import React, { Component } from 'react'
import { bindActionCreators } from 'redux'
import { connect } from 'react-redux'

import * as actions from '../actions'

import { Loader } from '../common'

class PaperManager extends Component {
  componentDidMount() {
    this.props.actions.getPaperInfo(this.props.match.params.key)
  }

  componentDidUpdate(oldProps) {
    if (this.props.match.params.key !== oldProps.match.params.key) {
      this.props.actions.getPaperInfo(this.props.match.params.key)
    }
  }

  render() {
    if (!this.props.match.params.key) return null
    if (this.props.api.paperInfo.loading) return <Loader />
    if (!this.props.api.paperInfo.dataset) return <div className='paperInfo'>Metadata not found</div>
    return null
  }
}

const mapStateToProps = state => ({
  api: state.api,
})
const mapDispatchToProps = dispatch => ({
  actions: bindActionCreators({ ...actions }, dispatch),
})

export default connect(mapStateToProps, mapDispatchToProps)(PaperManager)