#!/usr/bin/env python
"""
@file    Assignment.py
@author  Yun-Pang Wang
@author  Michael Behrisch
@date    2008-03-28
@version $Id: Assignment.py 12248 2012-04-24 07:31:16Z namdre $

This script is for executing the traffic assignment.
Three assignment models are available:
- incremental
- c-logit
- lohse

The c-logit model are set as default.

SUMO, Simulation of Urban MObility; see http://sumo.sourceforge.net/
Copyright (C) 2008-2012 DLR (http://www.dlr.de/) and contributors
All rights reserved
"""

import os, random, string, sys, datetime, math, operator
from xml.sax import saxutils, make_parser, handler
from optparse import OptionParser
from elements import Predecessor, Vertex, Edge, Path, Vehicle
from network import Net, DistrictsReader, ExtraSignalInformationReader
from dijkstra import dijkstraBoost, dijkstraPlain, dijkstra
from inputs import getMatrix, getConnectionTravelTime
from outputs import timeForInput, outputODZone, outputNetwork, outputStatistics, sortedVehOutput, linkChoicesOutput
from assign import doSUEAssign, doLohseStopCheck, doSUEVehAssign, doIncAssign
from tables import updateCurveTable
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import sumolib.net


def initLinkChoiceMap(net, startVertices, endVertices, matrixPshort, linkChoiceMap, odPairsMap):
    odpairCounts = 0
    for start, startVertex in enumerate(startVertices):
        odPairsMap[startVertex.label]= {}
        for end, endVertex in enumerate(endVertices):
            if startVertex.label != endVertex.label and matrixPshort[start][end] > 0.:
                odpairCounts += 1
                odPairsMap[startVertex.label][endVertex.label] = odpairCounts

                for e in net._detectedEdges:
                    if e.detected not in linkChoiceMap:
                        linkChoiceMap[e.detected] = {}
                    linkChoiceMap[e.detected][odpairCounts] = 0.

    return linkChoiceMap

def main():
    # for measuring the required time for reading input files
    inputreaderstart = datetime.datetime.now()
    foutlog = file('%s_log.txt' % options.type, 'w')
    foutlog.write('The stochastic user equilibrium traffic assignment will be executed with the %s model.\n' % options.type)
    foutlog.write('All vehicular releasing times are determined randomly(uniform).\n')
  
    matrices = options.mtxpsfile.split(",")
    parser = make_parser()
    
    if options.verbose:
        print "Reading net"
    print 'net file:', options.netfile
    net = Net()
    sumolib.net.readNet(options.netfile, net=net)
    parser.setContentHandler(DistrictsReader(net))
    parser.parse(options.confile)
    if options.sigfile:
        parser.setContentHandler(ExtraSignalInformationReader(net))
        parser.parse(options.sigfile)
    foutlog.write('- Reading network: done.\n')
    foutlog.write('number of total startVertices:%s\n' % net.getstartCounts())
    foutlog.write('number of total endVertices:%s\n' % net.getendCounts())
    if options.verbose:
        print net.getfullEdgeCounts(), "edges read (internal edges included)"

    if options.curvefile:
        updateCurveTable(options.curvefile)
        
    if options.hours == 24.:
        assignHours = 16.
    else:
        assignHours = options.hours 

    for edge in net.getEdges():
        if edge._lanes:
            edge.getCapacity()
            edge.getAdjustedCapacity(net)
            edge.estcapacity *= assignHours
            edge.getConflictLink()

    if options.dijkstra == 'boost':
        net.createBoostGraph()
    if options.verbose:
        print "after link reduction:", net.getfullEdgeCounts(), "edges read"

    # calculate link travel time for all district connectors 
    getConnectionTravelTime(net._startVertices, net._endVertices)
            
    foutlog.write('- Initial calculation of link parameters : done.\n')
    # the required time for reading the network     
    timeForInput(inputreaderstart)
    
    if options.debug:
        outputNetwork(net)
        
    # initialize the map for recording the number of the assigned vehicles
    AssignedVeh = {}
    # initialize the map for recording the number of the assigned trips
    AssignedTrip = {}
    smallDemand = []
    linkChoiceMap = {}
    odPairsMap = {}
    for start, startVertex in enumerate(net._startVertices):
        AssignedVeh[startVertex]={}
        AssignedTrip[startVertex]={}
        smallDemand.append([])
        for end, endVertex in enumerate(net._endVertices):
            AssignedVeh[startVertex][endVertex] = 0
            AssignedTrip[startVertex][endVertex] = 0.
            smallDemand[-1].append(0.)
            
    # initialization
    vehID = 0
    matrixSum = 0.0
    lohse = (options.type == "lohse")
    incremental = (options.type == "incremental")
    checkKPaths = False
    
    if not incremental and options.kPaths > 1:
        checkKPaths = True
    if not incremental:
        net.initialPathSet()
 
    starttime = datetime.datetime.now()
    # initialize the file for recording the routes
    if options.odestimation:
        net.getDetectedEdges(options.outputdir)
    else:
        foutroute = open('routes.rou.xml', 'w')
        print >> foutroute, """<?xml version="1.0"?>
<!-- generated on %s by $Id: Assignment.py 12248 2012-04-24 07:31:16Z namdre $ -->
<routes>""" % starttime
    
    for counter, matrix in enumerate(matrices):  #for counter in range (0, len(matrices)):
        # delete all vehicle information related to the last matrix for saving the disk space
        vehicles = []
        iterInterval = 0
        matrixPshort, startVertices, endVertices, CurrentMatrixSum, begintime, assignPeriod, Pshort_EffCells, matrixSum, smallDemandRatio = getMatrix(net, options.verbose, matrix, matrixSum, options.demandscale)
        options.hours = float(assignPeriod)
        smallDemandPortion = math.ceil(float(options.maxiteration)/2. * smallDemandRatio)
        if float(smallDemandPortion) != 0.:
            iterInterval = math.ceil(float(options.maxiteration) / float(smallDemandPortion))
        
        departtime = begintime * 3600
        
        if options.verbose:
            print 'the analyzed matrices:', counter
            print 'Begintime:', begintime, "O'Clock"
            print 'departtime', departtime
            print 'Matrix und OD Zone already read for Interval', counter
            print 'CurrentMatrixSum:', CurrentMatrixSum
        
        foutlog.write('Reading matrix and O-D zones: done.\n')
        foutlog.write('Matrix und OD Zone already read for Interval:%s\n' %counter)
        foutlog.write('CurrentMatrixSum:%s\n' %CurrentMatrixSum)
        foutlog.write('number of current startVertices:%s\n' %len(startVertices))
        foutlog.write('number of current endVertices:%s\n' %len(endVertices))
               
        if options.odestimation:
            linkChoiceMap.clear()
            odPairsMap.clear()
            linkChoiceMap = initLinkChoiceMap(net, startVertices, endVertices, matrixPshort, linkChoiceMap, odPairsMap)

        for edge in net.getEdges():
            edge.flow = 0.
            edge.helpflow = 0.
            edge.actualtime = edge.freeflowtime
            edge.helpacttime = edge.freeflowtime
            edge.fTT = 0.
            edge.TT = 0.
            edge.delta = 0.
            edge.helpacttimeEx = 0.
                
        # the number of origins, the umber of destinations and the number of the OD pairs
        origins = len(startVertices)
        dests = len(endVertices)
        ODpairs = origins * dests
        
        # output the origin and destination zones and the number of effective OD pairs
        if options.debug:
            outputODZone(startVertices, endVertices, Pshort_EffCells, counter) # matrixCounter)  
        
        if incremental:
            print 'begin the incremental assignment!'
            iter = 0
            options.lamda = 0.
            while iter < options.maxiteration:
                foutlog.write('- Current iteration(not executed yet):%s\n' %iter)
                iter += 1
                if iterInterval != 0 and operator.mod(iter,iterInterval) == 0:
                    assignSmallDemand = True
                else:
                    assignSmallDemand = False
                for start, startVertex in enumerate(startVertices):
                    targets = set()
                    for end, endVertex in enumerate(endVertices):
                        if assignSmallDemand and matrixPshort[start][end] > 0. and matrixPshort[start][end] < 1.:
                            smallDemand[start][end] = matrixPshort[start][end]/float(smallDemandPortion)
                            
                        if matrixPshort[start][end] > 1. or (assignSmallDemand and smallDemand[start][end] > 0.):
                            targets.add(endVertex)

                    if len(targets) > 0:
                        if options.dijkstra == 'boost':
                            D,P = dijkstraBoost(net._boostGraph, startVertex.boost)
                        elif options.dijkstra == 'plain':
                            D,P = dijkstraPlain(startVertex, targets)
                        elif options.dijkstra == 'extend':
                            D,P = dijkstra(startVertex, targets)
                        vehID, smallDemand, linkChoiceMap = doIncAssign(
                                net, vehicles, options.verbose, options.maxiteration, options.odestimation,
                                endVertices, start, startVertex, matrixPshort, smallDemand,
                                D, P, AssignedVeh, AssignedTrip, vehID, assignSmallDemand, linkChoiceMap, odPairsMap)

                if options.dijkstra != 'extend':
                    linkMap = net._fullEdges
                else:
                    linkMap = net._edges
                for edge in linkMap.itervalues():
                    edge.getActualTravelTime(options, False)
                    if options.dijkstra == 'boost':
                        edge.boost.weight = edge.helpacttime
        else:
            print 'begin the', options.type, " assignment!"
            # initialization for the clogit and the lohse assignment model
            iter_outside = 1
            newRoutes = 1
            stable = False
            first = True
            # begin the traffic Assignment
            while newRoutes > 0:
                foutlog.write('- SUE iteration:%s\n' %iter_outside)
                # Generate the effective routes als intital path solutions, when considering k shortest paths (k is defined by the user.)
                if checkKPaths:
                    checkPathStart = datetime.datetime.now() 
                    newRoutes = net.calcKPaths(options.verbose, options.kPaths, newRoutes, startVertices, endVertices, matrixPshort, options.gamma)
                    checkPathEnd = datetime.datetime.now() - checkPathStart
                    foutlog.write('- Time for finding the k-shortest paths: %s\n' %checkPathEnd)
                    foutlog.write('- Finding the k-shortest paths for each OD pair: done.\n')
                    if options.verbose:
                        print 'iter_outside:', iter_outside
                        print 'number of k shortest paths:', options.kPaths 
                        print 'number of new routes:', newRoutes
                
                elif not checkKPaths and iter_outside == 1 and counter == 0:
                    print 'search for the new path'
                    newRoutes = net.findNewPath(startVertices, endVertices, newRoutes, matrixPshort, options.gamma, lohse, options.dijkstra)
                
                checkKPaths = False
                
                if options.verbose:
                    print 'iter_outside:', iter_outside
                    print 'number of new routes:', newRoutes
                
                stable = False
                iter_inside = 1
                while not stable:
                    if options.verbose:
                        print 'iter_inside:', iter_inside
                    stable = doSUEAssign(net, options, startVertices, endVertices, matrixPshort, iter_inside, lohse, first)
                    # The matrixPlong and the matrixTruck should be added when considering the long-distance trips and the truck trips.
                    if lohse:
                        stable = doLohseStopCheck(net, options, stable, iter_inside, options.maxiteration, foutlog)

                    iter_inside += 1
    
                    if options.verbose:
                        print 'stable:', stable
                    
                newRoutes = net.findNewPath(startVertices, endVertices, newRoutes, matrixPshort, options.gamma, lohse, options.dijkstra)

                first = False    
                iter_outside += 1
    
                if newRoutes < 3 and iter_outside > int((options.maxiteration)/2):
                    newRoutes = 0
                    
                if iter_outside > options.maxiteration:
                    print 'The max. number of iterations is reached!'
                    foutlog.write('The max. number of iterations is reached!\n')
                    foutlog.write('The number of new routes and the parameter stable will be set to zero and True respectively.\n')
                    print 'newRoutes:', newRoutes 
                    stable = True
                    newRoutes = 0
    
            # update the path choice probability and the path flows as well as generate vehicle data 	
            vehID = doSUEVehAssign(net, vehicles, options, counter, matrixPshort, startVertices, endVertices, AssignedVeh, AssignedTrip, vehID, lohse)

       # output the generated vehicular releasing times and routes, based on the current matrix
        print 'done with the assignment' # debug
        if options.odestimation:
            linkChoicesOutput(net, startVertices, endVertices, matrixPshort, linkChoiceMap, odPairsMap, options.outputdir, starttime)
        else:
            sortedVehOutput(vehicles, departtime, options, foutroute)

    if not options.odestimation:
        foutroute.write('</routes>\n')
        foutroute.close()

    # output the global performance indices
    assigntime = outputStatistics(net, starttime, len(matrices))
    
    foutlog.write('- Assignment is completed and all required information is generated. ')
    foutlog.close()

    if options.verbose:
        print 'Duration for traffic assignment:', assigntime
        print 'Total assigned vehicles:', vehID
    print 'Total number of the assigned trips:', matrixSum

optParser = OptionParser()
optParser.add_option("-m", "--matrix-file", dest="mtxpsfile", 
                     help="read OD matrix for passenger vehicles from FILE (mandatory)", metavar="FILE")
optParser.add_option("-G", "--globalmatrix-file", dest="glbmtxfile", 
                     help="read daily OD matrix for passenger vehicles from FILE (mandatory)", metavar="FILE")
optParser.add_option("-n", "--net-file", dest="netfile",                          
                     help="read SUMO network from FILE (mandatory)", metavar="FILE")
optParser.add_option("-d", "--district-file", dest="confile",
                     help="read OD Zones from FILE (mandatory)", metavar="FILE")  
optParser.add_option("-s", "--extrasignal-file", dest="sigfile",
                     help="read extra/updated signal timing plans from FILE", metavar="FILE")
optParser.add_option("-u", "--crCurve-file", dest="curvefile",
                     help="read parameters used in cost functions from FILE", metavar="FILE")  
optParser.add_option("-k", "--k-shortest-paths", dest="kPaths", type="int",
                     default=8, help="number of the paths should be found at the first iteration")
optParser.add_option("-i", "--max-sue-iteration", dest="maxiteration", type="int",
                     default=20, help="maximum number of the assignment iterations")
optParser.add_option("-t", "--sue-tolerance", dest="sueTolerance", type="float",
                     default=0.001, help="difference tolerance for the convergence in the c-logit model")
optParser.add_option("-a", "--alpha", dest="alpha", type="float",
                     default=0.15, help="alpha value to determine the commonality factor")
optParser.add_option("-g", "--gamma", dest="gamma", type="float",
                     default=1., help="gamma value to determine the commonality factor")
optParser.add_option("-l", "--lambda", dest="lamda", type="float",
                     default=0.3, help="lambda value to determine the penalty time due to queue")
optParser.add_option("-U", "--under-value", dest="under", type="float",
                     default=0.15, help="parameter 'under' to determine auxiliary link cost")
optParser.add_option("-p", "--upper-value", dest="upper", type="float",
                     default=0.5, help="parameter 'upper' to determine auxiliary link cost")
optParser.add_option("-X", "--parameter-1", dest="v1", type="float",
                     default=2.5, help="parameter 'v1' to determine auxiliary link cost in the lohse model")
optParser.add_option("-y", "--parameter-2", dest="v2", type="float",
                     default=4., help="parameter 'v2' to determine auxiliary link cost in the lohse model")
optParser.add_option("-z", "--parameter-3", dest="v3", type="float",
                     default=0.002, help="parameter 'v3' to determine auxiliary link cost in the lohse model")
optParser.add_option("-c", "--convergence-parameter-1", dest="cvg1", type="float",
                     default=1., help="parameter 'cvg1' to calculate the convergence value in the lohse model")
optParser.add_option("-o", "--convergence-parameter-2", dest="cvg2", type="float",
                     default=1., help="parameter 'cvg2' to calculate the convergence value in the lohse model")
optParser.add_option("-q", "--convergence-parameter-3", dest="cvg3", type="float",
                     default=10., help="parameter 'cvg3' to calculate the convergence value in the lohse model")
optParser.add_option("-v", "--verbose", action="store_true", dest="verbose",
                     default=False, help="tell me what you are doing")
optParser.add_option("-b", "--debug", action="store_true", dest="debug",
                     default=False, help="debug the program")
optParser.add_option("-e", "--type", dest="type", type="choice",
                     choices=('clogit', 'lohse', 'incremental'),
                     default="clogit", help="type of assignment [default: %default]")
optParser.add_option("-H", "--hours", dest="hours", type="float",
                     default=1., help="the analysing period(hours)")
optParser.add_option("-r", "--profile", action="store_true", dest="profile",   
                     default=False, help="writing profiling info")
optParser.add_option("-+", "--dijkstra", dest="dijkstra", type="choice",
                     choices=('extend', 'plain', 'boost'),
                     default="plain", help="use penalty, plain(original) or boost in dijkstra implementation [default: %default]")
optParser.add_option("-x", "--odestimation", action="store_true", dest="odestimation",
                     default=False, help="generate trips for OD estimation")
optParser.add_option("-f", "--scale-factor", dest="demandscale", type="float", default=1., help="scale demand by ")
optParser.add_option("-O", "--output-dir", dest="outputdir",
                     default=os.getcwd(), help="define the output directory name and path")
(options, args) = optParser.parse_args()

if not options.netfile or not options.confile or not options.mtxpsfile:
    optParser.print_help()
    sys.exit()

if options.profile:
    import hotshot, hotshot.stats
    hotshotFile = "hotshot_%s_stats" % options.type
    prof = hotshot.Profile(hotshotFile)
    prof.runcall(main)
    prof.close()
    s = hotshot.stats.load(hotshotFile)
    s.strip_dirs().sort_stats("time").print_stats(20)
else:
    main()
