"""Browser tests for the UK bus stop finder using Python Playwright."""

from __future__ import annotations

import re
import threading
from collections.abc import Iterator
from typing import Any

import pytest
from werkzeug.serving import make_server

from uk_bus_stops.app import create_app

playwright_api = pytest.importorskip("playwright.sync_api")


@pytest.fixture(scope="module")
def flask_url() -> Iterator[str]:
    """Run the Flask application on a temporary local port."""
    server = make_server("127.0.0.1", 0, create_app({"TESTING": True}))
    thread = threading.Thread(target=server.serve_forever, daemon=True)
    thread.start()
    yield f"http://127.0.0.1:{server.server_port}"
    server.shutdown()
    thread.join()


@pytest.fixture(scope="module")
def chromium_browser() -> Iterator[Any]:
    """Launch the installed Chromium browser through Python Playwright."""
    with playwright_api.sync_playwright() as playwright:
        instance = playwright.chromium.launch(headless=True)
        yield instance
        instance.close()


def test_search_and_stop_details_in_browser(chromium_browser: Any, flask_url: str) -> None:
    """A location search renders stops, an ATCO code, tags, and route metadata."""
    page = chromium_browser.new_page(viewport={"width": 1280, "height": 800})
    page_errors: list[str] = []
    search_requests: list[str] = []
    page.on("pageerror", lambda error: page_errors.append(str(error)))
    page.on("request", lambda request: (
        search_requests.append(request.url) if "/api/search?" in request.url else None
    ))
    stop = {
        "type": "node", "id": 123, "lat": 51.451, "lon": -2.591,
        "name": "Central Stop", "atco_code": "0100BRP90314", "indicator": "N",
        "bearing": "NW",
        "transport_type": "Bus stop",
        "tags": {"highway": "bus_stop", "shelter": "yes"},
    }
    page.route("**/api/search?*", lambda route: route.fulfill(json={
        "kind": "geocode",
        "query": "Bristol",
        "locations": [
            {"lat": 51.45, "lon": -2.59, "label": "Bristol Centre", "type": "city"},
            {"lat": 51.2, "lon": -2.7, "label": "Bristol Road, Somerset", "type": "road"},
        ],
    }))
    page.route("**/api/stops?*", lambda route: route.fulfill(json={
        "kind": "location",
        "location": {"lat": 51.451, "lon": -2.591, "label": "Central Stop"},
        "stops": [stop, {
            "type": "node", "id": 124, "lat": 51.452, "lon": -2.592,
            "name": "Nearby Stop", "atco_code": "0100BRP90315", "indicator": "S",
            "bearing": "SE", "transport_type": "Bus stop",
            "tags": {"highway": "bus_stop"},
        }],
    }))
    page.route("**/api/stops/in-bounds?*", lambda route: route.fulfill(json={
        "kind": "map",
        "stops": [stop, {
            "type": "node", "id": 124, "lat": 51.452, "lon": -2.592,
            "name": "Nearby Stop", "atco_code": "0100BRP90315", "indicator": "S",
            "bearing": "SE", "transport_type": "Bus stop",
            "tags": {"highway": "bus_stop"},
        }],
    }))
    page.route("**/api/stop/node/123", lambda route: route.fulfill(json={"stop": stop}))
    page.route("**/api/stop/node/123/routes", lambda route: route.fulfill(json={"routes": [{
        "id": 9, "ref": "A1", "name": "Airport bus", "operator": "Example Bus",
        "from": "Airport", "to": "City Centre",
    }]}))
    page.goto(flask_url, wait_until="networkidle")
    page.get_by_label("Location or ATCO code").fill("Bristol")
    page.get_by_role("button", name="Search").click()
    playwright_api.expect(page).to_have_url(re.compile(r"\?q=Bristol$"))
    assert all(key in search_requests[-1] for key in ("west=", "south=", "east=", "north="))
    playwright_api.expect(page.get_by_text("2 UK matches for “Bristol”", exact=True)).to_be_visible()
    page.get_by_text("Bristol Centre", exact=True).click()
    playwright_api.expect(page).to_have_url(re.compile(r"\?lat=51.45&lon=-2.59$"))
    playwright_api.expect(page.get_by_text("Central Stop", exact=True)).to_be_visible()
    assert page.locator("#stop-list .stop-title").all_inner_texts() == ["Central Stop", "Nearby Stop"]
    playwright_api.expect(page.locator("#stop-list .stop-meta").first).to_contain_text("m · Bus stop")
    playwright_api.expect(page.locator("#stop-list .stop-meta").first).to_contain_text("NW-bound")
    assert page.evaluate("map.getZoom()") > 6
    page.evaluate("markers.getLayers()[0].openTooltip()")
    playwright_api.expect(page.get_by_text("Central Stop · NW-bound · Bus stop", exact=True)).to_be_visible()
    page.get_by_text("Central Stop", exact=True).click()
    playwright_api.expect(page).to_have_url(re.compile(r"\?node=123$"))
    playwright_api.expect(page.locator("#atco-code")).to_have_text("0100BRP90314")
    playwright_api.expect(page.locator("#stop-type")).to_have_text("Bus stop")
    playwright_api.expect(page.locator("#stop-bearing")).to_have_text("NW-bound")
    playwright_api.expect(page.locator(".selected-stop-marker")).to_be_visible()
    playwright_api.expect(page.get_by_text("Airport → City Centre · Example Bus", exact=True)).to_be_visible()
    assert page_errors == []
    page.reload(wait_until="networkidle")
    playwright_api.expect(page.get_by_label("Location or ATCO code")).to_have_value("")
    playwright_api.expect(page.locator("#stop-name")).to_have_text("Central Stop")
    playwright_api.expect(page.locator("#atco-code")).to_have_text("0100BRP90314")
    playwright_api.expect(page.locator("#stop-bearing")).to_have_text("NW-bound")
    playwright_api.expect(page.get_by_role("button", name="All nearby stops")).to_be_visible()
    page.get_by_role("button", name="All nearby stops").click()
    playwright_api.expect(page.get_by_text("Nearby Stop", exact=True)).to_be_visible()
    playwright_api.expect(page).to_have_url(re.compile(r"\?lat=.*&lon=.*$"))
    page.close()


def test_moving_map_loads_only_when_zoomed_in(chromium_browser: Any, flask_url: str) -> None:
    """Panning a close map loads visible stops while a wide map makes no query."""
    page = chromium_browser.new_page(viewport={"width": 1280, "height": 800})
    requests: list[str] = []

    def fulfil_bounds(route: Any) -> None:
        """Record viewport calls and return a railway station."""
        requests.append(route.request.url)
        route.fulfill(json={"kind": "map", "stops": [{
            "type": "node", "id": 456, "lat": 51.45, "lon": -2.59,
            "name": "Temple Meads", "atco_code": "9100BRSTLTM", "indicator": None,
            "transport_type": "Railway station", "tags": {"railway": "station"},
        }]})

    page.route("**/api/stops/in-bounds?*", fulfil_bounds)
    page.route("**/api/stop/node/456/routes", lambda route: route.fulfill(json={"routes": []}))
    page.goto(flask_url, wait_until="networkidle")
    page.evaluate("userMapInteractionPending = true; map.setView([51.45, -2.59], 15)")
    playwright_api.expect(page.get_by_text("Temple Meads", exact=True)).to_be_visible()
    assert len(requests) == 1
    page.evaluate("userMapInteractionPending = true; map.setZoom(10)")
    playwright_api.expect(page.locator("#map-status")).to_have_text(
        "Zoom in to load transport stops"
    )
    page.wait_for_timeout(500)
    assert len(requests) == 1
    page.evaluate("userMapInteractionPending = true; map.setZoom(15)")
    page.wait_for_timeout(700)
    assert len(requests) == 2
    page.get_by_text("Temple Meads", exact=True).click()
    playwright_api.expect(page.locator("#stop-name")).to_have_text("Temple Meads")
    page.wait_for_timeout(700)
    playwright_api.expect(page.locator("#stop-detail")).to_be_visible()
    assert len(requests) == 3
    page.evaluate("userMapInteractionPending = true; map.panBy([80, 0])")
    page.wait_for_timeout(700)
    playwright_api.expect(page.locator("#stop-name")).to_have_text("Temple Meads")
    playwright_api.expect(page.locator("#stop-detail")).to_be_visible()
    playwright_api.expect(page).to_have_url(re.compile(r"\?node=456$"))
    assert len(requests) == 4
    page.close()


def test_coordinate_url_and_search_input(chromium_browser: Any, flask_url: str) -> None:
    """lat/lon URLs load on refresh and coordinate input creates a shareable URL."""
    page = chromium_browser.new_page(viewport={"width": 1280, "height": 800})
    requested_urls: list[str] = []

    def fulfil_stops(route: Any) -> None:
        """Record coordinate API calls and return an empty nearby result."""
        requested_urls.append(route.request.url)
        route.fulfill(json={
            "kind": "location",
            "location": {"lat": 51.4545, "lon": -2.5879, "label": "Coordinates"},
            "stops": [],
        })

    page.route("**/api/stops?*", fulfil_stops)
    page.goto(f"{flask_url}?lat=51.4545&lon=-2.5879", wait_until="networkidle")
    playwright_api.expect(page.get_by_label("Location or ATCO code")).to_have_value(
        "51.4545, -2.5879"
    )
    playwright_api.expect(page.locator("#stop-count")).to_have_text("0 found")
    assert page.evaluate("map.getZoom()") == 16
    assert "lat=51.4545" in requested_urls[-1]

    page.get_by_label("Location or ATCO code").fill("51.46, -2.58")
    page.get_by_role("button", name="Search").click()
    playwright_api.expect(page).to_have_url(re.compile(r"\?lat=51.46&lon=-2.58$"))
    playwright_api.expect(page.locator("#stop-count")).to_have_text("0 found")
    page.close()


def test_single_postcode_match_opens_directly(chromium_browser: Any, flask_url: str) -> None:
    """A unique UK postcode result skips the location-choice panel."""
    page = chromium_browser.new_page(viewport={"width": 1280, "height": 800})
    page.route("**/api/search?*", lambda route: route.fulfill(json={
        "kind": "geocode",
        "query": "SW1A 1AA",
        "locations": [{
            "lat": 51.501, "lon": -0.142, "label": "Westminster, London",
            "type": "postcode",
        }],
    }))
    page.route("**/api/stops?*", lambda route: route.fulfill(json={
        "kind": "location",
        "location": {"lat": 51.501, "lon": -0.142, "label": "Westminster, London"},
        "stops": [],
    }))
    page.goto(flask_url, wait_until="networkidle")
    page.get_by_label("Location or ATCO code").fill("SW1A 1AA")
    page.get_by_role("button", name="Search").click()
    playwright_api.expect(page).to_have_url(re.compile(r"\?lat=51.501&lon=-0.142$"))
    playwright_api.expect(page.locator("#stop-count")).to_have_text("0 found")
    playwright_api.expect(page.locator("#geocode-panel")).to_be_hidden()
    page.close()


def test_mobile_layout_opens_results_sheet(chromium_browser: Any, flask_url: str) -> None:
    """The finder exposes its search panel as an open mobile bottom sheet."""
    page = chromium_browser.new_page(viewport={"width": 390, "height": 844})
    page.goto(flask_url, wait_until="domcontentloaded")
    playwright_api.expect(page.locator("#sidebar")).to_have_class(re.compile("panel-open"))
    playwright_api.expect(page.get_by_label("Location or ATCO code")).to_be_visible()
    page.close()