"""E2E UI tests with Playwright/Chromium (#120).

Run: pytest tests/e2e/ -m e2e --headed  (with browser)
     pytest tests/e2e/ -m e2e            (headless)

Requires: pip install playwright && playwright install chromium
Target: https://gwoe.toppyr.de (live)
"""

import pytest

BASE_URL = "https://gwoe.toppyr.de"

pytestmark = pytest.mark.e2e


@pytest.fixture(scope="module")
def browser():
    from playwright.sync_api import sync_playwright
    pw = sync_playwright().start()
    br = pw.chromium.launch(headless=True)
    yield br
    br.close()
    pw.stop()


@pytest.fixture
def page(browser):
    p = browser.new_page()
    yield p
    p.close()


# ─── Page Load ────────────────────────────────────────────────────────

def test_main_page_loads(page):
    page.goto(BASE_URL)
    page.wait_for_timeout(3000)
    assert page.title() == "GWÖ-Antragsprüfer"


def test_assessments_render(page):
    page.goto(BASE_URL)
    page.wait_for_timeout(3000)
    items = page.locator(".list-item").count()
    assert items >= 1, "Keine Assessments in der Liste"


def test_no_js_errors(page):
    errors = []
    page.on("pageerror", lambda err: errors.append(err.message))
    page.goto(BASE_URL)
    page.wait_for_timeout(3000)
    assert not errors, f"JS-Fehler: {errors}"


# ─── Navigation ──────────────────────────────────────────────────────

def test_detail_loads_on_click(page):
    page.goto(BASE_URL)
    page.wait_for_timeout(3000)
    first = page.locator(".list-item").first
    first.click()
    page.wait_for_timeout(2000)
    detail = page.locator("#detail-panel").inner_text()
    assert len(detail) > 50, "Detail-Panel leer nach Klick"


def test_keyboard_navigation(page):
    page.goto(BASE_URL)
    page.wait_for_timeout(3000)
    # j selects first item
    page.keyboard.press("j")
    active = page.locator(".list-item.active").count()
    assert active == 1, "j-Taste markiert kein Item"
    # k goes back (stays on first)
    page.keyboard.press("k")
    assert page.locator(".list-item.active").count() == 1


def test_search(page):
    page.goto(BASE_URL)
    page.wait_for_timeout(3000)
    search = page.locator("#search-input")
    search.fill("Bildung")
    page.wait_for_timeout(1000)
    # Should still show items (or search results)
    items = page.locator(".list-item").count()
    assert items >= 0  # search may return 0, but shouldn't error


# ─── Subpages ────────────────────────────────────────────────────────

def test_impressum_page(page):
    page.goto(f"{BASE_URL}/impressum")
    page.wait_for_timeout(1000)
    assert "Angaben" in page.content()


def test_datenschutz_page(page):
    page.goto(f"{BASE_URL}/datenschutz")
    page.wait_for_timeout(1000)
    assert "Datenschutz" in page.content()


def test_methodik_page(page):
    page.goto(f"{BASE_URL}/methodik")
    page.wait_for_timeout(1000)
    assert "Methodik" in page.content()


def test_auswertungen_page(page):
    errors = []
    page.on("pageerror", lambda err: errors.append(err.message))
    page.goto(f"{BASE_URL}/auswertungen")
    page.wait_for_timeout(2000)
    assert not errors, f"JS-Fehler auf Auswertungen: {errors}"


def test_quellen_page(page):
    page.goto(f"{BASE_URL}/quellen")
    page.wait_for_timeout(1000)
    assert "Wahlprogramm" in page.content() or "Quellen" in page.content()


# ─── API ─────────────────────────────────────────────────────────────

def test_api_assessments(page):
    resp = page.request.get(f"{BASE_URL}/api/assessments")
    assert resp.ok
    data = resp.json()
    assert isinstance(data, list)
    assert len(data) > 0
    # Lightweight: should NOT contain gwoeMatrix (memory optimization)
    assert "gwoeMatrix" not in data[0], "List API should not contain detail fields"


def test_api_assessment_detail(page):
    list_resp = page.request.get(f"{BASE_URL}/api/assessments")
    first = list_resp.json()[0]
    ds = first["drucksache"]
    resp = page.request.get(f"{BASE_URL}/api/assessment?drucksache={ds}")
    assert resp.ok
    detail = resp.json()
    assert "gwoeMatrix" in detail, "Detail API should contain gwoeMatrix"
    assert "gwoeBegründung" in detail


def test_api_export_json(page):
    resp = page.request.get(f"{BASE_URL}/api/auswertungen/export.json")
    assert resp.ok
    data = resp.json()
    assert "meta" in data
    assert data["meta"]["license"] == "CC BY 4.0"
    assert len(data["assessments"]) > 0


def test_api_votes(page):
    resp = page.request.get(f"{BASE_URL}/api/votes?drucksache=18/8125")
    assert resp.ok
    data = resp.json()
    assert "counts" in data
    assert "my_votes" in data


def test_api_health(page):
    resp = page.request.get(f"{BASE_URL}/health")
    assert resp.ok
    assert resp.json()["status"] == "ok"


# ─── Dark Mode ───────────────────────────────────────────────────────

def test_dark_mode_toggle(page):
    page.goto(BASE_URL)
    page.wait_for_timeout(2000)
    # Initially light
    theme = page.evaluate("document.documentElement.getAttribute('data-theme')")
    assert theme != "dark"
    # Toggle via JS (simulates button)
    page.evaluate("document.documentElement.setAttribute('data-theme', 'dark')")
    theme = page.evaluate("document.documentElement.getAttribute('data-theme')")
    assert theme == "dark"


# ─── Accessibility ───────────────────────────────────────────────────

def test_search_has_aria_label(page):
    page.goto(BASE_URL)
    page.wait_for_timeout(2000)
    label = page.locator("#search-input").get_attribute("aria-label")
    assert label, "Suchfeld hat kein aria-label"


def test_hamburger_has_aria_label(page):
    page.goto(BASE_URL)
    page.wait_for_timeout(2000)
    btn = page.locator("button[aria-label='Menü öffnen']")
    assert btn.count() == 1, "Hamburger-Button hat kein aria-label"


def test_focus_visible_indicator(page):
    page.goto(BASE_URL)
    page.wait_for_timeout(2000)
    # Check that :focus-visible style exists
    has_focus = page.evaluate("""() => {
        const rules = [...document.styleSheets[0].cssRules];
        return rules.some(r => r.selectorText && r.selectorText.includes('focus-visible'));
    }""")
    assert has_focus, "Kein :focus-visible CSS-Regel gefunden"