"""acceptance testing"""
# Copyright 2022 ipydrawio contributors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import shutil
import subprocess
import sys
import time

import lxml.etree as ET

from . import project as P

PABOT_DEFAULTS = [
    "--testlevelsplit",
    "--processes",
    P.ATEST_PROCS,
    "--artifactsinsubfolders",
    "--artifacts",
    "png,log,txt,dio,svg,xml,pdf,ipynb",
]


def run_tests(attempt=0, extra_args=None):
    extra_args = extra_args or []

    stem = P.get_atest_stem(attempt=attempt, extra_args=extra_args)
    out_dir = P.ATEST_OUT / stem

    if attempt > 1:
        prev_stem = P.get_atest_stem(attempt=attempt - 1, extra_args=extra_args)
        previous = P.ATEST_OUT / prev_stem / P.ATEST_OUT_XML
        if previous.exists():
            extra_args += ["--rerunfailed", str(previous)]

    runner = ["pabot", *PABOT_DEFAULTS]

    if "--dryrun" in extra_args:
        runner = ["robot"]

    try:
        __import__("jupyterlite")
    except Exception as err:
        print("skipping lite tests because", err)
        extra_args += ["--exclude", "app:lite"]

    args = [
        *runner,
        *extra_args,
        "--name",
        f"""{P.PLATFORM[:3]}{P.PY_MAJOR}""",
        "--outputdir",
        out_dir,
        "--variable",
        f"OS:{P.PLATFORM}",
        "--variable",
        f"PY:{P.PY_MAJOR}",
        "--variable",
        f"ROOT:{P.ROOT}",
        "--randomize",
        "all",
        "--xunit",
        "xunit.xml",
        ".",
    ]

    if out_dir.exists():
        print(">>> trying to clean out {}".format(out_dir), flush=True)
        try:
            shutil.rmtree(out_dir)
        except Exception as err:
            print(
                "... error, hopefully harmless: {}".format(err),
                flush=True,
            )

    if not out_dir.exists():
        print(">>> trying to prepare output directory: {}".format(out_dir), flush=True)
        try:
            out_dir.mkdir(parents=True)
        except Exception as err:
            print(
                "... Error, hopefully harmless: {}".format(err),
                flush=True,
            )

    str_args = [*map(str, args)]
    print(">>> ", " ".join(str_args), flush=True)

    proc = subprocess.Popen(str_args, cwd=P.ATEST)

    try:
        proc.wait()
    except KeyboardInterrupt:
        proc.kill()
        proc.wait()

    out_xml = out_dir / "output.xml"
    fail_count = -1

    try:
        root = ET.fromstring(out_xml.read_bytes())
        stat = root.xpath("//total/stat")
        fail_count = int(stat[0].attrib["fail"])
    except Exception as err:
        print(err)

    return fail_count


def attempt_atest_with_retries(extra_args=None):
    """retry the robot tests a number of times"""
    extra_args = list(extra_args or [])
    attempt = 0
    fail_count = -1

    retries = P.ATEST_RETRIES
    extra_args += P.ATEST_ARGS

    while fail_count != 0 and attempt <= retries:
        attempt += 1
        print("attempt {} of {}...".format(attempt, retries + 1), flush=True)
        start_time = time.time()
        fail_count = run_tests(attempt=attempt, extra_args=extra_args)
        print(
            fail_count,
            "failed in",
            int(time.time() - start_time),
            "seconds",
            flush=True,
        )

    return fail_count


if __name__ == "__main__":
    sys.exit(attempt_atest_with_retries(extra_args=sys.argv[1:]))