// 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)
    // Plain browser env
    else 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')
})