (e.g. 'Manager.Reset').
        response                Response from url.

        'Actions' : {
        '#Manager.Reset' : {
        '@Redfish.ActionInfo' : '/redfish/v1/Managers/bmc/ResetActionInfo',
        'target' : '/redfish/v1/Managers/bmc/Actions/Manager.Reset'
        }
        }
        """

        lookup_list = ["Actions", "#" + attribute, "target"]
        for lookup_item in lookup_list:
            response = redfish_request.dict_parse(lookup_item, response)
            if response is not None and type(response) is dict():
                continue
        else:
            return response
        return None

    @staticmethod
    def get_attribute(attribute, data):
        r"""
        Get resource attribute.

        Description of argument(s):
        attribute        Pass the attribute needs to be searched.
        data             Pass the request response.
        """

        value = data.get(attribute, None)
        return value