# 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/.
import argparse
import json
import os

DEBUG_CRITICAL = 0
DEBUG_ERROR = 1
DEBUG_WARNING = 2
DEBUG_INFO = 3
DEBUG_VERBOSE = 4


class XTalosError(Exception):
    """error related to xtalos invocation"""


def options_from_config(options, config_file):
    """override options from a json config file; returns the dictionary
    - options: a dictionary with default options
    - config_file: path to a json config file
    """

    with open(config_file, "r") as config:
        conf = json.load(config)
    for optname, value in options.items():
        options[optname] = conf.get(optname, value)
    return options


class XtalosOptions(argparse.ArgumentParser):
    def __init__(self, **kwargs):
        argparse.ArgumentParser.__init__(self, **kwargs)
        defaults = {}

        self.add_argument(
            "--pid", dest="processID", help="process ID of the process we launch"
        )
        defaults["processID"] = None

        self.add_argument(
            "-x",
            "--xperf",
            dest="xperf_path",
            help="location of xperf tool, defaults to" " 'xperf.exe'",
        )
        defaults["xperf_path"] = "xperf.exe"

        self.add_argument(
            "-e",
            "--etl_filename",
            dest="etl_filename",
            help="Name of the .etl file to work with." " Defaults to 'output.etl'",
        )
        defaults["etl_filename"] = "test.etl"

        self.add_argument(
            "-d",
            "--debug",
            type=int,
            dest="debug_level",
            help="debug level for output from tool (0-5, 5"
            " being everything), defaults to 1",
        )
        defaults["debug_level"] = 1

        self.add_argument(
            "-o",
            "--output-file",
            dest="outputFile",
            help="Filename to write all output to, default" " is stdout",
        )
        defaults["outputFile"] = "etl_output.csv"

        self.add_argument(
            "-r",
            "--providers",
            dest="xperf_providers",
            action="append",
            help="xperf providers to collect data from",
        )
        defaults["xperf_providers"] = []

        self.add_argument(
            "--user-providers",
            dest="xperf_user_providers",
            action="append",
            help="user mode xperf providers to collect data" " from",
        )
        defaults["xperf_user_providers"] = []

        self.add_argument(
            "-s",
            "--stackwalk",
            dest="xperf_stackwalk",
            action="append",
            help="xperf stackwalk arguments to collect",
        )
        defaults["xperf_stackwalk"] = []

        self.add_argument(
            "-c",
            "--config-file",
            dest="configFile",
            help="Name of the json config file with test run"
            " and browser information",
        )
        defaults["configFile"] = None

        self.add_argument(
            "-w",
            "--allowlist-file",
            dest="allowlist_file",
            help="Name of allowlist file",
        )
        defaults["allowlist_file"] = None

        self.add_argument(
            "-i",
            "--all-stages",
            dest="all_stages",
            action="store_true",
            help="Include all stages in file I/O output," "not just startup",
        )
        defaults["all_stages"] = False

        self.add_argument(
            "-t",
            "--all-threads",
            dest="all_threads",
            action="store_true",
            help="Include all threads in file I/O output," " not just main",
        )
        defaults["all_threads"] = False

        self.add_argument(
            "-a",
            "--approot",
            dest="approot",
            help="Provide the root directory of the application"
            " we are testing to find related files (i.e."
            " dependentlibs.list)",
        )
        defaults["approot"] = None

        self.add_argument(
            "--error-filename",
            dest="error_filename",
            help="Filename to store the failures detected" " while runnning the test",
        )
        defaults["error_filename"] = None

        self.set_defaults(**defaults)

    def verifyOptions(self, options):

        # override options from config file
        if options.configFile:
            options_from_config(options.__dict__, options.configFile)

        # ensure xperf path exists
        options.xperf_path = os.path.abspath(options.xperf_path)
        if not os.path.exists(options.xperf_path):
            print("ERROR: xperf_path '%s' does not exist" % options.xperf_path)
            return None

        return options
