// 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'

    function errorIfNotEmpty(stream) {
        var nonWS = stream.match(/^\s*\S/)
        stream.skipToEnd()
        return nonWS ? 'error' : null
    }

    CodeMirror.defineMode('asciiarmor', function () {
        return {
            token: function (stream, state) {
                var m
                if (state.state == 'top') {
                    if (stream.sol() && (m = stream.match(/^-----BEGIN (.*)?-----\s*$/))) {
                        state.state = 'headers'
                        state.type = m[1]
                        return 'tag'
                    }
                    return errorIfNotEmpty(stream)
                } else if (state.state == 'headers') {
                    if (stream.sol() && stream.match(/^\w+:/)) {
                        state.state = 'header'
                        return 'atom'
                    } else {
                        var result = errorIfNotEmpty(stream)
                        if (result) state.state = 'body'
                        return result
                    }
                } else if (state.state == 'header') {
                    stream.skipToEnd()
                    state.state = 'headers'
                    return 'string'
                } else if (state.state == 'body') {
                    if (stream.sol() && (m = stream.match(/^-----END (.*)?-----\s*$/))) {
                        if (m[1] != state.type) return 'error'
                        state.state = 'end'
                        return 'tag'
                    } else {
                        if (stream.eatWhile(/[A-Za-z0-9+\/=]/)) {
                            return null
                        } else {
                            stream.next()
                            return 'error'
                        }
                    }
                } else if (state.state == 'end') {
                    return errorIfNotEmpty(stream)
                }
            },
            blankLine: function (state) {
                if (state.state == 'headers') state.state = 'body'
            },
            startState: function () {
                return { state: 'top', type: null }
            },
        }
    })

    CodeMirror.defineMIME('application/pgp', 'asciiarmor')
    CodeMirror.defineMIME('application/pgp-encrypted', 'asciiarmor')
    CodeMirror.defineMIME('application/pgp-keys', 'asciiarmor')
    CodeMirror.defineMIME('application/pgp-signature', 'asciiarmor')
})