import { withStyles } from '@material-ui/core/styles'
import React from 'react'
import LabelChange from './LabelChange'
import Message from './Message'

const styles = theme => ({
  main: {
    '& > *:not(:last-child)': {
      marginBottom: 10
    }
  }
})

class Timeline extends React.Component {

  props: {
    ops: Array,
    fetchMore: (any) => any,
    classes: any,
  }

  render() {
    const {ops, classes} = this.props

    return (
      <div className={classes.main}>
        { ops.map((op, index) => {
          switch (op.__typename) {
            case 'CreateOperation':
              return <Message key={index} op={op}/>
            case 'AddCommentOperation':
              return <Message key={index} op={op}/>
            case 'LabelChangeOperation':
              return <LabelChange key={index} op={op}/>

            default:
              console.log('unsupported operation type ' + op.__typename)
              return null
          }
        })}
      </div>
    )
  }
}

export default withStyles(styles)(Timeline)