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import type { TextDocument, Position } from 'vscode-languageserver'
import { isInsideTag, isVueDoc, isSvelteDoc, isHtmlDoc } from './html'
import { isJsDoc } from './js'
import { State } from './state'

export const CSS_LANGUAGES = ['css', 'less', 'postcss', 'sass', 'scss', 'stylus', 'sugarss']

export function isCssDoc(state: State, doc: TextDocument): boolean {
  const userCssLanguages = Object.keys(state.editor.userLanguages).filter((lang) =>
    CSS_LANGUAGES.includes(state.editor.userLanguages[lang])
  )

  return [...CSS_LANGUAGES, ...userCssLanguages].indexOf(doc.languageId) !== -1
}

export function isCssContext(state: State, doc: TextDocument, position: Position): boolean {
  if (isCssDoc(state, doc)) {
    return true
  }

  if (isHtmlDoc(state, doc) || isVueDoc(doc) || isSvelteDoc(doc) || isJsDoc(state, doc)) {
    let str = doc.getText({
      start: { line: 0, character: 0 },
      end: position,
    })

    return isInsideTag(str, ['style'])
  }

  return false
}