;define different breeds of agents available in the model.
breed [governments government]
breed [businesses business]
breed [households household]
breed [monies money]
breed [persons person]
breed [goods good]

;define globals, globals are variables that can be used anywhere in the model after they are "set".
globals[
  startyear
  currentyear
  futureyear

  currenttax
  futuretax
  totaltaxchange
  taxflow

  totalxchange

  BNP
  originalBNP

  unemployment
  originalunemployment
]

;patches and agents can own different variables, they are defined below
turtles-own[partner]
monies-own[origin destination]
persons-own[origin destination]
goods-own[origin destination]

;setup is run only once, when the setup button is pressed in the graphical interface. It clears the model and then sets up the model.
to setup
  clear-all
  setup-patches
  setup-agents
  set startyear 2017
  set currentyear 2017
  set futureyear currentyear + 1
  set currenttax 407300
  set originalBNP 100
  set BNP originalBNP
  set originalunemployment 100
  set unemployment originalunemployment
  set tax 0
  set xx 0
end

;go runs indefinetly if the go-forever button is pressed. The code is run from top to bottom and then loops back to the start after the end.
to go
  update-flows
  update-view
  if(currentyear > startyear and currentyear = futureyear)[
    update-BNP
    update-unemployment
    set futuretax currenttax + (currenttax * (tax / 100))
    set currenttax futuretax
    set totaltaxchange totaltaxchange + tax
    set totalxchange totalxchange + xx
    set tax 0
    set xx 0
    set futureyear futureyear + 1
  ]
end

;this method updates the current BNP number if the tax variable is not equal to 0 (!= 0)
to update-BNP
  if(tax != 0)
  [
    if(tax > 0)
      [
        set BNP BNP + (tax * -1)
      ]
    if(tax < 0)
      [
        set BNP BNP + (abs tax * 1)
      ]
  ]
  if(xx != 0)
  [
    if(xx < 0)
      [
        set BNP BNP + (abs xx * -0.5)
      ]
    if(xx > 0)
      [
        set BNP BNP + (xx * 0.5)
      ]
  ]
end

;this method updates the current unemployment number if the tax variable is not equal to 0 (!= 0).
to update-unemployment
  if(tax != 0)
  [
    if(tax > 0)
      [
        set unemployment unemployment + (tax * 1)
      ]
    if(tax < 0)
      [
        set unemployment unemployment + (abs tax * -1)
      ]
  ]
  if(xx != 0)
  [
    if(xx < 0)
      [
        set unemployment unemployment + (abs xx * 1)
      ]
    if(xx > 0)
      [
        set unemployment unemployment + (xx * -1)
      ]
  ]
end

;this methods update the tax flow using the absolute value of the taxchange.
to update-flows
  ;update the taxflow, meaning how fast the agents actually moves
  if(totaltaxchange + totalxchange = 0)[
    set taxflow 0.001
  ]
  if(totaltaxchange + totalxchange > 0)[
    if(totaltaxchange + totalxchange < 5)[
          set taxflow 0.001 - (0.001 * ((totaltaxchange + totalxchange) * 20) / 100)
    ]
    if(totaltaxchange + totalxchange >= 5 and totaltaxchange + totalxchange < 50)[
          set taxflow 0.0002 - (0.0002 * ((totaltaxchange + totalxchange) * 2) / 100)
    ]
  ]
  if(totaltaxchange + totalxchange < 0)[
    if(totaltaxchange + totalxchange >= -10)[
          set taxflow 0.001 + (0.001 + (0.001 * ((( abs(totaltaxchange + totalxchange) * 20) / 100) - 1)))
    ]
    if(totaltaxchange + totalxchange < -10)[
          set taxflow 0.003 + (0.003 + (0.003 * ((( abs(totaltaxchange + totalxchange) * 1) / 100) - 1)))
    ]

  ]
end

;this method is the main method used in the model, it updates the view based on the view drop down menu in the interface.
;if the user selects the "Tax" view in the interface, the model visualizes the flow of money based on the current monetary policy.
;if the user selects the "unemployment" view in the interface, the model visualizes the flow of human resources based on the current monetary policy.
;       - People moving to the businesses are employed
;       - People moving to the state are unemployed
;if the user selects the "Goods" view in the interface, the model visualizes the flow of goods based on the current monetary policy.
to update-view

  if(view = "Tax")[
   ask persons[die]
   ask goods [die]

    if(BNP <= originalBNP)[
      ask monies with [destination = "households"][die]
      ask monies with [destination = "businesses"][die]
      ask monies with [destination = "government"][die]

      if(count monies with[origin = "households"] < count households)[
        ask households [hatch-monies 1 [set color green set size 2 set origin "households" set destination "goverenment"]]
      ]
      if(count monies with[origin = "businesses"] < count businesses)[
        ask businesses [hatch-monies 1 [set color green set size 2 set origin "businesses" set destination "goverenment"]]
      ]

      ask monies with [destination = "goverenment"][set heading towards one-of governments]
      ask monies [forward taxflow]
      ask monies with [destination = "goverenment"][if(count governments-here = 1)[die]]
    ]

   if(BNP > originalBNP)[
     ask monies with [origin = "households"][die]
     ask monies with [origin = "businesses"][die]
     ask monies with [destination = "government"][die]

     if(count monies with[destination = "households"] < 1)[
       ask governments [hatch-monies count households [set color green set size 2 set origin "government" set destination "households"]]
       ask monies with [destination = "households" and partner = 0][set partner one-of households with [partner = 0] ask partner[set partner myself]]
    ]
    if(count monies with[destination = "businesses"] < 1)[
      ask governments [hatch-monies count businesses[set color green set size 2 set origin "government" set destination "businesses"]]
      ask monies with [destination = "businesses" and partner = 0][set partner one-of businesses with [partner = 0] ask partner[set partner myself]]
    ]

     ask monies [set heading towards partner]

     ask monies [forward taxflow]
     ask monies [if([who] of partner = one-of [who] of turtles-here)[ask partner[set partner 0] die]]
   ]
  ]

  if(view = "Employment")[
    ask monies[die]
    ask goods[die]

    if(count persons with[origin = "households"] = 0)
    [
      ask turtles [set partner 0]
      ask households [hatch-persons 2 [set color white set size 1 set origin "households" set destination "businesses"]]
      if((originalunemployment - unemployment) / 100 >= 0)[
        ask(n-of (2 - ((originalunemployment - unemployment) / 2))persons with [destination = "businesses"]) [set destination "government"]
      ]
      if((originalunemployment - unemployment) / 100 < 0)[
        ask(n-of (2 - ((originalunemployment - unemployment) / 2))persons with [destination = "businesses"]) [set destination "government"]
      ]
      ask persons with [destination = "businesses"][set heading towards one-of businesses]
      ask persons with [destination = "government"][set heading towards one-of governments]
    ]

    ask persons [forward taxflow]
    ask persons with [destination = "businesses"][if(count businesses-here = 1)[die]]
    ask persons with [destination = "government"][if(count governments-here = 1)[die]]
  ]

   if(view = "Goods")[
    ask monies[die]
    ask persons[die]

    if(BNP <= originalBNP)[
      if(count goods = 0)[
        ask turtles [set partner  0]
        ask businesses [hatch-goods 2 [set color brown set size 1 set origin "businesses" set destination "households"]]
        ask(n-of ((count goods / 100) * (30 + ((abs totaltaxchange + abs totalxchange)  * 2)))goods with [destination = "households"])[set destination "overseas"]
      ]
      ask goods with [destination = "households" and partner = 0][set partner one-of households with [partner = 0] ask partner[set partner myself]]
      ask goods with[destination = "households"][set heading towards partner]
      ask goods with[destination = "overseas"][set heading towards patch 0 -15]

   ]

    if(BNP > originalBNP)[
      if(count goods = 0)[
        ask turtles [set partner 0]
        ask businesses [hatch-goods (((count households / 100) * 70) / count businesses)  [set color brown set size 1 set origin "businesses" set destination "households"]]
        ask patches with [pxcor = 0 and pycor = -15][sprout-goods ((count households / 100) * 30)[set color brown set size 1 set origin "businesses" set destination "households"]]
      ]
      ask goods with [destination = "households" and partner = 0][set partner one-of households with [partner = 0] ask partner[set partner myself]]
      ask goods with[destination = "households"][set heading towards partner]
    ]

    ask goods [forward taxflow]
    ask goods with[destination = "households"][if([who] of partner = one-of [who] of turtles-here)[ask partner[set partner 0] die]]
    ask goods with[destination = "overseas"][if(ycor < -14)[die]]
  ]
end

;this method is run during the setup of the model, and it draws the different areas of seen in the vizual part of the model.
to setup-patches
  ;setup goverenment area
  ask patches with [pxcor >= -16 and pxcor <= 16 and pycor > 9] [
    set pcolor orange]
  ask patches with [pxcor = 0 and pycor = 11][
    set plabel "Staten"]

  ;setup household area
  ask patches with [pxcor >= -16 and pxcor < 0 and pycor <= 9] [
    set pcolor green]
  ask patches with [pxcor = -11 and pycor = 6][
    set plabel "Husholdninger"]

  ;setup business area
  ask patches with [pxcor > 0 and pxcor <= 16 and pycor <= 9] [
    set pcolor blue]
  ask patches with [pxcor = 15 and pycor = 6][
    set plabel "Virksomheder"]

  ;setup neutral area
  ask patches with [pxcor = 0 and pycor > -12 and pycor <= 9] [
    set pcolor white]
  ask patches with [pxcor >= -16 and pxcor <= 16 and pycor = 9] [
    set pcolor white]
  ask patches with [pxcor >= -5 and pxcor <= 5 and pycor <= -11] [
    set pcolor white]

  ;setup ??? area
  ask patches with [pxcor >= -4 and pxcor <= 4 and pycor <= -12] [
    set pcolor black]
  ask patches with [pxcor = 0 and pycor = -15][
    set plabel "???"]
end

;this method sets up the different agents. It defines the shapes of potential agents and the spawns the initial agents into the world (government, houses and businesses).
to setup-agents
  ;define shapes for agents
  set-default-shape governments "building institution"
  set-default-shape businesses "factory"
  set-default-shape households "house efficiency"
  set-default-shape monies "dollar bill"
  set-default-shape persons "person"
  set-default-shape goods "box"

  ;create 1 government building at a specific coordinate
  create-governments 1 [set xcor 0 set ycor 14 set size 4 set color white]

  ;create 10 house at a random point in the green area
  create-households 10 [set color white set size 2.5]
  ask households [move-to one-of patches with [pcolor = green]]

  ;create 5 businesses at a random point in the blue area
  create-businesses 5 [set color white set size 3.5]
  ask businesses [move-to one-of patches with [pcolor = blue]]
end
@#$#@#$#@
GRAPHICS-WINDOW
210
10
647
448
-1
-1
13.0
1
10
1
1
1
0
0
0
1
-16
16
-16
16
0
0
1
ticks
30.0

BUTTON
142
10
208
43
NIL
setup
NIL
1
T
OBSERVER
NIL
NIL
NIL
NIL
1

BUTTON
142
43
208
76
NIL
go
T
1
T
OBSERVER
NIL
NIL
NIL
NIL
1

SLIDER
209
449
647
482
tax
tax
-10
10
0.0
1
1
%
HORIZONTAL

MONITOR
140
112
210
157
Year
currentyear
17
1
11

BUTTON
120
77
210
110
Next year
set currentyear currentyear + 1
NIL
1
T
OBSERVER
NIL
NIL
NIL
NIL
1

CHOOSER
72
157
214
202
View
View
"Tax" "Employment" "Goods"
0

MONITOR
18
250
208
295
Total tax change in %
totaltaxchange
17
1
11

MONITOR
17
295
209
340
NIL
BNP
17
1
11

MONITOR
17
339
209
384
Unemployment
Unemployment
17
1
11

SLIDER
209
489
647
522
xx
xx
-10
10
0.0
1
1
%
HORIZONTAL

@#$#@#$#@
## 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

(suggested things to add or change in the Code tab to make the model more complicated, detailed, accurate, etc.)

## 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

(a reference to the model's URL on the web if it has one, as well as any other necessary credits, citations, and links)
@#$#@#$#@
default
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airplane
true
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arrow
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circle
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circle 2
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cylinder
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dollar bill
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