;výška patra: 3m
;100 tick: 3 vteřiny

globals [ elevator-speed passenger-speed elevator-destination elevator-calls elevator-direction activation-time wait-times avg-wait ride-times avg-ride avg-travel total-time ]


breed [ elevators elevator ]

breed [ passengers passenger]
passengers-own [ in-elevator home-floor destination-floor active wait-start wait-stop ride-start ride-stop]

to setup
  clear-all
  reset-ticks

  resize-world 0 4 0 12
  set-patch-size 50

  ; Draw the building floors using the patch column at x = 0
  ask patches with [pxcor = 0] [
    set pcolor gray
    set plabel pycor
    set plabel-color white
  ]

  ; Create one elevator turtle at floor 0
  create-elevators 1 [
    set color red
    set shape "square"
    set size 0.8
    setxy 0 0
  ]

  ; Create 12 passengers on each floor
  let current-floor 1
  while [current-floor <= 12] [
    let passenger-count 0
    while [passenger-count < 12] [
      create-passengers 1 [
        set color blue
        set shape "person"
        set size 0.6
        set home-floor current-floor
        set destination-floor 0
        ; Position passengers in a grid pattern on each floor
        setxy 4 current-floor
        set in-elevator false
        set active false
      ]
      set passenger-count passenger-count + 1
    ]
    set current-floor current-floor + 1
  ]
  set passenger-speed 0.02

  ;set max-elevator-speed 0.01
  set elevator-calls []
  set elevator-direction "idle"
  set elevator-destination 0

  set activation-time 0
  set wait-times []
  set ride-times []
  set total-time "n/a"
end

to reset
  set max-elevator-speed 0.01
  set activate-interval 25
  set alg-down-first true
end

;ranní špička - polovina obyvatel opustí budovu během 30 minut
;průměrně jedno volání za 25 vteřin - 833 ticků
to auto-activate-passengers
  if count passengers with [not active and abs(ycor) > 0.01] > 0 [
    let interval round((activate-interval * 100) / 3)
    if ticks - activation-time > interval [
      set activation-time ticks
      ask one-of passengers with [not active and abs(ycor) > 0.01] [
        set active true
        call-elevator ycor
        set wait-start ticks
      ]
    ]
    set total-time ((ticks * 3) / 100) / 60
  ]
end

to avg-wait-time [times]
  ifelse length times > 0 [
    set avg-wait mean times
  ] [
    set avg-wait 0
  ]
end

to avg-ride-time [times]
  ifelse length times > 0 [
    set avg-ride mean times
  ] [
    set avg-ride 0
  ]
end


to call-elevator [requested-floor]
  ;look algorithm
  if not alg-down-first[
    if not member? requested-floor elevator-calls [
      set elevator-calls lput requested-floor elevator-calls
    ]

    let elevator1 one-of elevators
    let current-floor round [ycor] of elevator1

    if member? current-floor elevator-calls [
      set elevator-destination current-floor
      stop
    ]

    if empty? elevator-calls [
      set elevator-direction "idle"
      stop
    ]


    if elevator-direction = "idle" [
      if requested-floor - current-floor > 0.01 [
        set elevator-direction "up"
      ]
      if requested-floor - current-floor < 0.01 [
        set elevator-direction "down"
      ]
    ]

    let upward   filter [f -> f > current-floor] elevator-calls
    let downward filter [f -> f < current-floor] elevator-calls

    if elevator-direction = "up" and not empty? upward [
      set elevator-destination min upward
    ]

    if elevator-direction = "down" and not empty? downward [
      set elevator-destination max downward
    ]

    if (elevator-direction = "up" and empty? upward) or (elevator-direction = "down" and empty? downward) [
      if first elevator-calls > current-floor [
        set elevator-direction "up"
        set elevator-destination min elevator-calls
      ]
      if first elevator-calls < current-floor [
        set elevator-direction "down"
        set elevator-destination max elevator-calls
      ]
      if first elevator-calls = current-floor [
        set elevator-destination first elevator-calls
      ]
    ]
  ]
  if alg-down-first[
    if not member? requested-floor elevator-calls [
      set elevator-calls lput requested-floor elevator-calls
    ]

    let elevator1 one-of elevators
    let current-floor round [ycor] of elevator1

    if member? current-floor elevator-calls [
      set elevator-destination current-floor
      stop
    ]

    if empty? elevator-calls [
      set elevator-direction "idle"
      stop
    ]

    if elevator-direction = "idle" [
      set elevator-direction "up"
      set elevator-destination max elevator-calls
      stop
    ]

    if elevator-direction = "up" [
      let upward-calls filter [f -> f >= current-floor] elevator-calls
      ifelse not empty? upward-calls [
        set elevator-destination max upward-calls
        stop
      ] [
        set elevator-direction "down"
      ]
    ]

    if elevator-direction = "down" [
      let downward-calls filter [f -> f <= current-floor] elevator-calls
      ifelse not empty? downward-calls [
        set elevator-destination max downward-calls
        stop
      ] [
        set elevator-direction "idle"
      ]
    ]
  ]

end


to passenger-approach-elevator
  let elevator1 one-of elevators
  let elevator-y [ycor] of elevator1

  let waiting-passengers passengers with [active and not in-elevator and abs(ycor - elevator-y) < 0.01]
  let passenger-list sort waiting-passengers

  if length passenger-list > 0 [
    foreach passenger-list [p ->
      ask p [set wait-stop ticks]

      let wait-time (([wait-stop] of p) - ([wait-start] of p)) * 3 / 100
      set wait-times fput wait-time wait-times
      avg-wait-time wait-times

      ask p [set ride-start ticks]

      while [ [xcor] of p > 1 ] [
        ask p [
          set xcor xcor - passenger-speed
        ]
        auto-activate-passengers
        tick
      ]
      ask p [set xcor 1]
    ]
  ]
end


to passenger-geton-behavior
  ask passengers with [active and not in-elevator] [
    let elevator1 one-of elevators
    if abs(ycor - [ycor] of elevator1) < 0.01 and abs(xcor - 1) < 0.01 [
      set in-elevator true
      setxy 0 [ycor] of elevator1
      call-elevator destination-floor
    ]
  ]
end

to passenger-ride-behavior
  ; Pasažér vystoupí, pokud je v přízemí
  ask passengers with [in-elevator] [
    let elevator1 one-of elevators
    set ycor [ycor] of elevator1
  ]
end

to passenger-getof-behavior
  let exiting-passengers sort (passengers with [in-elevator and active and abs(ycor - destination-floor) < 0.01])

  foreach exiting-passengers [p ->
    ask p [set ycor destination-floor]
    while [abs([xcor] of p - 4) > 0.01] [
      ask p [
        set xcor xcor + passenger-speed
      ]
      tick
    ]

    ask p [
      set xcor 4
      set in-elevator false
      set active false

      ifelse destination-floor = 0 [
        set destination-floor home-floor
      ][
        set destination-floor 0
      ]

      set ride-stop ticks
    ]
    let ride-time (([ride-stop] of p) - ([ride-start] of p)) * 3 / 100
    set ride-times fput ride-time ride-times
    avg-ride-time ride-times

    set avg-travel avg-wait + avg-ride
  ]
end

to move-elevator
  if count elevators = 0 [
    user-message "No elevator present. Press the Setup button first."
    stop
  ]

  let elevator1 one-of elevators
  let acceleration 0.0001
  set elevator-speed 0
  let target elevator-destination

  if abs([ycor] of elevator1 - target) > 0.0001 [
    while [ abs([ycor] of elevator1 - target) > 0.0001 ] [
      let direction (ifelse-value [ycor] of elevator1 < target [1] [-1])
      let target-distance abs([ycor] of elevator1 - target)
      let stop-distance (elevator-speed * elevator-speed) / (2 * acceleration)

      ifelse stop-distance < target-distance [
        set elevator-speed min (list (elevator-speed + acceleration) max-elevator-speed)
      ] [
        set elevator-speed max (list (elevator-speed - acceleration) 0.0001)
      ]

      ask elevator1 [
        set ycor ycor + (direction * elevator-speed)
      ]
      passenger-ride-behavior

      auto-activate-passengers
      tick
    ]
  ]


  set elevator-calls remove target elevator-calls
  ask elevator1 [ set ycor target ]

  passenger-getof-behavior
  passenger-approach-elevator
  passenger-geton-behavior

  ifelse not empty? elevator-calls [
    call-elevator first elevator-calls
  ] [
    set elevator-direction "idle"
  ]

end


to go
  move-elevator
  auto-activate-passengers
  tick
end





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## WHAT IS IT?

(a general understanding of what the model is trying to show or explain)

## HOW IT WORKS

(what rules the agents use to create the overall behavior of the model)

## HOW TO USE IT

(how to use the model, including a description of each of the items in the Interface tab)

## THINGS TO NOTICE

(suggested things for the user to notice while running the model)

## THINGS TO TRY

(suggested things for the user to try to do (move sliders, switches, etc.) with the model)

## EXTENDING THE MODEL

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## NETLOGO FEATURES

(interesting or unusual features of NetLogo that the model uses, particularly in the Code tab; or where workarounds were needed for missing features)

## RELATED MODELS

(models in the NetLogo Models Library and elsewhere which are of related interest)

## CREDITS AND REFERENCES

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