/*
 * GDevelop JS Platform
 * Copyright 2013-2016 Florian Rival (Florian.Rival@gmail.com). All rights reserved.
 * This project is released under the MIT License.
 */

/**
 * @memberof gdjs.evtTools
 * @class common
 * @static
 * @private
 */
gdjs.evtTools.common = gdjs.evtTools.common || {};

/**
 * Get the value of a variable. Equivalent of variable.getAsNumber().
 * @private
 */
gdjs.evtTools.common.getVariableNumber = function(variable) {
  return variable.getAsNumber();
};

/**
 * Get the string of a variable. Equivalent of variable.getAsString().
 * @private
 */
gdjs.evtTools.common.getVariableString = function(variable) {
  return variable.getAsString();
};

/**
 * @private
 */
gdjs.evtTools.common.sceneVariableExists = function(
  runtimeScene,
  variableName
) {
  return runtimeScene.getVariables().has(variableName);
};

/**
 * @private
 */
gdjs.evtTools.common.globalVariableExists = function(
  runtimeScene,
  variableName
) {
  return runtimeScene
    .getGame()
    .getVariables()
    .has(variableName);
};

/**
 * @private
 */
gdjs.evtTools.common.variableChildExists = function(variable, childName) {
  return variable.hasChild(childName);
};

/**
 * @private
 */
gdjs.evtTools.common.variableRemoveChild = function(variable, childName) {
  return variable.removeChild(childName);
};

/**
 * @private
 */
gdjs.evtTools.common.variableClearChildren = function(variable) {
  variable.clearChildren();
};

/**
 * @private
 */
gdjs.evtTools.common.getVariableChildCount = function(variable) {
  if (variable.isStructure() == false) return 0;
  return Object.keys(variable.getAllChildren()).length;
};

/**
 * Convert a string to a float.
 * @private
 */
gdjs.evtTools.common.toNumber = function(str) {
  return parseFloat(str);
};

/**
 * Convert a number to a string.
 * @private
 */
gdjs.evtTools.common.toString = function(num) {
  //Using String literal is fastest than using toString according to
  //http://jsperf.com/number-to-string/2 and http://jsben.ch/#/ghQYR
  return '' + num;
};

/**
 * Negate the boolean.
 * @private
 */
gdjs.evtTools.common.logicalNegation = function(bool) {
  return !bool;
};

gdjs.evtTools.common.clamp = function(x, min, max) {
  return Math.min(Math.max(x, min), max);
};

gdjs.evtTools.common.acosh = function(arg) {
  // http://kevin.vanzonneveld.net
  // +   original by: Onno Marsman
  return Math.log(arg + Math.sqrt(arg * arg - 1));
};

gdjs.evtTools.common.asinh = function(arg) {
  // http://kevin.vanzonneveld.net
  // +   original by: Onno Marsman
  return Math.log(arg + Math.sqrt(arg * arg + 1));
};

gdjs.evtTools.common.atanh = function(arg) {
  // http://kevin.vanzonneveld.net
  // +   original by: Onno Marsman
  return 0.5 * Math.log((1 + arg) / (1 - arg));
};

gdjs.evtTools.common.cosh = function(arg) {
  return (Math.exp(arg) + Math.exp(-arg)) / 2;
};

gdjs.evtTools.common.sinh = function(arg) {
  return (Math.exp(arg) - Math.exp(-arg)) / 2;
};

gdjs.evtTools.common.tanh = function(arg) {
  return (Math.exp(arg) - Math.exp(-arg)) / (Math.exp(arg) + Math.exp(-arg));
};

gdjs.evtTools.common.cot = function(arg) {
  return 1 / Math.tan(arg);
};

gdjs.evtTools.common.csc = function(arg) {
  return 1 / Math.sin(arg);
};

gdjs.evtTools.common.sec = function(arg) {
  return 1 / Math.cos(arg);
};

gdjs.evtTools.common.log10 = function(arg) {
  return Math.log(arg) / Math.LN10;
};

gdjs.evtTools.common.log2 = function(arg) {
  return Math.log(arg) / Math.LN2;
};

gdjs.evtTools.common.sign = function(arg) {
  if (arg === 0) return 0;

  return arg > 0 ? +1 : -1;
};

gdjs.evtTools.common.cbrt = function(x) {
  return Math.pow(x, 1 / 3);
};

gdjs.evtTools.common.nthroot = function(x, n) {
  return Math.pow(x, 1 / n);
};

gdjs.evtTools.common.mod = function(x, y) {
  return x - y * Math.floor(x / y);
};

gdjs.evtTools.common.angleDifference = function(angle1, angle2) {
  return (
    gdjs.evtTools.common.mod(
      gdjs.evtTools.common.mod(angle1 - angle2, 360.0) + 180.0,
      360.0
    ) - 180.0
  );
};

gdjs.evtTools.common.lerp = function(a, b, x) {
  return a + (b - a) * x;
};

gdjs.evtTools.common.trunc = function(x) {
  return x | 0;
};