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import os
import platform
import socket
import subprocess
import time
from test.selenium.webdriver.common.network import get_lan_ip
from test.selenium.webdriver.common.webserver import SimpleWebServer
from urllib.request import urlopen

import pytest

from selenium import webdriver

drivers = (
    "chrome",
    "edge",
    "firefox",
    "ie",
    "remote",
    "safari",
    "webkitgtk",
    "chromiumedge",
    "wpewebkit",
)


def pytest_addoption(parser):
    parser.addoption(
        "--driver",
        action="append",
        choices=drivers,
        dest="drivers",
        metavar="DRIVER",
        help="driver to run tests against ({})".format(", ".join(drivers)),
    )
    parser.addoption(
        "--browser-binary",
        action="store",
        dest="binary",
        help="location of the browser binary",
    )
    parser.addoption(
        "--driver-binary",
        action="store",
        dest="executable",
        help="location of the service executable binary",
    )
    parser.addoption(
        "--browser-args",
        action="store",
        dest="args",
        help="arguments to start the browser with",
    )
    parser.addoption(
        "--headless",
        action="store",
        dest="headless",
        help="Allow tests to run in headless",
    )


def pytest_ignore_collect(path, config):
    drivers_opt = config.getoption("drivers")
    _drivers = set(drivers).difference(drivers_opt or drivers)
    if drivers_opt:
        _drivers.add("unit")
    parts = path.dirname.split(os.path.sep)
    return len([d for d in _drivers if d.lower() in parts]) > 0


driver_instance = None


@pytest.fixture(scope="function")
def driver(request):
    kwargs = {}

    try:
        driver_class = request.param.capitalize()
    except AttributeError:
        raise Exception("This test requires a --driver to be specified.")

    # skip tests if not available on the platform
    _platform = platform.system()
    if driver_class == "Safari" and _platform != "Darwin":
        pytest.skip("Safari tests can only run on an Apple OS")
    if (driver_class == "Ie") and _platform != "Windows":
        pytest.skip("IE and EdgeHTML Tests can only run on Windows")
    if "WebKit" in driver_class and _platform != "Linux":
        pytest.skip("Webkit tests can only run on Linux")

    # conditionally mark tests as expected to fail based on driver
    marker = request.node.get_closest_marker(f"xfail_{driver_class.lower()}")

    if marker is not None:
        if "run" in marker.kwargs:
            if marker.kwargs["run"] is False:
                pytest.skip()
                yield
                return
        if "raises" in marker.kwargs:
            marker.kwargs.pop("raises")
        pytest.xfail(**marker.kwargs)

        def fin():
            global driver_instance
            if driver_instance is not None:
                driver_instance.quit()
            driver_instance = None

        request.addfinalizer(fin)

    driver_path = request.config.option.executable
    options = None

    global driver_instance
    if driver_instance is None:
        if driver_class == "Firefox":
            options = get_options(driver_class, request.config)
        if driver_class == "Chrome":
            options = get_options(driver_class, request.config)
        if driver_class == "Remote":
            options = get_options("Firefox", request.config) or webdriver.FirefoxOptions()
            options.set_capability("moz:firefoxOptions", {})
            options.enable_downloads = True
        if driver_class == "WebKitGTK":
            options = get_options(driver_class, request.config)
        if driver_class == "Edge":
            options = get_options(driver_class, request.config)
        if driver_class == "WPEWebKit":
            options = get_options(driver_class, request.config)
        if driver_path is not None:
            kwargs["service"] = get_service(driver_class, driver_path)
        if options is not None:
            kwargs["options"] = options

        driver_instance = getattr(webdriver, driver_class)(**kwargs)
    yield driver_instance

    if request.node.get_closest_marker("no_driver_after_test"):
        driver_instance = None


def get_options(driver_class, config):
    browser_path = config.option.binary
    browser_args = config.option.args
    headless = bool(config.option.headless)
    options = None

    if driver_class == "ChromiumEdge":
        options = getattr(webdriver, "EdgeOptions")()

    if browser_path or browser_args:
        if not options:
            options = getattr(webdriver, f"{driver_class}Options")()
        if driver_class == "WebKitGTK":
            options.overlay_scrollbars_enabled = False
        if browser_path is not None:
            options.binary_location = browser_path
        if browser_args is not None:
            for arg in browser_args.split():
                options.add_argument(arg)

    if headless:
        if not options:
            options = getattr(webdriver, f"{driver_class}Options")()

        if driver_class == "Chrome" or driver_class == "Edge":
            options.add_argument("--headless=new")
        if driver_class == "Firefox":
            options.add_argument("-headless")
    return options


def get_service(driver_class, executable):
    # Let the default behaviour be used if we don't set the driver executable
    if not executable:
        return None

    module = getattr(webdriver, driver_class.lower())
    service = module.service.Service(executable_path=executable)

    return service


@pytest.fixture(scope="session", autouse=True)
def stop_driver(request):
    def fin():
        global driver_instance
        if driver_instance is not None:
            driver_instance.quit()
        driver_instance = None

    request.addfinalizer(fin)


def pytest_exception_interact(node, call, report):
    if report.failed:
        global driver_instance
        if driver_instance is not None:
            driver_instance.quit()
        driver_instance = None


@pytest.fixture
def pages(driver, webserver):
    class Pages:
        def url(self, name, localhost=False):
            return webserver.where_is(name, localhost)

        def load(self, name):
            driver.get(self.url(name))

    return Pages()


@pytest.fixture(autouse=True, scope="session")
def server(request):
    drivers = request.config.getoption("drivers")
    if drivers is None or "remote" not in drivers:
        yield None
        return

    _host = "localhost"
    _port = 4444
    _path = os.path.join(
        os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
        "java/src/org/openqa/selenium/grid/selenium_server_deploy.jar",
    )

    def wait_for_server(url, timeout):
        start = time.time()
        while time.time() - start < timeout:
            try:
                urlopen(url)
                return 1
            except OSError:
                time.sleep(0.2)
        return 0

    _socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    url = f"http://{_host}:{_port}/status"
    try:
        _socket.connect((_host, _port))
        print(
            "The remote driver server is already running or something else"
            "is using port {}, continuing...".format(_port)
        )
    except Exception:
        print("Starting the Selenium server")
        process = subprocess.Popen(
            [
                "java",
                "-jar",
                _path,
                "standalone",
                "--port",
                "4444",
                "--selenium-manager",
                "true",
                "--enable-managed-downloads",
                "true",
            ]
        )
        print(f"Selenium server running as process: {process.pid}")
        assert wait_for_server(url, 10), f"Timed out waiting for Selenium server at {url}"
        print("Selenium server is ready")
        yield process
        process.terminate()
        process.wait()
        print("Selenium server has been terminated")


@pytest.fixture(autouse=True, scope="session")
def webserver():
    webserver = SimpleWebServer(host=get_lan_ip())
    webserver.start()
    yield webserver
    webserver.stop()


@pytest.fixture
def edge_service():
    from selenium.webdriver.edge.service import Service as EdgeService

    return EdgeService


@pytest.fixture(scope="function")
def driver_executable(request):
    return request.config.option.executable


@pytest.fixture(scope="function")
def clean_service(request):
    try:
        driver_class = request.config.option.drivers[0].capitalize()
    except AttributeError:
        raise Exception("This test requires a --driver to be specified.")

    yield get_service(driver_class, request.config.option.executable)


@pytest.fixture(scope="function")
def clean_driver(request):
    try:
        driver_class = request.config.option.drivers[0].capitalize()
    except AttributeError:
        raise Exception("This test requires a --driver to be specified.")

    driver_reference = getattr(webdriver, driver_class)
    yield driver_reference

    if request.node.get_closest_marker("no_driver_after_test"):
        driver_reference = None