import React from 'react'
import {
  Edit,
  SimpleForm,
  TextInput,
  required,
  Toolbar,
  SaveButton,
  NumberField,
  DateField,
  FunctionField,
  useTranslate,
} from 'react-admin'
import { makeStyles } from '@material-ui/core/styles'
import { Divider, Typography } from '@material-ui/core'
import DeleteLibraryButton from './DeleteLibraryButton'
import { Title } from '../common'

const useStyles = makeStyles({
  toolbar: {
    display: 'flex',
    justifyContent: 'space-between',
  },
  divider: {
    marginTop: '1em',
    marginBottom: '1em',
  },
  stats: {
    display: 'grid',
    gridTemplateColumns: '1fr 1fr 1fr',
    gap: '0 1em',
    '& > *': {
      padding: '0.2em 0',
    },
  },
})

const LibraryTitle = ({ record }) => {
  const translate = useTranslate()
  const resourceName = translate('resources.library.name', { smart_count: 1 })
  return (
    <Title subTitle={`${resourceName} ${record ? `"${record.name}"` : ''}`} />
  )
}

const LibraryToolbar = (props) => (
  <Toolbar {...props} classes={useStyles()}>
    <SaveButton />
    {props.record && props.record.id !== 1 && <DeleteLibraryButton {...props} />}
  </Toolbar>
)

const formatDuration = (totalSeconds) => {
  if (totalSeconds == null || totalSeconds < 0) {
    return '0s'
  }
  const hours = Math.floor(totalSeconds / 3600)
  const minutes = Math.floor((totalSeconds % 3600) / 60)
  const seconds = Math.floor(totalSeconds % 60)

  const parts = []
  if (hours > 0) {
    parts.push(`${hours}h`)
  }
  if (minutes > 0) {
    parts.push(`${minutes}m`)
  }
  if (seconds > 0 || parts.length === 0) {
    parts.push(`${seconds}s`)
  }
  return parts.join(' ')
}

const formatBytes = (bytes, decimals = 2) => {
  if (bytes === 0) return '0 Bytes'
  const k = 1024
  const dm = decimals < 0 ? 0 : decimals
  const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
  const i = Math.floor(Math.log(bytes) / Math.log(k))
  return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i]
}

const LibraryEdit = (props) => {
  const classes = useStyles()
  const translate = useTranslate()
  const isFirstLibrary = props.id === '1'

  return (
    <Edit title={<LibraryTitle />} undoable={false} {...props}>
      <SimpleForm variant={'outlined'} toolbar={<LibraryToolbar />}>
        <TextInput source="name" validate={[required()]} />
        <TextInput source="path" validate={[required()]} fullWidth disabled={isFirstLibrary} />

        <Divider className={classes.divider} fullWidth />

        <Typography variant="h6" gutterBottom>
          Statistics
        </Typography>
        <div className={classes.stats} fullWidth>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.totalSongs')}
            </Typography>
            <NumberField source="totalSongs" />
          </div>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.totalAlbums')}
            </Typography>
            <NumberField source="totalAlbums" />
          </div>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.totalArtists')}
            </Typography>
            <NumberField source="totalArtists" />
          </div>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.totalFolders')}
            </Typography>
            <NumberField source="totalFolders" />
          </div>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.totalFiles')}
            </Typography>
            <NumberField source="totalFiles" />
          </div>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.totalMissingFiles')}
            </Typography>
            <NumberField source="totalMissingFiles" />
          </div>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.totalSize')}
            </Typography>
            <FunctionField render={(record) => formatBytes(record.totalSize)} />
          </div>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.totalDuration')}
            </Typography>
            <FunctionField
              render={(record) => formatDuration(record.totalDuration)}
            />
          </div>
        </div>
        <Divider className={classes.divider} fullWidth />
        <div className={classes.stats} fullWidth>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.lastScanAt')}
            </Typography>
            <DateField source="lastScanAt" showTime />
          </div>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.createdAt')}
            </Typography>
            <DateField source="createdAt" showTime />
          </div>
          <div>
            <Typography variant="caption" display="block" color="textSecondary">
              {translate('resources.library.fields.updatedAt')}
            </Typography>
            <DateField source="updatedAt" showTime />
          </div>
        </div>
      </SimpleForm>
    </Edit>
  )
}

export default LibraryEdit