"""Test pycode.parser."""

from __future__ import annotations

from sphinx.pycode.parser import Parser
from sphinx.util.inspect import signature_from_str


def test_comment_picker_basic() -> None:
    source = (
        'a = 1 + 1      #: assignment\n'
        'b = 1 +\\\n 1  #: assignment including a CR\n'
        'c = (1 +\n 1)  #: tuple  \n'
        'd = {1, \n 1}  #:     set\n'
        'e = [1, \n 1]  #: list #: additional comment\n'
        'f = "abc"\n'
        '#: string; comment on next line (ignored)\n'
        'g = 1.0\n'
        '"""float; string on next line"""\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {
        ('', 'a'): 'assignment',
        ('', 'b'): 'assignment including a CR',
        ('', 'c'): 'tuple  ',
        ('', 'd'): '    set',
        ('', 'e'): 'list #: additional comment',
        ('', 'g'): 'float; string on next line',
    }


def test_comment_picker_location() -> None:
    # multiple "before" comments
    source = (
        '#: comment before assignment1\n#:\n#: comment before assignment2\na = 1 + 1\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {
        ('', 'a'): 'comment before assignment1\n\ncomment before assignment2'
    }

    # before and after comments
    source = '#: comment before assignment\na = 1 + 1  #: comment after assignment\n'
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {('', 'a'): 'comment after assignment'}

    # after comment and next line string
    source = 'a = 1 + 1\n  #: comment after assignment\n"""string on next line"""\n'
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {('', 'a'): 'string on next line'}

    # before comment and next line string
    source = '#: comment before assignment\na = 1 + 1\n"""string on next line"""\n'
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {('', 'a'): 'string on next line'}

    # before comment, after comment and next line string
    source = (
        '#: comment before assignment\n'
        'a = 1 + 1  #: comment after assignment\n'
        '"""string on next line"""\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {('', 'a'): 'string on next line'}

    # inside __init__ method
    source = (
        'class Foo(object):\n'
        '    def __init__(self):\n'
        '        #: comment before assignment\n'
        '        self.attr1 = None\n'
        '        self.attr2 = None  #: comment after assignment\n'
        '\n'
        '        #: comment for attr3(1)\n'
        '        self.attr3 = None  #: comment for attr3(2)\n'
        '        """comment for attr3(3)"""\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {
        ('Foo', 'attr1'): 'comment before assignment',
        ('Foo', 'attr2'): 'comment after assignment',
        ('Foo', 'attr3'): 'comment for attr3(3)',
    }


def test_annotated_assignment() -> None:
    source = (
        'a: str = "Sphinx"  #: comment\n'
        'b: int = 1\n'
        '"""string on next line"""\n'
        'c: int  #: comment\n'
        'd = 1  # type: int\n'
        '"""string on next line"""\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {
        ('', 'a'): 'comment',
        ('', 'b'): 'string on next line',
        ('', 'c'): 'comment',
        ('', 'd'): 'string on next line',
    }
    assert parser.annotations == {
        ('', 'a'): 'str',
        ('', 'b'): 'int',
        ('', 'c'): 'int',
        ('', 'd'): 'int',
    }
    assert parser.definitions == {}


def test_complex_assignment() -> None:
    source = (
        'a = 1 + 1; b = a  #: compound statement\n'
        'c, d = (1, 1)  #: unpack assignment\n'
        'e = True  #: first assignment\n'
        'e = False  #: second assignment\n'
        'f = g = None  #: multiple assignment at once\n'
        '(theta, phi) = (0, 0.5)  #: unpack assignment via tuple\n'
        '[x, y] = (5, 6)  #: unpack assignment via list\n'
        'h, *i, j = (1, 2, 3, 4)  #: unpack assignment2\n'
        'k, *self.attr = (5, 6, 7)  #: unpack assignment3\n'
        'l, *m[0] = (8, 9, 0)  #: unpack assignment4\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {
        ('', 'b'): 'compound statement',
        ('', 'c'): 'unpack assignment',
        ('', 'd'): 'unpack assignment',
        ('', 'e'): 'second assignment',
        ('', 'f'): 'multiple assignment at once',
        ('', 'g'): 'multiple assignment at once',
        ('', 'theta'): 'unpack assignment via tuple',
        ('', 'phi'): 'unpack assignment via tuple',
        ('', 'x'): 'unpack assignment via list',
        ('', 'y'): 'unpack assignment via list',
        ('', 'h'): 'unpack assignment2',
        ('', 'i'): 'unpack assignment2',
        ('', 'j'): 'unpack assignment2',
        ('', 'k'): 'unpack assignment3',
        ('', 'l'): 'unpack assignment4',
    }
    assert parser.definitions == {}


def test_assignment_in_try_clause() -> None:
    source = (
        'try:\n'
        '    a = None  #: comment\n'
        'except:\n'
        '    b = None  #: ignored\n'
        'else:\n'
        '    c = None  #: comment\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {('', 'a'): 'comment', ('', 'c'): 'comment'}
    assert parser.deforders == {'a': 0, 'c': 1}


def test_obj_assignment() -> None:
    source = (
        'obj = SomeObject()  #: some object\n'
        'obj.attr = 1  #: attr1\n'
        'obj.attr.attr = 1  #: attr2\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {('', 'obj'): 'some object'}
    assert parser.definitions == {}


def test_container_assignment() -> None:
    source = (
        'l = []  #: list\n'
        'l[1] = True  #: list assignment\n'
        'l[0:0] = []  #: list assignment\n'
        'l[_from:_to] = []  #: list assignment\n'
        'd = {}  #: dict\n'
        'd["doc"] = 1  #: dict assignment\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {('', 'l'): 'list', ('', 'd'): 'dict'}
    assert parser.definitions == {}


def test_function() -> None:
    source = (
        'def some_function():\n'
        '    """docstring"""\n'
        '    a = 1 + 1  #: comment1\n'
        '\n'
        '    b = a  #: comment2\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {}
    assert parser.definitions == {'some_function': ('def', 1, 5)}
    assert parser.deforders == {'some_function': 0}


def test_nested_function() -> None:
    source = (
        'def some_function():\n'
        '    a = 1 + 1  #: comment1\n'
        '\n'
        '    def inner_function():\n'
        '        b = 1 + 1  #: comment2\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {}
    assert parser.definitions == {'some_function': ('def', 1, 5)}
    assert parser.deforders == {'some_function': 0}


def test_class() -> None:
    source = (
        'class Foo(object):\n'
        '    attr1 = None  #: comment1\n'
        '    attr2 = None  #: comment2\n'
        '\n'
        '    def __init__(self):\n'
        '        self.a = 1 + 1  #: comment3\n'
        '        self.attr2 = 1 + 1  #: overridden\n'
        '        b = 1 + 1  #: comment5\n'
        '\n'
        '    def some_method(self):\n'
        '        c = 1 + 1  #: comment6\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {
        ('Foo', 'attr1'): 'comment1',
        ('Foo', 'a'): 'comment3',
        ('Foo', 'attr2'): 'overridden',
    }
    assert parser.definitions == {
        'Foo': ('class', 1, 11),
        'Foo.__init__': ('def', 5, 8),
        'Foo.some_method': ('def', 10, 11),
    }
    assert parser.deforders == {
        'Foo': 0,
        'Foo.attr1': 1,
        'Foo.__init__': 3,
        'Foo.a': 4,
        'Foo.attr2': 5,
        'Foo.some_method': 6,
    }


def test_class_uses_non_self() -> None:
    source = (
        'class Foo(object):\n'
        '    def __init__(this):\n'
        '        this.a = 1 + 1  #: comment\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {('Foo', 'a'): 'comment'}
    assert parser.definitions == {'Foo': ('class', 1, 3), 'Foo.__init__': ('def', 2, 3)}
    assert parser.deforders == {'Foo': 0, 'Foo.__init__': 1, 'Foo.a': 2}


def test_nested_class() -> None:
    source = (
        'class Foo(object):\n'
        '    attr1 = None  #: comment1\n'
        '\n'
        '    class Bar(object):\n'
        '        attr2 = None  #: comment2\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {
        ('Foo', 'attr1'): 'comment1',
        ('Foo.Bar', 'attr2'): 'comment2',
    }
    assert parser.definitions == {'Foo': ('class', 1, 5), 'Foo.Bar': ('class', 4, 5)}
    assert parser.deforders == {
        'Foo': 0,
        'Foo.attr1': 1,
        'Foo.Bar': 2,
        'Foo.Bar.attr2': 3,
    }


def test_class_comment() -> None:
    source = (
        'import logging\n'
        'logger = logging.getLogger(__name__)\n'
        '\n'
        'class Foo(object):\n'
        '    """Bar"""\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {}
    assert parser.definitions == {'Foo': ('class', 4, 5)}


def test_comment_picker_multiline_string() -> None:
    source = (
        'class Foo(object):\n'
        '    a = None\n'
        '    """multiline\n'
        '    docstring\n'
        '    """\n'
        '    b = None\n'
        '    """\n'
        '    docstring\n'
        '    starts with::\n'
        '\n'
        '        empty line"""\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {
        ('Foo', 'a'): 'multiline\ndocstring',
        ('Foo', 'b'): 'docstring\nstarts with::\n\n    empty line',
    }


def test_decorators() -> None:
    source = (
        '@deco\n'
        'def func1(): pass\n'
        '\n'
        '@deco(param1, param2)\n'
        'def func2(): pass\n'
        '\n'
        '@deco1\n'
        '@deco2\n'
        'def func3(): pass\n'
        '\n'
        '@deco\n'
        'class Foo():\n'
        '    @deco1\n'
        '    @deco2\n'
        '    def method(self): pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.definitions == {
        'func1': ('def', 1, 2),
        'func2': ('def', 4, 5),
        'func3': ('def', 7, 9),
        'Foo': ('class', 11, 15),
        'Foo.method': ('def', 13, 15),
    }


def test_async_function_and_method() -> None:
    source = (
        'async def some_function():\n'
        '    """docstring"""\n'
        '    a = 1 + 1  #: comment1\n'
        '\n'
        'class Foo:\n'
        '    async def method(self):\n'
        '        pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.definitions == {
        'some_function': ('def', 1, 3),
        'Foo': ('class', 5, 7),
        'Foo.method': ('def', 6, 7),
    }


def test_imports() -> None:
    source = (
        'import sys\n'
        'from os import environment, path\n'
        '\n'
        'import sphinx as Sphinx\n'
        'from sphinx.application import Sphinx as App\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.definitions == {}
    assert parser.deforders == {
        'sys': 0,
        'environment': 1,
        'path': 2,
        'Sphinx': 3,
        'App': 4,
    }


def test_formfeed_char() -> None:
    source = 'class Foo:\n\f\n    attr = 1234  #: comment\n'
    parser = Parser(source)
    parser.parse()
    assert parser.comments == {('Foo', 'attr'): 'comment'}


def test_typing_final() -> None:
    source = (
        'import typing\n'
        '\n'
        '@typing.final\n'
        'def func(): pass\n'
        '\n'
        '@typing.final\n'
        'class Foo:\n'
        '    @typing.final\n'
        '    def meth(self):\n'
        '        pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.finals == ['func', 'Foo', 'Foo.meth']


def test_typing_final_from_import() -> None:
    source = (
        'from typing import final\n'
        '\n'
        '@final\n'
        'def func(): pass\n'
        '\n'
        '@final\n'
        'class Foo:\n'
        '    @final\n'
        '    def meth(self):\n'
        '        pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.finals == ['func', 'Foo', 'Foo.meth']


def test_typing_final_import_as() -> None:
    source = (
        'import typing as foo\n'
        '\n'
        '@foo.final\n'
        'def func(): pass\n'
        '\n'
        '@foo.final\n'
        'class Foo:\n'
        '    @typing.final\n'
        '    def meth(self):\n'
        '        pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.finals == ['func', 'Foo']


def test_typing_final_from_import_as() -> None:
    source = (
        'from typing import final as bar\n'
        '\n'
        '@bar\n'
        'def func(): pass\n'
        '\n'
        '@bar\n'
        'class Foo:\n'
        '    @final\n'
        '    def meth(self):\n'
        '        pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.finals == ['func', 'Foo']


def test_typing_final_not_imported() -> None:
    source = (
        '@typing.final\n'
        'def func(): pass\n'
        '\n'
        '@typing.final\n'
        'class Foo:\n'
        '    @final\n'
        '    def meth(self):\n'
        '        pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.finals == []


def test_typing_overload() -> None:
    source = (
        'import typing\n'
        '\n'
        '@typing.overload\n'
        'def func(x: int, y: int) -> int: pass\n'
        '\n'
        '@typing.overload\n'
        'def func(x: str, y: str) -> str: pass\n'
        '\n'
        'def func(x, y): pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.overloads == {
        'func': [
            signature_from_str('(x: int, y: int) -> int'),
            signature_from_str('(x: str, y: str) -> str'),
        ]
    }


def test_typing_overload_from_import() -> None:
    source = (
        'from typing import overload\n'
        '\n'
        '@overload\n'
        'def func(x: int, y: int) -> int: pass\n'
        '\n'
        '@overload\n'
        'def func(x: str, y: str) -> str: pass\n'
        '\n'
        'def func(x, y): pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.overloads == {
        'func': [
            signature_from_str('(x: int, y: int) -> int'),
            signature_from_str('(x: str, y: str) -> str'),
        ]
    }


def test_typing_overload_import_as() -> None:
    source = (
        'import typing as foo\n'
        '\n'
        '@foo.overload\n'
        'def func(x: int, y: int) -> int: pass\n'
        '\n'
        '@foo.overload\n'
        'def func(x: str, y: str) -> str: pass\n'
        '\n'
        'def func(x, y): pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.overloads == {
        'func': [
            signature_from_str('(x: int, y: int) -> int'),
            signature_from_str('(x: str, y: str) -> str'),
        ]
    }


def test_typing_overload_from_import_as() -> None:
    source = (
        'from typing import overload as bar\n'
        '\n'
        '@bar\n'
        'def func(x: int, y: int) -> int: pass\n'
        '\n'
        '@bar\n'
        'def func(x: str, y: str) -> str: pass\n'
        '\n'
        'def func(x, y): pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.overloads == {
        'func': [
            signature_from_str('(x: int, y: int) -> int'),
            signature_from_str('(x: str, y: str) -> str'),
        ]
    }


def test_typing_overload_not_imported() -> None:
    source = (
        '@typing.final\n'
        'def func(x: int, y: int) -> int: pass\n'
        '\n'
        '@typing.final\n'
        'def func(x: str, y: str) -> str: pass\n'
        '\n'
        'def func(x, y): pass\n'
    )
    parser = Parser(source)
    parser.parse()
    assert parser.overloads == {}