import React, { Component } from 'react'
// import { Link } from 'react-router-dom'
import { bindActionCreators } from 'redux'
import { connect } from 'react-redux'

import actions from '../../../actions'
// import * as alignActions from '../align.actions'

import Annotations from '../containers/annotations.container'
import Waveform from '../components/timeline/waveform.component'
import Ticks from '../components/timeline/ticks.component'
import Cursor from '../components/timeline/cursor.component'
import PlayButton from '../components/timeline/playButton.component'
import PlayCursor from '../components/timeline/playCursor.component'

import { WAVEFORM_SIZE, ZOOM_STEPS } from '../constants'
import { clamp } from '../../../util'
import { positionToTime } from '../align.util'

class Timeline extends Component {
  constructor(props){
    super(props)
    this.handleKeydown = this.handleKeydown.bind(this)
    this.handleMouseMove = this.handleMouseMove.bind(this)
    this.handleWheel = this.handleWheel.bind(this)
    this.handleContainerClick = this.handleContainerClick.bind(this)
    this.handleTimelineClick = this.handleTimelineClick.bind(this)
  }
  componentDidMount() {
    this.bind()
  }
  componentWillUnmount() {
    this.unbind()
  }
  shouldComponentUpdate(nextProps) {
    return (
      nextProps.timeline !== this.props.timeline ||
      nextProps.annotation !== this.props.annotation
    )
  }
  bind() {
    document.addEventListener('keydown', this.handleKeydown)
  }
  unbind() {
    document.removeEventListener('keydown', this.handleKeydown)
  }
  handleKeydown(e) {
    if (document.activeElement !== document.body) {
      return
    }
    // console.log(e.keyCode)
    if (e.shiftKey) {
      switch (e.keyCode) {
        case 187: // plus
          actions.align.setZoom(this.props.timeline.zoom - 1)
          break
        case 189: // minus
          actions.align.setZoom(this.props.timeline.zoom + 1)
          break
      }
    } else {
      // console.log(e.keyCode)
      switch (e.keyCode) {
        case 27: // escape
          actions.align.hideAnnotationForm()
          break
        case 65: // A - add
          e.preventDefault()
          actions.align.showNewAnnotationForm(this.props.audio.play_ts, this.props.text)
          break
        case 32: // spacebar
          actions.audio.toggle()
          break
        case 38: // up
          actions.audio.jump(- ZOOM_STEPS[this.props.timeline.zoom] * 0.1)
          break
        case 40: // down
          actions.audio.jump(ZOOM_STEPS[this.props.timeline.zoom] * 0.1)
          break
      }
    }
  }
  handleWheel(e) {
    let { start_ts, zoom, duration } = this.props.timeline
    let { deltaY } = e
    let secondsPerPixel = ZOOM_STEPS[zoom] * 0.1 // 0.1 sec / step
    let widthTimeDuration = window.innerHeight * secondsPerPixel // secs per pixel
    start_ts += Math.round((deltaY / 8) * ZOOM_STEPS[zoom])
    start_ts = clamp(start_ts, 0, Math.max(0, duration - widthTimeDuration / 2))
    if (e.shiftKey) {
      if (Math.abs(deltaY) < 2) return
      if (e.deltaY > 0) {
        actions.align.throttledSetZoom(this.props.timeline.zoom + 1)
      } else {
        actions.align.throttledSetZoom(this.props.timeline.zoom - 1)
      }
    } else if (e.altKey) {
      actions.audio.jump(e.deltaY * ZOOM_STEPS[zoom])
    } else {
      actions.align.setScrollPosition(start_ts)
    }
  }
  handleMouseMove(e) {
    const cursor_ts = positionToTime(e.pageY, this.props.timeline)
    actions.align.setCursor(cursor_ts)
  }
  handleContainerClick(e) {
    console.log('container click')
    actions.align.clearSelectedAnnotation()
  }
  handleTimelineClick(e) {
    const play_ts = positionToTime(e.pageY, this.props.timeline)
    if (e.pageX < WAVEFORM_SIZE * 0.67) {
      actions.audio.seek(play_ts)      
    } else {
      actions.align.showNewAnnotationForm(play_ts, this.props.text)
    }
  }
  render() {
    return (
      <div
        className='timeline'
        onClick={this.handleContainerClick}
        onWheel={this.handleWheel}
        onMouseMove={this.handleMouseMove}
      >
        <div className='timelineColumn'>
          <Waveform onClick={this.handleTimelineClick} />
          <Ticks timeline={this.props.timeline} />
          <Cursor timeline={this.props.timeline} annotation={this.props.annotation} />
        </div>
        <Annotations timeline={this.props.timeline} />
        <PlayCursor />
        <PlayButton />
      </div>
    )
  }
}

const mapStateToProps = state => ({
  timeline: state.align.timeline,
  annotation: state.align.annotation,
  audio: state.audio,
  text: state.site.text,
})

const mapDispatchToProps = dispatch => ({
  // alignActions: bindActionCreators({ ...alignActions }, dispatch),
})

export default connect(mapStateToProps, mapDispatchToProps)(Timeline)