# Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.org/sumo
# Copyright (C) 2013-2019 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    phem.py
# @author  Daniel Krajzewicz
# @author  Jakob Erdmann
# @author  Michael Behrisch
# @date    2013-01-15
# @version $Id$

"""
This module includes functions for converting SUMO's fcd-output into
data files read by PHEM.
"""
from __future__ import print_function
from __future__ import absolute_import
import math
import sumolib


def _convType(tID):
    if tID:
        if tID.lower().startswith("passenger") or tID.lower().startswith("pkw"):
            # needed for V2X applications only
            if tID.lower().startswith("passenger_equipped") or tID.lower().startswith("pkw_equipped"):
                return "PKW_equipped"
            return "PKW"
        if tID.lower().startswith("bus"):
            return "BUS"
        if tID.lower().startswith("heavy") or tID.lower().startswith("lkw"):
            return "LKW"
        print("Could not convert the vehicle type properly")
    return "unknown"


def fcd2dri(inpFCD, outSTRM, ignored):
    """
    Reformats the contents of the given fcd-output file into a .dri file, readable
    by PHEM. The fcd-output "fcd" must be a valid file name of an fcd-output.

    The following may be a matter of changes:
    - the engine torque is not given
    """
    # print >> outSTRM, "v1\n<t>,<v>,<grad>,<n>\n[s],[km/h],[%],[1/min]\n"
    print("v1\n<t>,<v>,<grad>\n[s],[km/h],[%]", file=outSTRM)
    for q in inpFCD:
        if q.vehicle:
            for v in q.vehicle:
                percSlope = math.sin(float(v.slope)) * 100.
                print("%s,%.3f,%s" % (
                    sumolib._intTime(q.time), float(v.speed) * 3.6, percSlope), file=outSTRM)


def net2str(net, outSTRM):
    """
    Writes the network object given as "inpNET" as a .str file readable by PHEM.
    Returns a map from the SUMO-road id to the generated numerical id used by PHEM.

    The following may be a matter of changes:
    - currently, only the positions of the start and the end nodes are written,
      the geometry of the edge as defined in the SUMO-network is not exported.
      A map between the edge id and a segment to a numerical id would be necessary
    """
    if outSTRM is not None:
        print("Str-Id,Sp,SegAnX,SegEnX,SegAnY,SegEnY", file=outSTRM)
    sIDm = sumolib._Running()
    for e in net._edges:
        eid = sIDm.g(e._id)
        if outSTRM is not None:
            c1 = e._from._coord
            c2 = e._to._coord
            print("%s,%s,%s,%s,%s,%s" %
                  (eid, len(e._lanes), c1[0], c2[0], c1[1], c2[1]), file=outSTRM)
    return sIDm


def fcd2fzp(inpFCD, outSTRM, further):
    """
    Reformats the contents of the given fcd-output file into a .fzp file, readable
    by PHEM. The fcd-output "fcd" must be a valid file name of an fcd-output.

    The "sIDm" parameter must be a map from SUMO-edge ids to their numerical
    representation as generated by toSTR(inpNET, outSTRM).
    Returns two maps, the first from vehicle ids to a numerical representation,
    the second from vehicle type ids to a numerical representation.
    """
    sIDm = further["phemStreetMap"]
    if outSTRM is not None:
        print(
            "t,WeltX,WeltY,Veh. No,v,Gradient,veh.Typ-Id,Str-Id", file=outSTRM)
    vIDm = sumolib._Running(further["orig-ids"], True)
    vtIDm = sumolib._Running()
    vtIDm.g("PKW")
    vtIDm.g("PKW_equipped")
    vtIDm.g("LKW")
    vtIDm.g("BUS")
    for q in inpFCD:
        if q.vehicle:
            for v in q.vehicle:
                vid = vIDm.g(v.id)
                aType = _convType(v.type)
                vtid = vtIDm.g(aType)
                sid = sIDm.g(v.edge)
                percSlope = math.sin(float(v.slope)) * 100.
                if outSTRM is not None:
                    print("%s,%s,%s,%s,%.3f,%s,%s,%s" % (
                        sumolib._intTime(q.time), float(v.x), float(v.y),
                        vid, float(v.speed) * 3.6, percSlope, vtid, sid), file=outSTRM)
    return vIDm, vtIDm


def vehicleTypes2flt(outSTRM, vtIDm):
    """
    Currently, rather a stub than an implementation. Writes the vehicle ids stored
    in the given "vtIDm" map formatted as a .flt file readable by PHEM.

    The following may be a matter of changes:
    - A default map is assigned to all vehicle types with the same probability
    """
    for q in sorted(vtIDm._m):
        print("%s,%s,%s" %
              (vtIDm.g(q), "<VEHDIR>\PC\PC_%s.GEN" % q, 1.), file=outSTRM)
