#!/usr/bin/env python

from threading import Thread, Lock
import time
from aman.com import Weather

from aman.config.Airport import Airport
from aman.sys.aco.Configuration import Configuration
from aman.sys.WeatherModel import WeatherModel
from aman.sys.RecedingHorizonControl import RecedingHorizonControl
from aman.types.Inbound import Inbound
from aman.types.PerformanceData import PerformanceData

class Worker(Thread):
    def __init__(self):
        Thread.__init__(self)
        self.stopThread = None
        self.icao = None
        self.configuration = None
        self.arrivalRoutes = None
        self.performanceData = None
        self.updateLock = None
        self.reportQueue = {}
        self.weatherModel = None
        self.RecedingHorizonControl = None

    def __del__(self):
        self.release()

    def acquire(self, icao : str, configuration : Airport, weather : Weather, performance : PerformanceData):
        self.stopThread = None
        self.icao = icao
        self.configuration = configuration
        self.sequencingConfiguration = self.configuration.DefaultSequencing
        self.performanceData = performance
        self.arrivalRoutes = configuration.GngData.arrivalRoutes
        self.updateLock = Lock()
        self.reportQueue = {}
        self.weatherModel = WeatherModel(self.configuration.GaforId, weather)
        self.RecedingHorizonControl = RecedingHorizonControl(self.configuration.RecedingHorizonControl)
        self.start()

    def acquireLock(self):
        if None != self.updateLock:
            self.updateLock.acquire()

    def release(self):
        self.stopThread = True
        self.join()

    def releaseLock(self):
        if None != self.updateLock:
            self.updateLock.release()

    def run(self):
        counter = 0

        while None == self.stopThread:
            time.sleep(1)
            counter += 1
            if 0 != (counter % 10):
                continue

            self.acquireLock()

            # perform some book-keeping
            self.RecedingHorizonControl.cleanupWindows()

            # update the aircraft information in RHC
            for callsign in self.reportQueue:
                report = self.reportQueue[callsign]

                if 0 != report.distanceToIAF and '' != report.initialApproachFix:
                    inbound = Inbound(report, self.sequencingConfiguration, self.configuration.GngData, self.performanceData, self.weatherModel)
                    if None != inbound.PlannedRunway and None != inbound.PlannedStar:
                        self.RecedingHorizonControl.update(inbound)
                    else:
                        print('Unable to find all data of ' + report.aircraft.callsign)

            self.reportQueue.clear()

            if 0 != len(self.RecedingHorizonControl.Windows):
                print('FCFS run:')
                for window in self.RecedingHorizonControl.Windows:
                    for inbound in window.Inbounds:
                        print('    ' + inbound.Report.aircraft.callsign + ': ' + str(inbound.EstimatedArrivalTime))

            # get the last landing aircrafts per runway before the RHC stage to check for constraints
            # this is required to handle the overlap between windows
            preceedingInbounds = {}
            for runway in self.sequencingConfiguration.ActiveArrivalRunways:
                inbound = self.RecedingHorizonControl.lastFixedInboundOnRunway(runway.Runway.name)
                if None != inbound:
                    preceedingInbounds[runway.Runway.name] = inbound

            # search the ACO relevant aircrafts
            relevantInbounds = self.RecedingHorizonControl.optimizationRelevantInbounds()
            if None != relevantInbounds:
                print('Relevant inbounds: ' + str(len(relevantInbounds)))

                # configure the ACO run
                acoConfig = Configuration(self.sequencingConfiguration, 5 * len(relevantInbounds), 5 * len(relevantInbounds))
                if 0 != len(preceedingInbounds):
                    acoConfig.PreceedingInbounds = preceedingInbounds
                acoConfig.Inbounds = relevantInbounds
                # TODO perform the ACO run
                # TODO update the RHC stages based on the ACO run result
            else:
                print('No relevant inbounds found for the optimization in ' + self.icao)

            self.releaseLock()