/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Ajax.org Code Editor (ACE).
 *
 * The Initial Developer of the Original Code is
 * Ajax.org B.V.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *      Fabian Jakobs <fabian AT ajax DOT org>
 *      Colin Gourlay <colin DOT j DOT gourlay AT gmail DOT com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK *****
 *
 * TODO: python delimiters
 */

define(function(require, exports, module) {
"use strict";

var oop = require("../lib/oop");
var lang = require("../lib/lang");
var TextHighlightRules = require("./text_highlight_rules").TextHighlightRules;

var PythonHighlightRules = function() {

    var keywords = lang.arrayToMap(
        ("and|as|assert|break|class|continue|def|del|elif|else|except|exec|" +
        "finally|for|from|global|if|import|in|is|lambda|not|or|pass|print|" +
        "raise|return|try|while|with|yield").split("|")
    );

    var builtinConstants = lang.arrayToMap(
        ("True|False|None|NotImplemented|Ellipsis|__debug__").split("|")
    );

    var builtinFunctions = lang.arrayToMap(
        ("abs|divmod|input|open|staticmethod|all|enumerate|int|ord|str|any|" +
        "eval|isinstance|pow|sum|basestring|execfile|issubclass|print|super|" +
        "binfile|iter|property|tuple|bool|filter|len|range|type|bytearray|" +
        "float|list|raw_input|unichr|callable|format|locals|reduce|unicode|" +
        "chr|frozenset|long|reload|vars|classmethod|getattr|map|repr|xrange|" +
        "cmp|globals|max|reversed|zip|compile|hasattr|memoryview|round|" +
        "__import__|complex|hash|min|set|apply|delattr|help|next|setattr|" +
        "buffer|dict|hex|object|slice|coerce|dir|id|oct|sorted|intern").split("|")
    );

    var futureReserved = lang.arrayToMap(
        ("").split("|")
    );

    var strPre = "(?:r|u|ur|R|U|UR|Ur|uR)?";

    var decimalInteger = "(?:(?:[1-9]\\d*)|(?:0))";
    var octInteger = "(?:0[oO]?[0-7]+)";
    var hexInteger = "(?:0[xX][\\dA-Fa-f]+)";
    var binInteger = "(?:0[bB][01]+)";
    var integer = "(?:" + decimalInteger + "|" + octInteger + "|" + hexInteger + "|" + binInteger + ")";

    var exponent = "(?:[eE][+-]?\\d+)";
    var fraction = "(?:\\.\\d+)";
    var intPart = "(?:\\d+)";
    var pointFloat = "(?:(?:" + intPart + "?" + fraction + ")|(?:" + intPart + "\\.))";
    var exponentFloat = "(?:(?:" + pointFloat + "|" +  intPart + ")" + exponent + ")";
    var floatNumber = "(?:" + exponentFloat + "|" + pointFloat + ")";

    this.$rules = {
        "start" : [ {
            token : "comment",
            regex : "#.*$"
        }, {
            token : "string",           // """ string
            regex : strPre + '"{3}(?:[^\\\\]|\\\\.)*?"{3}'
        }, {
            token : "string",           // multi line """ string start
            merge : true,
            regex : strPre + '"{3}.*$',
            next : "qqstring"
        }, {
            token : "string",           // " string
            regex : strPre + '"(?:[^\\\\]|\\\\.)*?"'
        }, {
            token : "string",           // ''' string
            regex : strPre + "'{3}(?:[^\\\\]|\\\\.)*?'{3}"
        }, {
            token : "string",           // multi line ''' string start
            merge : true,
            regex : strPre + "'{3}.*$",
            next : "qstring"
        }, {
            token : "string",           // ' string
            regex : strPre + "'(?:[^\\\\]|\\\\.)*?'"
        }, {
            token : "constant.numeric", // imaginary
            regex : "(?:" + floatNumber + "|\\d+)[jJ]\\b"
        }, {
            token : "constant.numeric", // float
            regex : floatNumber
        }, {
            token : "constant.numeric", // long integer
            regex : integer + "[lL]\\b"
        }, {
            token : "constant.numeric", // integer
            regex : integer + "\\b"
        }, {
            token : function(value) {
                if (keywords.hasOwnProperty(value))
                    return "keyword";
                else if (builtinConstants.hasOwnProperty(value))
                    return "constant.language";
                else if (futureReserved.hasOwnProperty(value))
                    return "invalid.illegal";
                else if (builtinFunctions.hasOwnProperty(value))
                    return "support.function";
                else if (value == "debugger")
                    return "invalid.deprecated";
                else
                    return "identifier";
            },
            regex : "[a-zA-Z_$][a-zA-Z0-9_$]*\\b"
        }, {
            token : "keyword.operator",
            regex : "\\+|\\-|\\*|\\*\\*|\\/|\\/\\/|%|<<|>>|&|\\||\\^|~|<|>|<=|=>|==|!=|<>|="
        }, {
            token : "paren.lparen",
            regex : "[\\[\\(\\{]"
        }, {
            token : "paren.rparen",
            regex : "[\\]\\)\\}]"
        }, {
            token : "text",
            regex : "\\s+"
        } ],
        "qqstring" : [ {
            token : "string", // multi line """ string end
            regex : '(?:[^\\\\]|\\\\.)*?"{3}',
            next : "start"
        }, {
            token : "string",
            merge : true,
            regex : '.+'
        } ],
        "qstring" : [ {
            token : "string",  // multi line ''' string end
            regex : "(?:[^\\\\]|\\\\.)*?'{3}",
            next : "start"
        }, {
            token : "string",
            merge : true,
            regex : '.+'
        } ]
    };
};

oop.inherits(PythonHighlightRules, TextHighlightRules);

exports.PythonHighlightRules = PythonHighlightRules;
});