#!/usr/bin/env python
# -*- coding: utf-8 -*-

# The MIT License
#
# Copyright 2012 Sony Mobile Communications. All rights reserved.
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# The above copyright notice and this permission notice shall be included in
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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"""Unit tests for the Pygerrit2 helper methods."""

import re
import unittest

from mock import patch
from pygerrit2 import GerritReviewMessageFormatter, GerritReview
from pygerrit2 import HTTPBasicAuthFromNetrc, HTTPDigestAuthFromNetrc
from pygerrit2 import GerritRestAPI

EXPECTED_TEST_CASE_FIELDS = ['header', 'footer', 'paragraphs', 'result']


TEST_CASES = [
    {'header': None,
     'footer': None,
     'paragraphs': [],
     'result': ""},
    {'header': "Header",
     'footer': "Footer",
     'paragraphs': [],
     'result': ""},
    {'header': None,
     'footer': None,
     'paragraphs': ["Test"],
     'result': "Test"},
    {'header': None,
     'footer': None,
     'paragraphs': ["Test", "Test"],
     'result': "Test\n\nTest"},
    {'header': "Header",
     'footer': None,
     'paragraphs': ["Test"],
     'result': "Header\n\nTest"},
    {'header': "Header",
     'footer': None,
     'paragraphs': ["Test", "Test"],
     'result': "Header\n\nTest\n\nTest"},
    {'header': "Header",
     'footer': "Footer",
     'paragraphs': ["Test", "Test"],
     'result': "Header\n\nTest\n\nTest\n\nFooter"},
    {'header': "Header",
     'footer': "Footer",
     'paragraphs': [["One"]],
     'result': "Header\n\n* One\n\nFooter"},
    {'header': "Header",
     'footer': "Footer",
     'paragraphs': [["One", "Two"]],
     'result': "Header\n\n* One\n* Two\n\nFooter"},
    {'header': "Header",
     'footer': "Footer",
     'paragraphs': ["Test", ["One"], "Test"],
     'result': "Header\n\nTest\n\n* One\n\nTest\n\nFooter"},
    {'header': "Header",
     'footer': "Footer",
     'paragraphs': ["Test", ["One", "Two"], "Test"],
     'result': "Header\n\nTest\n\n* One\n* Two\n\nTest\n\nFooter"},
    {'header': "Header",
     'footer': "Footer",
     'paragraphs': ["Test", "Test", ["One"]],
     'result': "Header\n\nTest\n\nTest\n\n* One\n\nFooter"},
    {'header': None,
     'footer': None,
     'paragraphs': [["* One", "* Two"]],
     'result': "* One\n* Two"},
    {'header': None,
     'footer': None,
     'paragraphs': [["*    One  ", "    * Two  "]],
     'result': "* One\n* Two"},
    {'header': None,
     'footer': None,
     'paragraphs': [["*", "*"]],
     'result': ""},
    {'header': None,
     'footer': None,
     'paragraphs': [["", ""]],
     'result': ""},
    {'header': None,
     'footer': None,
     'paragraphs': [["  ", "  "]],
     'result': ""},
    {'header': None,
     'footer': None,
     'paragraphs': [["* One", "  ", "* Two"]],
     'result': "* One\n* Two"}]


class TestGerritReviewMessageFormatter(unittest.TestCase):
    """Test that the GerritReviewMessageFormatter class behaves properly."""

    def _check_test_case_fields(self, test_case, i):
        for field in EXPECTED_TEST_CASE_FIELDS:
            self.assertTrue(field in test_case,
                            "field '%s' not present in test case #%d" %
                            (field, i))
        self.assertTrue(
            isinstance(test_case['paragraphs'], list),
            "'paragraphs' field is not a list in test case #%d" % i)

    def test_is_empty(self):
        """Test if message is empty for missing header and footer."""
        fmt = GerritReviewMessageFormatter(header=None, footer=None)
        self.assertTrue(fmt.is_empty())
        fmt.append(['test'])
        self.assertFalse(fmt.is_empty())

    def test_message_formatting(self):
        """Test message formatter for different test cases."""
        for i, test_case in enumerate(TEST_CASES):
            self._check_test_case_fields(test_case, i)
            fmt = GerritReviewMessageFormatter(header=test_case['header'],
                                               footer=test_case['footer'])
            for paragraph in test_case['paragraphs']:
                fmt.append(paragraph)
            msg = fmt.format()
            self.assertEqual(msg, test_case['result'],
                             "Formatted message does not match expected "
                             "result in test case #%d:\n[%s]" % (i, msg))


class TestGerritReview(unittest.TestCase):
    """Test that the GerritReview class behaves properly."""

    def test_str(self):
        """Test for str function."""
        obj = GerritReview()
        self.assertEqual(str(obj), '{}')

        obj2 = GerritReview(labels={'Verified': 1, 'Code-Review': -1})
        self.assertEqual(
            str(obj2),
            '{"labels": {"Code-Review": -1, "Verified": 1}}')

        obj3 = GerritReview(comments=[{'filename': 'Makefile',
                                       'line': 10, 'message': 'test'}])
        self.assertEqual(
            str(obj3),
            '{"comments": {"Makefile": [{"line": 10, "message": "test"}]}}')

        obj4 = GerritReview(labels={'Verified': 1, 'Code-Review': -1},
                            comments=[{'filename': 'Makefile', 'line': 10,
                                       'message': 'test'}])
        self.assertEqual(
            str(obj4),
            '{"comments": {"Makefile": [{"line": 10, "message": "test"}]},'
            ' "labels": {"Code-Review": -1, "Verified": 1}}')

        obj5 = GerritReview(comments=[
            {'filename': 'Makefile', 'line': 15, 'message': 'test'},
            {'filename': 'Make', 'line': 10, 'message': 'test1'}
        ])
        self.assertEqual(
            str(obj5),
            '{"comments": {"Make": [{"line": 10, "message": "test1"}],'
            ' "Makefile": [{"line": 15, "message": "test"}]}}')


class TestNetrcAuth(unittest.TestCase):
    """Test that netrc authentication works."""

    def test_basic_auth_from_netrc(self):
        """Test that the HTTP basic auth is taken from netrc."""
        with patch('pygerrit2.rest.auth._get_netrc_auth') as mock_netrc:
            mock_netrc.return_value = ("netrcuser", "netrcpass")
            auth = HTTPBasicAuthFromNetrc(url="http://review.example.com")
            assert auth.username == "netrcuser"
            assert auth.password == "netrcpass"

    def test_digest_auth_from_netrc(self):
        """Test that the HTTP digest auth is taken from netrc."""
        with patch('pygerrit2.rest.auth._get_netrc_auth') as mock_netrc:
            mock_netrc.return_value = ("netrcuser", "netrcpass")
            auth = HTTPDigestAuthFromNetrc(url="http://review.example.com")
            assert auth.username == "netrcuser"
            assert auth.password == "netrcpass"

    def test_basic_auth_from_netrc_fails(self):
        """Test that an exception is raised when credentials are not found."""
        with self.assertRaises(ValueError) as exc:
            HTTPBasicAuthFromNetrc(url="http://review.example.com")
        assert str(exc.exception) == \
            "netrc missing or no credentials found in netrc"

    def test_digest_auth_from_netrc_fails(self):
        """Test that an exception is raised when credentials are not found."""
        with self.assertRaises(ValueError) as exc:
            HTTPDigestAuthFromNetrc(url="http://review.example.com")
        assert str(exc.exception) == \
            "netrc missing or no credentials found in netrc"

    def test_default_to_basic_auth_from_netrc(self):
        """Test auth defaults to HTTP basic from netrc when not specified."""
        with patch('pygerrit2.rest.auth._get_netrc_auth') as mock_netrc:
            mock_netrc.return_value = ("netrcuser", "netrcpass")
            api = GerritRestAPI(url="http://review.example.com")
            assert isinstance(api.auth, HTTPBasicAuthFromNetrc)
            assert api.url.endswith("/a/")

    def test_default_to_no_auth_when_not_in_netrc(self):
        """Test auth defaults to none when not specified and not in netrc."""
        with patch('pygerrit2.rest.auth._get_netrc_auth') as mock_netrc:
            mock_netrc.return_value = None
            api = GerritRestAPI(url="http://review.example.com")
            assert api.auth is None
            assert not api.url.endswith("/a/")

    def test_invalid_auth_type(self):
        """Test that an exception is raised for invalid auth type."""
        with self.assertRaises(ValueError) as exc:
            GerritRestAPI(url="http://review.example.com", auth="foo")
        assert re.search(r'Invalid auth type', str(exc.exception))


class TestKwargsTranslation(unittest.TestCase):
    """Test that kwargs translation works."""

    def test_data_and_json(self):
        """Test that `json` and `data` cannot be used at the same time."""
        api = GerritRestAPI(url="http://review.example.com")
        with self.assertRaises(ValueError) as exc:
            api.translate_kwargs(data="d", json="j")
        assert re.search(r'Cannot use data and json together',
                         str(exc.exception))

    def test_data_as_dict_converts_to_json_and_header_added(self):
        """Test that `data` dict is converted to `json`.

        Also test that a Content-Type header is added.
        """
        api = GerritRestAPI(url="http://review.example.com")
        data = {"a": "a"}
        result = api.translate_kwargs(data=data)
        assert "json" in result
        assert "data" not in result
        assert "headers" in result
        headers = result["headers"]
        assert "Content-Type" in headers
        assert result["json"] == {"a": "a"}
        assert headers["Content-Type"] == "application/json;charset=UTF-8"

    def test_json_is_unchanged_and_header_added(self):
        """Test that `json` is unchanged and a Content-Type header is added."""
        api = GerritRestAPI(url="http://review.example.com")
        json = {"a": "a"}
        result = api.translate_kwargs(json=json)
        assert "json" in result
        assert "data" not in result
        assert "headers" in result
        headers = result["headers"]
        assert "Content-Type" in headers
        assert result["json"] == {"a": "a"}
        assert headers["Content-Type"] == "application/json;charset=UTF-8"

    def test_json_no_side_effect_on_subsequent_call(self):
        """Test that subsequent call is not polluted with results of previous.

        If the translate_kwargs method is called, resulting in the content-type
        header being added, the header should not also be added on a subsequent
        call that does not need it.
        """
        api = GerritRestAPI(url="http://review.example.com")
        json = {"a": "a"}
        result = api.translate_kwargs(json=json)
        assert "json" in result
        assert "data" not in result
        assert "headers" in result
        headers = result["headers"]
        assert "Content-Type" in headers
        assert result["json"] == {"a": "a"}
        assert headers["Content-Type"] == "application/json;charset=UTF-8"
        kwargs = {"a": "a", "b": "b"}
        result = api.translate_kwargs(**kwargs)
        assert "json" not in result
        assert "data" not in result
        assert "a" in result
        assert "b" in result
        assert "headers" in result
        headers = result["headers"]
        assert "Content-Type" not in headers

    def test_kwargs_unchanged_when_no_data_or_json(self):
        """Test that `json` or `data` are not added when not passed."""
        api = GerritRestAPI(url="http://review.example.com")
        kwargs = {"a": "a", "b": "b"}
        result = api.translate_kwargs(**kwargs)
        assert "json" not in result
        assert "data" not in result
        assert "a" in result
        assert "b" in result
        assert "headers" in result
        headers = result["headers"]
        assert "Content-Type" not in headers

    def test_data_as_string_is_unchanged(self):
        """Test that `data` is unchanged when passed as a string."""
        api = GerritRestAPI(url="http://review.example.com")
        kwargs = {"data": "Content with non base64 valid chars åäö"}
        result = api.translate_kwargs(**kwargs)
        assert "json" not in result
        assert "data" in result
        assert result["data"] == "Content with non base64 valid chars åäö"
        assert "headers" in result
        headers = result["headers"]
        assert "Content-Type" not in headers


if __name__ == '__main__':
    unittest.main()