import theme from '../../styles/theme'
import PropTypes from 'prop-types'

import TrainingType from './trainingType'
import TrainingBlock from './trainingBlock'

function calculateRating (ratings) {
  const numberOfRatings = ratings.length
  const sumOfRatings = ratings.reduce(
    (accumulator, rating) => accumulator + rating.value,
    0
  )
  return numberOfRatings ? sumOfRatings / numberOfRatings : '-'
}

const Training = props => (
  <article>
    <h2>{props.title}</h2>
    <aside>
      <div id='trainingType'>
        <span className='caption'>Type: </span>
        <span className='data'>{props.type.name}</span>
      </div>
      <div id='trainingDate'>
        <span className='caption'>Date: </span>
        <span className='data'>
          {new Date(props.trainingDate).toLocaleDateString()}
        </span>
      </div>
      <div id='trainingLocation'>
        <span className='caption'>Location: </span>
        <span className='data'>{props.location}</span>
      </div>
      <div id='trainingRegistrations'>
        <span className='caption'>Registrations: </span>
        <span className='data'> {props.registration.length} </span>
      </div>
      <div id='trainingAttendance'>
        <span className='caption'>Attendance: </span>
        <span className='data'>{props.attendance}</span>
      </div>
      <div id='trainingRatings'>
        <span className='caption'>Rating: </span>
        <span className='data'>
          {calculateRating(props.ratings)} [
          <a href=''>{props.ratings.length}</a>] Rate it!
          <a href=''>*</a>
          <a href=''>*</a>
          <a href=''>*</a>
          <a href=''>*</a>
          <a href=''>*</a>
        </span>
      </div>
      <button>Register now!</button>
    </aside>
    <section>
      <h3>Content</h3>
      <ol>
        {props.content
          .sort(block => block.sequence)
          .map(block => (
            <TrainingBlock key={block.id} {...block} />
          ))}
      </ol>
    </section>

    <style jsx>
      {`
        article {
          display: grid;
          grid-template-areas:
            'title title'
            'information placeholder'
            'content content';
          grid-template-columns: 1fr 2fr;
          background-color: rgba(127, 127, 127, 0.5);
          background-image: url('media/man_working_out.jpg');
          background-size: auto 400px;
          background-repeat: no-repeat;
          margin: 2em 0;
        }

        article > * {
          padding: 0.2em 1em;
        }

        article > h2 {
          grid-area: title;
          font-weight: 900;
          font-size: 120%;
          background: ${theme.colors.darkerblue};
          color: ${theme.colors.offWhite};
        }

        aside {
          grid-area: information;
          background: rgba(0, 127, 0, 0.5);
          padding: 1em 2em;
          margin: 0 1em;
          min-height: 350px;
        }

        section {
          grid-area: content;
          padding: 1em 2em;
          background: rgba(127, 0, 0, 0.5);
        }

        span.caption {
          display: none;
        }
      `}
    </style>
  </article>
)

Training.propTypes = {
  title: PropTypes.string.isRequired,
  type: PropTypes.shape(TrainingType.propTypes).isRequired,
  content: PropTypes.arrayOf(TrainingBlock.propTypes).isRequired,
  createdAt: PropTypes.number,
  trainingDate: PropTypes.number.isRequired,
  location: PropTypes.string.isRequired,
  registration: PropTypes
}

export default Training