##############################################################################
#
# Copyright (c) 2002, 2003, 2018 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Tests of ZConfig.loader classes and helper functions."""

import os
import os.path
import sys
import tempfile
import unittest
import urllib.request
from io import StringIO

import ZConfig
import ZConfig.loader
import ZConfig.url
from ZConfig.tests.support import CONFIG_BASE
from ZConfig.tests.support import TestHelper


myfile = os.path.abspath(__file__)
LIBRARY_DIR = os.path.join(os.path.dirname(myfile), "library")


class LoaderTestCase(TestHelper, unittest.TestCase):

    def test_open_resource_non_ascii(self):
        # Files are decoded using utf-8 on open
        loader = ZConfig.loader.SchemaLoader()
        url = ZConfig.url.urljoin(CONFIG_BASE, "non-ascii.txt")
        with loader.openResource(url) as stream:
            val = stream.read()
        self.assertEqual(
            val,
            f'# -*-coding: utf-8; mode: conf-*-{os.linesep}'
            f'This file contains a snowman, U+2603: \u2603{os.linesep}'
        )

    def test_schema_caching(self):
        loader = ZConfig.loader.SchemaLoader()
        url = ZConfig.url.urljoin(CONFIG_BASE, "simple.xml")
        schema1 = loader.loadURL(url)
        schema2 = loader.loadURL(url)
        self.assertIs(schema1, schema2)

    def test_simple_import_with_cache(self):
        loader = ZConfig.loader.SchemaLoader()
        url1 = ZConfig.url.urljoin(CONFIG_BASE, "library.xml")
        schema1 = loader.loadURL(url1)
        sio = StringIO("<schema>"
                       "  <import src='library.xml'/>"
                       "  <section type='type-a' name='section'/>"
                       "</schema>")
        url2 = ZConfig.url.urljoin(CONFIG_BASE, "stringio")
        schema2 = loader.loadFile(sio, url2)
        self.assertIs(schema1.gettype("type-a"), schema2.gettype("type-a"))

    def test_schema_loader_source_errors(self):
        loader = ZConfig.loader.SchemaLoader()
        self.assertRaisesRegex(ZConfig.SchemaError,
                               "illegal schema component name",
                               loader.schemaComponentSource,
                               '', None)
        self.assertRaisesRegex(ZConfig.SchemaError,
                               "illegal schema component name",
                               loader.schemaComponentSource,
                               'foo..bar', None)

    def test_config_loader_abstract_schema(self):

        class MockSchema:
            _abstract = True

            def isabstract(self):
                return self._abstract

            def gettype(self, _t):
                return self

        self.assertRaisesRegex(ZConfig.SchemaError,
                               "abstract type",
                               ZConfig.loader.ConfigLoader,
                               MockSchema())

        s = MockSchema()
        s._abstract = False

        loader = ZConfig.loader.ConfigLoader(s)
        s._abstract = True

        self.assertRaisesRegex(ZConfig.ConfigurationError,
                               "cannot match abstract section",
                               loader.startSection,
                               None, None, None)

    def test_simple_import_using_prefix(self):
        self.load_schema_text("""\
            <schema prefix='ZConfig.tests.library'>
              <import package='.thing'/>
            </schema>
            """)

    def test_import_errors(self):
        # must specify exactly one of package or src
        self.assertRaises(ZConfig.SchemaError, ZConfig.loadSchemaFile,
                          StringIO("<schema><import/></schema>"))
        self.assertRaises(ZConfig.SchemaError, ZConfig.loadSchemaFile,
                          StringIO("<schema>"
                                   "  <import src='library.xml'"
                                   "          package='ZConfig'/>"
                                   "</schema>"))
        # cannot specify src and file
        self.assertRaises(ZConfig.SchemaError, ZConfig.loadSchemaFile,
                          StringIO("<schema>"
                                   "  <import src='library.xml'"
                                   "          file='other.xml'/>"
                                   "</schema>"))
        # cannot specify module as package
        sio = StringIO("<schema>"
                       "  <import package='ZConfig.tests.test_loader'/>"
                       "</schema>")
        with self.assertRaises(ZConfig.SchemaResourceError) as ctx:
            ZConfig.loadSchemaFile(sio)

        e = ctx.exception
        self.assertEqual(e.filename, "component.xml")
        self.assertEqual(e.package, "ZConfig.tests.test_loader")
        self.assertIsNone(e.path)
        # make sure the str() doesn't raise an unexpected exception
        str(e)

    def test_import_from_package(self):
        loader = ZConfig.loader.SchemaLoader()
        sio = StringIO("<schema>"
                       "  <import package='ZConfig.tests.library.widget'/>"
                       "</schema>")
        schema = loader.loadFile(sio)
        self.assertIsNotNone(schema.gettype("widget-a"))

    def test_import_from_package_with_file(self):
        loader = ZConfig.loader.SchemaLoader()
        sio = StringIO("<schema>"
                       "  <import package='ZConfig.tests.library.widget'"
                       "          file='extra.xml' />"
                       "</schema>")
        schema = loader.loadFile(sio)
        self.assertIsNotNone(schema.gettype("extra-type"))

    def test_import_from_package_extra_directory(self):
        loader = ZConfig.loader.SchemaLoader()
        sio = StringIO("<schema>"
                       "  <import package='ZConfig.tests.library.thing'"
                       "          file='extras.xml' />"
                       "</schema>")
        schema = loader.loadFile(sio)
        self.assertIsNotNone(schema.gettype("extra-thing"))

    def test_import_from_package_with_missing_file(self):
        loader = ZConfig.loader.SchemaLoader()
        sio = StringIO("<schema>"
                       "  <import package='ZConfig.tests.library.widget'"
                       "          file='notthere.xml' />"
                       "</schema>")
        with self.assertRaises(ZConfig.SchemaResourceError) as ctx:
            loader.loadFile(sio)
        e = ctx.exception
        self.assertEqual(e.filename, "notthere.xml")
        self.assertEqual(e.package, "ZConfig.tests.library.widget")
        self.assertTrue(e.path)
        # make sure the str() doesn't raise an unexpected exception
        str(e)

    def test_import_from_package_with_directory_file(self):
        loader = ZConfig.loader.SchemaLoader()
        sio = StringIO("<schema>"
                       "  <import package='ZConfig.tests.library.widget'"
                       "          file='really/notthere.xml' />"
                       "</schema>")
        self.assertRaises(ZConfig.SchemaError, loader.loadFile, sio)

    def test_import_two_components_one_package(self):
        loader = ZConfig.loader.SchemaLoader()
        sio = StringIO("<schema>"
                       "  <import package='ZConfig.tests.library.widget' />"
                       "  <import package='ZConfig.tests.library.widget'"
                       "          file='extra.xml' />"
                       "</schema>")
        schema = loader.loadFile(sio)
        schema.gettype("widget-a")
        schema.gettype("extra-type")

    def test_import_component_twice_1(self):
        # Make sure we can import a component twice from a schema.
        # This is most likely to occur when the component is imported
        # from each of two other components, or from the top-level
        # schema and a component.
        loader = ZConfig.loader.SchemaLoader()
        sio = StringIO("<schema>"
                       "  <import package='ZConfig.tests.library.widget' />"
                       "  <import package='ZConfig.tests.library.widget' />"
                       "</schema>")
        schema = loader.loadFile(sio)
        schema.gettype("widget-a")

    def test_import_component_twice_2(self):
        # Make sure we can import a component from a config file even
        # if it has already been imported from the schema.
        loader = ZConfig.loader.SchemaLoader()
        sio = StringIO("<schema>"
                       "  <import package='ZConfig.tests.library.widget' />"
                       "</schema>")
        schema = loader.loadFile(sio)
        loader = ZConfig.loader.ConfigLoader(schema)
        sio = StringIO("%import ZConfig.tests.library.widget")
        loader.loadFile(sio)

    def test_file_url_normalization(self):
        self.assertEqual(
            ZConfig.url.urlnormalize("file:/abc/def"),
            "file:///abc/def")
        self.assertEqual(
            ZConfig.url.urlunsplit(("file", "", "/abc/def", "", "")),
            "file:///abc/def")
        self.assertEqual(
            ZConfig.url.urljoin("file:/abc/", "def"),
            "file:///abc/def")
        self.assertEqual(
            ZConfig.url.urldefrag("file:/abc/def#frag"),
            ("file:///abc/def", "frag"))

    def test_url_from_file(self):
        class MockFile:
            name = 'path'
        self.assertEqual('file://',
                         ZConfig.loader._url_from_file(MockFile)[:7])

    def test_isPath(self):
        assertTrue = self.assertTrue
        isPath = ZConfig.loader.SchemaLoader().isPath
        assertTrue(isPath("abc"))
        assertTrue(isPath("abc/def"))
        assertTrue(isPath("/abc"))
        assertTrue(isPath("/abc/def"))
        assertTrue(isPath(r"\abc"))
        assertTrue(isPath(r"\abc\def"))
        assertTrue(isPath(r"c:\abc\def"))
        assertTrue(isPath("/ab:cd"))
        assertTrue(isPath(r"\ab:cd"))
        assertTrue(isPath("long name with spaces"))
        assertTrue(isPath("long name:with spaces"))
        assertTrue(not isPath("ab:cd"))
        assertTrue(not isPath("http://www.example.com/"))
        assertTrue(not isPath("http://www.example.com/sample.conf"))
        assertTrue(not isPath("file:///etc/zope/zope.conf"))
        assertTrue(not isPath("file:///c|/foo/bar.conf"))


class TestNonExistentResources(unittest.TestCase):

    # XXX Not sure if this is the best approach for these.  These
    # tests make sure that the error reported by ZConfig for missing
    # resources is handled in a consistent way.  Since ZConfig uses
    # urllib2.urlopen() for opening all resources, what we do is
    # replace that function with one that always raises an exception.
    # Since urllib2.urlopen() can raise either IOError or OSError
    # (depending on the version of Python), we run test for each
    # exception.  urllib2.urlopen() is restored after running the
    # test.

    def setUp(self):
        self.urllib2_urlopen = urllib.request.urlopen
        urllib.request.urlopen = self.fake_urlopen

    def tearDown(self):
        urllib.request.urlopen = self.urllib2_urlopen

    def fake_urlopen(self, url):
        raise self.error()

    def test_nonexistent_file_ioerror(self):
        self.error = IOError
        self.check_nonexistent_file()

    def test_nonexistent_file_oserror(self):
        self.error = OSError
        self.check_nonexistent_file()

    def check_nonexistent_file(self):
        fn = tempfile.mktemp()
        schema = ZConfig.loadSchemaFile(StringIO("<schema/>"))
        self.assertRaises(ZConfig.ConfigurationError,
                          ZConfig.loadSchema, fn)
        self.assertRaises(ZConfig.ConfigurationError,
                          ZConfig.loadConfig, schema, fn)
        self.assertRaises(ZConfig.ConfigurationError,
                          ZConfig.loadConfigFile, schema,
                          StringIO("%include " + fn))
        self.assertRaises(ZConfig.ConfigurationError,
                          ZConfig.loadSchema,
                          "http://www.zope.org/no-such-document/")
        self.assertRaises(ZConfig.ConfigurationError,
                          ZConfig.loadConfig, schema,
                          "http://www.zope.org/no-such-document/")


class TestResourcesInZip(unittest.TestCase):

    def setUp(self):
        self.old_path = sys.path[:]
        # now add our sample EGG to sys.path:
        zipfile = os.path.join(os.path.dirname(myfile), "foosample.zip")
        sys.path.append(zipfile)

    def tearDown(self):
        sys.path[:] = self.old_path

    def test_zip_import_component_from_schema(self):
        sio = StringIO('''
            <schema>
              <abstracttype name="something"/>
              <import package="foo.sample"/>
              <section name="*"
                       attribute="something"
                       type="something"
                       />
            </schema>
            ''')
        schema = ZConfig.loadSchemaFile(sio)
        t = schema.gettype("sample")
        self.assertFalse(t.isabstract())

    def test_zip_import_component_from_config(self):
        sio = StringIO('''
            <schema>
              <abstracttype name="something"/>
              <section name="*"
                       attribute="something"
                       type="something"
                       />
            </schema>
            ''')
        schema = ZConfig.loadSchemaFile(sio)

        value = '''
            %import foo.sample
            <sample>
              data value
            </sample>
            '''
        sio = StringIO(value)
        config, _ = ZConfig.loadConfigFile(schema, sio)
        self.assertEqual(config.something.data, "| value |")

        sio = StringIO(value)
        with self.assertRaises(ZConfig.ConfigurationSyntaxError):
            ZConfig.loadConfigFile(schema, sio,
                                   overrides=["sample/data=othervalue"])


class TestOpenPackageResource(TestHelper, unittest.TestCase):

    magic_name = 'not a valid import name'

    def setUp(self):
        sys.modules[self.magic_name] = self

    def tearDown(self):
        del sys.modules[self.magic_name]

    def test_package_loader_resource_error(self):
        class MockLoader:
            pass
        self.__loader__ = MockLoader()
        self.__path__ = ['dir']

        self.assertRaisesRegex(ZConfig.SchemaResourceError,
                               "error opening schema component",
                               ZConfig.loader.openPackageResource,
                               self.magic_name, 'a path')

        # Now with an empty path
        self.__path__ = []
        self.assertRaisesRegex(ZConfig.SchemaResourceError,
                               "schema component not found",
                               ZConfig.loader.openPackageResource,
                               self.magic_name, 'a path')

    def test_resource(self):
        r = ZConfig.loader.Resource(self, None)
        self.assertEqual(self.magic_name, r.magic_name)
