// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://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)
    // Plain browser env
    else 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)
            },
            lineComment: '#',
        }
    })
    CodeMirror.defineMIME('text/x-tcl', 'tcl')
})