"""Structural and Playwright tests for the generated order form."""

from __future__ import annotations

import base64
import json
import re
import sys
from pathlib import Path

import pytest

REPO_ROOT = Path(__file__).resolve().parents[1]
SERVER_DIR = REPO_ROOT / "src" / "server"
FIXTURES = Path(__file__).resolve().parent / "fixtures"

sys.path.insert(0, str(SERVER_DIR))

from generate_form import generate_form  # noqa: E402

EXPECTED_CONFIG_KEYS = {
    "authMode",
    "meals",
    "roster",
    "week",
    "submitUrl",
    "statusUrl",
    "rosterUrl",
    "adminUrl",
    "adminPdfUrl",
    "apiKey",
    "bulkDiscount",
    "companySubsidy",
    "googleClientId",
    "deadline",
    "scrapedAt",
    "hasDiscount",
}


def _load_fixtures():
    menu = json.loads((FIXTURES / "menu.json").read_text())
    config = json.loads((FIXTURES / "config.json").read_text())
    return menu, config


def _extract_config(html: str) -> dict:
    match = re.search(
        r"window\.CONFIG\s*=\s*(\{.*?\});",
        html,
        flags=re.DOTALL,
    )
    assert match, "window.CONFIG blob not found"
    return json.loads(match.group(1))


def _render(*, google: bool = False, api_key: str = "test-key") -> str:
    menu, config = _load_fixtures()
    return generate_form(
        menu,
        config,
        api_url="https://api.example.com",
        api_key=api_key,
        bulk_discount=10,
        company_subsidy=50,
        google_client_id="google-client.apps.googleusercontent.com" if google else "",
    )


def _google_credential() -> str:
    payload = json.dumps(
        {
            "name": "Test Admin",
            "email": "test-admin@example.com",
            "picture": (
                "data:image/svg+xml,"
                "<svg xmlns='http://www.w3.org/2000/svg' width='40' height='40'/>"
            ),
        }
    ).encode()
    encoded = base64.urlsafe_b64encode(payload).decode().rstrip("=")
    return f"e30.{encoded}.signature"


class TestGenerateFormStructural:
    def test_local_and_google_render(self):
        local = _render(google=False)
        google = _render(google=True)
        assert "FORM_HTML_MARKER" in local
        assert "FORM_HTML_MARKER" in google
        assert 'id="emp-name"' in local
        assert 'id="emp-name"' not in google
        assert "accounts.google.com/gsi/client" in google
        assert "accounts.google.com/gsi/client" not in local
        assert 'id="auth-overlay"' in google
        assert 'id="auth-overlay"' not in local

    def test_single_config_blob_and_keys(self):
        for google in (False, True):
            html = _render(google=google)
            assert html.count("window.CONFIG =") == 1
            cfg = _extract_config(html)
            assert EXPECTED_CONFIG_KEYS <= set(cfg.keys())
            assert cfg["authMode"] == ("google" if google else "local")
            if google:
                assert cfg["googleClientId"]
            else:
                assert cfg["googleClientId"] == ""
            assert cfg["bulkDiscount"] == 10
            assert cfg["companySubsidy"] == 50
            assert cfg["hasDiscount"] is True

    def test_no_legacy_const_injections(self):
        html = _render(google=True)
        for pattern in (
            r"\bconst MEALS\s*=",
            r"\bconst ROSTER\s*=",
            r"\bconst SUBMIT_URL\s*=",
            r"\bconst STATUS_URL\s*=",
            r"\bconst ROSTER_URL\s*=",
            r"\bconst ADMIN_URL\s*=",
            r"\bconst ADMIN_PDF_URL\s*=",
            r"\bconst API_KEY\s*=",
            r"\bconst GOOGLE_CLIENT_ID\s*=",
        ):
            # Locals derived from CONFIG inside form.js are fine; generator must not
            # inject the seven top-level const lines before the inlined scripts.
            pre_js = html.split("/* FORM_JS_MARKER */")[0]
            assert not re.search(pattern, pre_js), pattern

    def test_template_markers_inlined(self):
        html = _render()
        assert "FORM_CSS_MARKER" in html
        assert "--color-brand" in html
        assert "FORM_JS_MARKER" in html
        assert "ADMIN_JS_MARKER" in html
        assert "FORM_HTML_MARKER" in html
        assert '<link rel="stylesheet"' not in html
        # Only allowed external script is GSI in google mode
        local = _render(google=False)
        assert "<script src=" not in local

    def test_script_order_form_then_admin(self):
        html = _render()
        form_pos = html.index("FORM_JS_MARKER")
        admin_pos = html.index("ADMIN_JS_MARKER")
        assert form_pos < admin_pos

    def test_single_submit_order_definition(self):
        html = _render(google=True)
        # One async function submitOrder in the inlined form.js
        assert len(re.findall(r"async function submitOrder\s*\(", html)) == 1

    def test_no_onclick_admin_data_embedding(self):
        html = _render(google=True)
        assert 'onclick="admin' not in html
        # Static markup must not interpolate runtime data into onclick
        assert not re.search(r'onclick="[^"]*\$\{', html)

    def test_script_breakout_meal_escaped(self):
        html = _render()
        assert "</script><script>alert(1)</script>" not in html
        cfg_match = re.search(r"window\.CONFIG\s*=\s*(\{.*?\});", html, flags=re.DOTALL)
        assert cfg_match
        blob = cfg_match.group(1)
        # Literal </script> inside the CONFIG script would terminate early.
        assert "</script>" not in blob
        # Parsed JSON still contains the hostile meal name.
        cfg = json.loads(blob)
        assert any(
            m["name"] == "</script><script>alert(1)</script>" for m in cfg["meals"]
        )

    def test_hostile_names_present_in_config(self):
        cfg = _extract_config(_render())
        names = {m["name"] for m in cfg["meals"]}
        assert "Luis' Lomo Saltado" in names
        assert 'Meal with "quotes"' in names
        assert "</script><script>alert(1)</script>" in names
        assert "<!--<script>alert(1)</script>-->" in names

    def test_meal_card_template_and_qty_input(self):
        html = _render()
        assert 'id="meal-card-tpl"' in html
        assert 'type="number"' in html
        assert "data-meal-index" in html
        assert "data-qty-delta" in html

    def test_design_tokens_only_in_definitions(self):
        css = (SERVER_DIR / "templates" / "form.css").read_text()
        # Strip :root block, then assert brand/muted/border hexes are gone
        without_root = re.sub(r":root\s*\{[^}]*\}", "", css, count=1)
        assert "#1a1a2e" not in without_root
        assert "#6b7280" not in without_root
        assert "#d1d5db" not in without_root

    def test_python_has_no_html_js_fragments(self):
        src = (SERVER_DIR / "generate_form.py").read_text()
        assert "auth_section_html" not in src
        assert "google_auth_js" not in src
        assert "submit_order_js" not in src
        assert "origLoadWeekOrders" not in src


class TestGenerateFormPlaywright:
    @pytest.fixture
    def browser_page(self, tmp_path_factory):
        sync_api = pytest.importorskip("playwright.sync_api")
        sync_playwright = sync_api.sync_playwright

        html = _render(google=False, api_key="")
        # Stub status/roster so the page does not hang on network; roster fallback
        # in loadRoster still applies if fetch fails — intercept to be deterministic.
        out = tmp_path_factory.mktemp("form") / "order-form.html"
        out.write_text(html)

        with sync_playwright() as p:
            try:
                browser = p.chromium.launch(headless=True)
            except Exception as exc:
                raise RuntimeError(
                    "Chromium is required for form Playwright tests. "
                    "Run: playwright install --with-deps chromium"
                ) from exc
            try:
                page = browser.new_page()
                page.route(
                    "**/api/form-status/**",
                    lambda route: route.fulfill(
                        status=200,
                        content_type="application/json",
                        body='{"status":"open"}',
                    ),
                )
                page.route(
                    "**/api/roster**",
                    lambda route: route.fulfill(
                        status=200,
                        content_type="application/json",
                        body=json.dumps(
                            {
                                "employees": [
                                    {
                                        "name": "Ada Lovelace",
                                        "email": "ada@example.com",
                                    }
                                ]
                            }
                        ),
                    ),
                )
                page.goto(out.as_uri())
                page.wait_for_selector('[data-meal-index="0"]')
                yield page
            finally:
                browser.close()

    def test_admin_bundle_loads(self, browser_page):
        assert browser_page.evaluate("typeof window.loadWeekOrders") == "function"

    def test_qty_plus_updates_total_without_list_teardown(self, browser_page):
        page = browser_page
        card = page.locator('[data-meal-index="0"]')
        card_handle = card.element_handle()
        assert card_handle is not None

        page.locator('[data-meal-index="0"] [data-qty-delta="1"]').click()
        page.wait_for_function(
            "() => document.getElementById('total-display').textContent !== '$0.00'"
        )

        assert page.locator("#total-display").inner_text() == "$5.40"
        assert page.locator("#count-display").inner_text() == "1 meal"
        assert page.locator('[data-meal-index="0"] .qty').input_value() == "1"
        assert "selected" in (card.get_attribute("class") or "")

        # Same DOM node — partial update, not full list teardown
        page.evaluate(
            """() => {
              const el = document.querySelector('[data-meal-index="0"]');
              el.dataset.teardownProbe = '1';
            }"""
        )
        page.locator('[data-meal-index="0"] [data-qty-delta="1"]').click()
        page.wait_for_function(
            "() => document.querySelector('[data-meal-index=\"0\"] .qty').value === '2'"
        )
        assert (
            page.locator('[data-meal-index="0"]').get_attribute("data-teardown-probe")
            == "1"
        )
        assert page.locator("#count-display").inner_text() == "2 meals"
        assert page.locator("#total-display").inner_text() == "$10.80"

    def test_qty_typein_clamps_negative(self, browser_page):
        page = browser_page
        # Reset first card via type-in
        qty = page.locator('[data-meal-index="0"] .qty')
        qty.fill("-3")
        qty.blur()
        page.wait_for_function(
            "() => document.querySelector('[data-meal-index=\"0\"] .qty').value === '0'"
        )
        assert qty.input_value() == "0"
        qty.fill("2")
        qty.blur()
        page.wait_for_function(
            "() => document.getElementById('count-display').textContent === '2 meals'"
        )
        assert page.locator("#total-display").inner_text() == "$10.80"

    @pytest.mark.parametrize("width", [320, 375, 479])
    def test_local_roster_has_no_horizontal_overflow(self, browser_page, width):
        page = browser_page
        page.set_viewport_size({"width": width, "height": 800})
        dimensions = page.evaluate(
            """() => ({
              scrollWidth: document.documentElement.scrollWidth,
              clientWidth: document.documentElement.clientWidth,
            })"""
        )
        assert dimensions["scrollWidth"] == dimensions["clientWidth"]


class TestGenerateFormGooglePlaywright:
    @pytest.fixture(scope="class")
    @classmethod
    def signed_in_admin_page(cls, tmp_path_factory):
        try:
            from playwright.sync_api import sync_playwright
        except ImportError as exc:  # pragma: no cover
            raise RuntimeError(
                "playwright package is required; install requirements.txt"
            ) from exc

        out = tmp_path_factory.mktemp("google-form") / "order-form.html"
        out.write_text(_render(google=True, api_key=""))

        with sync_playwright() as p:
            try:
                browser = p.chromium.launch(headless=True)
            except Exception as exc:
                raise RuntimeError(
                    "Chromium is required for form Playwright tests. "
                    "Run: playwright install --with-deps chromium"
                ) from exc
            try:
                page = browser.new_page()
                page.add_init_script(
                    """window.google = {
                      accounts: {
                        id: {
                          initialize() {},
                          renderButton() {},
                          disableAutoSelect() {},
                        },
                      },
                    };"""
                )
                page.route(
                    "https://accounts.google.com/gsi/client",
                    lambda route: route.abort(),
                )

                def handle_api(route):
                    if "/api/form-status/" in route.request.url:
                        route.fulfill(
                            status=200,
                            content_type="application/json",
                            body='{"status":"open"}',
                        )
                    elif "/api/admin/orders" in route.request.url:
                        route.fulfill(
                            status=200,
                            content_type="application/json",
                            body='{"weeks":["2026-W30"]}',
                        )
                    else:
                        route.fulfill(
                            status=404,
                            content_type="application/json",
                            body="{}",
                        )

                page.route("https://api.example.com/**", handle_api)
                page.goto(out.as_uri(), wait_until="domcontentloaded")
                page.evaluate(
                    "(credential) => handleCredentialResponse({ credential })",
                    _google_credential(),
                )
                page.locator("#admin-btn").wait_for(state="visible")
                yield page
            finally:
                browser.close()

    @pytest.mark.parametrize("width", [320, 375])
    def test_signed_in_admin_user_bar_fits_phone_width(
        self, signed_in_admin_page, width
    ):
        page = signed_in_admin_page
        page.set_viewport_size({"width": width, "height": 800})

        for selector in (
            "#user-avatar",
            "#user-name",
            "#user-email",
            "#admin-btn",
            "#sign-out-btn",
        ):
            locator = page.locator(selector)
            assert locator.is_visible()
            bounds = locator.evaluate(
                """element => {
                  const rect = element.getBoundingClientRect();
                  return {
                    left: rect.left,
                    top: rect.top,
                    right: rect.right,
                    bottom: rect.bottom,
                    viewportWidth: window.innerWidth,
                    viewportHeight: window.innerHeight,
                  };
                }"""
            )
            assert bounds["left"] >= 0
            assert bounds["top"] >= 0
            assert bounds["right"] <= bounds["viewportWidth"]
            assert bounds["bottom"] <= bounds["viewportHeight"]

        for selector in ("#user-name", "#user-email"):
            assert page.locator(selector).evaluate(
                """element =>
                  element.scrollWidth <= element.clientWidth &&
                  element.scrollHeight <= element.clientHeight"""
            )
        assert page.locator("#admin-btn").is_enabled()
        assert page.locator("#sign-out-btn").is_enabled()

        dimensions = page.evaluate(
            """() => ({
              scrollWidth: document.documentElement.scrollWidth,
              clientWidth: document.documentElement.clientWidth,
            })"""
        )
        assert dimensions["scrollWidth"] == dimensions["clientWidth"]

    def test_user_bar_stays_single_row_at_480(self, signed_in_admin_page):
        page = signed_in_admin_page
        page.set_viewport_size({"width": 480, "height": 800})
        assert (
            page.locator(".user-bar").evaluate(
                "(element) => getComputedStyle(element).flexWrap"
            )
            == "nowrap"
        )
        dimensions = page.evaluate(
            """() => ({
              scrollWidth: document.documentElement.scrollWidth,
              clientWidth: document.documentElement.clientWidth,
            })"""
        )
        assert dimensions["scrollWidth"] == dimensions["clientWidth"]

    def test_user_bar_wraps_below_shared_mobile_breakpoint(self, signed_in_admin_page):
        page = signed_in_admin_page
        page.set_viewport_size({"width": 479, "height": 800})
        assert (
            page.locator(".user-bar").evaluate(
                "(element) => getComputedStyle(element).flexWrap"
            )
            == "wrap"
        )