# 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, unicode_literals

import argparse
import logging
import os
import sys

import six

from mozbuild.base import (
    MachCommandConditions as conditions,
    BinaryNotFoundException,
)

from mach.decorators import (
    CommandArgument,
    CommandArgumentGroup,
    Command,
)

import mozinfo


def setup_awsy_argument_parser():
    from marionette_harness.runtests import MarionetteArguments
    from mozlog.structured import commandline

    parser = MarionetteArguments()
    commandline.add_logging_group(parser)

    return parser


AWSY_PATH = os.path.dirname(os.path.realpath(__file__))
if AWSY_PATH not in sys.path:
    sys.path.append(AWSY_PATH)
from awsy import ITERATIONS, PER_TAB_PAUSE, SETTLE_WAIT_TIME, MAX_TABS


def run_awsy(command_context, tests, binary=None, **kwargs):
    import json
    from mozlog.structured import commandline

    from marionette_harness.runtests import MarionetteTestRunner, MarionetteHarness

    parser = setup_awsy_argument_parser()

    awsy_source_dir = os.path.join(command_context.topsrcdir, "testing", "awsy")
    if not tests:
        tests = [os.path.join(awsy_source_dir, "awsy", "test_memory_usage.py")]

    args = argparse.Namespace(tests=tests)

    args.binary = binary

    if kwargs["quick"]:
        kwargs["entities"] = 3
        kwargs["iterations"] = 1
        kwargs["perTabPause"] = 1
        kwargs["settleWaitTime"] = 1

    if "single_stylo_traversal" in kwargs and kwargs["single_stylo_traversal"]:
        os.environ["STYLO_THREADS"] = "1"
    else:
        os.environ["STYLO_THREADS"] = "4"

    runtime_testvars = {}
    for arg in (
        "webRootDir",
        "pageManifest",
        "resultsDir",
        "entities",
        "iterations",
        "perTabPause",
        "settleWaitTime",
        "maxTabs",
        "dmd",
        "tp6",
    ):
        if arg in kwargs and kwargs[arg] is not None:
            runtime_testvars[arg] = kwargs[arg]

    if "webRootDir" not in runtime_testvars:
        awsy_tests_dir = os.path.join(command_context.topobjdir, "_tests", "awsy")
        web_root_dir = os.path.join(awsy_tests_dir, "html")
        runtime_testvars["webRootDir"] = web_root_dir
    else:
        web_root_dir = runtime_testvars["webRootDir"]
        awsy_tests_dir = os.path.dirname(web_root_dir)

    if "resultsDir" not in runtime_testvars:
        runtime_testvars["resultsDir"] = os.path.join(awsy_tests_dir, "results")

    runtime_testvars["bin"] = binary
    runtime_testvars["run_local"] = True

    page_load_test_dir = os.path.join(web_root_dir, "page_load_test")
    if not os.path.isdir(page_load_test_dir):
        os.makedirs(page_load_test_dir)

    if not os.path.isdir(runtime_testvars["resultsDir"]):
        os.makedirs(runtime_testvars["resultsDir"])

    runtime_testvars_path = os.path.join(awsy_tests_dir, "runtime-testvars.json")
    if kwargs["testvars"]:
        kwargs["testvars"].append(runtime_testvars_path)
    else:
        kwargs["testvars"] = [runtime_testvars_path]

    runtime_testvars_file = open(runtime_testvars_path, "wb" if six.PY2 else "w")
    runtime_testvars_file.write(json.dumps(runtime_testvars, indent=2))
    runtime_testvars_file.close()

    manifest_file = os.path.join(awsy_source_dir, "tp5n-pageset.manifest")
    tooltool_args = {
        "args": [
            sys.executable,
            os.path.join(command_context.topsrcdir, "mach"),
            "artifact",
            "toolchain",
            "-v",
            "--tooltool-manifest=%s" % manifest_file,
            "--cache-dir=%s"
            % os.path.join(command_context.topsrcdir, "tooltool-cache"),
        ]
    }
    command_context.run_process(cwd=page_load_test_dir, **tooltool_args)
    tp5nzip = os.path.join(page_load_test_dir, "tp5n.zip")
    tp5nmanifest = os.path.join(page_load_test_dir, "tp5n", "tp5n.manifest")
    if not os.path.exists(tp5nmanifest):
        unzip_args = {"args": ["unzip", "-q", "-o", tp5nzip, "-d", page_load_test_dir]}
        try:
            command_context.run_process(**unzip_args)
        except Exception as exc:
            troubleshoot = ""
            if mozinfo.os == "win":
                troubleshoot = (
                    " Try using --web-root to specify a "
                    "directory closer to the drive root."
                )

            command_context.log(
                logging.ERROR,
                "awsy",
                {"directory": page_load_test_dir, "exception": exc},
                "Failed to unzip `tp5n.zip` into "
                "`{directory}` with `{exception}`." + troubleshoot,
            )
            raise exc

    # If '--preferences' was not specified supply our default set.
    if not kwargs["prefs_files"]:
        kwargs["prefs_files"] = [os.path.join(awsy_source_dir, "conf", "prefs.json")]

    # Setup DMD env vars if necessary.
    if kwargs["dmd"]:
        bin_dir = os.path.dirname(binary)

        if "DMD" not in os.environ:
            os.environ["DMD"] = "1"

        # Work around a startup crash with DMD on windows
        if mozinfo.os == "win":
            kwargs["pref"] = "security.sandbox.content.level:0"
            command_context.log(
                logging.WARNING,
                "awsy",
                {},
                "Forcing 'security.sandbox.content.level' = 0 because DMD is enabled.",
            )
        elif mozinfo.os == "mac":
            # On mac binary is in MacOS and dmd.py is in Resources, ie:
            #   Name.app/Contents/MacOS/libdmd.dylib
            #   Name.app/Contents/Resources/dmd.py
            bin_dir = os.path.join(bin_dir, "../Resources/")

        # Also add the bin dir to the python path so we can use dmd.py
        if bin_dir not in sys.path:
            sys.path.append(bin_dir)

    for k, v in six.iteritems(kwargs):
        setattr(args, k, v)

    parser.verify_usage(args)

    args.logger = commandline.setup_logging(
        "Are We Slim Yet Tests", args, {"mach": sys.stdout}
    )
    failed = MarionetteHarness(MarionetteTestRunner, args=vars(args)).run()
    if failed > 0:
        return 1
    else:
        return 0


@Command(
    "awsy-test",
    category="testing",
    description="Run Are We Slim Yet (AWSY) memory usage testing using marionette.",
    parser=setup_awsy_argument_parser,
)
@CommandArgumentGroup("AWSY")
@CommandArgument(
    "--web-root",
    group="AWSY",
    action="store",
    type=str,
    dest="webRootDir",
    help="Path to web server root directory. If not specified, "
    "defaults to topobjdir/_tests/awsy/html.",
)
@CommandArgument(
    "--page-manifest",
    group="AWSY",
    action="store",
    type=str,
    dest="pageManifest",
    help="Path to page manifest text file containing a list "
    "of urls to test. The urls must be served from localhost. If not "
    "specified, defaults to page_load_test/tp5n/tp5n.manifest under "
    "the web root.",
)
@CommandArgument(
    "--results",
    group="AWSY",
    action="store",
    type=str,
    dest="resultsDir",
    help="Path to results directory. If not specified, defaults "
    "to the parent directory of the web root.",
)
@CommandArgument(
    "--quick",
    group="AWSY",
    action="store_true",
    dest="quick",
    default=False,
    help="Set --entities=3, --iterations=1, --per-tab-pause=1, "
    "--settle-wait-time=1 for a quick test. Overrides any explicit "
    "argument settings.",
)
@CommandArgument(
    "--entities",
    group="AWSY",
    action="store",
    type=int,
    dest="entities",
    help="Number of urls to load. Defaults to the total number of urls.",
)
@CommandArgument(
    "--max-tabs",
    group="AWSY",
    action="store",
    type=int,
    dest="maxTabs",
    help="Maximum number of tabs to open. Defaults to %s." % MAX_TABS,
)
@CommandArgument(
    "--iterations",
    group="AWSY",
    action="store",
    type=int,
    dest="iterations",
    help="Number of times to run through the test suite. "
    "Defaults to %s." % ITERATIONS,
)
@CommandArgument(
    "--per-tab-pause",
    group="AWSY",
    action="store",
    type=int,
    dest="perTabPause",
    help="Seconds to wait in between opening tabs. Defaults to %s." % PER_TAB_PAUSE,
)
@CommandArgument(
    "--settle-wait-time",
    group="AWSY",
    action="store",
    type=int,
    dest="settleWaitTime",
    help="Seconds to wait for things to settled down. "
    "Defaults to %s." % SETTLE_WAIT_TIME,
)
@CommandArgument(
    "--dmd",
    group="AWSY",
    action="store_true",
    dest="dmd",
    default=False,
    help="Enable DMD during testing. Requires a DMD-enabled build.",
)
@CommandArgument(
    "--tp6",
    group="AWSY",
    action="store_true",
    dest="tp6",
    default=False,
    help="Use the tp6 pageset during testing.",
)
def run_awsy_test(command_context, tests, **kwargs):
    """mach awsy-test runs the in-tree version of the Are We Slim Yet
    (AWSY) tests.

    awsy-test is implemented as a marionette test and marionette
    test arguments also apply although they are not necessary
    since reasonable defaults will be chosen.

    The AWSY specific arguments can be found in the Command
    Arguments for AWSY section below.

    awsy-test will automatically download the tp5n.zip talos
    pageset from tooltool and install it under
    topobjdir/_tests/awsy/html. You can specify your own page set
    by specifying --web-root and --page-manifest.

    The results of the test will be placed in the results
    directory specified by the --results argument.

    On Windows, you may experience problems due to path length
    errors when extracting the tp5n.zip file containing the
    test pages or when attempting to write checkpoints to the
    results directory. In that case, you should specify both
    the --web-root and --results arguments pointing to a location
    with a short path. For example:

    --web-root=c:\\\\tmp\\\\html --results=c:\\\\tmp\\\\results

    Note that the double backslashes are required.
    """
    kwargs["logger_name"] = "Awsy Tests"
    if "test_objects" in kwargs:
        tests = []
        for obj in kwargs["test_objects"]:
            tests.append(obj["file_relpath"])
        del kwargs["test_objects"]

    if not kwargs.get("binary") and conditions.is_firefox(command_context):
        try:
            kwargs["binary"] = command_context.get_binary_path("app")
        except BinaryNotFoundException as e:
            command_context.log(
                logging.ERROR, "awsy", {"error": str(e)}, "ERROR: {error}"
            )
            command_context.log(logging.INFO, "awsy", {"help": e.help()}, "{help}")
            return 1
    return run_awsy(command_context, tests, **kwargs)