local M = {}

function M.define(state, name, fn)
  state.commands[name] = fn
end

function M.bind(state, key, command_name)
  state.keymap[key] = command_name
end

function M.call(state, name, ...)
  local fn = state.commands[name]
  if not fn then
    return false, "Unknown command: " .. tostring(name)
  end

  local ok, err = pcall(fn, ...)
  if not ok then
    return false, tostring(err)
  end

  return true
end

function M.bind_fn(state, key, fn)
  if type(key) ~= "string" or key == "" then
    return false, "key must be a non-empty string"
  end
  if type(fn) ~= "function" then
    return false, "bind_fn requires a function"
  end

  local name = string.format("anon:%d", state.next_anon_command_id)
  state.next_anon_command_id = state.next_anon_command_id + 1

  state.commands[name] = fn
  state.keymap[key] = name
  return true
end

return M