import NextDocument, { DocumentContext, DocumentInitialProps } from 'next/document'
import { ServerStyleSheet } from 'styled-components'

export default class Document extends NextDocument {
  static async getInitialProps(ctx: DocumentContext): Promise<DocumentInitialProps> {
    const sheet = new ServerStyleSheet()
    const originalRenderPage = ctx.renderPage

    try {
      ctx.renderPage = () => {
        return originalRenderPage({
          enhanceApp: (App) => {
            return function EnhancedApp(props) {
              return sheet.collectStyles(<App {...props} />)
            }
          },
        })
      }
      const initialProps = await NextDocument.getInitialProps(ctx)
      return {
        ...initialProps,
        styles: [initialProps.styles, sheet.getStyleElement()],
      }
    } finally {
      sheet.seal()
    }
  }
}