""" Certain methods are not available via REST API, so we have to recreate!"""
import requests
from lxml.etree import Element, SubElement, tostring


class LeadConverter(object):

    def __init__(self, session_id, lead_id, **kwargs):
        """ Provides functionality for converting a Lead to a new or existing
        Account and create a new Contact or update an existing Contact.

        lead_id (REQUIRED): The 15 or 18-character ID of the Lead record to be
        converted.  All Salesforce Lead records begin with '00Q'

        converted_status (REQUIRED): A Salesforce admin-defined Status value
        that is set upon conversion.  Unfortunately there is no method for us
        to know what the valid converted_status values are, so we resort to
        trial and error.  When we find one that works, we must update the
        TableMetaData object for this user (where name="Lead", of course)

        account_id: Optional; if specified, converts the Lead to a Contact
        associated with this Account.

        contact_id: Optional; if specified, converts the Lead into an existing
        Contact record, preventing the creation of a duplicate.

        """

        self.session_id = session_id
        self.lead_id = lead_id
        self.converted_status = kwargs.get('converted_status', 'Qualified')
        self.account_id = kwargs.get('account_id', False)
        self.contact_id = kwargs.get('contact_id', False)
        self.do_not_create_opportunity = str(kwargs.get('do_not_create_opportunity', False))
        self.opportunity_name = kwargs.get('opportunity_name', False)
        self.owner_id = kwargs.get('owner_id', False)
        self.send_notification_email = str(kwargs.get('send_notification_email', False))

    def build_xml(self):
        schema_ns = 'http://schemas.xmlsoap.org/soap/envelope/'
        urn_ns = 'urn:partner.soap.sforce.com'
        S_PRE = '{' + schema_ns + '}'
        envelope = Element(
            S_PRE + 'Envelope',
            nsmap={'soapenv': schema_ns, 'urn': urn_ns}
            )
        header = SubElement(envelope, '{%s}Header' % schema_ns)
        s_header = SubElement(header, '{%s}SessionHeader' % urn_ns)
        sid = SubElement(s_header, '{%s}sessionId' % urn_ns).text=self.session_id
        body = SubElement(envelope, '{%s}Body' % schema_ns)
        convert_lead = SubElement(body, '{%s}convertLead' % urn_ns)
        lead_converts = SubElement(convert_lead, '{%s}leadConverts' % urn_ns)
        lead_id = SubElement(
            lead_converts,
            '{%s}leadId' % urn_ns
            ).text=self.lead_id
        do_not_create_opportunity = SubElement(
            lead_converts,
            '{%s}doNotCreateOpportunity' % urn_ns
            ).text=self.do_not_create_opportunity
        send_notification_email = SubElement(
            lead_converts,
            '{%s}sendNotificationEmail' % urn_ns
            ).text=self.send_notification_email

        if self.account_id:
            account_id = SubElement(
                lead_converts,
                '{%s}accountId' % urn_ns
                ).text=self.account_id
        if self.contact_id:
            contact_id = SubElement(
                lead_converts,
                '{%s}contactId' % urn_ns
                ).text=self.contact_id
        if self.converted_status:
            converted_status = SubElement(
                lead_converts,
                '{%s}convertedStatus' % urn_ns
                ).text=self.converted_status
        xml_meta = """<?xml version="1.1" encoding="utf-8"?>"""

        return xml_meta + tostring(envelope, encoding='utf-8')

    def post(self):
        xml = self.build_xml()
        headers = {'Content-Type':'text/xml', 'SOAPAction':'convertLead'}
        url = 'https://na16.salesforce.com/services/Soap/u/34.0'
        out = requests.post(url, data=xml, headers=headers)
        return out