var fs = require('fs')
var path = require('path')
var pull = require('pull-stream')
var File = require('pull-file')
var Split = require('pull-split')
var common = require('./common')

var start = common.startTime
var startDay = Math.floor(start / 86400000)
var startWeek = Math.floor(start / 86400000 / 7)
var startMonth = Math.floor(start / 86400000 / 30.43666666666666666666)
var startT

var now = Date.now()
var nowDay = Math.floor(now / 86400000)
var nowWeek = Math.floor(now / 86400000 / 7)
var nowMonth = Math.floor(now / 86400000 / 30.43666666666666666666)

var series = process.argv[2]
if (!series) throw new TypeError('Missing series argument')
var unit = 1

if (series === 'day') {
  startT = startDay
  unit = 86400e3
} else if (series === 'week') {
  startT = startWeek
  unit = 86400e3*7
} else if (series === 'month') {
  startT = startMonth
  unit = 86400e3*(365.24/12)
} else {
  throw new TypeError('Invalid series')
}

var info = JSON.parse(fs.readFileSync(path.join(__dirname, series + '.json')))
var info1 = JSON.parse(fs.readFileSync(path.join(__dirname, 'ids-colors.json')))
var ids = info1.ids
var userColors = info1.colors

var height = info.max

var last = Date.now() - 86400e3

function toDateString(ms) {
  var d
  if (series === 'month') {
    // Pick a date in the middle of the month, to correct for variations in
    // month length.
    ms += 3*86400e3
    d = new Date(ms)
    return d.toISOString().replace(/-..T.*/, '')
  } else {
    d = new Date(ms)
    return d.toISOString().replace(/T.*/, '')
  }
}

var max = 0
var maxTs

pull(
  File(path.join(__dirname, series + '.jsonp')),
  Split(),
  pull.filter(Boolean),
  pull.map(JSON.parse),
  pull.drain(function (interval) {
    var ms = interval.time * unit
    if (ms > last) return
    var count = interval.ids.length
    if (count > max) max = count, maxTs = ms
    console.log(toDateString(ms), count)
  }, function (err) {
    if (err) throw err
    console.log(toDateString(maxTs), max, 'max')
  })
)