breed [seeds seed ]
breed [leechers leecher]
leechers-own [ chunks-needed up-b down-b down-left]
seeds-own [chunks-needed up-b]
links-own [weight]

;;;;;;;;;;;;;;;;;;;;;;;;
;;; Setup Procedures ;;;
;;;;;;;;;;;;;;;;;;;;;;;;

to setup
  clear-all
  set-default-shape turtles "circle"
  ;; make the initial network with one initial seed and three leecher
  create-seeds 1
  [ set color lime
    set size 3 
    set chunks-needed []
    set up-b Upload
  ]
  repeat NumNodes
  [
    make-node
  ]
  layout
end

;;;;;;;;;;;;;;;;;;;;;;;
;;; Main Procedures ;;;
;;;;;;;;;;;;;;;;;;;;;;;

to go
  calc-edge-weights
  transfer-chunks
  add-remove-nodes
  adjust-connections
  tick
  ;;if layout? [ layout ]
  do-plot
end


to adjust-connections
;;Decide if we need to drop any connections
  ask leechers [
    switch-connection
  ]
;;Decide if we need to add new connections
  ask leechers [
    grow
  ]
;;If we have some alloted bandwith left, connect to a nieghbors neighbor
end

;;Check if our neighbor has something we need, if they don't, connect to one of his random neighbors
to switch-connection
  foreach sort in-link-neighbors
  [
     let chunk-to-download find-chunk chunks-needed [chunks-needed] of ?
     if chunk-to-download = false
     [
       let new-neighbor one-of other [in-link-neighbors]  of ?
       if new-neighbor != nobody
       [
         create-link-from new-neighbor
         ask in-link-from ? [
           die
         ]
       ]
     ]
  ]
end


;;If we have some un-allocated bandwith, connect to a new node, which is one of our neighbors neighbors
to grow
  if down-left > 0
  [
    let my-neighbors sort in-link-neighbors
    set my-neighbors sentence my-neighbors sort out-link-neighbors
    let neighbors-neighbors []
    foreach my-neighbors
    [
      set neighbors-neighbors sentence neighbors-neighbors sort [in-link-neighbors] of ?
      set neighbors-neighbors sentence neighbors-neighbors sort [out-link-neighbors] of ?
    ]
    foreach my-neighbors
    [
      set neighbors-neighbors remove ? neighbors-neighbors
    ]
      set neighbors-neighbors remove self neighbors-neighbors
    if not empty? neighbors-neighbors [
      create-link-from one-of neighbors-neighbors
    ]
  ]
end
;;Calculate edge weights & Helper Functions
to calc-edge-weights
  ask turtles [
    adjust-out-links
  ]
  ask leechers [
     adjust-in-links
  ]
end

to adjust-out-links
   if(any? my-out-links)[
     let bandwidth up-b / count my-out-links
     ask my-out-links [ 
       set weight bandwidth
       ifelse weight = 0
       [set color red]
       [set color green]
     ]
   ]
end

to adjust-in-links
let bandwidth down-b
  foreach sort-by [[weight] of ?1 > [weight] of ?2] my-in-links [
    let new-weight min list [weight] of ? bandwidth
    set [weight] of ? new-weight
    if new-weight = 0 and count my-in-links > Min-Links
    [
     ask ? 
     [
       die
     ]
    ]
    set bandwidth bandwidth - new-weight - connection-cost
  ]
  
set down-left bandwidth
end

;;Transfer Chunks & Helper Functions
to transfer-chunks
  ask leechers [
      download-chunks
  ]
end

to download-chunks
  foreach sort in-link-neighbors [
         let neighbor-chunks [chunks-needed] of ?
         let chunk-to-download find-chunk chunks-needed neighbor-chunks
         if(not(chunk-to-download = false))[
             if(random-float 1 < [weight] of in-link-from ?)[
               set chunks-needed remove chunk-to-download chunks-needed
               ifelse length chunks-needed < NumChunks / 2
               [ifelse up-b > 0
                [set color cyan]
                [ set color yellow]]
               [ifelse length chunks-needed < NumChunks / 2
                [ifelse up-b > 0
                [set color sky]
                [set color brown]]
                [if length chunks-needed < NumChunks / 4 * 3
                [ifelse up-b > 0
                [set color blue]
                [set color orange]]]]
             ]]]
end

to-report find-chunk [my-list other-list]
   foreach shuffle my-list [
       if(not(member? ? other-list))[
           report ?
       ]
   ]
   report false
end 


;;Add / Remove Nodes & Helper Functions
to add-remove-nodes
  ;;Add Nodes
  if(random-float 1 < (NewNode / 100))[
    make-node
  ]
  ;;Check if Nodes are done
  ask leechers [
    if(empty? chunks-needed)[
       ifelse up-b > 0
       [set color green]
       [set color turquoise]
       ask my-in-links [
         die
       ]
    ]
  ]
  ;;Remove some Nodes
  ask leechers [
    if(empty? chunks-needed)[
      if(random-float 1 < (LeaveNetwork / 100))[
        die
      ] 
    ]
  ]
end
  
;; used for creating a new node
to make-node
  create-leechers 1
  [
    set chunks-needed []
    while [length chunks-needed < NumChunks]
    [ set chunks-needed fput length chunks-needed chunks-needed ]
    set size 2
    ifelse (random-float 1 > Selfishness)
    [
     set up-b Upload
     set color violet]
    [
     set up-b 0
     set color red
    ]
    set down-b Download 
    set down-left Download
    if any? leechers
      [ 
        repeat 2
        [let old-node one-of other turtles
        create-link-from old-node [ set color green ]
        ;; position the new node near its partner
        move-to old-node
        fd 8]
      ]
  ]
end

;;;;;;;;;;;;;;
;;; Layout ;;;
;;;;;;;;;;;;;;

;; resize-nodes, change back and forth from size based on degree to a size of 1
to resize-nodes
  ifelse all? turtles [size <= 1]
  [
    ;; a node is a circle with diameter determined by
    ;; the SIZE variable; using SQRT makes the circle's
    ;; area proportional to its degree
    ask turtles [ set size sqrt count link-neighbors ]
  ]
  [
    ask turtles [ set size 1 ]
  ]
end

to layout
  let avrg-links average-degree
  ask leechers
  [
    let num-out-links count my-out-links
    set size num-out-links / (avrg-links + .5 ) + 2
  ]
  repeat 30 [ layout-spring turtles links 0.1 10 5 ]
end

to-report limit-magnitude [number limit]
  if number > limit [ report limit ]
  if number < (- limit) [ report (- limit) ]
  report number
end

to do-plot
  if calc-dist >= 95
  [
      print ticks
  ]
  set-current-plot "File Distribution"
  set-current-plot-pen "AvrgDist"
  plot calc-dist
  set-current-plot "Average Degree"
  plot average-degree
  set-current-plot "In Degree Distribution"
  set-current-plot-pen "in-degree-distro"
  set-plot-pen-mode 1
  histogram in-degree-hist
  set-current-plot "Out Degree Distribution"
  set-current-plot-pen "out-degree-distro"
  set-plot-pen-mode 1
  histogram out-degree-hist 
end

to-report in-degree-hist
  let in-degree []
  foreach sort turtles
  [ 
    set in-degree lput count [my-in-links] of ? in-degree
  ]
  report in-degree
end

to-report out-degree-hist
  let out-degree []
  foreach sort turtles
  [
    set out-degree lput count [my-out-links] of ? out-degree
  ]
  report out-degree
end

to-report average-degree
  let in-links 0
  foreach sort turtles
  [
    set in-links in-links + count [my-in-links] of ?
  ]
  report in-links / count turtles
end

to-report calc-dist
let dist 0
ask turtles
[ set dist dist + NumChunks - length chunks-needed ]
report dist / length sort turtles / NumChunks * 100
end
@#$#@#$#@
GRAPHICS-WINDOW
581
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10
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0
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1
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ticks

CC-WINDOW
5
641
1353
736
Command Center
0

BUTTON
6
25
72
58
NIL
setup
NIL
1
T
OBSERVER
NIL
NIL
NIL
NIL

BUTTON
77
61
136
94
NIL
go
T
1
T
OBSERVER
NIL
NIL
NIL
NIL

BUTTON
6
61
71
94
go-once
go
NIL
1
T
OBSERVER
NIL
NIL
NIL
NIL

SWITCH
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24
223
57
layout?
layout?
0
1
-1000

BUTTON
140
61
225
94
redo layout
layout
T
1
T
OBSERVER
NIL
NIL
NIL
NIL

SLIDER
3
104
175
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NewNode
NewNode
0
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6
1
1
%
HORIZONTAL

SLIDER
4
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LeaveNetwork
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0
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INPUTBOX
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NumChunks
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1
0
Number

PLOT
233
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432
486
File Distribution
Time
Avrg File Distirbution
0.0
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true
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PENS
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"AvrgFileDist" 1.0 0 -16777216 true

PLOT
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Out Degree Distribution
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Frequency
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PENS
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PLOT
233
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In Degree Distribution
Degree
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0.0
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0.0
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true
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PENS
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SLIDER
177
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Download
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0
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SLIDER
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172
Upload
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0
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NIL
HORIZONTAL

INPUTBOX
228
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85
NumNodes
30
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0
Number

PLOT
5
335
212
485
Average Degree
NIL
NIL
0.0
10.0
0.0
10.0
true
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PENS
"default" 1.0 0 -16777216 true

SLIDER
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28
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61
Selfishness
Selfishness
0
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0.5
0.05
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NIL
HORIZONTAL

INPUTBOX
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166
connection-cost
0.1
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Number

INPUTBOX
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Min-Links
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@#$#@#$#@
@#$#@#$#@
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airplane
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arrow
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box
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bug
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butterfly
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car
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Circle -7500403 true true 195 195 58

circle
false
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circle 2
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cow
false
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Polygon -7500403 true true 25 114 16 195 9 204 23 213 25 200 39 123

cylinder
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dot
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face happy
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Polygon -16777216 true false 150 255 90 239 62 213 47 191 67 179 90 203 109 218 150 225 192 218 210 203 227 181 251 194 236 217 212 240

face neutral
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Circle -16777216 true false 60 75 60
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face sad
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Circle -16777216 true false 60 75 60
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fish
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flag
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Polygon -7500403 true true 90 150 270 90 90 30
Line -7500403 true 75 135 90 135
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flower
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Circle -7500403 true true 70 85 38
Circle -7500403 true true 130 25 38
Circle -7500403 true true 96 51 108
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house
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leaf
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line
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line half
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pentagon
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person
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Polygon -7500403 true true 105 90 60 150 75 180 135 105

plant
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Polygon -7500403 true true 135 255 90 210 45 195 75 255 135 285
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Polygon -7500403 true true 135 105 90 60 45 45 75 105 135 135
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square
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square 2
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star
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target
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tree
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Rectangle -6459832 true false 120 195 180 300
Circle -7500403 true true 65 21 108
Circle -7500403 true true 116 41 127
Circle -7500403 true true 45 90 120
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triangle
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triangle 2
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truck
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Polygon -7500403 true true 296 193 296 150 259 134 244 104 208 104 207 194
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Circle -16777216 true false 234 174 42
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Circle -16777216 true false 144 174 42
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Circle -7500403 false true 24 174 42
Circle -7500403 false true 144 174 42
Circle -7500403 false true 234 174 42

turtle
true
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Polygon -10899396 true false 132 85 134 64 107 51 108 17 150 2 192 18 192 52 169 65 172 87
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wheel
false
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Circle -7500403 true true 3 3 294
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Line -7500403 true 15 150 285 150
Circle -7500403 true true 120 120 60
Line -7500403 true 216 40 79 269
Line -7500403 true 40 84 269 221
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x
false
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Polygon -7500403 true true 270 75 225 30 30 225 75 270
Polygon -7500403 true true 30 75 75 30 270 225 225 270

@#$#@#$#@
NetLogo 4.0
@#$#@#$#@
set layout? false
set plot? false
setup repeat 300 [ go ]
repeat 100 [ layout ]
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
default
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@#$#@#$#@