"""Frontend Next/ESLint/PostCSS overlay lives under periscope/src."""

from __future__ import annotations

from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
SRC = ROOT / "periscope" / "src" / "frontend"


def test_next_and_eslint_are_src():
    for rel in ("next.config.ts", "eslint.config.mjs", "postcss.config.mjs", "tsconfig.json"):
        path = SRC / rel
        assert path.is_file(), rel
        assert "Native Periscope overlay" not in path.read_text(encoding="utf-8")[:400]


def test_next_config_keeps_runtime_contract():
    text = (SRC / "next.config.ts").read_text(encoding="utf-8")
    assert 'from "./src/lib/csp-hosts"' in text
    assert 'allowedDevOrigins: ["127.0.0.1", "localhost"]' in text
    assert 'serverExternalPackages: ["pdfjs-dist"]' in text
    assert 'canvas: { browser: "" }' in text
    assert 'source: "/login"' in text
    assert 'destination: "/sign-in"' in text
    assert 'source: "/register"' in text
    assert 'destination: "/sign-up"' in text
    assert "X-Content-Type-Options" in text
    assert "X-Frame-Options" in text
    assert "Strict-Transport-Security" in text
    assert "Content-Security-Policy" in text
    assert "worker-src 'self' blob:" in text
    assert "pdfjs-dist" in text


def test_eslint_uses_next_core_web_vitals():
    text = (SRC / "eslint.config.mjs").read_text(encoding="utf-8")
    assert "eslint-config-next/core-web-vitals" in text
    assert "eslint-config-next/typescript" in text
    assert ".next/**" in text