nbepa1-socg-nw.nlogo

extensions [nw]

globals [
  initial-distribution
  n-of-strategies
  n-of-players
  payoffs
  strategy-numbers

  n-of-links
  connected-players
]

breed [players player]

players-own [
  strategy
  next-strategy
  my-nbrs
]

;;;;;;;;;;;;;
;;; SETUP ;;;
;;;;;;;;;;;;;

to startup
  clear-all
  setup-variables
  build-initial-network
  setup-players
  setup-graph
  reset-ticks
  update-graph
end

to setup-variables
  set initial-distribution read-from-string n-of-players-for-each-strategy
  set n-of-players sum initial-distribution
  set n-of-strategies length initial-distribution

  set payoffs n-values n-of-strategies [[i] -> insert-item i n-values (n-of-strategies - 1) [0] (i + 1)]
  print-payoffs
  set strategy-numbers (range 1 (n-of-strategies + 1))
end

to print-payoffs
  clear-output
  output-print "Payoff matrix: "
  output-print put-sublists-in-different-lines (word payoffs)
end

to setup-players
  ;; here we have to make sure that strategies are assigned
  ;; independently of the who number of the agents
  let cum-list [0]
    ;; cum-list first value is 0 and is (n-of-strategies + 1) items long
  foreach initial-distribution [? -> set cum-list lput (? + last cum-list) cum-list]

  let players-list shuffle sort players
  let i 1
  (foreach (but-last cum-list) (but-first cum-list) [ [n1 n2] ->
    let l sublist players-list n1 n2
    ask turtle-set l [
      set strategy i
      set next-strategy strategy
      update-color
    ]
    set i (i + 1)
  ])
end

to setup-graph
  set-current-plot "Strategy Distribution"
  foreach strategy-numbers [ i ->
    create-temporary-plot-pen (word i)
    set-plot-pen-mode 1
    set-plot-pen-color 35 + 50 * i
   ]
end

;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; NETWORK CONSTRUCTION ;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;

to build-initial-network
  set-default-shape players "circle"
  run (word "build-" network-model "-network")
  ask players [set my-nbrs link-neighbors]
  ask players [ fd 3 ]
  set connected-players players with [any? link-neighbors]
  ask connected-players [ fd 12 ]
  set n-of-links count links
end


to build-Erdos-Reny-network
  nw:generate-random players links n-of-players prob-link
end

to build-small-world-network
 nw:generate-watts-strogatz players links n-of-players (avg-degree-small-world / 2) prob-rewiring
end

to build-preferential-attachment-network
  nw:generate-preferential-attachment players links n-of-players 1
end

to build-ring-network
  nw:generate-ring players links n-of-players
end

to build-star-network
  nw:generate-star players links n-of-players
end

to build-grid-4-nbrs-network
  let players-per-line (ceiling sqrt n-of-players)
  nw:generate-lattice-2d players links players-per-line players-per-line false
  ask n-of (count players - n-of-players) players [die]
end

;;;;;;;;;;
;;; GO ;;;
;;;;;;;;;;

to go

  if any? connected-players [

  (ifelse

    updating = "synchronous"
    [
      ask connected-players [update-next-strategy]
      ask connected-players [set strategy next-strategy]
    ]

    updating = "asynch random independent"
    [
      repeat n-of-players [
        ask one-of connected-players [
          update-next-strategy
          set strategy next-strategy
        ]
      ]
    ]

    updating = "asynch random order"
    [
      ask connected-players [
        update-next-strategy
        set strategy next-strategy
      ]
    ]
  )

  ]

  tick

  update-graph
  ask connected-players [update-color]
end

;;;;;;;;;;;;;;;;
;;; Revision ;;;
;;;;;;;;;;;;;;;;

to update-next-strategy
  ifelse (random-float 1 < noise)
    [ set next-strategy (one-of strategy-numbers) ]
    [ ;; BEP test-all, uniform-if-tie
      let payoffs-for-each-strategy map [s -> payoff-for-one-trial s ] strategy-numbers
      set next-strategy 1 + one-of max-positions payoffs-for-each-strategy
    ]
end

to-report payoff-for-one-trial [s]
  report item ([strategy] of one-of my-nbrs - 1) (item (s - 1) payoffs)
end

;;;;;;;;;;;;;;
;;; Graphs ;;;
;;;;;;;;;;;;;;

to update-graph
  let strategy-frequencies map [n -> count players with [strategy = n] / n-of-players] strategy-numbers

  set-current-plot "Strategy Distribution"
  let bar 1
  foreach strategy-numbers [ n ->
    set-current-plot-pen (word n)
    plotxy ticks bar
    set bar (bar - (item (n - 1) strategy-frequencies))
  ]
  set-plot-y-range 0 1
end

to update-color
  set color 35 + 50 * strategy
end

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

;; the code in the following 3 procedures has been borrowed and slightly adapted from
;; models in the NetLogo models library, so the credit should go to Uri Wilenski and his team

to relax-network
  ;; the number 3 here is arbitrary; more repetitions slows down the
  ;; model, but too few gives poor layouts
  repeat 3 [
    ;; the more players we have to fit into the same amount of space,
    ;; the smaller the inputs to layout-spring we'll need to use
    let factor sqrt count players
    ;; numbers here are arbitrarily chosen for pleasing appearance
    layout-spring (players with [any? link-neighbors]) links (1 / factor) (7 / factor) (3 / factor)
    display  ;; for smooth animation
  ]
  ;; don't bump the edges of the world
  let x-offset max [xcor] of players + min [xcor] of players
  let y-offset max [ycor] of players + min [ycor] of players
  ;; big jumps look funny, so only adjust a little each time
  set x-offset limit-magnitude x-offset 0.1
  set y-offset limit-magnitude y-offset 0.1
  ask players [ setxy (xcor - x-offset / 2) (ycor - y-offset / 2) ]
end

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

to drag-and-drop
  if mouse-down? [
    let candidate min-one-of players [distancexy mouse-xcor mouse-ycor]
    if [distancexy mouse-xcor mouse-ycor] of candidate < 1 [
      ;; The watch primitive puts a "halo" around the watched turtle.
      watch candidate
      while [mouse-down?] [
        ;; If we don't force the view to update, the user won't
        ;; be able to see the turtle moving around.
        display
        ;; The subject primitive reports the turtle being watched.
        ask subject [ setxy mouse-xcor mouse-ycor ]
      ]
      ;; Undoes the effects of watch
      reset-perspective
    ]
  ]
end

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Supporting procedures ;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

to-report max-positions [numbers]
  let biggest max numbers
  report filter [ [n] -> item n numbers = biggest] (range (length numbers))
end

to-report put-sublists-in-different-lines [s]
  let open-bracket-pos position "[" s
  set s substring s (open-bracket-pos + 1) (length s)
  let close-bracket-pos -1

  let new-s "["

  set open-bracket-pos position "[" s
  while [open-bracket-pos != false] [
    set close-bracket-pos position "]" s
    set new-s (word new-s (substring s open-bracket-pos (close-bracket-pos + 1)) "\n ")
    set s substring s (close-bracket-pos + 1) (length s)
    set open-bracket-pos position "[" s
  ]
  report (word substring new-s 0 (length new-s - 2) "]")
end
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