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

    CodeMirror.defineSimpleMode('handlebars-tags', {
        start: [
            { regex: /\{\{\{/, push: 'handlebars_raw', token: 'tag' },
            { regex: /\{\{!--/, push: 'dash_comment', token: 'comment' },
            { regex: /\{\{!/, push: 'comment', token: 'comment' },
            { regex: /\{\{/, push: 'handlebars', token: 'tag' },
        ],
        handlebars_raw: [{ regex: /\}\}\}/, pop: true, token: 'tag' }],
        handlebars: [
            { regex: /\}\}/, pop: true, token: 'tag' },

            // Double and single quotes
            { regex: /"(?:[^\\"]|\\.)*"?/, token: 'string' },
            { regex: /'(?:[^\\']|\\.)*'?/, token: 'string' },

            // Handlebars keywords
            { regex: />|[#\/]([A-Za-z_]\w*)/, token: 'keyword' },
            { regex: /(?:else|this)\b/, token: 'keyword' },

            // Numeral
            { regex: /\d+/i, token: 'number' },

            // Atoms like = and .
            { regex: /=|~|@|true|false/, token: 'atom' },

            // Paths
            { regex: /(?:\.\.\/)*(?:[A-Za-z_][\w\.]*)+/, token: 'variable-2' },
        ],
        dash_comment: [
            { regex: /--\}\}/, pop: true, token: 'comment' },

            // Commented code
            { regex: /./, token: 'comment' },
        ],
        comment: [
            { regex: /\}\}/, pop: true, token: 'comment' },
            { regex: /./, token: 'comment' },
        ],
        meta: {
            blockCommentStart: '{{--',
            blockCommentEnd: '--}}',
        },
    })

    CodeMirror.defineMode('handlebars', function (config, parserConfig) {
        var handlebars = CodeMirror.getMode(config, 'handlebars-tags')
        if (!parserConfig || !parserConfig.base) return handlebars
        return CodeMirror.multiplexingMode(CodeMirror.getMode(config, parserConfig.base), { open: '{{', close: /\}\}\}?/, mode: handlebars, parseDelimiters: true })
    })

    CodeMirror.defineMIME('text/x-handlebars-template', 'handlebars')
})