import pytest

from phasm.exceptions import StaticError
from phasm.type3.entry import Type3Exception

from ..helpers import Suite


@pytest.mark.integration_test
def test_struct_0():
    code_py = """
class CheckedValue:
    value: i32

@exported
def testEntry() -> i32:
    return helper(CheckedValue(23))

def helper(cv: CheckedValue) -> i32:
    return cv.value
"""

    result = Suite(code_py).run_code()

    assert 23 == result.returned_value

@pytest.mark.integration_test
def test_struct_1():
    code_py = """
class Rectangle:
    height: i32
    width: i32
    border: i32

@exported
def testEntry() -> i32:
    return helper(Rectangle(100, 150, 2))

def helper(shape: Rectangle) -> i32:
    return shape.height + shape.width + shape.border
"""

    result = Suite(code_py).run_code()

    assert 252 == result.returned_value

@pytest.mark.integration_test
def test_struct_2():
    code_py = """
class Rectangle:
    height: i32
    width: i32
    border: i32

@exported
def testEntry() -> i32:
    return helper(Rectangle(100, 150, 2), Rectangle(200, 90, 3))

def helper(shape1: Rectangle, shape2: Rectangle) -> i32:
    return shape1.height + shape1.width + shape1.border + shape2.height + shape2.width + shape2.border
"""

    result = Suite(code_py).run_code()

    assert 545 == result.returned_value

@pytest.mark.integration_test
@pytest.mark.parametrize('type_', ['i32', 'i64', 'f32', 'f64'])
def test_type_mismatch_struct_member(type_):
    code_py = f"""
class Struct:
    param: {type_}

def testEntry(arg: Struct) -> (i32, i32, ):
    return arg.param
"""

    with pytest.raises(Type3Exception, match=type_ + r' must be \(i32, i32, \) instead'):
        Suite(code_py).run_code()

@pytest.mark.integration_test
def test_name_already_use_struct():
    code_py = """
class Struct:
    param: i32

class Struct:
    param: i64
"""

    with pytest.raises(StaticError, match='Struct already defined as type'):
        Suite(code_py).run_code()

@pytest.mark.integration_test
def test_name_already_use_type():
    code_py = """
class f32:
    param: i32
"""

    with pytest.raises(StaticError, match='f32 already defined as type'):
        Suite(code_py).run_code()

@pytest.mark.integration_test
@pytest.mark.skip(reason='FIXME: See constraintgenerator.py for AccessStructMember')
def test_struct_not_accessible():
    code_py = """
@exported
def testEntry(x: u8) -> u8:
    return x.y
"""

    with pytest.raises(Type3Exception, match='u8 is not struct'):
        Suite(code_py).run_code()

@pytest.mark.integration_test
def test_struct_export_constant():
    code_py = """
class CheckedValue:
    value: i32

CONSTANT: CheckedValue = CheckedValue(32)

@exported
def testEntry() -> CheckedValue:
    return CONSTANT
"""

    result = Suite(code_py).run_code()

    assert {"value": 32} == result.returned_value

@pytest.mark.integration_test
def test_struct_export_instantiation():
    code_py = """
class CheckedValue:
    value: i32

@exported
def testEntry() -> CheckedValue:
    return CheckedValue(32)
"""

    result = Suite(code_py).run_code()

    assert {"value": 32} == result.returned_value