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"""Configure the command line input for the resmoke 'run' subcommand."""

import argparse
import os
import os.path
import sys
import shlex
import configparser

from typing import NamedTuple

import datetime
import pymongo.uri_parser

from buildscripts import resmokeconfig
from . import config as _config
from . import utils


def validate_and_update_config(parser, args):
    """Validate inputs and update config module."""
    _validate_options(parser, args)
    _update_config_vars(args)
    _validate_config(parser)
    _set_logging_config()


def _validate_options(parser, args):
    """Do preliminary validation on the options and error on any invalid options."""

    if not 'shell_port' in args or not 'shell_conn_strin' in args:
        return

    if args.shell_port is not None and args.shell_conn_string is not None:
        parser.error("Cannot specify both `shellPort` and `shellConnString`")

    if args.executor_file:
        parser.error("--executor is superseded by --suites; specify --suites={} {} to run the"
                     " test(s) under those suite configuration(s)".format(
                         args.executor_file, " ".join(args.test_files)))


def _validate_config(parser):
    """Do validation on the config settings."""

    if _config.REPEAT_TESTS_MAX:
        if not _config.REPEAT_TESTS_SECS:
            parser.error("Must specify --repeatTestsSecs with --repeatTestsMax")

        if _config.REPEAT_TESTS_MIN > _config.REPEAT_TESTS_MAX:
            parser.error("--repeatTestsSecsMin > --repeatTestsMax")

    if _config.REPEAT_TESTS_MIN and not _config.REPEAT_TESTS_SECS:
        parser.error("Must specify --repeatTestsSecs with --repeatTestsMin")

    if _config.REPEAT_TESTS > 1 and _config.REPEAT_TESTS_SECS:
        parser.error("Cannot specify --repeatTests and --repeatTestsSecs")


def _update_config_vars(values):  # pylint: disable=too-many-statements,too-many-locals,too-many-branches
    """Update the variables of the config module."""

    config = _config.DEFAULTS.copy()

    # Use RSK_ prefixed environment variables to indicate resmoke-specific values.
    # The list of configuration is detailed in config.py
    resmoke_env_prefix = 'RSK_'
    for key in os.environ.keys():
        if key.startswith(resmoke_env_prefix):
            # Windows env vars are case-insensitive, we use lowercase to be consistent
            # with existing resmoke options.
            config[key[len(resmoke_env_prefix):].lower()] = os.environ[key]

    # Override `config` with values from command line arguments.
    cmdline_vars = vars(values)
    for cmdline_key in cmdline_vars:
        if cmdline_key not in _config.DEFAULTS:
            # Ignore options that don't map to values in config.py
            continue
        if cmdline_vars[cmdline_key] is not None:
            config[cmdline_key] = cmdline_vars[cmdline_key]

    if os.path.isfile("resmoke.ini"):
        config_parser = configparser.ConfigParser()
        config_parser.read("resmoke.ini")
        if "resmoke" in config_parser.sections():
            user_config = dict(config_parser["resmoke"])
            config.update(user_config)

    _config.ARCHIVE_FILE = config.pop("archive_file")
    _config.BASE_PORT = int(config.pop("base_port"))
    _config.BUILDLOGGER_URL = config.pop("buildlogger_url")
    _config.DBPATH_PREFIX = _expand_user(config.pop("dbpath_prefix"))
    _config.DRY_RUN = config.pop("dry_run")
    # EXCLUDE_WITH_ANY_TAGS will always contain the implicitly defined EXCLUDED_TAG.
    _config.EXCLUDE_WITH_ANY_TAGS = [_config.EXCLUDED_TAG]
    _config.EXCLUDE_WITH_ANY_TAGS.extend(
        utils.default_if_none(_tags_from_list(config.pop("exclude_with_any_tags")), []))
    _config.FAIL_FAST = not config.pop("continue_on_failure")
    _config.FLOW_CONTROL = config.pop("flow_control")
    _config.FLOW_CONTROL_TICKETS = config.pop("flow_control_tickets")
    _config.INCLUDE_WITH_ANY_TAGS = _tags_from_list(config.pop("include_with_any_tags"))
    _config.GENNY_EXECUTABLE = _expand_user(config.pop("genny_executable"))
    _config.JOBS = config.pop("jobs")
    _config.MAJORITY_READ_CONCERN = config.pop("majority_read_concern") == "on"

    _config.DBTEST_EXECUTABLE = _expand_user(config.pop("dbtest_executable"))
    _config.MONGO_EXECUTABLE = _expand_user(config.pop("mongo_executable"))
    _config.MONGOD_EXECUTABLE = _expand_user(config.pop("mongod_executable"))
    _config.MONGOD_SET_PARAMETERS = config.pop("mongod_set_parameters")
    _config.MONGOS_EXECUTABLE = _expand_user(config.pop("mongos_executable"))

    _config.MONGOS_SET_PARAMETERS = config.pop("mongos_set_parameters")
    _config.NO_JOURNAL = config.pop("no_journal")
    _config.NUM_CLIENTS_PER_FIXTURE = config.pop("num_clients_per_fixture")
    _config.PERF_REPORT_FILE = config.pop("perf_report_file")
    _config.RANDOM_SEED = config.pop("seed")
    _config.REPEAT_SUITES = config.pop("repeat_suites")
    _config.REPEAT_TESTS = config.pop("repeat_tests")
    _config.REPEAT_TESTS_MAX = config.pop("repeat_tests_max")
    _config.REPEAT_TESTS_MIN = config.pop("repeat_tests_min")
    _config.REPEAT_TESTS_SECS = config.pop("repeat_tests_secs")
    _config.REPORT_FAILURE_STATUS = config.pop("report_failure_status")
    _config.REPORT_FILE = config.pop("report_file")
    _config.SERVICE_EXECUTOR = config.pop("service_executor")
    _config.SHELL_READ_MODE = config.pop("shell_read_mode")
    _config.SHELL_WRITE_MODE = config.pop("shell_write_mode")
    _config.SPAWN_USING = config.pop("spawn_using")
    _config.STAGGER_JOBS = config.pop("stagger_jobs") == "on"
    _config.STORAGE_ENGINE = config.pop("storage_engine")
    _config.STORAGE_ENGINE_CACHE_SIZE = config.pop("storage_engine_cache_size_gb")
    _config.SUITE_FILES = config.pop("suite_files")
    if _config.SUITE_FILES is not None:
        _config.SUITE_FILES = _config.SUITE_FILES.split(",")
    _config.TAG_FILE = config.pop("tag_file")
    _config.TEST_FILES = config.pop("test_files")
    _config.TRANSPORT_LAYER = config.pop("transport_layer")

    # Evergreen options.
    _config.EVERGREEN_BUILD_ID = config.pop("build_id")
    _config.EVERGREEN_DISTRO_ID = config.pop("distro_id")
    _config.EVERGREEN_EXECUTION = config.pop("execution_number")
    _config.EVERGREEN_PATCH_BUILD = config.pop("patch_build")
    _config.EVERGREEN_PROJECT_NAME = config.pop("project_name")
    _config.EVERGREEN_REVISION = config.pop("git_revision")
    _config.EVERGREEN_REVISION_ORDER_ID = config.pop("revision_order_id")
    _config.EVERGREEN_TASK_ID = config.pop("task_id")
    _config.EVERGREEN_TASK_NAME = config.pop("task_name")
    _config.EVERGREEN_VARIANT_NAME = config.pop("variant_name")
    _config.EVERGREEN_VERSION_ID = config.pop("version_id")

    # Archival options. Archival is enabled only when running on evergreen.
    if not _config.EVERGREEN_TASK_ID:
        _config.ARCHIVE_FILE = None
    _config.ARCHIVE_LIMIT_MB = config.pop("archive_limit_mb")
    _config.ARCHIVE_LIMIT_TESTS = config.pop("archive_limit_tests")

    # Wiredtiger options.
    _config.WT_COLL_CONFIG = config.pop("wt_coll_config")
    _config.WT_ENGINE_CONFIG = config.pop("wt_engine_config")
    _config.WT_INDEX_CONFIG = config.pop("wt_index_config")

    # Benchmark/Benchrun options.
    _config.BENCHMARK_FILTER = config.pop("benchmark_filter")
    _config.BENCHMARK_LIST_TESTS = config.pop("benchmark_list_tests")
    benchmark_min_time = config.pop("benchmark_min_time_secs")
    if benchmark_min_time is not None:
        _config.BENCHMARK_MIN_TIME = datetime.timedelta(seconds=benchmark_min_time)
    _config.BENCHMARK_REPETITIONS = config.pop("benchmark_repetitions")

    shuffle = config.pop("shuffle")
    if shuffle == "auto":
        # If the user specified a value for --jobs > 1 (or -j > 1), then default to randomize
        # the order in which tests are executed. This is because with multiple threads the tests
        # wouldn't run in a deterministic order anyway.
        _config.SHUFFLE = _config.JOBS > 1
    else:
        _config.SHUFFLE = shuffle == "on"

    conn_string = config.pop("shell_conn_string")
    port = config.pop("shell_port")

    if port is not None:
        conn_string = "mongodb://localhost:" + port

    if conn_string is not None:
        # The --shellConnString command line option must be a MongoDB connection URI, which means it
        # must specify the mongodb:// or mongodb+srv:// URI scheme. pymongo.uri_parser.parse_uri()
        # raises an exception if the connection string specified isn't considered a valid MongoDB
        # connection URI.
        pymongo.uri_parser.parse_uri(conn_string)
        _config.SHELL_CONN_STRING = conn_string

    _config.LOGGER_FILE = config.pop("logger_file")

    if config:
        raise ValueError(f"Unkown option(s): {list(config.keys())}s")


def _set_logging_config():
    """Read YAML configuration from 'pathname' how to log tests and fixtures."""
    pathname = _config.LOGGER_FILE

    # Named loggers are specified as the basename of the file, without the .yml extension.
    if not utils.is_yaml_file(pathname) and not os.path.dirname(pathname):
        if pathname not in resmokeconfig.NAMED_LOGGERS:
            raise argparse.ValueError("Unknown logger '%s'" % pathname)
        pathname = resmokeconfig.NAMED_LOGGERS[pathname]  # Expand 'pathname' to full path.

    if not utils.is_yaml_file(pathname) or not os.path.isfile(pathname):
        raise argparse.ValueError("Expected a logger YAML config, but got '%s'" % pathname)

    _config.LOGGING_CONFIG = utils.load_yaml_file(pathname).pop("logging")


def _expand_user(pathname):
    """Provide wrapper around os.path.expanduser() to do nothing when given None."""
    if pathname is None:
        return None
    return os.path.expanduser(pathname)


def _tags_from_list(tags_list):
    """Return the list of tags from a list of tag parameter values.

    Each parameter value in the list may be a list of comma separated tags, with empty strings
    ignored.
    """
    tags = []
    if tags_list is not None:
        for tag in tags_list:
            tags.extend([t for t in tag.split(",") if t != ""])
        return tags
    return None