'use strict'

var VFile = require('vfile')

var unified = require('unified')

var markdown = require('remark-parse')

var frontmatter = require('remark-frontmatter')

var html = require('rehype-parse')

var english = require('retext-english')

var equality = require('retext-equality')

var profanities = require('retext-profanities')

var remark2retext = require('remark-retext')

var rehype2retext = require('rehype-retext')

var sort = require('vfile-sort')

var filter = require('./filter')

module.exports = alex

alex.text = noMarkdown

alex.markdown = alex

alex.html = htmlParse

function makeText(config) {

return unified()

.use(english)

.use(equality, {

noBinary: config && config.noBinary

})

.use(profanities, {

sureness: config && config.profanitySureness

})

}

// Alex’s core.

function core(value, config, processor) {

var allow

var deny

if (Array.isArray(config)) {

allow = config

} else if (config) {

allow = config.allow

deny = config.deny

}

var file = new VFile(value)

var tree = processor.use(filter, {allow: allow, deny: deny}).parse(file)

processor.runSync(tree, file)

sort(file)

return file

}

// Alex.

function alex(value, config) {

return core(

value,

config,

unified()

.use(markdown)

.use(frontmatter, ['yaml', 'toml'])

.use(remark2retext, makeText(config))

)

}

// Alex, for HTML.

function htmlParse(value, config) {

return core(

value,

config,

unified()

.use(html)

.use(rehype2retext, makeText(config))

)

}

// Alex, without the markdown.

function noMarkdown(value, config) {

return core(value, config, makeText(config))

}