text: "use strict";
  
  var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
  
  Object.defineProperty(exports, "__esModule", {
    value: true
  });
  exports.createFunctionNode = void 0;
  
  var _typeof2 = _interopRequireDefault(require("@babel/runtime/helpers/typeof"));
  
  var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));
  
  var _is = require("../../utils/is.js");
  
  var _string = require("../../utils/string.js");
  
  var _object = require("../../utils/object.js");
  
  var _customs = require("../../utils/customs.js");
  
  var _scope = require("../../utils/scope.js");
  
  var _factory = require("../../utils/factory.js");
  
  var _latex = require("../../utils/latex.js");
  
  var name = 'FunctionNode';
  var dependencies = ['math', 'Node', 'SymbolNode'];
  var createFunctionNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, function (_ref) {
    var math = _ref.math,
        Node = _ref.Node,
        SymbolNode = _ref.SymbolNode;
  
    /**
     * @constructor FunctionNode
     * @extends {./Node}
     * invoke a list with arguments on a node
     * @param {./Node | string} fn Node resolving with a function on which to invoke
     *                             the arguments, typically a SymboNode or AccessorNode
     * @param {./Node[]} args
     */
    function FunctionNode(fn, args) {
      if (!(this instanceof FunctionNode)) {
        throw new SyntaxError('Constructor must be called with the new operator');
      }
  
      if (typeof fn === 'string') {
        fn = new SymbolNode(fn);
      } // validate input
  
  
      if (!(0, _is.isNode)(fn)) throw new TypeError('Node expected as parameter "fn"');
  
      if (!Array.isArray(args) || !args.every(_is.isNode)) {
        throw new TypeError('Array containing Nodes expected for parameter "args"');
      }
  
      this.fn = fn;
      this.args = args || []; // readonly property name
  
      Object.defineProperty(this, 'name', {
        get: function () {
          return this.fn.name || '';
        }.bind(this),
        set: function set() {
          throw new Error('Cannot assign a new name, name is read-only');
        }
      });
    }
  
    FunctionNode.prototype = new Node();
    FunctionNode.prototype.type = 'FunctionNode';
    FunctionNode.prototype.isFunctionNode = true;
    /**
     * Compile a node into a JavaScript function.
     * This basically pre-calculates as much as possible and only leaves open
     * calculations which depend on a dynamic scope with variables.
     * @param {Object} math     Math.js namespace with functions and constants.
     * @param {Object} argNames An object with argument names as key and `true`
     *                          as value. Used in the SymbolNode to optimize
     *                          for arguments from user assigned functions
     *                          (see FunctionAssignmentNode) or special symbols
     *                          like `end` (see IndexNode).
     * @return {function} Returns a function which can be called like:
     *                        evalNode(scope: Object, args: Object, context: *)
     */
  
    FunctionNode.prototype._compile = function (math, argNames) {
      if (!(this instanceof FunctionNode)) {
        throw new TypeError('No valid FunctionNode');
      } // compile arguments
  
  
      var evalArgs = this.args.map(function (arg) {
        return arg._compile(math, argNames);
      });
  
      if ((0, _is.isSymbolNode)(this.fn)) {
        // we can statically determine whether the function has an rawArgs property
        var _name = this.fn.name;
        var fn = _name in math ? (0, _customs.getSafeProperty)(math, _name) : undefined;
        var isRaw = typeof fn === 'function' && fn.rawArgs === true;
  
        var resolveFn = function resolveFn(scope) {
          if (scope.has(_name)) {
            return scope.get(_name);
          }
  
          if (_name in math) {
            return (0, _customs.getSafeProperty)(math, _name);
          }
  
          return FunctionNode.onUndefinedFunction(_name);
        };
  
        if (isRaw) {
          // pass unevaluated parameters (nodes) to the function
          // "raw" evaluation
          var rawArgs = this.args;
          return function evalFunctionNode(scope, args, context) {
            var fn = resolveFn(scope);
            return fn(rawArgs, math, (0, _scope.createSubScope)(scope, args), scope);
          };
        } else {
          // "regular" evaluation
          switch (evalArgs.length) {
            case 0:
              return function evalFunctionNode(scope, args, context) {
                var fn = resolveFn(scope);
                return fn();
              };
  
            case 1:
              return function evalFunctionNode(scope, args, context) {
                var fn = resolveFn(scope);
                var evalArg0 = evalArgs[0];
                return fn(evalArg0(scope, args, context));
              };
  
            case 2:
              return function evalFunctionNode(scope, args, context) {
                var fn = resolveFn(scope);
                var evalArg0 = evalArgs[0];
                var evalArg1 = evalArgs[1];
                return fn(evalArg0(scope, args, context), evalArg1(scope, args, context));
              };
  
            default:
              return function evalFunctionNode(scope, args, context) {
                var fn = resolveFn(scope);
                var values = evalArgs.map(function (evalArg) {
                  return evalArg(scope, args, context);
                });
                return fn.apply(void 0, (0, _toConsumableArray2["default"])(values));
              };
          }
        }
      } else if ((0, _is.isAccessorNode)(this.fn) && (0, _is.isIndexNode)(this.fn.index) && this.fn.index.isObjectProperty()) {
        // execute the function with the right context: the object of the AccessorNode
        var evalObject = this.fn.object._compile(math, argNames);
  
        var prop = this.fn.index.getObjectProperty();
        var _rawArgs = this.args;
        return function evalFunctionNode(scope, args, context) {
          var object = evalObject(scope, args, context);
          (0, _customs.validateSafeMethod)(object, prop);
          var isRaw = object[prop] && object[prop].rawArgs;
  
          if (isRaw) {
            return object[prop](_rawArgs, math, (0, _scope.createSubScope)(scope, args), scope); // "raw" evaluation
          } else {
            // "regular" evaluation
            var values = evalArgs.map(function (evalArg) {
              return evalArg(scope, args, context);
            });
            return object[prop].apply(object, values);
          }
        };
      } else {
        // node.fn.isAccessorNode && !node.fn.index.isObjectProperty()
        // we have to dynamically determine whether the function has a rawArgs property
        var evalFn = this.fn._compile(math, argNames);
  
        var _rawArgs2 = this.args;
        return function evalFunctionNode(scope, args, context) {
          var fn = evalFn(scope, args, context);
          var isRaw = fn && fn.rawArgs;
  
          if (isRaw) {
            return fn(_rawArgs2, math, (0, _scope.createSubScope)(scope, args), scope); // "raw" evaluation
          } else {
            // "regular" evaluation
            var values = evalArgs.map(function (evalArg) {
              return evalArg(scope, args, context);
            });
            return fn.apply(fn, values);
          }
        };
      }
    };
    /**
     * Execute a callback for each of the child nodes of this node
     * @param {function(child: Node, path: string, parent: Node)} callback
     */
  
  
    FunctionNode.prototype.forEach = function (callback) {
      callback(this.fn, 'fn', this);
  
      for (var i = 0; i < this.args.length; i++) {
        callback(this.args[i], 'args[' + i + ']', this);
      }
    };
    /**
     * Create a new FunctionNode having it's childs be the results of calling
     * the provided callback function for each of the childs of the original node.
     * @param {function(child: Node, path: string, parent: Node): Node} callback
     * @returns {FunctionNode} Returns a transformed copy of the node
     */
  
  
    FunctionNode.prototype.map = function (callback) {
      var fn = this._ifNode(callback(this.fn, 'fn', this));
  
      var args = [];
  
      for (var i = 0; i < this.args.length; i++) {
        args[i] = this._ifNode(callback(this.args[i], 'args[' + i + ']', this));
      }
  
      return new FunctionNode(fn, args);
    };
    /**
     * Create a clone of this node, a shallow copy
     * @return {FunctionNode}
     */
  
  
    FunctionNode.prototype.clone = function () {
      return new FunctionNode(this.fn, this.args.slice(0));
    };
    /**
     * Throws an error 'Undefined function {name}'
     * @param {string} name
     */
  
  
    FunctionNode.onUndefinedFunction = function (name) {
      throw new Error('Undefined function ' + name);
    }; // backup Node's toString function
    // @private
  
  
    var nodeToString = FunctionNode.prototype.toString;
    /**
     * Get string representation. (wrapper function)
     * This overrides parts of Node's toString function.
     * If callback is an object containing callbacks, it
     * calls the correct callback for the current node,
     * otherwise it falls back to calling Node's toString
     * function.
     *
     * @param {Object} options
     * @return {string} str
     * @override
     */
  
    FunctionNode.prototype.toString = function (options) {
      var customString;
      var name = this.fn.toString(options);
  
      if (options && (0, _typeof2["default"])(options.handler) === 'object' && (0, _object.hasOwnProperty)(options.handler, name)) {
        // callback is a map of callback functions
        customString = options.handler[name](this, options);
      }
  
      if (typeof customString !== 'undefined') {
        return customString;
      } // fall back to Node's toString
  
  
      return nodeToString.call(this, options);
    };
    /**
     * Get string representation
     * @param {Object} options
     * @return {string} str
     */
  
  
    FunctionNode.prototype._toString = function (options) {
      var args = this.args.map(function (arg) {
        return arg.toString(options);
      });
      var fn = (0, _is.isFunctionAssignmentNode)(this.fn) ? '(' + this.fn.toString(options) + ')' : this.fn.toString(options); // format the arguments like "add(2, 4.2)"
  
      return fn + '(' + args.join(', ') + ')';
    };
    /**
     * Get a JSON representation of the node
     * @returns {Object}
     */
  
  
    FunctionNode.prototype.toJSON = function () {
      return {
        mathjs: 'FunctionNode',
        fn: this.fn,
        args: this.args
      };
    };
    /**
     * Instantiate an AssignmentNode from its JSON representation
     * @param {Object} json  An object structured like
     *                       `{"mathjs": "FunctionNode", fn: ..., args: ...}`,
     *                       where mathjs is optional
     * @returns {FunctionNode}
     */
  
  
    FunctionNode.fromJSON = function (json) {
      return new FunctionNode(json.fn, json.args);
    };
    /**
     * Get HTML representation
     * @param {Object} options
     * @return {string} str
     */
  
  
    FunctionNode.prototype.toHTML = function (options) {
      var args = this.args.map(function (arg) {
        return arg.toHTML(options);
      }); // format the arguments like "add(2, 4.2)"
  
      return '<span class="math-function">' + (0, _string.escape)(this.fn) + '</span><span class="math-paranthesis math-round-parenthesis">(</span>' + args.join('<span class="math-separator">,</span>') + '<span class="math-paranthesis math-round-parenthesis">)</span>';
    };
    /*
     * Expand a LaTeX template
     *
     * @param {string} template
     * @param {Node} node
     * @param {Object} options
     * @private
     **/
  
  
    function expandTemplate(template, node, options) {
      var latex = ''; // Match everything of the form ${identifier} or ${identifier[2]} or $$
      // while submatching identifier and 2 (in the second case)
  
      var regex = /\$(?:\{([a-z_][a-z_0-9]*)(?:\[([0-9]+)\])?\}|\$)/gi;
      var inputPos = 0; // position in the input string
  
      var match;
  
      while ((match = regex.exec(template)) !== null) {
        // go through all matches
        // add everything in front of the match to the LaTeX string
        latex += template.substring(inputPos, match.index);
        inputPos = match.index;
  
        if (match[0] === '$$') {
          // escaped dollar sign
          latex += '$';
          inputPos++;
        } else {
          // template parameter
          inputPos += match[0].length;
          var property = node[match[1]];
  
          if (!property) {
            throw new ReferenceError('Template: Property ' + match[1] + ' does not exist.');
          }
  
          if (match[2] === undefined) {
            // no square brackets
            switch ((0, _typeof2["default"])(property)) {
              case 'string':
                latex += property;
                break;
  
              case 'object':
                if ((0, _is.isNode)(property)) {
                  latex += property.toTex(options);
                } else if (Array.isArray(property)) {
                  // make array of Nodes into comma separated list
                  latex += property.map(function (arg, index) {
                    if ((0, _is.isNode)(arg)) {
                      return arg.toTex(options);
                    }
  
                    throw new TypeError('Template: ' + match[1] + '[' + index + '] is not a Node.');
                  }).join(',');
                } else {
                  throw new TypeError('Template: ' + match[1] + ' has to be a Node, String or array of Nodes');
                }
  
                break;
  
              default:
                throw new TypeError('Template: ' + match[1] + ' has to be a Node, String or array of Nodes');
            }
          } else {
            // with square brackets
            if ((0, _is.isNode)(property[match[2]] && property[match[2]])) {
              latex += property[match[2]].toTex(options);
            } else {
              throw new TypeError('Template: ' + match[1] + '[' + match[2] + '] is not a Node.');
            }
          }
        }
      }
  
      latex += template.slice(inputPos); // append rest of the template
  
      return latex;
    } // backup Node's toTex function
    // @private
  
  
    var nodeToTex = FunctionNode.prototype.toTex;
    /**
     * Get LaTeX representation. (wrapper function)
     * This overrides parts of Node's toTex function.
     * If callback is an object containing callbacks, it
     * calls the correct callback for the current node,
     * otherwise it falls back to calling Node's toTex
     * function.
     *
     * @param {Object} options
     * @return {string}
     */
  
    FunctionNode.prototype.toTex = function (options) {
      var customTex;
  
      if (options && (0, _typeof2["default"])(options.handler) === 'object' && (0, _object.hasOwnProperty)(options.handler, this.name)) {
        // callback is a map of callback functions
        customTex = options.handler[this.name](this, options);
      }
  
      if (typeof customTex !== 'undefined') {
        return customTex;
      } // fall back to Node's toTex
  
  
      return nodeToTex.call(this, options);
    };
    /**
     * Get LaTeX representation
     * @param {Object} options
     * @return {string} str
     */
  
  
    FunctionNode.prototype._toTex = function (options) {
      var args = this.args.map(function (arg) {
        // get LaTeX of the arguments
        return arg.toTex(options);
      });
      var latexConverter;
  
      if (_latex.latexFunctions[this.name]) {
        latexConverter = _latex.latexFunctions[this.name];
      } // toTex property on the function itself
  
  
      if (math[this.name] && (typeof math[this.name].toTex === 'function' || (0, _typeof2["default"])(math[this.name].toTex) === 'object' || typeof math[this.name].toTex === 'string')) {
        // .toTex is a callback function
        latexConverter = math[this.name].toTex;
      }
  
      var customToTex;
  
      switch ((0, _typeof2["default"])(latexConverter)) {
        case 'function':
          // a callback function
          customToTex = latexConverter(this, options);
          break;
  
        case 'string':
          // a template string
          customToTex = expandTemplate(latexConverter, this, options);
          break;
  
        case 'object':
          // an object with different "converters" for different numbers of arguments
          switch ((0, _typeof2["default"])(latexConverter[args.length])) {
            case 'function':
              customToTex = latexConverter[args.length](this, options);
              break;
  
            case 'string':
              customToTex = expandTemplate(latexConverter[args.length], this, options);
              break;
          }
  
      }
  
      if (typeof customToTex !== 'undefined') {
        return customToTex;
      }
  
      return expandTemplate(_latex.defaultTemplate, this, options);
    };
    /**
     * Get identifier.
     * @return {string}
     */
  
  
    FunctionNode.prototype.getIdentifier = function () {
      return this.type + ':' + this.name;
    };
  
    return FunctionNode;
  }, {
    isClass: true,
    isNode: true
  });
  exports.createFunctionNode = createFunctionNode;