// 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'))
    else if (typeof define == 'function' && define.amd)
        // AMD
        define(['../../lib/codemirror'], mod)
    // Plain browser env
    else mod(CodeMirror)
})(function (CodeMirror) {
    'use strict'

    CodeMirror.defineMode('tiki', function (config) {
        function inBlock(style, terminator, returnTokenizer) {
            return function (stream, state) {
                while (!stream.eol()) {
                    if (stream.match(terminator)) {
                        state.tokenize = inText
                        break
                    }
                    stream.next()
                }

                if (returnTokenizer) state.tokenize = returnTokenizer

                return style
            }
        }

        function inLine(style) {
            return function (stream, state) {
                while (!stream.eol()) {
                    stream.next()
                }
                state.tokenize = inText
                return style
            }
        }

        function inText(stream, state) {
            function chain(parser) {
                state.tokenize = parser
                return parser(stream, state)
            }

            var sol = stream.sol()
            var ch = stream.next()

            //non start of line
            switch (
                ch //switch is generally much faster than if, so it is used here
            ) {
                case '{': //plugin
                    stream.eat('/')
                    stream.eatSpace()
                    stream.eatWhile(/[^\s\u00a0=\"\'\/?(}]/)
                    state.tokenize = inPlugin
                    return 'tag'
                case '_': //bold
                    if (stream.eat('_')) return chain(inBlock('strong', '__', inText))
                    break
                case "'": //italics
                    if (stream.eat("'")) return chain(inBlock('em', "''", inText))
                    break
                case '(': // Wiki Link
                    if (stream.eat('(')) return chain(inBlock('variable-2', '))', inText))
                    break
                case '[': // Weblink
                    return chain(inBlock('variable-3', ']', inText))
                    break
                case '|': //table
                    if (stream.eat('|')) return chain(inBlock('comment', '||'))
                    break
                case '-':
                    if (stream.eat('=')) {
                        //titleBar
                        return chain(inBlock('header string', '=-', inText))
                    } else if (stream.eat('-')) {
                        //deleted
                        return chain(inBlock('error tw-deleted', '--', inText))
                    }
                    break
                case '=': //underline
                    if (stream.match('==')) return chain(inBlock('tw-underline', '===', inText))
                    break
                case ':':
                    if (stream.eat(':')) return chain(inBlock('comment', '::'))
                    break
                case '^': //box
                    return chain(inBlock('tw-box', '^'))
                    break
                case '~': //np
                    if (stream.match('np~')) return chain(inBlock('meta', '~/np~'))
                    break
            }

            //start of line types
            if (sol) {
                switch (ch) {
                    case '!': //header at start of line
                        if (stream.match('!!!!!')) {
                            return chain(inLine('header string'))
                        } else if (stream.match('!!!!')) {
                            return chain(inLine('header string'))
                        } else if (stream.match('!!!')) {
                            return chain(inLine('header string'))
                        } else if (stream.match('!!')) {
                            return chain(inLine('header string'))
                        } else {
                            return chain(inLine('header string'))
                        }
                        break
                    case '*': //unordered list line item, or <li /> at start of line
                    case '#': //ordered list line item, or <li /> at start of line
                    case '+': //ordered list line item, or <li /> at start of line
                        return chain(inLine('tw-listitem bracket'))
                        break
                }
            }

            //stream.eatWhile(/[&{]/); was eating up plugins, turned off to act less like html and more like tiki
            return null
        }

        var indentUnit = config.indentUnit

        // Return variables for tokenizers
        var pluginName, type
        function inPlugin(stream, state) {
            var ch = stream.next()
            var peek = stream.peek()

            if (ch == '}') {
                state.tokenize = inText
                //type = ch == ")" ? "endPlugin" : "selfclosePlugin"; inPlugin
                return 'tag'
            } else if (ch == '(' || ch == ')') {
                return 'bracket'
            } else if (ch == '=') {
                type = 'equals'

                if (peek == '>') {
                    stream.next()
                    peek = stream.peek()
                }

                //here we detect values directly after equal character with no quotes
                if (!/[\'\"]/.test(peek)) {
                    state.tokenize = inAttributeNoQuote()
                }
                //end detect values

                return 'operator'
            } else if (/[\'\"]/.test(ch)) {
                state.tokenize = inAttribute(ch)
                return state.tokenize(stream, state)
            } else {
                stream.eatWhile(/[^\s\u00a0=\"\'\/?]/)
                return 'keyword'
            }
        }

        function inAttribute(quote) {
            return function (stream, state) {
                while (!stream.eol()) {
                    if (stream.next() == quote) {
                        state.tokenize = inPlugin
                        break
                    }
                }
                return 'string'
            }
        }

        function inAttributeNoQuote() {
            return function (stream, state) {
                while (!stream.eol()) {
                    var ch = stream.next()
                    var peek = stream.peek()
                    if (ch == ' ' || ch == ',' || /[ )}]/.test(peek)) {
                        state.tokenize = inPlugin
                        break
                    }
                }
                return 'string'
            }
        }

        var curState, setStyle
        function pass() {
            for (var i = arguments.length - 1; i >= 0; i--) curState.cc.push(arguments[i])
        }

        function cont() {
            pass.apply(null, arguments)
            return true
        }

        function pushContext(pluginName, startOfLine) {
            var noIndent = curState.context && curState.context.noIndent
            curState.context = {
                prev: curState.context,
                pluginName: pluginName,
                indent: curState.indented,
                startOfLine: startOfLine,
                noIndent: noIndent,
            }
        }

        function popContext() {
            if (curState.context) curState.context = curState.context.prev
        }

        function element(type) {
            if (type == 'openPlugin') {
                curState.pluginName = pluginName
                return cont(attributes, endplugin(curState.startOfLine))
            } else if (type == 'closePlugin') {
                var err = false
                if (curState.context) {
                    err = curState.context.pluginName != pluginName
                    popContext()
                } else {
                    err = true
                }
                if (err) setStyle = 'error'
                return cont(endcloseplugin(err))
            } else if (type == 'string') {
                if (!curState.context || curState.context.name != '!cdata') pushContext('!cdata')
                if (curState.tokenize == inText) popContext()
                return cont()
            } else return cont()
        }

        function endplugin(startOfLine) {
            return function (type) {
                if (type == 'selfclosePlugin' || type == 'endPlugin') return cont()
                if (type == 'endPlugin') {
                    pushContext(curState.pluginName, startOfLine)
                    return cont()
                }
                return cont()
            }
        }

        function endcloseplugin(err) {
            return function (type) {
                if (err) setStyle = 'error'
                if (type == 'endPlugin') return cont()
                return pass()
            }
        }

        function attributes(type) {
            if (type == 'keyword') {
                setStyle = 'attribute'
                return cont(attributes)
            }
            if (type == 'equals') return cont(attvalue, attributes)
            return pass()
        }
        function attvalue(type) {
            if (type == 'keyword') {
                setStyle = 'string'
                return cont()
            }
            if (type == 'string') return cont(attvaluemaybe)
            return pass()
        }
        function attvaluemaybe(type) {
            if (type == 'string') return cont(attvaluemaybe)
            else return pass()
        }
        return {
            startState: function () {
                return { tokenize: inText, cc: [], indented: 0, startOfLine: true, pluginName: null, context: null }
            },
            token: function (stream, state) {
                if (stream.sol()) {
                    state.startOfLine = true
                    state.indented = stream.indentation()
                }
                if (stream.eatSpace()) return null

                setStyle = type = pluginName = null
                var style = state.tokenize(stream, state)
                if ((style || type) && style != 'comment') {
                    curState = state
                    while (true) {
                        var comb = state.cc.pop() || element
                        if (comb(type || style)) break
                    }
                }
                state.startOfLine = false
                return setStyle || style
            },
            indent: function (state, textAfter) {
                var context = state.context
                if (context && context.noIndent) return 0
                if (context && /^{\//.test(textAfter)) context = context.prev
                while (context && !context.startOfLine) context = context.prev
                if (context) return context.indent + indentUnit
                else return 0
            },
            electricChars: '/',
        }
    })

    CodeMirror.defineMIME('text/tiki', 'tiki')
})