Config = {}

--- Return initial data for Config
--- @within Config
function Config.initial_data()
  return {
    screen = {
      width = 240,
      height = 136
    },
    colors = {
      black = 2,
      light_grey = 13,
      dark_grey = 14,
      red = 0,
      green = 7,
      blue = 9,
      white = 12,
      item = 12,
      meter_bg = 12
    },
    timing = {
      splash_duration = 120
    }
  }
end

--- Restores default configuration settings.
--- @within Config
function Config.reset()
  local initial = Config.initial_data()
  Config.screen = initial.screen
  Config.colors = initial.colors
  Config.timing = initial.timing
end

local CONFIG_SAVE_BANK = 7
local CONFIG_MAGIC_VALUE_ADDRESS = 2
local CONFIG_SPLASH_DURATION_ADDRESS = 3
local CONFIG_MAGIC_VALUE = 0xDE

--- Saves the current configuration.
--- @within Config
function Config.save()
  mset(CONFIG_MAGIC_VALUE, CONFIG_MAGIC_VALUE_ADDRESS, CONFIG_SAVE_BANK)
  mset(Config.timing.splash_duration, CONFIG_SPLASH_DURATION_ADDRESS, CONFIG_SAVE_BANK)
end

--- Loads saved configuration.
--- @within Config
function Config.load()
  if mget(CONFIG_MAGIC_VALUE_ADDRESS, CONFIG_SAVE_BANK) == CONFIG_MAGIC_VALUE then
    Config.timing.splash_duration = mget(CONFIG_SPLASH_DURATION_ADDRESS, CONFIG_SAVE_BANK)
  else
    Config.reset()
  end
end

Config.load()