import React from 'react'
import PropTypes from 'prop-types'
import Tabs from '@mui/material/Tabs'
import Tab from '@mui/material/Tab'
import { Link } from 'react-router-dom'
import Paper from '@mui/material/Paper'
import intl from 'react-intl-universal'

/**
 * A component for generating view tabs for a faceted search perspective or an entity landing page.
 */
class PerspectiveTabs extends React.Component {
  constructor (props) {
    super(props)
    this.state = {
      value: this.pathnameToValue(this.props.routeProps.location.pathname)
    }
  }

  componentDidUpdate = prevProps => {
    const newPath = this.props.routeProps.location.pathname
    const oldPath = prevProps.routeProps.location.pathname
    if (newPath !== oldPath) {
      this.setState({ value: this.pathnameToValue(newPath) })
    }

    // Fix tabs indicator not showing on first load, not needed any more?
    // https://stackoverflow.com/a/61205108
    // const evt = document.createEvent('UIEvents')
    // evt.initUIEvent('resize', true, false, window, 0)
    // window.dispatchEvent(evt)
  }

  pathnameToValue = pathname => {
    const activeID = pathname.split('/').pop()
    let value = 0
    this.props.tabs.forEach(tab => {
      if (tab.id === activeID) {
        value = tab.value
      }
    })
    return value
  }

  handleChange = (event, value) => {
    this.setState({ value })
  };

  render () {
    const { tabs } = this.props
    const { value } = this.state
    // const largeScreen = screenSize === 'xl'
    const variant = tabs.length > 3 ? 'scrollable' : 'fullWidth'
    // const scrollButtons = tabs.length > 3 ? 'auto' : 'on'
    return (
      <Paper
        sx={theme => ({
          flexGrow: 1,
          borderBottomLeftRadius: 0,
          borderBottomRightRadius: 0
        })}
      >
        <Tabs
          value={value}
          onChange={this.handleChange}
          indicatorColor='secondary'
          textColor='secondary'
          variant={variant}
        >
          {tabs.map(tab =>
            <Tab
              sx={theme => ({
                paddingTop: theme.spacing(0.5),
                paddingBottom: theme.spacing(0.5),
                minHeight: this.props.layoutConfig.tabHeight,
                '& .MuiSvgIcon-root': {
                  marginBottom: theme.spacing(0.5)
                }
              })}
              key={tab.value}
              value={tab.value}
              icon={tab.icon}
              label={intl.get(`tabs.${tab.id}`)}
              component={Link}
              to={tab.id}
              wrapped
            />
          )}
        </Tabs>
      </Paper>
    )
  }
}

PerspectiveTabs.propTypes = {
  routeProps: PropTypes.object.isRequired,
  tabs: PropTypes.array.isRequired,
  screenSize: PropTypes.string.isRequired,
  layoutConfig: PropTypes.object.isRequired
}

export const PerspectiveTabsComponent = PerspectiveTabs

export default PerspectiveTabs