"""Seam 1 page check: load a dashboard page with no backend, push contract envelopes
through window.__pyMsg, and assert on what is visible.

Page under test: set PAGE_CHECK_HTML to a generated dashboard.html. Without it, the
no-AI template is filled with TEST_FILL. Every test runs in light, dark and narrow mode.
The page sees a fake Qt bridge: each slot call lands in window.__calls as [slot, ...args].
"""
import json
import os
import re
from pathlib import Path

import pytest

ROOT = Path(__file__).resolve().parents[2]
TEMPLATE = ROOT / "rpa-dashboard-no-ai" / "templates" / "dashboard.html"
TEST_FILL = {
    "APP_NAME": "Test Bot",
    "APP_SUBTITLE": "Page check",
    "LOGO_SRC": "",
    "API_BASE": "",
    "STEPS_JSON": json.dumps(["Initializing", "Login", "Process items", "Completed"]),
    "REPORT_COLUMNS_JSON": json.dumps([{"key": "item", "label": "Item"}, {"key": "status", "label": "Status"}]),
}
FAKE_BRIDGE = """
window.__calls = [];
window.qt = {webChannelTransport: {}};
window.QWebChannel = function (_transport, ready) {
  const pyBridge = new Proxy({}, {get: (_o, slot) => (...args) => { window.__calls.push([slot, ...args]); }});
  ready({objects: {pyBridge}});
};
"""
MODES = {"light": (1280, 820, False), "dark": (1280, 820, True), "narrow": (800, 900, False)}


@pytest.fixture(scope="session")
def page_url(tmp_path_factory):
    if os.environ.get("PAGE_CHECK_HTML"):
        return Path(os.environ["PAGE_CHECK_HTML"]).resolve().as_uri()
    html = re.sub(r"\{\{(\w+)\}\}", lambda m: TEST_FILL[m[1]], TEMPLATE.read_text(encoding="utf-8"))
    out = tmp_path_factory.mktemp("page") / "dashboard.html"
    out.write_text(html, encoding="utf-8")
    return out.as_uri()


@pytest.fixture(params=list(MODES))
def page(request, browser, page_url):
    width, height, dark = MODES[request.param]
    ctx = browser.new_context(viewport={"width": width, "height": height})
    ctx.add_init_script(FAKE_BRIDGE)
    pg = ctx.new_page()
    pg.set_default_timeout(5000)
    errors = []
    pg.on("pageerror", lambda e: errors.append(e))
    pg.goto(page_url)
    assert not errors, f"page script errors: {errors}"
    if dark:
        push_to(pg, "apply_dark", {"on": True})
    yield pg
    ctx.close()


def push_to(pg, event, data):
    pg.evaluate("([event, data]) => window.__pyMsg(JSON.stringify({event, data}))", [event, data])


@pytest.fixture
def push(page):
    """push(event, data): send one contract envelope to the page, as the bot would."""
    return lambda event, data: push_to(page, event, data)