"""Contract for the loopback static server the browser tests run against.

The server used to bind a fixed port and raise if it was taken, which errored
every collected test rather than the browser ones — so a second worktree
running its own suite took the whole session down with it.
"""

import os
import re
import urllib.request
from pathlib import Path


ROOT = Path(__file__).resolve().parents[1]


def test_static_origin_is_published_for_node_subprocesses() -> None:
    origin = os.environ.get("ODYSSEUS_TEST_STATIC_ORIGIN")

    assert origin, "the session fixture must publish the origin it bound"
    assert re.fullmatch(r"http://127\.0\.0\.1:\d+", origin)


def test_static_origin_does_not_reuse_the_application_port() -> None:
    """An ephemeral port keeps the suite and a running instance independent."""

    origin = os.environ["ODYSSEUS_TEST_STATIC_ORIGIN"]

    assert not origin.endswith(":7011")


def test_static_server_serves_this_worktree() -> None:
    origin = os.environ["ODYSSEUS_TEST_STATIC_ORIGIN"]

    with urllib.request.urlopen(f"{origin}/static/js/documentStats.js", timeout=5) as r:
        assert r.status == 200
        assert r.headers.get_content_type() == "application/javascript"


def test_no_test_hardcodes_the_static_server_origin() -> None:
    """Regression guard: a hardcoded port reintroduces the collision."""

    needle = "page.goto(" + "'http://127.0.0.1:"
    offenders = []
    for path in sorted((ROOT / "tests").glob("*.py")):
        if path.name == Path(__file__).name:
            continue
        if needle in path.read_text(encoding="utf-8"):
            offenders.append(path.name)

    assert offenders == [], (
        "browser tests must read ODYSSEUS_TEST_STATIC_ORIGIN rather than a fixed port"
    )