from lti import ToolConfig, InvalidLTIConfigError
from lxml import etree
import unittest

CC_LTI_XML = b'''<?xml version="1.0" encoding="UTF-8"?>
<cartridge_basiclti_link xmlns:blti="http://www.imsglobal.org/xsd/imsbasiclti_v1p0" xmlns:lticm="http://www.imsglobal.org/xsd/imslticm_v1p0" xmlns:lticp="http://www.imsglobal.org/xsd/imslticp_v1p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.imsglobal.org/xsd/imslticc_v1p0" xsi:schemaLocation="http://www.imsglobal.org/xsd/imslticc_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticc_v1p0.xsd http://www.imsglobal.org/xsd/imsbasiclti_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imsbasiclti_v1p0p1.xsd http://www.imsglobal.org/xsd/imslticm_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticm_v1p0.xsd http://www.imsglobal.org/xsd/imslticp_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticp_v1p0.xsd">
    <blti:title>Test Config</blti:title>
    <blti:description>Description of boringness</blti:description>
    <blti:launch_url>http://www.example.com/lti</blti:launch_url>
    <blti:secure_launch_url>https://www.example.com/lti</blti:secure_launch_url>
    <blti:vendor>
        <lticp:name>test.tool</lticp:name>
        <lticp:code>test</lticp:code>
        <lticp:description>We test things</lticp:description>
        <lticp:url>http://www.example.com/about</lticp:url>
        <lticp:contact>
            <lticp:name>Joe Support</lticp:name>
            <lticp:email>support@example.com</lticp:email>
        </lticp:contact>
    </blti:vendor>
    <blti:custom>
        <lticm:property name="custom1">customval1</lticm:property>
        <lticm:property name="custom2">customval2</lticm:property>
    </blti:custom>
    <blti:extensions platform="example.com">
        <lticm:property name="extkey1">extval1</lticm:property>
        <lticm:property name="extkey2">extval2</lticm:property>
        <lticm:options name="extopt1">
            <lticm:property name="optkey1">optval1</lticm:property>
            <lticm:property name="optkey2">optval2</lticm:property>
        </lticm:options>
    </blti:extensions>
    <blti:extensions platform="two.example.com">
        <lticm:property name="ext1key">ext1val</lticm:property>
    </blti:extensions>
    <cartridge_bundle identifierref="BLTI001_Bundle"/>
</cartridge_basiclti_link>
'''

CC_LTI_WITH_SUBOPTIONS_XML = b'''<?xml version="1.0" encoding="UTF-8"?>
<cartridge_basiclti_link xmlns:blti="http://www.imsglobal.org/xsd/imsbasiclti_v1p0" xmlns:lticm="http://www.imsglobal.org/xsd/imslticm_v1p0" xmlns:lticp="http://www.imsglobal.org/xsd/imslticp_v1p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.imsglobal.org/xsd/imslticc_v1p0" xsi:schemaLocation="http://www.imsglobal.org/xsd/imslticc_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticc_v1p0.xsd http://www.imsglobal.org/xsd/imsbasiclti_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imsbasiclti_v1p0p1.xsd http://www.imsglobal.org/xsd/imslticm_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticm_v1p0.xsd http://www.imsglobal.org/xsd/imslticp_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticp_v1p0.xsd">
    <blti:title>Test Config</blti:title>
    <blti:description>Description of boringness</blti:description>
    <blti:launch_url>http://www.example.com/lti</blti:launch_url>
    <blti:secure_launch_url>https://www.example.com/lti</blti:secure_launch_url>
    <blti:vendor>
        <lticp:name>test.tool</lticp:name>
        <lticp:code>test</lticp:code>
        <lticp:description>We test things</lticp:description>
        <lticp:url>http://www.example.com/about</lticp:url>
        <lticp:contact>
            <lticp:name>Joe Support</lticp:name>
            <lticp:email>support@example.com</lticp:email>
        </lticp:contact>
    </blti:vendor>
    <blti:custom>
        <lticm:property name="custom1">customval1</lticm:property>
        <lticm:property name="custom2">customval2</lticm:property>
    </blti:custom>
    <blti:extensions platform="example.com">
        <lticm:property name="extkey1">extval1</lticm:property>
        <lticm:property name="extkey2">extval2</lticm:property>
        <lticm:options name="extopt1">
            <lticm:options name="labels">
                <lticm:property name="en">Image Library</lticm:property>
                <lticm:property name="es">Biblioteca de Imagenes</lticm:property>
            </lticm:options>
        </lticm:options>
    </blti:extensions>
    <blti:extensions platform="two.example.com">
        <lticm:property name="ext1key">ext1val</lticm:property>
    </blti:extensions>
    <cartridge_bundle identifierref="BLTI001_Bundle"/>
</cartridge_basiclti_link>
'''

CC_LTI_OPTIONAL_PARAMS_XML = b'''<?xml version="1.0" encoding="UTF-8"?>
<cartridge_basiclti_link xmlns:blti="http://www.imsglobal.org/xsd/imsbasiclti_v1p0" xmlns:lticm="http://www.imsglobal.org/xsd/imslticm_v1p0" xmlns:lticp="http://www.imsglobal.org/xsd/imslticp_v1p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.imsglobal.org/xsd/imslticc_v1p0" xsi:schemaLocation="http://www.imsglobal.org/xsd/imslticc_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticc_v1p0.xsd http://www.imsglobal.org/xsd/imsbasiclti_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imsbasiclti_v1p0p1.xsd http://www.imsglobal.org/xsd/imslticm_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticm_v1p0.xsd http://www.imsglobal.org/xsd/imslticp_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticp_v1p0.xsd">
  <blti:title>Test config</blti:title>
  <blti:description/>
  <blti:launch_url>http://www.example.com</blti:launch_url>
  <blti:secure_launch_url>http://www.example.com</blti:secure_launch_url>
  <blti:icon>http://wil.to/_/beardslap.gif</blti:icon>
  <blti:secure_icon>https://www.example.com/secure_icon.png</blti:secure_icon>
  <blti:vendor/>
  <cartridge_icon identifierref="BLTI001_Icon"/>
</cartridge_basiclti_link>
'''

def normalize_xml(xml_str):
    parser = etree.XMLParser(remove_blank_text=True)
    root = etree.XML(xml_str, parser)
    return etree.tostring(root, with_tail=False)

class TestToolConfig(unittest.TestCase):

    def test_generate_xml(self):
        '''
        Should generate the expected config xml.
        '''
        config = ToolConfig(title = "Test Config",
                secure_launch_url = "https://www.example.com/lti",
                custom_params = {"custom1": "customval1"})
        config.description ='Description of boringness'
        config.launch_url = 'http://www.example.com/lti'
        config.vendor_code = 'test'
        config.vendor_name = 'test.tool'
        config.vendor_description = 'We test things'
        config.vendor_url = 'http://www.example.com/about'
        config.vendor_contact_email = 'support@example.com'
        config.vendor_contact_name = 'Joe Support'

        config.set_custom_param('custom2', 'customval2')

        config.set_ext_params('example.com', { 'extkey1': 'extval1' })
        config.set_ext_param('example.com', 'extkey2', 'extval2')
        config.set_ext_param('example.com', 'extopt1',
                { 'optkey1': 'optval1', 'optkey2': 'optval2' })
        config.set_ext_param('two.example.com', 'ext1key', 'ext1val')

        config.cartridge_bundle = 'BLTI001_Bundle'

        correct = normalize_xml(CC_LTI_XML)
        got = normalize_xml(config.to_xml())
        self.assertEqual(got, correct)

    def test_allow_suboptions(self):

        config = ToolConfig(title = "Test Config",
                secure_launch_url = "https://www.example.com/lti",
                custom_params = {"custom1": "customval1"})
        config.description ='Description of boringness'
        config.launch_url = 'http://www.example.com/lti'
        config.vendor_code = 'test'
        config.vendor_name = 'test.tool'
        config.vendor_description = 'We test things'
        config.vendor_url = 'http://www.example.com/about'
        config.vendor_contact_email = 'support@example.com'
        config.vendor_contact_name = 'Joe Support'

        config.set_custom_param('custom2', 'customval2')

        config.set_ext_params('example.com', { 'extkey1': 'extval1' })
        config.set_ext_param('example.com', 'extkey2', 'extval2')
        config.set_ext_param('example.com', 'extopt1',
                { 'optkey1': 'optval1', 'optkey2': 'optval2' })
        config.set_ext_param('example.com', 'extopt1',
                { 'labels':{
                    'en':'Image Library',
                    'es':'Biblioteca de Imagenes'
                    }
                })
        config.set_ext_param('two.example.com', 'ext1key', 'ext1val')

        config.cartridge_bundle = 'BLTI001_Bundle'

        correct = normalize_xml(CC_LTI_WITH_SUBOPTIONS_XML)
        got = normalize_xml(config.to_xml())
        self.assertEqual(got, correct)

    def test_optional_config_parameters(self):
        '''
        Should contain cartridge_icon, and blti:icon.
        '''
        config = ToolConfig(title = "Test config",
                launch_url = "http://www.example.com",
                secure_launch_url = "http://www.example.com")
        config.icon = 'http://wil.to/_/beardslap.gif'
        config.secure_icon = 'https://www.example.com/secure_icon.png'
        config.cartridge_icon = 'BLTI001_Icon'

        correct = normalize_xml(CC_LTI_OPTIONAL_PARAMS_XML)
        got = normalize_xml(config.to_xml())
        self.assertEqual(got, correct)

    def test_can_parse_optional_config_parameters(self):
        '''
        Config should have cartridge_icon and blti:icon set
        '''
        config = ToolConfig.create_from_xml(CC_LTI_OPTIONAL_PARAMS_XML)
        self.assertEqual(config.cartridge_icon, 'BLTI001_Icon')
        self.assertEqual(config.icon, 'http://wil.to/_/beardslap.gif')
        self.assertEqual(config.secure_icon, 'https://www.example.com/secure_icon.png')

    def test_read_xml_config(self):
        '''
        Should read an XML config.
        '''
        config = ToolConfig.create_from_xml(CC_LTI_XML)
        self.assertEqual(normalize_xml(config.to_xml()), normalize_xml(CC_LTI_XML))

    def test_invalid_config_xml(self):
        '''
        Should not allow creating invalid config xml.
        '''
        config = ToolConfig(title = 'Test Config')
        self.assertRaises(InvalidLTIConfigError, config.to_xml)