-- Sporel Launcher — pure-Lua finite state machine.
-- No engine.* calls; testable directly by lib-management.launcher-test.

local M = {}

M.STATE_LIST         = "list"
M.STATE_QUIT_CONFIRM = "quit_confirm"
M.EXIT               = "exit"  -- sentinel: caller should engine.exit(0)

-- Events: "esc", "enter", "click_yes", "click_no", "click_module"
function M.next(state, event)
    if state == M.STATE_LIST then
        if event == "esc" then return M.STATE_QUIT_CONFIRM end
        return M.STATE_LIST
    elseif state == M.STATE_QUIT_CONFIRM then
        if event == "esc"       then return M.STATE_LIST end
        if event == "enter"     then return M.EXIT end
        if event == "click_yes" then return M.EXIT end
        if event == "click_no"  then return M.STATE_LIST end
        return M.STATE_QUIT_CONFIRM
    end
    return state
end

return M