#!/usr/bin/env python
# Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.org/sumo
# Copyright (C) 2008-2020 German Aerospace Center (DLR) and others.
# This program and the accompanying materials are made available under the
# terms of the Eclipse Public License 2.0 which is available at
# https://www.eclipse.org/legal/epl-2.0/
# This Source Code may also be made available under the following Secondary
# Licenses when the conditions for such availability set forth in the Eclipse
# Public License 2.0 are satisfied: GNU General Public License, version 2
# or later which is available at
# https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later

# @file    plot_net_trafficLights.py
# @author  Daniel Krajzewicz
# @author  Michael Behrisch
# @date    2013-10-28

from __future__ import absolute_import
from __future__ import print_function

import os
import sys

if 'SUMO_HOME' in os.environ:
    tools = os.path.join(os.environ['SUMO_HOME'], 'tools')
    sys.path.append(tools)
else:
    sys.exit("Please declare the environment variable 'SUMO_HOME'")

import sumolib  # noqa
from sumolib.visualization import helpers  # noqa
import matplotlib.pyplot as plt  # noqa


def main(args=None):
    """The main function; parses options and plots"""
    # ---------- build and read options ----------
    from optparse import OptionParser
    optParser = OptionParser()
    optParser.add_option("-n", "--net", dest="net", metavar="FILE",
                         help="Defines the network to read")
    optParser.add_option("-v", "--verbose", dest="verbose", action="store_true",
                         default=False, help="If set, the script says what it's doing")
    optParser.add_option("-w", "--width", dest="width",
                         type="float", default=20, help="Defines the width of the dots")
    optParser.add_option("-c", "--color", dest="color",
                         default='r', help="Defines the dot color")
    optParser.add_option("--edge-width", dest="defaultWidth",
                         type="float", default=1, help="Defines the edge width")
    optParser.add_option("--edge-color", dest="defaultColor",
                         default='k', help="Defines the edge color")

    # standard plot options
    helpers.addInteractionOptions(optParser)
    helpers.addPlotOptions(optParser)
    # parse
    options, remaining_args = optParser.parse_args(args=args)

    if options.net is None:
        print("Error: a network to load must be given.")
        return 1
    if options.verbose:
        print("Reading network from '%s'" % options.net)
    net = sumolib.net.readNet(options.net)

    tlsn = {}
    for tid in net._id2tls:
        t = net._id2tls[tid]
        tlsn[tid] = set()
        for c in t._connections:
            n = c[0].getEdge().getToNode()
            tlsn[tid].add(n)

    tlspX = []
    tlspY = []
    for tid in tlsn:
        x = 0
        y = 0
        n = 0
        for node in tlsn[tid]:
            x += node._coord[0]
            y += node._coord[1]
            n = n + 1
        x = x / n
        y = y / n
        tlspX.append(x)
        tlspY.append(y)

    fig, ax = helpers.openFigure(options)
    ax.set_aspect("equal", None, 'C')
    helpers.plotNet(net, {}, {}, options)
    plt.plot(tlspX, tlspY, options.color, linestyle='None',
             marker='o', markersize=options.width, label='Traffic light')
    options.nolegend = False
    helpers.closeFigure(fig, ax, options)


if __name__ == "__main__":
    sys.exit(main(sys.argv))
