window.makeStudents = function(){
  var seed = new Math.seedrandom('12fbsab56')
  var rand = d3.randomUniform.source(seed)(0, 1)

  var ncols = 12

  var allStudents = d3.range(756).map(i => {
    var age = ages[Math.floor(rand()*ages.length)]
    var state = states[Math.floor(rand()*states.length)]
    var season = Math.floor(rand()*4)
    var heads = rand() < .5

    if (rand() < .1) state = 'NY'
    if (rand() < .5 && state == 'RI') state = states[Math.floor(rand()*states.length)]
    if (rand() < .5 && state == 'CT') state = states[Math.floor(rand()*states.length)]

    var coinVals = d3.range(300).map(rand).slice(0, 200)

    return {age, state, i, pos: {}, group: {}, season, heads, coinVals, isAdditionalStudent: true}
  })

  var students = allStudents.slice(0, 144)
  students.forEach(student => student.isAdditionalStudent = false)

  students.all = allStudents
  students.all.forEach((d, i) => {
    var x = (i % 25)/25*c.width
    var y = ~~(i/25)/25*c.width
    d.pos.all = [x, y]
  })

  var {bw, ageScale, stateScale} = axii
  _.sortBy(students, d => -d.age).forEach((d, i) => {
    var x = (i % ncols)/(ncols - 1)*c.width
    var y = ~~(i/ncols)/(ncols - 1)*c.width
    d.pos.grid = [x, y]
    scale = .6
    d.pos.smallGrid = [x * scale + 90, y * scale]
  })

  // Set half the student to have plagerized.
  var studentsPlagerizedArray = _.sortBy(d3.range(students.length).map(i => i % 2 == 0), () => rand())
  // var remainingPlagerizedArray = _.sortBy(d3.range(allStudents.length - students.length).map(i => i % 2 == 0), () => rand())
  remainingPlagerizedArray = d3.range(students.all.length).map(i => i % 2 == 1)
  var plagerizedArray = studentsPlagerizedArray.concat(remainingPlagerizedArray)
  students.all.forEach((d, i) => d.plagerized = plagerizedArray[i])

  students.byAge = d3.nestBy(students, d => d.age)
  students.byAge.forEach(age => {
    age.forEach((d, i) => {
      d.pos.age = [i*10, ageScale(d.age) + bw]
    })
  })
  students.byAgeState = d3.nestBy(students, d => d.age + d.state)
  students.byAgeState.forEach(group => {
    var d0 = group.d0 = group[0]
    group.pos = [bw + stateScale(d0.state), bw + ageScale(d0.age)]

    var angle = Math.PI*(3 - Math.sqrt(5))*(1 + Math.random()*.05 - .05/2)
    group.forEach((d, i) => {
      d.pos.ageState = addVec(phyllotaxis(i, 10.5, angle), group.pos)
      d.group.ageState = group
    })
  })

  students.byAgeStateSeason = d3.nestBy(students, d => d.age + d.state + d.season)
  students.byAgeStateSeason.forEach(group => {
    var d0 = group.d0 = group[0]
    group.pos = [bw + stateScale(d0.state), bw*d0.season/2 + ageScale(d0.age)]

    group.forEach((d, i) => {
      d.pos.ageStateSeason = addVec([i*11 - group.length*11/2 + 6, 12], group.pos)
      d.group.ageStateSeason = group
    })
  })


  students.updateHeadsPos = function(){
    students.byHeads = d3.nestBy(students, d => d.coinVals[estimates.active.index] < sliders.headsProb)
    students.byHeads.forEach(group => {
      group.pos = [group.key == 'true' ? c.width/4 -15 : c.width/4*3 +15, c.height/2]

      group.forEach((d, i) => {
        d.pos.heads = addVec(phyllotaxis(i, 12), group.pos)
        d.group.heads = group
      })
    })
  }

  students.plagerizedGroup = d3.nestBy(_.sortBy(students.all, d => d.plagerized), d => d.plagerized)
  students.plagerizedGroup.forEach((group, groupIndex) => {
    var d0 = group.d0 = group[0]
    var offset = -20
    group.pos = [(d0.plagerized ? c.width/2 + offset : c.width/2 - offset), c.height/2 - 80]


    var getOrderedPositions = function() {
      positions = []

      var step = 25
      var top = 0
      var bottom = 0
      var right = 0

      var addAbove = function(dirPositive=true) {
        var y = (top + 1) * step
        var x = 0
        while (x <= right * step) {
          positions.push([dirPositive ? x: (right * step - x), y])
          x += step
        }
        top++
      }

      var addRight = function(dirPositive=true) {
        var x = (right + 1) * step
        var y = bottom * step 
        while (y <= top * step) {
          positions.push([x, dirPositive ? y: -y])
          y += step
        }
        right++
      }

      var addBelow = function(dirPositive=true) {
        var y = (bottom - 1) * step
        var x = 0
        while (x <= right * step) {
          positions.push([dirPositive ? x: (right * step - x), y])
          x += step
        }
        bottom--
      }

      var addForward = function() {
        addAbove(true)
        addRight(false)
        addBelow(false)
      }

      var addBackward = function() {
        addBelow(true)
        addRight(true)
        addAbove(false)
      }
      
      isForward = true
      while(positions.length < students.all.length) {
        if (positions.length === 0) {
          positions.push([0, 0])
          addRight()
          addBelow()
        } else {
          if (isForward) {
            addForward()
          } else {
            addBackward()
          }
          isForward = !isForward
        }
      }
      return positions
    }

    var populationPositions = getOrderedPositions()
    var reversePositions = populationPositions.map(pos => [-pos[0], pos[1]])
    
    group.forEach((d, i) => {
      var x = (i % 7)/20*c.width
      var y = ~~(i/7)/20*c.width
      // d.pos.plagerized = addVec([x, y], group.pos)
      d.pos.plagerizedShifted = addVec([x, y - 50], group.pos)
      d.group.plagerized = group

      d.pos.plagerizedShifted = addVec((groupIndex === 0) ? populationPositions[i]: reversePositions[i], group.pos)
    })
  })

  
  students.rand = rand
  return students
}

if (window.init) window.init()