#!/usr/bin/env node

var d3 = require("d3");

var hour = 36e5,
    date0 = new Date(2016, 5, 1),
    date1 = d3.timeMonth.offset(date0, 7),
    timeFormat = d3.timeFormat("%Y-%m-%dT%H:%M:%S.%L"),
    data = d3.timeDays(date0, date1).map(fakeDatum(22 * hour, 8 * hour, 0.5 * hour));

process.stdout.write(d3.csvFormat(data) + "\n");

function fakeDatum(offset, duration, deviation) {
  var random = d3.randomNormal(0, deviation);
  return function(date) {
    return {
      asleep: timeFormat(new Date(+date + random() + offset)),
      awake: timeFormat(new Date(+date + random() + offset + duration))
    };
  };
}