import * as q from '../../../../../backend/src/Model'
import ActionButtons from './ActionButtons'
import Copy from '../../helper/Copy'
import DateFormatter from '../../helper/DateFormatter'
import MessageHistory from './MessageHistory'
import Panel from '../Panel'
import React, { useCallback } from 'react'
import ValueRenderer from './ValueRenderer'
import { AppState } from '../../../reducers'
import { Base64Message } from '../../../../../backend/src/Model/Base64Message'
import { bindActionCreators } from 'redux'
import { Theme, Typography, withStyles } from '@material-ui/core'
import { connect } from 'react-redux'
import { sidebarActions } from '../../../actions'
import DeleteSelectedTopicButton from './DeleteSelectedTopicButton'

interface Props {
  node?: q.TreeNode<any>
  sidebarActions: typeof sidebarActions
  classes: any
  lastUpdate: number
  compareMessage?: q.Message
}

function RenderedValue(props: { node?: q.TreeNode<any>; compareMessage?: q.Message }) {
  const { node, compareMessage } = props

  if (!node || !node.message) {
    return null
  }

  return <ValueRenderer treeNode={node} message={node.message} compareWith={compareMessage} />
}

function ValuePanel(props: Props) {
  const { node, compareMessage } = props

  function renderViewOptions() {
    if (!props.node || !props.node.message || !props.node.mqttMessage) {
      return null
    }

    return (
      <div style={{ width: '100%', display: 'flex', paddingLeft: '8px', flexWrap: 'wrap' }}>
        <span style={{ marginTop: '2px', flexGrow: 1 }}>
          <ActionButtons />
        </span>
        <span style={{ flex: 6, textAlign: 'right' }}>
          {props.node.mqttMessage.retain ? <DeleteSelectedTopicButton /> : null}
        </span>
        {messageMetaInfo()}
      </div>
    )
  }

  function messageMetaInfo() {
    if (!props.node || !props.node.message || !props.node.mqttMessage) {
      return null
    }

    return (
      <span style={{ width: '100%', paddingLeft: '8px', flex: 6 }}>
        <Typography style={{ textAlign: 'right' }}>QoS: {props.node.mqttMessage.qos}</Typography>
        <Typography style={{ textAlign: 'right' }}>
          <i>
            <DateFormatter date={props.node.message.received} />
          </i>
        </Typography>
      </span>
    )
  }

  const handleMessageHistorySelect = useCallback(
    (message: q.Message) => {
      if (message !== compareMessage) {
        props.sidebarActions.setCompareMessage(message)
      } else {
        props.sidebarActions.setCompareMessage(undefined)
      }
    },
    [compareMessage]
  )

  const copyValue =
    node && node.message && node.message.value ? (
      <Copy value={Base64Message.toUnicodeString(node.message.value)} />
    ) : null

  return (
    <Panel>
      <span>Value {copyValue}</span>
      <span style={{ width: '100%' }}>
        {renderViewOptions()}
        <div style={{ marginBottom: '-8px' }}>
          <React.Suspense fallback={<div>Loading...</div>}>
            <RenderedValue node={node} compareMessage={compareMessage} />
          </React.Suspense>
        </div>
        <div>
          <MessageHistory onSelect={handleMessageHistorySelect} selected={props.compareMessage} node={props.node} />
        </div>
      </span>
    </Panel>
  )
}

const mapDispatchToProps = (dispatch: any) => {
  return {
    sidebarActions: bindActionCreators(sidebarActions, dispatch),
  }
}

const mapStateToProps = (state: AppState) => {
  return {
    node: state.tree.get('selectedTopic'),
    compareMessage: state.sidebar.get('compareMessage'),
  }
}

const styles = (theme: Theme) => ({
  heading: {
    fontSize: theme.typography.pxToRem(15),
    fontWeight: theme.typography.fontWeightRegular,
  },
})

export default connect(
  mapStateToProps,
  mapDispatchToProps
)(withStyles(styles)(ValuePanel))