local json = require("cjson.safe")

local conf = {}

local function load_conf(prefix)
  local name_suffix = "/global.json"
  local file = assert(io.open(prefix .. name_suffix, "r"), "File " .. prefix .. name_suffix .. " not found")
  conf = json.decode(file:read("*all"))
  file:close()
  assert(conf["auth"], "Simple-SSO configuration is missing an `auth` entry")
  assert(conf["sso_host"], "Simple-SSO configuration is missing a `sso_host` entry")
  assert(conf["sso_prefix"], "Simple-SSO configuration is missing a `sso_prefix` entry")
  assert(conf["session_seconds"], "Simple-SSO configuration is missing a `session_seconds` entry")
end

local function get_auth_commands()
  return conf["auth"]
end

local function get_sso_host()
  return conf["sso_host"]
end

local function get_sso_prefix()
  return conf["sso_prefix"]
end

local function get_session_seconds()
  return conf["session_seconds"]
end

return {
  get_auth_commands = get_auth_commands,
  get_session_seconds = get_session_seconds,
  get_sso_host = get_sso_host,
  get_sso_prefix = get_sso_prefix,
  load_conf = load_conf,
}