-- use the neovim healthcheck module to integrate into :checkhealth.
-- check the system for dependencies, that:
-- * i like to use with neovim.
-- * plugins need.

local executable = require 'std.executable'

local programs_to_check = {}

local function check_program(name, name_of_executable)
	local display_name = name and (name .. '(' .. name_of_executable .. ')') or name_of_executable
	vim.health.start(display_name .. ' report')
	if executable(name_of_executable) then
		vim.health.ok(display_name .. ' found on system')
	else
		vim.health.error(display_name .. ' is not installed on the system')
	end
end

local function add_dependency(program)
	vim.validate('program', program, 'table')
	vim.validate('name_of_executable', program.name_of_executable, 'string')

	programs_to_check[program.name_of_executable] = program

	return add_dependency
end

local function check()
	vim.iter(programs_to_check)
			:each(function(_, program)
				check_program(program.name, program.name_of_executable)
			end)
end

return {
	add_dependency = add_dependency,
	check = check,
}