"""G11 -- the frontend and its supporting endpoints are served. No browser
automation: serving and shape only."""
import re

import pytest

pytestmark = pytest.mark.contract


def _extract_asset_path(html, filename):
    match = re.search(rf'(?:src|href)=["\']([^"\']*{re.escape(filename)})["\']', html)
    assert match, f"could not find a reference to {filename} in the index page"
    path = match.group(1)
    return path if path.startswith("/") else f"/{path}"


async def test_index_serves_html_referencing_assets(api):
    """G11: GET / returns 200, text/html, and references app.js and style.css."""
    resp = await api.get("/")
    assert resp.status_code == 200
    assert "text/html" in resp.headers.get("content-type", "")
    body = resp.text
    assert "app.js" in body
    assert "style.css" in body


async def test_app_js_served(api):
    """G11: app.js returns 200 with a JS content type."""
    index_html = (await api.get("/")).text
    resp = await api.get(_extract_asset_path(index_html, "app.js"))
    assert resp.status_code == 200
    ctype = resp.headers.get("content-type", "")
    assert "javascript" in ctype or "ecmascript" in ctype


async def test_style_css_served(api):
    """G11: style.css returns 200 with a CSS content type."""
    index_html = (await api.get("/")).text
    resp = await api.get(_extract_asset_path(index_html, "style.css"))
    assert resp.status_code == 200
    assert "css" in resp.headers.get("content-type", "")


async def test_accounts_list_endpoint(api):
    """G11: GET /api/accounts returns >= 100 accounts with the expected shape."""
    resp = await api.get("/api/accounts")
    assert resp.status_code == 200
    accounts = resp.json()
    assert len(accounts) >= 100
    sample = accounts[0]
    for field in ("id", "holder_name", "currency", "balance_minor"):
        assert field in sample, sample