/* global alert, Event */
import React from 'react'

import { bindActionCreators } from 'redux'
import { connect } from 'react-redux'
import * as actions from '../actions'

import MediaOverlay from './Overlay/Media'
import LoadingOverlay from './Overlay/Loading'
import Map from './Map.jsx'
import Toolbar from './Toolbar/Layout'
import CardStack from './CardStack.jsx'
import NarrativeControls from './presentational/Narrative/Controls.js'
import InfoPopUp from './InfoPopup.jsx'
import Timeline from './Timeline.jsx'
import Notification from './Notification.jsx'
import StateOptions from './StateOptions.jsx'
import StaticPage from './StaticPage'
import TemplateCover from './TemplateCover'

import colors from '../common/global'
import { binarySearch, insetSourceFrom, findDescriptionInFilterTree } from '../common/utilities'
import { isMobile } from 'react-device-detect'

class Dashboard extends React.Component {
  constructor (props) {
    super(props)

    this.handleViewSource = this.handleViewSource.bind(this)
    this.handleHighlight = this.handleHighlight.bind(this)
    this.setNarrative = this.setNarrative.bind(this)
    this.setNarrativeFromFilters = this.setNarrativeFromFilters.bind(this)
    this.handleSelect = this.handleSelect.bind(this)
    this.getCategoryColor = this.getCategoryColor.bind(this)
    this.findEventIdx = this.findEventIdx.bind(this)
    this.onKeyDown = this.onKeyDown.bind(this)
    this.selectNarrativeStep = this.selectNarrativeStep.bind(this)
  }

  componentDidMount () {
    if (!this.props.app.isMobile) {
      this.props.actions.fetchDomain()
        .then(domain => this.props.actions.updateDomain({
          domain,
          features: this.props.features
        }))
    }
    // NOTE: hack to get the timeline to always show. Not entirely sure why
    // this is necessary.
    window.dispatchEvent(new Event('resize'))
  }

  handleHighlight (highlighted) {
    this.props.actions.updateHighlighted((highlighted) || null)
  }

  handleViewSource (source) {
    this.props.actions.updateSource(source)
  }

  findEventIdx (theEvent) {
    const { events } = this.props.domain
    return binarySearch(
      events,
      theEvent,
      (theev, otherev) => {
        return theev.datetime - otherev.datetime
      }
    )
  }

  handleSelect (selected, axis) {
    const matchedEvents = []
    const TIMELINE_AXIS = 0
    if (axis === TIMELINE_AXIS) {
      matchedEvents.push(selected)
      // find in events
      const { events } = this.props.domain
      const idx = this.findEventIdx(selected)
      // check events before
      let ptr = idx - 1

      while (
        ptr >= 0 &&
        (events[idx].datetime).getTime() === (events[ptr].datetime).getTime()
      ) {
        matchedEvents.push(events[ptr])
        ptr -= 1
      }
      // check events after
      ptr = idx + 1

      while (
        ptr < events.length &&
        (events[idx].datetime).getTime() === (events[ptr].datetime).getTime()
      ) {
        matchedEvents.push(events[ptr])
        ptr += 1
      }
    } else { // Map...
      const std = { ...selected }
      delete std.sources
      Object.values(std).forEach(ev => matchedEvents.push(ev))
    }

    this.props.actions.updateSelected(matchedEvents)
  }

  getCategoryColor (category) {
    if (!this.props.features.USE_CATEGORIES) { return colors.fallbackEventColor }

    const cat = this.props.ui.style.categories[category]
    if (cat) {
      return cat
    } else {
      return this.props.ui.style.categories['default']
    }
  }

  getNarrativeLinks (event) {
    const narrative = this.props.domain.narratives.find(nv => nv.id === event.narrative)
    if (narrative) return narrative.byId[event.id]
    return null
  }

  setNarrative (narrative) {
    // only handleSelect if narrative is not null
    console.log(narrative)
    if (narrative) {
      this.handleSelect([ narrative.steps[0] ])
    }
    this.props.actions.updateNarrative(narrative)
  }

  setNarrativeFromFilters (withSteps) {
    const { app, domain } = this.props
    let activeFilters = app.filters.filters

    if (activeFilters.length === 0) {
      alert('No filters selected, cant narrativise')
      return
    }

    if (this.props.features.USE_FILTER_DESCRIPTIONS) {
      activeFilters = activeFilters.reduce((acc, vl) => {
        acc.push({
          name: vl,
          description: findDescriptionInFilterTree(vl, domain.filters)
        })
        return acc
      }, [])
    } else {
      activeFilters = activeFilters.map(f => ({ name: f }))
    }

    const evs = domain.events.filter(ev => {
      let hasOne = false
      // add event if it has at least one matching filter
      for (let i = 0; i < activeFilters.length; i++) {
        if (ev.filters.includes(activeFilters[i].name)) {
          hasOne = true
          break
        }
      }
      if (hasOne) return true
      return false
    })

    const name = activeFilters.map(f => f.name).join('-')
    const desc = activeFilters.map(f => f.description).join('\n\n')
    this.setNarrative({
      id: name,
      label: name,
      description: desc,
      withLines: withSteps,
      steps: evs.map(insetSourceFrom(domain.sources))
    })
  }

  selectNarrativeStep (idx) {
    const { narrative } = this.props.app
    if (narrative === null) return

    if (idx < narrative.steps.length && idx >= 0) {
      const step = narrative.steps[idx]

      this.handleSelect([step])
      this.props.actions.selectNarrativeIdx(idx)
    }
  }

  onKeyDown (e) {
    const { narrative, selected } = this.props.app
    const { events } = this.props.domain
    const prev = idx => {
      if (narrative === null) {
        this.handleSelect(events[idx - 1], 0)
      } else {
        this.selectNarrativeStep(this.props.app.narrativeState.current - 1)
      }
    }
    const next = idx => {
      if (narrative === null) {
        this.handleSelect(events[idx + 1], 0)
      } else {
        this.selectNarrativeStep(this.props.app.narrativeState.current + 1)
      }
    }
    if (selected.length > 0) {
      const ev = selected[selected.length - 1]
      const idx = this.findEventIdx(ev)
      switch (e.keyCode) {
        case 37: // left arrow
        case 38: // up arrow
          if (idx <= 0) return
          prev(idx)
          break
        case 39: // right arrow
        case 40: // down arrow
          if (idx < 0 || idx >= this.props.domain.length - 1) return
          next(idx)
          break
        default:
      }
    }
  }
  render () {
    const { actions, app, domain, ui, features } = this.props

    if (isMobile || window.innerWidth < 600) {
      const msg = 'This platform is not suitable for mobile. Please re-visit the site on a device with a larger screen.'
      return (
        <div>
          {features.USE_COVER ? (
            <StaticPage showing={app.flags.isCover}>
              {/* enable USE_COVER in config.js features, and customise your header */}
              {/* pass 'actions.toggleCover' as a prop to your custom header */}
              <TemplateCover showAppHandler={() => {
                /* eslint-disable no-undef */
                alert(msg)
                /* eslint-enable no-undef */
              }} />
            </StaticPage>
          ) : <div className='fixedTooSmallMessage'>{msg}</div>}
        </div>
      )
    }

    return (
      <div >
        <Toolbar
          isNarrative={!!app.narrative}
          methods={{
            onTitle: actions.toggleCover,
            onSelectFilter: filter => actions.toggleFilter('filters', filter),
            onCategoryFilter: category => actions.toggleFilter('categories', category),
            onSelectNarrative: this.setNarrative
          }}
        />
        <Map
          onKeyDown={this.onKeyDown}
          methods={{
            onSelectNarrative: this.setNarrative,
            getCategoryColor: this.getCategoryColor,
            onSelect: (app.narrative ? this.selectNarrativeStep : (ev => this.handleSelect(ev, 1)))
          }}
        />
        <Timeline
          onKeyDown={this.onKeyDown}
          methods={{
            onSelect: ev => this.handleSelect(ev, 0),
            onUpdateTimerange: actions.updateTimeRange,
            getCategoryColor: this.getCategoryColor
          }}
        />
        <CardStack
          timelineDims={app.timeline.dimensions}
          onViewSource={this.handleViewSource}
          onSelect={app.narrative ? this.selectNarrativeStep : this.handleSelect}
          onHighlight={this.handleHighlight}
          onToggleCardstack={() => actions.updateSelected([])}
          getNarrativeLinks={event => this.getNarrativeLinks(event)}
          getCategoryColor={this.getCategoryColor}
        />
        <StateOptions
          showing={features.FILTERS_AS_NARRATIVES && !app.narrative && app.filters.filters.length > 0}
          timelineDims={app.timeline.dimensions}
          onClickHandler={this.setNarrativeFromFilters}
        />
        <NarrativeControls
          narrative={app.narrative ? {
            ...app.narrative,
            current: app.narrativeState.current
          } : null}
          methods={{
            onNext: () => this.selectNarrativeStep(this.props.app.narrativeState.current + 1),
            onPrev: () => this.selectNarrativeStep(this.props.app.narrativeState.current - 1),
            onSelectNarrative: this.setNarrative
          }}
        />
        <InfoPopUp
          ui={ui}
          app={app}
          methods={{
            onClose: actions.toggleInfoPopup
          }}
        />
        <Notification
          isNotification={app.flags.isNotification}
          notifications={domain.notifications}
          onToggle={actions.markNotificationsRead}
        />
        {app.source ? (
          <MediaOverlay
            source={app.source}
            onCancel={() => {
              actions.updateSource(null)
            }
            }
          />
        ) : null}
        <LoadingOverlay
          isLoading={app.loading || app.flags.isFetchingDomain}
          ui={app.flags.isFetchingDomain}
          language={app.language}
        />
        {features.USE_COVER && (
          <StaticPage showing={app.flags.isCover}>
            {/* enable USE_COVER in config.js features, and customise your header */}
            {/* pass 'actions.toggleCover' as a prop to your custom header */}
            <TemplateCover showing={app.flags.isCover} showAppHandler={actions.toggleCover} />
          </StaticPage>
        )}
      </div>
    )
  }
}

function mapDispatchToProps (dispatch) {
  return {
    actions: bindActionCreators(actions, dispatch)
  }
}

export default connect(
  state => state,
  mapDispatchToProps
)(Dashboard)