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

//tcl mode by Ford_Lawnmower :: Based on Velocity mode by Steve O'Hara

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

    CodeMirror.defineMode("tcl", function () {
        function parseWords(str) {
            var obj = {}, words = str.split(" ");
            for (var i = 0; i < words.length; ++i) obj[words[i]] = true;
            return obj;
        }

        var keywords = parseWords("Tcl safe after append array auto_execok auto_import auto_load " +
            "auto_mkindex auto_mkindex_old auto_qualify auto_reset bgerror " +
            "binary break catch cd close concat continue dde eof encoding error " +
            "eval exec exit expr fblocked fconfigure fcopy file fileevent filename " +
            "filename flush for foreach format gets glob global history http if " +
            "incr info interp join lappend lindex linsert list llength load lrange " +
            "lreplace lsearch lset lsort memory msgcat namespace open package parray " +
            "pid pkg::create pkg_mkIndex proc puts pwd re_syntax read regex regexp " +
            "registry regsub rename resource return scan seek set socket source split " +
            "string subst switch tcl_endOfWord tcl_findLibrary tcl_startOfNextWord " +
            "tcl_wordBreakAfter tcl_startOfPreviousWord tcl_wordBreakBefore tcltest " +
            "tclvars tell time trace unknown unset update uplevel upvar variable " +
            "vwait");
        var functions = parseWords("if elseif else and not or eq ne in ni for foreach while switch");
        var isOperatorChar = /[+\-*&%=<>!?^\/\|]/;

        function chain(stream, state, f) {
            state.tokenize = f;
            return f(stream, state);
        }

        function tokenBase(stream, state) {
            var beforeParams = state.beforeParams;
            state.beforeParams = false;
            var ch = stream.next();
            if ((ch == '"' || ch == "'") && state.inParams) {
                return chain(stream, state, tokenString(ch));
            } else if (/[\[\]{}\(\),;\.]/.test(ch)) {
                if (ch == "(" && beforeParams) state.inParams = true;
                else if (ch == ")") state.inParams = false;
                return null;
            } else if (/\d/.test(ch)) {
                stream.eatWhile(/[\w\.]/);
                return "number";
            } else if (ch == "#") {
                if (stream.eat("*"))
                    return chain(stream, state, tokenComment);
                if (ch == "#" && stream.match(/ *\[ *\[/))
                    return chain(stream, state, tokenUnparsed);
                stream.skipToEnd();
                return "comment";
            } else if (ch == '"') {
                stream.skipTo(/"/);
                return "comment";
            } else if (ch == "$") {
                stream.eatWhile(/[$_a-z0-9A-Z\.{:]/);
                stream.eatWhile(/}/);
                state.beforeParams = true;
                return "builtin";
            } else if (isOperatorChar.test(ch)) {
                stream.eatWhile(isOperatorChar);
                return "comment";
            } else {
                stream.eatWhile(/[\w\$_{}\xa1-\uffff]/);
                var word = stream.current().toLowerCase();
                if (keywords && keywords.propertyIsEnumerable(word))
                    return "keyword";
                if (functions && functions.propertyIsEnumerable(word)) {
                    state.beforeParams = true;
                    return "keyword";
                }
                return null;
            }
        }

        function tokenString(quote) {
            return function (stream, state) {
                var escaped = false, next, end = false;
                while ((next = stream.next()) != null) {
                    if (next == quote && !escaped) {
                        end = true;
                        break;
                    }
                    escaped = !escaped && next == "\\";
                }
                if (end) state.tokenize = tokenBase;
                return "string";
            };
        }

        function tokenComment(stream, state) {
            var maybeEnd = false, ch;
            while (ch = stream.next()) {
                if (ch == "#" && maybeEnd) {
                    state.tokenize = tokenBase;
                    break;
                }
                maybeEnd = (ch == "*");
            }
            return "comment";
        }

        function tokenUnparsed(stream, state) {
            var maybeEnd = 0, ch;
            while (ch = stream.next()) {
                if (ch == "#" && maybeEnd == 2) {
                    state.tokenize = tokenBase;
                    break;
                }
                if (ch == "]")
                    maybeEnd++;
                else if (ch != " ")
                    maybeEnd = 0;
            }
            return "meta";
        }

        return {
            startState: function () {
                return {
                    tokenize: tokenBase,
                    beforeParams: false,
                    inParams: false
                };
            },
            token: function (stream, state) {
                if (stream.eatSpace()) return null;
                return state.tokenize(stream, state);
            }
        };
    });
    CodeMirror.defineMIME("text/x-tcl", "tcl");

});
