###############################################################################
### CMSC330 Project 6: Multi-threaded Train Simulation                      ###
### Source code: metro.rb                                                   ###
### Description: A multi-threaded Ruby program that simulates               ###
###              the Washington Metro by creating Train and Person threads  ###
###############################################################################

require "monitor"
Thread.abort_on_exception = true   # to avoid hiding errors in threads 
        
#----------------------------------------------------------------
# Metro Simulator
#----------------------------------------------------------------

def simulate(lines,numTrains,passengers,simMonitor)

    # puts lines.inspect
    # puts numTrains.inspect
    # puts passengers.inspect
    # puts simMonitor.inspect

end

#----------------------------------------------------------------
# Simulation Display
#----------------------------------------------------------------

# line = hash of line names to array of stops
# stations = hash of station names =>
#                  hashes for each line => hash of trains at station
#               OR hash for "passenger" => hash of passengers at station
# trains = hash of train names =>  hash of passengers

def displayState(lines,stations,trains)
    lines.keys.sort.each { |color|
        stops = lines[color]
        puts color
        stops.each { |stop| 
            pStr = ""
            tStr = ""
            
            stations[stop]["passenger"].keys.sort.each { |passenger|
                pStr << passenger << " "
            }
            
            stations[stop][color].keys.sort.each { |trainNum| 
                tr = color+" "+trainNum
                tStr << "[" << tr
                if trains[tr] != nil
                    trains[tr].keys.sort.each { |p|
                        tStr << " " << p
                    }
                end
                tStr << "]"
            }
            
            printf("  %25s %10s %-10s\n", stop, pStr, tStr)
        }	
    }
    puts 
end

def display(lines,passengers,output)

    # puts lines.inspect
    # puts passengers.inspect
    # puts output.inspect

    stations = {}
    trains = {}
    output.each {|o|
        puts o
        displayState(lines,stations,trains)
    }
end

#----------------------------------------------------------------
# Simulation Verifier
#----------------------------------------------------------------

def verify(lines,numTrains,passengers,output)

    # puts lines.inspect
    # puts numTrains.inspect
    # puts passengers.inspect
    # puts output.inspect

    # return false
    return true
end