text: 'use strict'
  
  let LazyResult = require('./lazy-result')
  let Root = require('./root')
  
  class Processor {
    constructor(plugins = []) {
      this.version = '8.2.10'
      this.plugins = this.normalize(plugins)
    }
  
    use(plugin) {
      this.plugins = this.plugins.concat(this.normalize([plugin]))
      return this
    }
  
    process(css, opts = {}) {
      if (
        this.plugins.length === 0 &&
        opts.parser === opts.stringifier &&
        !opts.hideNothingWarning
      ) {
        if (process.env.NODE_ENV !== 'production') {
          if (typeof console !== 'undefined' && console.warn) {
            console.warn(
              'You did not set any plugins, parser, or stringifier. ' +
                'Right now, PostCSS does nothing. Pick plugins for your case ' +
                'on https://www.postcss.parts/ and use them in postcss.config.js.'
            )
          }
        }
      }
      return new LazyResult(this, css, opts)
    }
  
    normalize(plugins) {
      let normalized = []
      for (let i of plugins) {
        if (i.postcss === true) {
          i = i()
        } else if (i.postcss) {
          i = i.postcss
        }
  
        if (typeof i === 'object' && Array.isArray(i.plugins)) {
          normalized = normalized.concat(i.plugins)
        } else if (typeof i === 'object' && i.postcssPlugin) {
          normalized.push(i)
        } else if (typeof i === 'function') {
          normalized.push(i)
        } else if (typeof i === 'object' && (i.parse || i.stringify)) {
          if (process.env.NODE_ENV !== 'production') {
            throw new Error(
              'PostCSS syntaxes cannot be used as plugins. Instead, please use ' +
                'one of the syntax/parser/stringifier options as outlined ' +
                'in your PostCSS runner documentation.'
            )
          }
        } else {
          throw new Error(i + ' is not a PostCSS plugin')
        }
      }
      return normalized
    }
  }
  
  module.exports = Processor
  Processor.default = Processor
  
  Root.registerProcessor(Processor)
  