#!/bin/bash
# Because why not? curl must be installed

readonly BROWSER="google-chrome"

# Create a random imgur url that may or may not be valid
imgururl() {
  # 1/3 chance for length of 5, 6 or 7 length string
  STRLN=$((5 + RANDOM % 3))
  local ID
  # don't nag about useless cat, this is more readable
  # shellcheck disable=2002
  ID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w ${STRLN} | head -n 1)
  echo "http://i.imgur.com/${ID}.jpg"
}

# Test if we found a valid URL
testimgur() {
  local URL=${1}
  local RESULT
  RESULT=$(curl -s -o /dev/null -I -w "%{http_code}" "${URL}")
  if [[ ${RESULT} == "200" ]]; then
    echo true
  else
    echo false
  fi
}

main() {
  local FAIL=0
  while true; do
    local URL
    URL=$(imgururl)
    if [[ $(testimgur "${URL}") == "true" ]]; then
      echo "Found ${URL} after ${FAIL} failed tries"
      ${BROWSER} "${URL}" > /dev/null 2>&1
      local FAIL=0
    else
      ((FAIL++))
    fi
  done
}

main