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"""A utility module for making standalone scripts to start servers.

Scripts in Tools/Scripts can use this module to start servers that
are normally used for layout tests, outside of the layout test runner.
"""

import argparse
import logging

from webkitpy.common.host import Host


def main(server_constructor, input_fn=None, argv=None, description=None, **kwargs):
    input_fn = input_fn or raw_input

    parser = argparse.ArgumentParser(description=description, formatter_class=argparse.RawTextHelpFormatter)
    parser.add_argument('--output-dir', type=str, default=None,
                        help='output directory, for log files etc.')
    parser.add_argument('-v', '--verbose', action='store_true',
                        help='print more information, including port numbers')
    args = parser.parse_args(argv)

    logging.basicConfig()
    logger = logging.getLogger()
    logger.setLevel(logging.DEBUG if args.verbose else logging.INFO)

    host = Host()
    port_obj = host.port_factory.get()
    if not args.output_dir:
        args.output_dir = port_obj.default_results_directory()

    # Create the output directory if it doesn't already exist.
    port_obj.host.filesystem.maybe_make_directory(args.output_dir)

    server = server_constructor(port_obj, args.output_dir, **kwargs)
    server.start()
    try:
        _ = input_fn('Hit any key to stop the server and exit.')
    except (KeyboardInterrupt, EOFError):
        pass

    server.stop()