'use strict'

fs = require 'fs-extra'
os = require 'os'
utils = require 'src/utils'
log = require 'src/log'
pathUtils = require 'path'
bundleStyle = null

log = log.scope 'Document'
uid = 0
realpath = fs.realpathSync './'
tmpdir = os.tmpdir()

module.exports = (File) -> (file) ->
    bundleStyle = Neft.nmlParser.bundle

    queries = []
    addedStyles = {}

    if file instanceof File.Iterator
        return

    styleTags = []
    stylePath = "styles:#{file.path}"
    for tag in file.node.children
        if tag.name isnt 'style'
            continue

        styleTags.push tag

        # tag body
        str = tag.stringifyChildren()
        styleFile =
            data: str
            path: "#{file.path}.js"
            filename: file.path
        bundleStyle styleFile

        if utils.isEmpty(styleFile.codes)
            continue

        File.onStyle.emit styleFile

        for query, style of styleFile.queries
            itemPath = "#{stylePath}:#{style}"
            addedStyles[itemPath] = true
            queries.push
                query: query
                style: itemPath

        # detect main item with no document.query
        unless file.node.props['n-style']
            mainHasDoc = false
            mainId = styleFile.codes._main.link
            for _, id of styleFile.queries
                if id is mainId
                    mainHasDoc = true
                    break
            unless mainHasDoc
                file.node.props.set 'n-style', "#{stylePath}:#{mainId}"

    while styleTags.length > 0
        styleTags.pop().parent = null

    # detect not supported <style> tags inside another nodes
    if tag = file.node.query('style')
        log.warn "<style> inside '#{tag.parent.name}' element detected;" +
            ' <style> needs to be defined as top-level element in your file or component'

    unless utils.isEmpty(queries)
        File.Style.applyStyleQueriesInDocument file, queries

    return