import parsecfg, os, tables, strutils

type Profile = tuple[path: string, name: string]

let file = "~/.mozilla/firefox/profiles.ini".expandTilde()
var dict = loadConfig(file)

var profiles: seq[Profile]

let installs = {
  "release": "4F96D1932A9F858E",
  "dev": "46F492E0ACFF84D4"
}.toTable

let defaultInstall = "dev"

for section in dict.sections():
  if section.startsWith("Profile"):
    let name = dict.getSectionValue(section, "Name")
    let path = dict.getSectionValue(section, "Path")
    profiles.add((path, name))

proc current(): Profile =
  let key = dict.getSectionValue("Install" & installs[defaultInstall], "Default")
  for profile in profiles:
    if profile.path == key:
      return profile

proc next(): Profile =
  let current = current()
  let index = profiles.find(current)
  result = profiles[(index + 1) mod profiles.len]

proc setNext() =
  let next = next()
  dict.setSectionKey("Install" & installs[defaultInstall], "Default", next.path)
  dict.writeConfig(file)

if paramCount() > 0 and paramStr(1) == "-c":
  echo "{\"class\":\"" & current().name & "\"}"
else:
  setNext()