#!/usr/bin/env bash

declare -A _LOADED_COMMANDS=() # Unused for now
readonly _COMMAND_NAMESPACE="cmd"
readonly _COMMAND_AUTO_LOAD_HOOK="on_load"

function command::namespace      { echo "${_COMMAND_NAMESPACE}"; }
function command::fn             { echo "$(command::namespace)::$(command::to_namespace "$1")::${2}"; }
function command::loaded()       { [[ -n "${_LOADED_COMMANDS["$1"]:-}" ]]; }
function command::has_function() { declare -F "$(command::fn "$1" "$2")" >/dev/null 2>&1; }
function command::is_auto_load() { declare -F "$(command::fn "$1" on_load)" >/dev/null 2>&1; }
function command::to_namespace() { echo "${1//\//::}"; }
function command::exists()       { command::has_function "$1" run; }
function command::run() {
  local cmd="$1"
  shift

  hook::run "$cmd" pre

  core::call_function "$(command::fn "$cmd" run)" "$@"

  local exit_code=$?
  if [[ $exit_code -eq 0 ]]; then
    hook::run "$cmd" post
  fi

  return $exit_code
}