#!/usr/bin/env python
# Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.org/sumo
# Copyright (C) 2012-2019 German Aerospace Center (DLR) and others.
# This program and the accompanying materials
# are made available under the terms of the Eclipse Public License v2.0
# which accompanies this distribution, and is available at
# http://www.eclipse.org/legal/epl-v20.html
# SPDX-License-Identifier: EPL-2.0

# @file    generateStationEdges.py
# @author  Jakob Erdmann
# @date    2018-08-07
# @version $Id$

"""
Generate pedestrian edges for every public transport stop to serve as access
edge in otherwise pure railway networks
"""
from __future__ import absolute_import
import sys
from optparse import OptionParser

import sumolib  # noqa


def parse_args():
    USAGE = "Usage: " + sys.argv[0] + " <netfile> <stopfile> [options]"
    optParser = OptionParser()
    optParser.add_option("-o", "--outfile", help="prefix of output file")
    optParser.add_option("-l", "--length", type=float, default=10., help="length of generated solitary edges")
    optParser.add_option("-w", "--width", type=float, default=8., help="width of generated solitary edges")
    # optParser.add_option("-d", "--cluster-dist", type=float, default=500., help="length of generated edges")
    options, args = optParser.parse_args()
    try:
        options.netfile, options.stopfile = args
    except Exception:
        sys.exit(USAGE)
    if options.outfile is None:
        options.outfile = options.stopfile[:-4] + ".access"
    return options


def main(options):
    net = sumolib.net.readNet(options.netfile, withConnections=False, withFoes=False)
    l2 = options.length / 2
    with open(options.outfile + ".edg.xml", 'w') as out_e:
        with open(options.outfile + ".nod.xml", 'w') as out_n:
            sumolib.writeXMLHeader(out_e, "$Id$")  # noqa
            sumolib.writeXMLHeader(out_n, "$Id$")  # noqa
            out_e.write('<edges>\n')
            out_n.write('<nodes>\n')
            for stop in sumolib.xml.parse(options.stopfile, 'busStop', heterogeneous=True):
                edge_id = stop.id + "_access"
                x, y = sumolib.geomhelper.positionAtShapeOffset(
                    net.getLane(stop.lane).getShape(),
                    (float(stop.startPos) + float(stop.endPos)) / 2)
                from_id = edge_id + '_from'
                to_id = edge_id + '_to'
                out_n.write('    <node id="%s" x="%s" y="%s"/>\n' % (from_id, x - l2, y))
                out_n.write('    <node id="%s" x="%s" y="%s"/>\n' % (to_id, x + l2, y))
                out_e.write('    <edge id="%s" from="%s" to="%s" allow="pedestrian" width="%s"/>\n' % (
                    edge_id, from_id, to_id, options.width))
            out_e.write('</edges>\n')
            out_n.write('</nodes>\n')


if __name__ == "__main__":
    options = parse_args()
    main(options)
