import Link from '../Link/Link'

const Pagination = ({ pageCount, currentPage, url, className }) => {
  let firstPage = false
  let lastPage = false
  let dotsPrevPage = false
  let dotsNextPage = false
  let urlParameterPrefix = url.includes('?') ? '&' : '?'

  return (
    pageCount > 1 && (
      <div className={`pagination ${className}`}>
        {Array.from(Array(pageCount)).map((v, i) => {
          let page = i + 1
          let rangePrevPage = currentPage - 2
          let rangeNextPage = currentPage + 2
          let PageComponent = (
            <Link
              key={i}
              href={`${url + urlParameterPrefix}page=${page}`}
              className={
                'pagination-item' + (page == currentPage ? ' pagination-item--active ' : '')
              }
            >
              {page}
            </Link>
          )
          let DotsComponent = (
            <div key={i} className='pagination-dots'>
              ...
            </div>
          )

          if (pageCount == 7) {
            return PageComponent
          }

          if (currentPage == 1) rangeNextPage += 3
          if (currentPage == 2) rangeNextPage += 2
          if (currentPage == 3) rangeNextPage += 1
          if (currentPage == 4) rangePrevPage -= 1
          if (currentPage == pageCount) rangePrevPage -= 3
          if (currentPage == pageCount - 1) rangePrevPage -= 2
          if (currentPage == pageCount - 2) rangePrevPage -= 1
          if (currentPage == pageCount - 3) rangeNextPage += 1

          if (page > rangePrevPage && page < rangeNextPage) {
            return PageComponent
          }

          if (page == 1 && rangePrevPage >= 1 && !firstPage) {
            firstPage = true
            return PageComponent
          }

          if (page == pageCount && rangeNextPage <= pageCount && !lastPage) {
            lastPage = true
            return PageComponent
          }

          if (page > currentPage && pageCount - currentPage > 1 && !dotsNextPage) {
            dotsNextPage = true
            return DotsComponent
          }

          if (page < currentPage && currentPage - 1 > 1 && !dotsPrevPage) {
            dotsPrevPage = true
            return DotsComponent
          }
        })}
      </div>
    )
  )
}

Pagination.defaultProps = {
  className: ''
}

export default Pagination