import { h, Component } from 'preact'
import { bindActionCreators } from 'redux'
import { connect } from 'react-redux'
import { Link } from 'react-router-dom';
import moment from 'moment'
import * as util from '../util'

const defaultFields = new Set(['date', 'size'])

export const FileList = props => {
  const {
    files,
    fields, sort, title,
    linkFiles, onClick,
    orderBy='name asc',
    className='',
    fileListClassName='filelist',
    rowClassName='row file'
  } = props
  const { mapFn, sortFn } = orderByFn(orderBy)
  const fileList = (files || [])
    .map(mapFn)
    .sort(sortFn)
    .map(pair =>
      <FileRow
        file={pair[1]}
        fields={fieldSet(fields)}
        className={rowClassName}
        linkFiles
        onClick
      />
    )
  return (
    <div className={'rows ' + className}>
      <div class='row heading'>
        {(files && files.length)
        ? (title && <h3>{title}</h3>)
        : <h4>No files</h4>}
      </div>

	  	<div className={'rows ' + fileListClassName}>
	  		{fileList}
      </div>
  	</div>
	)
}

const numericSort = {
  asc: (a,b) => a[0] - b[0],
  desc: (a,b) => b[0] - a[0],
}
const stringSort = {
  asc: (a,b) => a[0].localeCompare(b[0]),
  desc: (a,b) => b[0].localeCompare(a[0]),
}
export const orderByFn = (s='name asc') => {
  const [field='name', direction='asc'] = s.split(' ')
  let mapFn, sortFn
  switch (field) {
    case 'epoch':
      mapFn = a => [a.epoch || a.epochs, a]
      sortFn = numericSort[direction]
      break
    case 'size':
      mapFn = a => [a.size, a]
      sortFn = numericSort[direction]
      break
    case 'date':
      mapFn = a => [+new Date(a.date || a.created_at), a]
      sortFn = numericSort[direction]
      break
    case 'name':
    default:
      mapFn = a => [a.id || a.name, a]
      sortFn = stringSort[direction]
      break
  }
  return { mapFn, sortFn }
}

export const fieldSet = fields => {
  if (fields) {
    if (fields instanceof Set) {
      return fields
    }
    return new Set(fields.split(' '))
  }
  return defaultFields
}

export const FileRow = props => {
  const { file, linkFiles, onClick, className='row file', username='' } = props
  const fields = fieldSet(props.fields)

  const size = util.hush_size(file.size)
  const date = file.date || file.created_at

  return (
    <div class={className} key={file.name}>
      <div className="filename" title={file.name || file.url}>
        {file.persisted === false
          ? <span>{file.name || file.url}</span>
          : (linkFiles && file.url)
          ? <a target='_blank' href={file.url}>{file.name || file.url}</a>
          : <span class='link' onClick={() => onClick(file)}>{file.name || file.url}</span>
        }
      </div>
      {fields.has('age') &&
        <div className={"age " + util.carbon_date(date)}>{util.get_age(date)}</div>
      }
      {fields.has('username') &&
        <div className={"username"}>{username}</div>
      }
      {fields.has('date') &&
        <div className={"date " + util.carbon_date(date)}>{moment(date).format("YYYY-MM-DD")}</div>
      }
      {fields.has('datetime') &&
        <div className={"datetime " + util.carbon_date(date)}>{moment(date).format("YYYY-MM-DD h:mm a")}</div>
      }
      {fields.has('size') &&
        <div className={"size " + size[0]}>{size[1]}</div>
      }
      {fields.has('epoch') &&
        <div className="epoch">{file.epoch > 0 ? 'epoch ' + file.epoch : ' '}</div>
      }
      {(fields.has('activity') || fields.has('module')) &&
        <div className='activity'>
          {fields.has('activity') && file.activity}
          {fields.has('module') && file.module}
        </div>
      }
      {props.options && props.options(file)}
    </div>
  )
}