import React from 'react'
import PropTypes from 'prop-types'
import classNames from 'classnames'
import { useTranslation } from 'react-i18next'
import Icon from '../../../shared/components/icon'

function PreviewLogsToggleButton({
  onToggle,
  showLogs,
  logsState: { nErrors, nWarnings }
}) {
  const toggleButtonClasses = classNames('btn', 'btn-xs', 'btn-toggle-logs', {
    'btn-danger': !showLogs && nErrors,
    'btn-warning': !showLogs && !nErrors && nWarnings,
    'btn-default': showLogs || (!nErrors && !nWarnings)
  })

  function handleOnClick(e) {
    e.currentTarget.blur()
    onToggle()
  }

  return (
    <button
      type="button"
      className={toggleButtonClasses}
      onClick={handleOnClick}
    >
      {showLogs ? (
        <ViewPdfButton />
      ) : (
        <CompilationResultIndicator nErrors={nErrors} nWarnings={nWarnings} />
      )}
    </button>
  )
}

function CompilationResultIndicator({ nErrors, nWarnings }) {
  if (nErrors || nWarnings) {
    return (
      <LogsCompilationResultIndicator
        logType={nErrors ? 'errors' : 'warnings'}
        nLogs={nErrors || nWarnings}
      />
    )
  } else {
    return <ViewLogsButton />
  }
}

function LogsCompilationResultIndicator({ logType, nLogs }) {
  const { t } = useTranslation()
  const label =
    logType === 'errors' ? t('your_project_has_errors') : t('view_warnings')
  return (
    <>
      <Icon type="file-text-o" />
      <span className="btn-toggle-logs-label" aria-label={label}>
        {`${label} (${nLogs > 9 ? '9+' : nLogs})`}
      </span>
    </>
  )
}

function ViewLogsButton() {
  const { t } = useTranslation()
  return (
    <>
      <Icon type="file-text-o" />
      <span className="btn-toggle-logs-label">{t('view_logs')}</span>
    </>
  )
}

function ViewPdfButton() {
  const { t } = useTranslation()
  return (
    <>
      <Icon type="file-pdf-o" />
      <span className="btn-toggle-logs-label">{t('view_pdf')}</span>
    </>
  )
}

PreviewLogsToggleButton.propTypes = {
  onToggle: PropTypes.func.isRequired,
  logsState: PropTypes.shape({
    nErrors: PropTypes.number.isRequired,
    nWarnings: PropTypes.number.isRequired,
    nLogEntries: PropTypes.number.isRequired
  }),
  showLogs: PropTypes.bool.isRequired
}

LogsCompilationResultIndicator.propTypes = {
  logType: PropTypes.string.isRequired,
  nLogs: PropTypes.number.isRequired
}

export default PreviewLogsToggleButton