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#  Created by Scott Russell
#  Copyright (c) 2006,2007 Marcil Tech Group. All rights reserved.

class SimModel

  include Math

        WORLD_VERSION=3
        DEFAULT_TIME = Time.gm(2007,"jan",1,0,0,0)
        #DEFAULT_TIME = DateTime.parse("2007-01-01T00:00:00")
        attr_accessor :running
        attr_accessor :runOnce
        attr_accessor :airports
        attr_accessor :planes
        attr_accessor :time
        attr_accessor :ageBias
        attr_accessor :day
        attr_accessor :month
        attr_accessor :people
        attr_accessor :something_happened
        attr_accessor :distances
        attr_accessor :bearings
        attr_accessor :world
        attr_accessor :allowed_trips

        def initialize(world)
                @allowed_trips = 4
                @world = world
                @version = 2.0
                @planes=[]
                @airports=[]
                @people=[]
                @distances = {}
                @bearings = {}
                @ageBias = 0.05
                @day = 0
                reset
        end

        def reset(time=DEFAULT_TIME)
                @time = time
                @run_start_time = time
                @planes.each {|p| p.reset }
                @airports.each {|a| a.reset }
                @people.each {|p| p.reset }
                @day = 0
                clearLog
                addLog("RESET")
        end
        
        def clearPopulation
                for a in @airports
                        a.clear
                end
                for p in @planes
                        p.clear
                end
                @people = []
        end

        def buildPopulation
                while @people.length < MAXIMUM_POPULATION 
                        for a in @airports
                                a.think_populate(1)
                        end
                end
        end

  def wind(position)
    angle = 90
    speed = 15
                cosA = Math.cos(angle)
                sinA = Math.sin(angle)
                x -= (cosA * speed.to_f)
                y -= (sinA * speed.to_f)
                [x,y]
  end
  
        def logText
                ret = ""
                @logLines.last(300).reverse.each do |line|
                        puts line
                        ret += line[0].strftime("%m/%d - %H:%M")
                        ret += " "
                        ret += line[1].to_s
                        ret += "\n"
                end
                ret
        end
        
        def addLog(message)
                @logLines << [@time, message]
        end

        def clearLog
                @logLines = []
        end        

        def cost_cities(plane)
                routes = []
                if plane.landed_airport
                        costs = {}
                        for a in @airports
                                plane.landed_airport.routes(a, plane.range).each {|r| routes << Route.new(r)}
                        end
                        for r in routes
                                if r.airports.length > 2
                                        last = r.airports.first
                                        for a in r.airports[1..-1]
                                                r.distance += distance_to(last, a)
                                                d_affect = plane.range / r.distance
                                                last = a
                                                
                                                 #if plane has capacity, then consider ground waiting
                                                if plane.room_left
                                                        r.weight += a.waiting.length * d_affect
                                                end

                                                #if plane has passengers, then consider pax destination
                                                if plane.passengers.length > 0 
                                                        pax = plane.passengers.select{|p| p.target == a}
                                                        pax.each {|p| r.weight += (ageBias * p.age) * d_affect}                                                        
                                                end
                                        end
                                end
                        end
                end
                routes.sort { |one, other| other.weight <=> one.weight }
        end
        
        def dispatch(plane)
                #puts "#{plane.tail} speed:#{plane.speed} landed:#{plane.landed} landed:#{plane.landed_airport} target:#{plane.target_airport} pax:#{plane.passengers.length} waiting:#{total_waiting}" 

                if plane.speed > 0
                        if (plane.landed or plane.target_airport.nil?) and (plane.passengers.length > 0 or total_waiting > 0) 
                                if plane.landed_airport == plane.home
                                        if plane.destination.waiting.length > 0 or plane.passengers.length > 0
                                                target = plane.destination
                                        end
                                else
                                        if plane.home.waiting.length > 0 or plane.passengers.length > 0
                                          if plane.dayschedule[self.time.strftime("%w").to_i] == 1
                                                  target = plane.home
                                                end
                                        end
                                end
                                
                                if target
                                        addLog "PICKTARGET #{plane.tail} #{target} [#{plane.passengers.length} pax /#{total_waiting} demand]"
                                        plane.target target
                                end                                        
                        end
                end
        end

        def total_waiting
                tot = 0
                @people.each {|a| tot += 1 if a.waiting}
                tot
        end
                
        def setVersion
                  @version = WORLD_VERSION
        end

        def build_distances
                  @distances = {}
                  for a in self.airports
                          for b in self.airports
                            if a!=b
                              @distances[[a,b]] = a.distance_to(b) 
                              @bearings[[a,b]] = a.bearing_to(b)
                            end
                          end
                  end
        end

        def randomArrivalAirport(exclude = nil)
                  airports = @airports#.select{|a| a.arrival.to_i == 1}
                  if airports.length > 0
                          airport = (airports - exclude).sort_by{rand}[0]
                  else
                          airport = nil
                  end
                  addLog "RAA #{airport} (of #{airports.length} choices)"
                  airport
        end
        
        def randomAirport(exclude = nil)
                  (@airports - exclude).sort_by{rand}[0]
        end
        
        def getAirport(index)
                  @airports[index]
        end
        
        def airportCount
                  @airports.length
        end
        
        def delAirport(index)
                p = getAirport index
                p.name = "Deleted"
                @airports.delete p
        end
        
        def addAirport(airport)
                @airports << airport
                build_distances
        end

        def getPlane(index)
                @planes[index]
        end
        
        def planeCount
                @planes.length
        end
        
        def delPlane(index)
                p = getPlane index
                p.tail = "Deleted"
                @planes.delete p
        end
        
        def addPlane(plane)
                @planes << plane
        end
        
        def tick_month
                for p in @people
                        p.tick_month
                end
        end

        def tick_day
                for p in @people
                        p.tick_day
                end
        end

        def tick
                @time += 60*6
                
                @planes.sort_by{rand}.each {|plane| plane.think}
                @airports.sort_by{rand}.each {|airport| airport.think}
                @people.sort_by{rand}.each {|pax| pax.think}

                newday = ((@time-@run_start_time)/(60*60*24)).floor
                newmonth = @time.strftime("%m").to_i
                
                if @day != newday
                        tick_day
                end
                
                if @month = newmonth
                        tick_month
                end
                
                @day = newday
                @month=newmonth
        end
        
        def sanity_check(world, version)
                clearLog
                @world = world
                @version = version
                addLog "Simulation Loaded."
                @airports.each{|x| x.sanity_check self, @version}
                @planes.each{|x| x.sanity_check self, @version}
                @people.each{|x| x.sanity_check self, @version}
        end
        
        def populate(pax)
                @people << pax
                addLog "#{pax.name} has entered the world."
        end
        
end