var register = require("./lib/register");
var addHook = require("./lib/add");
var removeHook = require("./lib/remove");

// bind with array of arguments: https://stackoverflow.com/a/21792913
var bind = Function.bind;
var bindable = bind.bind(bind);

function bindApi(hook, state, name) {
  var removeHookRef = bindable(removeHook, null).apply(
    null,
    name ? [state, name] : [state]
  );
  hook.api = { remove: removeHookRef };
  hook.remove = removeHookRef;
  ["before", "error", "after", "wrap"].forEach(function (kind) {
    var args = name ? [state, kind, name] : [state, kind];
    hook[kind] = hook.api[kind] = bindable(addHook, null).apply(null, args);
  });
}

function HookSingular() {
  var singularHookName = "h";
  var singularHookState = {
    registry: {},
  };
  var singularHook = register.bind(null, singularHookState, singularHookName);
  bindApi(singularHook, singularHookState, singularHookName);
  return singularHook;
}

function HookCollection() {
  var state = {
    registry: {},
  };

  var hook = register.bind(null, state);
  bindApi(hook, state);

  return hook;
}

var collectionHookDeprecationMessageDisplayed = false;
function Hook() {
  if (!collectionHookDeprecationMessageDisplayed) {
    console.warn(
      '[before-after-hook]: "Hook()" repurposing warning, use "Hook.Collection()". Read more: https://git.io/upgrade-before-after-hook-to-1.4'
    );
    collectionHookDeprecationMessageDisplayed = true;
  }
  return HookCollection();
}

Hook.Singular = HookSingular.bind();
Hook.Collection = HookCollection.bind();

module.exports = Hook;
// expose constructors as a named property for TypeScript
module.exports.Hook = Hook;
module.exports.Singular = Hook.Singular;
module.exports.Collection = Hook.Collection;