# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

"""Python environment for ATK a11y browser tests."""

import os
import subprocess
import sys

import psutil

# pyatspi can't be installed using pip. Rely on the system installation.
# Get the path to the system installation of pyatspi.
# Some systems have pyatspi and gi in different locations, so get both.
extraPaths = eval(
    subprocess.check_output(
        (
            os.path.join(sys.base_prefix, "bin", "python3"),
            "-c",
            "import pyatspi, gi; print(repr([pyatspi.__file__, gi.__file__]))",
        ),
        encoding="utf-8",
    ).rstrip()
)

sys.path += [os.path.dirname(os.path.dirname(p)) for p in extraPaths]
import pyatspi

del sys.path[-len(extraPaths) :]
del extraPaths


def setup():
    # We do all the setup we need at module level.
    pass


def getDoc():
    """Get the Accessible for the document being tested."""
    # We can compare the parent process ids to find the Firefox started by the
    # test harness.
    commonPid = psutil.Process().ppid()
    for app in pyatspi.Registry.getDesktop(0):
        if (
            app.name == "Firefox"
            and psutil.Process(app.get_process_id()).ppid() == commonPid
        ):
            break
    else:
        raise LookupError("Couldn't find Firefox application Accessible")
    root = app[0]
    for embeds in root.getRelationSet():
        if embeds.getRelationType() == pyatspi.RELATION_EMBEDS:
            break
    else:
        raise LookupError("Firefox root doesn't have RELATION_EMBEDS")
    doc = embeds.getTarget(0)
    child = doc[0]
    if child.get_attributes().get("id") == "default-iframe-id":
        # This is an iframe or remoteIframe test.
        doc = child[0]
    return doc


def findByDomId(root, id):
    for child in root:
        if child.get_attributes().get("id") == id:
            return child
        descendant = findByDomId(child, id)
        if descendant:
            return descendant
