// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

(function (mod) {
    if (typeof exports == "object" && typeof module == "object") // CommonJS
        mod(require("../../lib/codemirror"), require("../../addon/mode/multiplex"));
    else if (typeof define == "function" && define.amd) // AMD
        define(["../../lib/codemirror", "../../addon/mode/multiplex"], mod);
    else // Plain browser env
        mod(CodeMirror);
})(function (CodeMirror) {
    "use strict";

    CodeMirror.defineMode("twig:inner", function () {
        var keywords = ["and", "as", "autoescape", "endautoescape", "block", "do", "endblock", "else", "elseif", "extends", "for", "endfor", "embed", "endembed", "filter", "endfilter", "flush", "from", "if", "endif", "in", "is", "include", "import", "not", "or", "set", "spaceless", "endspaceless", "with", "endwith", "trans", "endtrans", "blocktrans", "endblocktrans", "macro", "endmacro", "use", "verbatim", "endverbatim"],
            operator = /^[+\-*&%=<>!?|~^]/,
            sign = /^[:\[\(\{]/,
            atom = ["true", "false", "null", "empty", "defined", "divisibleby", "divisible by", "even", "odd", "iterable", "sameas", "same as"],
            number = /^(\d[+\-\*\/])?\d+(\.\d+)?/;

        keywords = new RegExp("((" + keywords.join(")|(") + "))\\b");
        atom = new RegExp("((" + atom.join(")|(") + "))\\b");

        function tokenBase(stream, state) {
            var ch = stream.peek();

            //Comment
            if (state.incomment) {
                if (!stream.skipTo("#}")) {
                    stream.skipToEnd();
                } else {
                    stream.eatWhile(/\#|}/);
                    state.incomment = false;
                }
                return "comment";
                //Tag
            } else if (state.intag) {
                //After operator
                if (state.operator) {
                    state.operator = false;
                    if (stream.match(atom)) {
                        return "atom";
                    }
                    if (stream.match(number)) {
                        return "number";
                    }
                }
                //After sign
                if (state.sign) {
                    state.sign = false;
                    if (stream.match(atom)) {
                        return "atom";
                    }
                    if (stream.match(number)) {
                        return "number";
                    }
                }

                if (state.instring) {
                    if (ch == state.instring) {
                        state.instring = false;
                    }
                    stream.next();
                    return "string";
                } else if (ch == "'" || ch == '"') {
                    state.instring = ch;
                    stream.next();
                    return "string";
                } else if (stream.match(state.intag + "}") || stream.eat("-") && stream.match(state.intag + "}")) {
                    state.intag = false;
                    return "tag";
                } else if (stream.match(operator)) {
                    state.operator = true;
                    return "operator";
                } else if (stream.match(sign)) {
                    state.sign = true;
                } else {
                    if (stream.eat(" ") || stream.sol()) {
                        if (stream.match(keywords)) {
                            return "keyword";
                        }
                        if (stream.match(atom)) {
                            return "atom";
                        }
                        if (stream.match(number)) {
                            return "number";
                        }
                        if (stream.sol()) {
                            stream.next();
                        }
                    } else {
                        stream.next();
                    }

                }
                return "variable";
            } else if (stream.eat("{")) {
                if (stream.eat("#")) {
                    state.incomment = true;
                    if (!stream.skipTo("#}")) {
                        stream.skipToEnd();
                    } else {
                        stream.eatWhile(/\#|}/);
                        state.incomment = false;
                    }
                    return "comment";
                    //Open tag
                } else if (ch = stream.eat(/\{|%/)) {
                    //Cache close tag
                    state.intag = ch;
                    if (ch == "{") {
                        state.intag = "}";
                    }
                    stream.eat("-");
                    return "tag";
                }
            }
            stream.next();
        };

        return {
            startState: function () {
                return {};
            },
            token: function (stream, state) {
                return tokenBase(stream, state);
            }
        };
    });

    CodeMirror.defineMode("twig", function (config, parserConfig) {
        var twigInner = CodeMirror.getMode(config, "twig:inner");
        if (!parserConfig || !parserConfig.base) return twigInner;
        return CodeMirror.multiplexingMode(
            CodeMirror.getMode(config, parserConfig.base), {
                open: /\{[{#%]/, close: /[}#%]\}/, mode: twigInner, parseDelimiters: true
            }
        );
    });
    CodeMirror.defineMIME("text/x-twig", "twig");
});
