from __future__ import annotations

import importlib
import threading
from http.server import HTTPServer
from pathlib import Path

import pytest

ROOT = Path(__file__).resolve().parent.parent
VENDOR = ROOT / "ui" / "vendor" / "whynot-design"

REQUIRED_VENDOR_FILES = [
    VENDOR / ".whynot-design-ref",
    VENDOR / "colors_and_type.css",
    VENDOR / "components.css",
    VENDOR / "index.js",
    VENDOR / "elements" / "atoms.js",
    VENDOR / "elements" / "chrome.js",
    VENDOR / "elements" / "form.js",
    VENDOR / "elements" / "layout.js",
    VENDOR / "elements" / "icons.js",
    VENDOR / "elements" / "_styles.js",
    VENDOR / "tokens" / "colors.json",
]


def test_vendor_tree_is_complete() -> None:
    missing = [path for path in REQUIRED_VENDOR_FILES if not path.exists()]
    assert not missing, f"Missing vendored whynot-design files: {missing}"


def test_vendor_ref_is_pinned() -> None:
    ref = (VENDOR / ".whynot-design-ref").read_text(encoding="utf-8").strip()
    assert len(ref) == 40


def test_server_serves_vendor_modules() -> None:
    server_module = importlib.import_module("observatory.server")
    handler = server_module.ObservatoryHandler
    handler.data_dir = ROOT / "data"

    httpd = HTTPServer(("127.0.0.1", 0), handler)
    port = httpd.server_address[1]
    thread = threading.Thread(target=httpd.serve_forever, daemon=True)
    thread.start()

    try:
        import urllib.request

        index = urllib.request.urlopen(f"http://127.0.0.1:{port}/", timeout=2)
        assert "wn-top-nav" in index.read().decode("utf-8")

        module = urllib.request.urlopen(
            f"http://127.0.0.1:{port}/ui/vendor/whynot-design/index.js",
            timeout=2,
        )
        assert module.headers["Content-Type"].startswith("application/javascript")
        assert "defineAtoms" in module.read().decode("utf-8")
    finally:
        httpd.shutdown()
        thread.join(timeout=2)