"""A parameter of a file-scope anonymous callback must shadow same-named
functions elsewhere in the corpus (#4448).

#3124 walks the body of a closure passed in a module-level call statement
(`items.forEach(function (value) { ... })`, AngularJS `.controller(...)`,
`it("...", () => { ... })`) under the file node, but did not register the
closure's own params/locals for that walk. A parameter passed on as a call
argument was then resolved against the corpus-wide label index and became an
`indirect_call` from the file to any function named like it. Inside a named
function the same code was already handled (#2241, #2568).
"""
from __future__ import annotations

from graphify.extract import extract

_TARGET = {"b.js": "function value(x) { return x; }\n"}


def _indirect(tmp_path, a_js: str):
    files = {"a.js": a_js, **_TARGET}
    for name, body in files.items():
        (tmp_path / name).write_text(body)
    r = extract([tmp_path / n for n in files],
                cache_root=tmp_path / "graphify-out", parallel=False)
    lbl = {n["id"]: n["label"] for n in r["nodes"]}
    return {(lbl.get(e["source"]), lbl.get(e["target"])) for e in r["edges"]
            if e["relation"] == "indirect_call"}


def test_callback_param_passed_to_a_member_call_is_not_a_reference(tmp_path):
    assert _indirect(tmp_path, "items.forEach(function (value) { s.on(value); });\n") == set()


def test_callback_param_passed_to_a_bare_call_is_not_a_reference(tmp_path):
    assert _indirect(tmp_path, "items.forEach(function (value) { emit(value); });\n") == set()


def test_param_of_a_nested_file_scope_callback_is_not_a_reference(tmp_path):
    src = "m.c(function (s) { items.forEach(function (value) { s.on(value); }); });\n"
    assert _indirect(tmp_path, src) == set()


def test_arrow_callback_params_are_not_references(tmp_path):
    src = "items.forEach((value) => emit(value));\nitems.map(value => emit(value));\n"
    assert _indirect(tmp_path, src) == set()


def test_callback_var_is_not_a_reference(tmp_path):
    src = "items.forEach(function () { var value = 1; emit(value); });\n"
    assert _indirect(tmp_path, src) == set()


def test_unbound_name_inside_a_file_scope_callback_still_resolves(tmp_path):
    assert _indirect(tmp_path, "items.forEach(function (x) { emit(value); });\n") == {("a.js", "value()")}


def test_a_sibling_callbacks_param_does_not_shadow(tmp_path):
    src = "m.c(function (value) { emit(1); }, function () { emit(value); });\n"
    assert _indirect(tmp_path, src) == {("a.js", "value()")}


def test_param_of_a_callback_inside_a_test_block_is_not_a_reference(tmp_path):
    # The inner arrow is itself an expression statement inside the `it`
    # callback, so the #3124 branch tracks it as its own body too.
    src = (
        "describe('d', () => {\n"
        "  it('t', async () => {\n"
        "    intercept((value) => respond(value, 1));\n"
        "  });\n"
        "});\n"
    )
    assert _indirect(tmp_path, src) == set()