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# 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/.
from __future__ import absolute_import

import json
import tempfile
import time
import pathlib

from mozperftest.test.browsertime import add_options
from mozperftest.system.android import _ROOT_URL
from mozperftest.utils import (
    download_file,
    get_multi_tasks_url,
    get_revision_namespace_url,
    install_package,
)

URL = "'https://www.example.com'"

COMMON_OPTIONS = [
    ("processStartTime", "true"),
    ("firefox.disableBrowsertimeExtension", "true"),
    ("firefox.android.intentArgument", "'-a'"),
    ("firefox.android.intentArgument", "'android.intent.action.VIEW'"),
    ("firefox.android.intentArgument", "'-d'"),
    ("firefox.android.intentArgument", URL),
]

NIGHTLY_SIM_ROUTE = "mobile.v2.fenix.nightly-simulation"
ROUTE_SUFFIX = "artifacts/public/build/{architecture}/target.apk"

build_generator = None


def before_iterations(kw):
    global build_generator

    install_list = kw.get("android_install_apk")
    if len(install_list) == 0 or all(
        ["fenix_nightlysim_multicommit" not in apk for apk in install_list]
    ):
        return

    # Install gitpython
    install_package(kw["virtualenv"], "gitpython==3.1.0")
    import git

    class _GitProgress(git.RemoteProgress):
        def update(self, op_code, cur_count, max_count=None, message=""):
            if message:
                print(message)

    # Setup the local fenix github repo
    print("Cloning fenix repo...")
    fenix_repo = git.Repo.clone_from(
        "https://github.com/mozilla-mobile/fenix",
        tempfile.mkdtemp(),
        branch="master",
        progress=_GitProgress(),
    )

    # Get the builds to test
    architecture = (
        "arm64-v8a" if "arm64_v8a" in kw.get("android_install_apk") else "armeabi-v7a"
    )
    json_ = _fetch_json(
        get_revision_namespace_url, NIGHTLY_SIM_ROUTE, day=kw["test_date"]
    )
    namespaces = json_["namespaces"]
    revisions = [namespace["name"] for namespace in namespaces]

    tasks = []
    for revision in revisions:
        try:
            commit = fenix_repo.commit(revision)
            name_rev = str(commit.name_rev)
            if (
                "remotes/origin" not in name_rev
                or "release" in name_rev
                or "tag" in name_rev
            ):
                print(
                    "Commit %s is a release-branch commit, it won't be tested."
                    % revision
                )
                continue

            commitdate = commit.committed_date
        except ValueError:
            print("Commit %s is not from the Fenix master branch" % revision)
            continue

        json_ = _fetch_json(
            get_multi_tasks_url, NIGHTLY_SIM_ROUTE, revision, day=kw["test_date"]
        )
        for task in json_["tasks"]:
            route = task["namespace"]
            task_architecture = route.split(".")[-1]
            if task_architecture == architecture:
                tasks.append(
                    {
                        "timestamp": commitdate,
                        "revision": revision,
                        "route": route,
                        "route_suffix": ROUTE_SUFFIX.format(
                            architecture=task_architecture
                        ),
                    }
                )

    # Set the number of test-iterations to the number of builds
    kw["test_iterations"] = len(tasks)

    def _build_iterator():
        for task in tasks:
            revision = task["revision"]
            timestamp = task["timestamp"]

            humandate = time.ctime(int(timestamp))
            print(f"Testing revision {revision} from {humandate}")

            download_url = f'{_ROOT_URL}{task["route"]}/{task["route_suffix"]}'
            yield revision, timestamp, [download_url]

    build_generator = _build_iterator()

    return kw


def _fetch_json(get_url_function, *args, **kwargs):
    build_url = get_url_function(*args, **kwargs)
    tmpfile = pathlib.Path(tempfile.mkdtemp(), "temp.json")
    download_file(build_url, tmpfile)

    with tmpfile.open() as f:
        return json.load(f)


def before_runs(env, **kw):
    global build_generator

    add_options(env, COMMON_OPTIONS)
    if build_generator:
        revision, timestamp, build = next(build_generator)
        env.set_arg("android-install-apk", build)
        env.set_arg("perfherder-prefix", revision)
        env.set_arg("perfherder-timestamp", timestamp)