#let request = json(bytes(sys.inputs.at("request")))

#import "@preview/charged-ieee:0.1.4": ieee


#let parse-rfc3339-datetime(rfc3339-string) = {
  // Split into date and time+offset
  let (date-part, time-and-offset-part) = rfc3339-string.split("T")

  // Parse date
  let (year, month, day) = date-part.split("-").map(int)

  // Handle UTC "Z" or offset (+/-hh:mm)
  let time-part = time-and-offset-part
  let offset = none

  if time-part.ends-with("Z") {
    time-part = time-part.slice(0, time-part.len() - 1)
    offset = (0, 0) // UTC
  } else if time-part.contains("+") {
    let parts = time-part.split("+")
    time-part = parts.first()
    offset = parts.last().split(":").map(int)
    offset = (offset.at(0), offset.at(1)) // (+hh, +mm)
  } else if time-part.contains("-") {
    let idx = time-part.rfind("-")
    time-part = time-part.slice(0, idx)
    let offstr = time-part.slice(idx+1)
    offset = offstr.split(":").map(int)
    offset = (-offset.at(0), -offset.at(1)) // (-hh, -mm)
  }

  // Split time, possibly with fractional seconds
  let time-parts = time-part.split(":")
  let hour = int(time-parts.at(0))
  let minute = int(time-parts.at(1))

  let second = 0
  if time-parts.len() > 2 {
    if time-parts.at(2).contains(".") {
      let sec-parts = time-parts.at(2).split(".")
      second = int(sec-parts.first())
      // Fractions are ignored, but you could round if needed
    } else {
      second = int(time-parts.at(2))
    }
  }

  return datetime(
    year: year,
    month: month,
    day: day,
    hour: hour,
    minute: minute,
    second: second,
  )
}

#let currentDateTime = parse-rfc3339-datetime(request.timestamp)

#let ua = request.headers.at("user-agent", default: "")

#let browser = if ua.contains("Firefox") {
    "Firefox"
  } else if ua.contains("Edg/") {
    "Edge"
  } else if ua.contains("Chrome/") {
    "Chrome"
  } else if ua.contains("Safari/6") or ua.contains("Safari/7") {
    "Safari"
  } else {
    "Unknown"
  }

#let platform = if ua.contains("Win64") {
  "Windows"
} else if ua.contains("Android") {
  "Android"
} else if ua.contains("iPhone OS") {
  "iPhone"
} else {
  "Unknown"
}

#let styling(it) = {
  show link: this => {
    underline(text(this, fill: rgb("#5555ff")))
  }
  it
}