# coding=utf8

"""Test Python parser"""

import sys
import unittest
from textwrap import dedent

import astroid
import pytest

from autoapi.mappers.python import Parser

if sys.version_info < (3, 0):
    from StringIO import StringIO
else:
    from io import StringIO


class PythonParserTests(unittest.TestCase):

    def parse(self, source):
        node = astroid.extract_node(source)
        return Parser().parse(node)

    def test_parses_basic_file(self):
        source = """
        def foo(bar):
            pass
        """
        data = self.parse(source)[0]
        self.assertEqual(data['name'], 'foo')
        self.assertEqual(data['type'], 'function')

    def test_parses_all(self):
        source = """
        __all__ = ['Foo', 5.0]
        """
        data = self.parse(source)[0]
        self.assertEqual(data['name'], '__all__')
        self.assertEqual(data['value'], ['Foo', 5.0])

    @pytest.mark.xfail(reason="Cannot parse list additions")
    def test_parses_all_with_list_addition(self):
        source = """
        __all__ = ['Foo'] + []
        """
        data = self.parse(source)[0]
        self.assertEqual(data['name'], '__all__')
        self.assertEqual(data['value'], ['Foo'])

    @pytest.mark.xfail(reason="Cannot parse list additions")
    def test_parses_all_with_name_addtion(self):
        source = """
        __all__ = ['Foo'] + bar.__all__
        """
        data = self.parse(source)[0]
        self.assertEqual(data['name'], '__all__')
        self.assertEqual(data['value'], ['Foo'])

    @pytest.mark.xfail(reason="Cannot parse list additions")
    def test_parses_all_with_multiple_name_addtions(self):
        source = """
        __all__ = foo + bar
        __all__ += boop
        __all__ += ['foo']
        """
        data = self.parse(source)
        self.assertEqual(data['name'], '__all__')
        self.assertEqual(data['value'], ['foo'])
        source = """
        __all__ = ['foo']
        __all__ = foo
        """
        data = self.parse(source)
        self.assertEqual(data['name'], '__all__')
        self.assertEqual(data['value'], [])

    def test_parses_all_multiline(self):
        source = """
        __all__ = [
            'foo',
            'bar',
        ]
        """
        data = self.parse(source)[0]
        self.assertEqual(data['value'], ['foo', 'bar'])

    @pytest.mark.xfail(reason="Cannot parse list additions")
    def test_parses_all_generator(self):
        source = """
        __all__ = [x for x in dir(token) if x[0] != '_'] + ['foo', 'bar']
        """
        data = self.parse(source)[0]
        self.assertEqual(data['value'], ['foo', 'bar'])

    def test_parses_name(self):
        source = "foo.bar"
        self.assertEqual(self.parse(source), {})

    def test_parses_list(self):
        name = "__all__"
        value = [1, 2, 3, 4]
        source = "{} = {}".format(name, value)
        data = self.parse(source)[0]
        self.assertEqual(data['name'], name)
        self.assertEqual(data['value'], value)

    def test_parses_nested_list(self):
        name = "__all__"
        value = [[1, 2], [3, 4]]
        source = "{} = {}".format(name, value)
        data = self.parse(source)[0]
        self.assertEqual(data['name'], name)
        self.assertEqual(data['value'], value)

    def test_arguments(self):
        """Argument parsing of source"""
        source=(
            'def foobar(self, bar, baz=42, foo=True,\n'
            '           *args, **kwargs):\n'
            '    "This is a docstring"\n'
            '    return True\n'
        )
        data = self.parse(source)[0]
        self.assertEqual(
            data['args'],
            'self, bar, baz=42, foo=True, *args, **kwargs'
        )

    def test_advanced_arguments(self):
        """Advanced argument parsing"""
        source=(
            'def foobar(self, a, b, c=42, d="string", e=(1,2),\n'
            '           f={"a": True}, g=None, h=[1,2,3,4],\n'
            '           i=dict(a=True), j=False, *args, **kwargs):\n'
            '    "This is a docstring"\n'
            '    return True\n'
        )
        data = self.parse(source)[0]
        self.assertEqual(
            data['args'],
            ', '.join([
                'self',
                'a',
                'b',
                'c=42',
                'd=\'string\'',
                'e=(1, 2)',
                'f={\'a\': True}',
                'g=None',
                'h=[1, 2, 3, 4]',
                'i=dict(a=True)',
                'j=False',
                '*args',
                '**kwargs',
            ])
        )

    def test_dict_key_assignment(self):
        """Ignore assignment to dictionary entries."""
        source = """
        MY_DICT = {}  #@
        if condition:
            MY_DICT['key'] = 'value'
        MY_DICT['key2'] = 'value2'
        """
        data = self.parse(source)[0]
        self.assertEqual(data['name'], 'MY_DICT')

    def test_list_index_assignment(self):
        """Ignore assignment to indexes."""
        source = """
        COLOUR = [255, 128, 0]  #@
        if condition:
            COLOUR[1] = 255
        COLOUR[2] = 255
        """
        data = self.parse(source)[0]
        self.assertEqual(data['name'], 'COLOUR')