# retoor <retoor@molodetz.nl>

import ast
from pathlib import Path

PACKAGE = Path(__file__).resolve().parents[2] / "devplacepy"


def _json_error_calls():
    for path in sorted(PACKAGE.rglob("*.py")):
        tree = ast.parse(path.read_text(), filename=str(path))
        for node in ast.walk(tree):
            if not isinstance(node, ast.Call):
                continue
            name = node.func.attr if isinstance(node.func, ast.Attribute) else getattr(node.func, "id", "")
            if name == "json_error" and node.args:
                yield path.relative_to(PACKAGE.parent), node


def test_json_error_never_receives_a_message_as_its_status():
    offenders = [
        f"{path}:{node.lineno}"
        for path, node in _json_error_calls()
        if isinstance(node.args[0], ast.Constant) and isinstance(node.args[0].value, str)
    ]
    assert not offenders, (
        "json_error(status_code, message) - a string in the status position builds a "
        f"JSONResponse with a non-int status and raises TypeError at request time: {offenders}"
    )


def test_json_error_never_receives_a_status_as_its_message():
    offenders = [
        f"{path}:{node.lineno}"
        for path, node in _json_error_calls()
        if len(node.args) > 1
        and isinstance(node.args[1], ast.Constant)
        and isinstance(node.args[1].value, int)
    ]
    assert not offenders, (
        "json_error(status_code, message) - an int in the message position means the "
        f"arguments were swapped: {offenders}"
    )


def test_every_json_error_status_is_a_real_http_error_code():
    for path, node in _json_error_calls():
        first = node.args[0]
        if isinstance(first, ast.Constant) and isinstance(first.value, int):
            assert 400 <= first.value <= 599, f"{path}:{node.lineno} status {first.value}"
