noflo = require 'noflo'

exports.getComponent = ->
  c = new noflo.Component
  c.description = "base human-behavior-model component to build onto"
  c.icon = "question"

  # base in ports which all HBM components should have
  @inPorts =
    average: new noflo.Port 'number'
    variance: new noflo.Port 'number'
    max: new noflo.Port 'number'
    min: new noflo.Port 'number'

  # init values
  @average = 0
  @variance = 1
  @max = 3
  @min = -3
  # setters
  @inPorts.average.on 'data', (@average) =>
  @inPorts.variance.on 'data', (@variance) =>
  @inPorts.max.on 'data', (@max) =>
  @inPorts.min.on 'data', (@min) =>

  # init with an array of average values (to help reolve loops)
  #TODO: randomize this series instead of using avg?
  MAX_LEN = 1000  # max time steps in simulation TODO: how can I better guess this
  @values = (@average for [1..MAX_LEN])

  # function to get value @ t from dependency time-series objects
  @step = (t, dep1, dep2)=>
    return dep1[t] + dep2[t]  # TODO: handle out-of-bounds t by wrapping array calls in a function?

  @compute = ()=>
    for t of values
     # compute value for given dependencies
     @values[t] = @step(t, dep1, dep2)  # TODO: where to get these dep time-series from? store them on object or are they already on c?

    c.outPorts.out.send values

  # inflows (dependencies)
  c.inPorts.add 'dep1', (event, payload) =>
    if event is 'data'
      @dep1 = payload
      @compute()

  c.inPorts.add 'dep2', (event, payload) =>
    if event is 'data'
      @dep2 = payload
      @compute()

  # array of values
  c.outPorts.add 'out'

  return c