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

import { Tabs, TabPanel } from 'react-tabs'
import FilterListPanel from './FilterListPanel'
import CategoriesListPanel from './CategoriesListPanel'
import BottomActions from './BottomActions'
import copy from '../../common/data/copy.json'
import { trimAndEllipse, getImmediateFilterParent, getFilterSiblings } from '../../common/utilities.js'

class Toolbar extends React.Component {
  constructor (props) {
    super(props)
    this.onSelectFilter = this.onSelectFilter.bind(this)
    this.state = { _selected: -1 }
  }

  selectTab (selected) {
    const _selected = (this.state._selected === selected) ? -1 : selected
    this.setState({ _selected })
  }

  onSelectFilter (key, matchingKeys) {
    const { filters, activeFilters, coloringSet, maxNumOfColors } = this.props

    const parent = getImmediateFilterParent(filters, key)
    const isTurningOff = activeFilters.includes(key)

    if (!isTurningOff) {
      const flattenedColoringSet = coloringSet.flatMap(f => f)
      const newColoringSet = matchingKeys.filter(k => flattenedColoringSet.indexOf(k) === -1)
      const updatedColoringSet = [...coloringSet, newColoringSet]

      if (updatedColoringSet.length <= maxNumOfColors) {
        this.props.actions.updateColoringSet(updatedColoringSet)
      }
    } else {
      const newColoringSets = coloringSet.map(set => (
        set.filter(s => {
          return !matchingKeys.includes(s)
        })
      ))
      this.props.actions.updateColoringSet(newColoringSets.filter(item => item.length !== 0))
    }

    if (parent) {
      const parentOn = activeFilters.includes(parent)
      if (parentOn) {
        const siblings = getFilterSiblings(filters, parent, key)
        let siblingsOff = true
        for (let sibling of siblings) {
          if (activeFilters.includes(sibling)) {
            siblingsOff = false
            break
          }
        }

        if (siblingsOff && isTurningOff) {
          matchingKeys.push(parent)
        }
      }
    }
    this.props.methods.onSelectFilter(matchingKeys)
  }

  renderClosePanel () {
    return (
      <div className='panel-header' onClick={() => this.selectTab(-1)}>
        <div className='caret' />
      </div>
    )
  }

  goToNarrative (narrative) {
    this.selectTab(-1) // set all unselected within this component
    this.props.methods.onSelectNarrative(narrative)
  }

  renderToolbarNarrativePanel () {
    return (
      <TabPanel>
        <h2>{copy[this.props.language].toolbar.narrative_panel_title}</h2>
        <p>{copy[this.props.language].toolbar.narrative_summary}</p>
        {this.props.narratives.map((narr) => {
          return (
            <div className='panel-action action'>
              <button onClick={() => { this.goToNarrative(narr) }}>
                <p>{narr.id}</p>
                <p><small>{trimAndEllipse(narr.desc, 120)}</small></p>
              </button>
            </div>
          )
        })}
      </TabPanel>
    )
  }

  renderToolbarCategoriesPanel () {
    if (this.props.features.CATEGORIES_AS_FILTERS) {
      return (
        <TabPanel>
          <CategoriesListPanel
            categories={this.props.categories}
            activeCategories={this.props.activeCategories}
            onCategoryFilter={this.props.methods.onCategoryFilter}
            language={this.props.language}
          />
        </TabPanel>
      )
    }
  }

  renderToolbarFilterPanel () {
    return (
      <TabPanel>
        <FilterListPanel
          filters={this.props.filters}
          activeFilters={this.props.activeFilters}
          onSelectFilter={this.onSelectFilter}
          language={this.props.language}
          coloringSet={this.props.coloringSet}
          filterColors={this.props.filterColors}
        />
      </TabPanel>
    )
  }

  renderToolbarTab (_selected, label, iconKey) {
    const isActive = (this.state._selected === _selected)
    let classes = (isActive) ? 'toolbar-tab active' : 'toolbar-tab'

    return (
      <div className={classes} onClick={() => { this.selectTab(_selected) }}>
        <i className='material-icons'>{iconKey}</i>
        <div className='tab-caption'>{label}</div>
      </div>
    )
  }

  renderToolbarPanels () {
    const { features, narratives } = this.props
    let classes = (this.state._selected >= 0) ? 'toolbar-panels' : 'toolbar-panels folded'
    return (
      <div className={classes}>
        {this.renderClosePanel()}
        <Tabs selectedIndex={this.state._selected}>
          {narratives && narratives.length !== 0 ? this.renderToolbarNarrativePanel() : null}
          {features.CATEGORIES_AS_FILTERS ? this.renderToolbarCategoriesPanel() : null}
          {features.USE_ASSOCIATIONS ? this.renderToolbarFilterPanel() : null}
        </Tabs>
      </div>
    )
  }

  renderToolbarNavs () {
    if (this.props.narratives) {
      return this.props.narratives.map((nar, idx) => {
        const isActive = (idx === this.state._selected)

        let classes = (isActive) ? 'toolbar-tab active' : 'toolbar-tab'

        return (
          <div className={classes} onClick={() => { this.selectTab(idx) }}>
            <div className='tab-caption'>{nar.label}</div>
          </div>
        )
      })
    }
    return null
  }

  renderToolbarTabs () {
    const { features, narratives } = this.props
    const narrativesExist = narratives && narratives.length !== 0
    let title = copy[this.props.language].toolbar.title
    if (process.env.display_title) title = process.env.display_title
    const narrativesLabel = copy[this.props.language].toolbar.narratives_label
    const filtersLabel = copy[this.props.language].toolbar.filters_label
    const categoriesLabel = 'Categories' // TODO:

    const narrativesIdx = 0
    const categoriesIdx = narrativesExist ? 1 : 0
    const filtersIdx = (narrativesExist && features.CATEGORIES_AS_FILTERS) ? 2 : (
      narrativesExist || features.CATEGORIES_AS_FILTERS ? 1 : 0
    )
    return (
      <div className='toolbar'>
        <div className='toolbar-header'onClick={this.props.methods.onTitle}><p>{title}</p></div>
        <div className='toolbar-tabs'>
          {narrativesExist ? this.renderToolbarTab(narrativesIdx, narrativesLabel, 'timeline') : null}
          {features.CATEGORIES_AS_FILTERS ? this.renderToolbarTab(categoriesIdx, categoriesLabel, 'widgets') : null}
          {features.USE_ASSOCIATIONS ? this.renderToolbarTab(filtersIdx, filtersLabel, 'filter_list') : null}
        </div>
        <BottomActions
          info={{
            enabled: this.props.infoShowing,
            toggle: this.props.actions.toggleInfoPopup
          }}
          sites={{
            enabled: this.props.sitesShowing,
            toggle: this.props.actions.toggleSites
          }}
          cover={{
            toggle: this.props.actions.toggleCover
          }}
          features={this.props.features}
        />
      </div>
    )
  }

  render () {
    const { isNarrative } = this.props

    return (
      <div id='toolbar-wrapper' className={`toolbar-wrapper ${(isNarrative) ? 'narrative-mode' : ''}`}>
        {this.renderToolbarTabs()}
        {this.renderToolbarPanels()}
      </div>
    )
  }
}

function mapStateToProps (state) {
  return {
    filters: selectors.getFilters(state),
    categories: selectors.getCategories(state),
    narratives: selectors.selectNarratives(state),
    language: state.app.language,
    activeFilters: selectors.getActiveFilters(state),
    activeCategories: selectors.getActiveCategories(state),
    viewFilters: state.app.associations.views,
    narrative: state.app.associations.narrative,
    sitesShowing: state.app.flags.isShowingSites,
    infoShowing: state.app.flags.isInfopopup,
    coloringSet: state.app.associations.coloringSet,
    maxNumOfColors: state.ui.coloring.maxNumOfColors,
    filterColors: state.ui.coloring.colors,
    features: selectors.getFeatures(state)
  }
}

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

export default connect(mapStateToProps, mapDispatchToProps)(Toolbar)