# -*- coding: utf-8 -*-
"""
Script to run different scenarios.
"""

# Author: Runsheng Xu <rxx3386@ucla.edu>
# License: TDG-Attribution-NonCommercial-NoDistrib

import argparse
import importlib
import os
import sys

from opencda.version import __version__


def arg_parse():
    parser = argparse.ArgumentParser(description="OpenCDA scenario runner.")
    parser.add_argument('-t', "--test_scenario", required=True, type=str,
                        help='Define the name of the scenario you want to test. The given name must'
                             'match one of the testing scripts(e.g. single_2lanefree_carla) in '
                             'opencda/scenario_testing/ folder'
                             ' as well as the corresponding yaml file in opencda/scenario_testing/config_yaml.')
    parser.add_argument("--record", action='store_true', help='whether to record and save the simulation process to'
                                                              '.log file')
    parser.add_argument("--apply_ml",
                        action='store_true',
                        help='whether ml/dl framework such as sklearn/pytorch is needed in the testing. '
                             'Set it to true only when you have installed the pytorch/sklearn package.')
    parser.add_argument('-v', "--version", type=str, default='0.9.11',
                        help='Specify the CARLA simulator version, default'
                             'is 0.9.11, 0.9.12 is also supported.')

    opt = parser.parse_args()
    return opt


def main():
    opt = arg_parse()
    print("OpenCDA Version: %s" % __version__)

    try:
        testing_scenario = importlib.import_module("opencda.scenario_testing.%s" % opt.test_scenario)
    except ModuleNotFoundError:
        sys.exit("ERROR: %s.py not found under opencda/scenario_testing" % opt.test_scenario)

    config_yaml = os.path.join(os.path.dirname(os.path.realpath(__file__)),
                               'opencda/scenario_testing/config_yaml/%s.yaml' % opt.test_scenario)
    if not os.path.isfile(config_yaml):
        sys.exit("opencda/scenario_testing/config_yaml/%s.yaml not found!" % opt.test_cenario)

    scenario_runner = getattr(testing_scenario, 'run_scenario')
    # run scenario testing
    scenario_runner(opt, config_yaml)


if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        print(' - Exited by user.')