--- @class libmodal.utils.Vars
--- @field private mode_name string the highlight group to use when printing `str`
--- @field private var_name string the highlight group to use when printing `str`
local Vars = require('libmodal/src/utils/classes').new()

--- @return string name the global Neovim setting
function Vars:name()
	return self.mode_name .. self.var_name
end

--- @return unknown `vim.g[self:name()])`
function Vars:get()
	return vim.g[self:name()]
end

--- @param val unknown set `vim.g[self:name()])` equal to this value
function Vars:set(val)
	vim.g[self:name()] = val
end

return
{
	--- Create a new set of variables
	--- @param var_name string the name of the key used to refer to this variable in `Vars`.
	--- @param mode_name string the name of the mode
	new = function(var_name, mode_name)
		local self = setmetatable({}, Vars)

		local function no_spaces(str_with_spaces, first_letter_modifier)
			local split_str = vim.split(string.gsub(str_with_spaces, vim.pesc '_', vim.pesc ' '), ' ')

			local function camel_case(str, func)
				return func(string.sub(str, 0, 1) or '') .. string.lower(string.sub(str, 2) or '')
			end

			split_str[1] = camel_case(split_str[1], first_letter_modifier)

			for i = 2, #split_str do split_str[i] =
				camel_case(split_str[i], string.upper)
			end

			return table.concat(split_str)
		end

		self.mode_name = no_spaces(mode_name, string.lower)

		self.var_name  = 'Mode' .. no_spaces(var_name, string.upper)

		return self
	end
}