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 Waveform from './waveform.component'
import Ticks from './ticks.component'

import { ZOOM_STEPS } from '../constants'
import { clamp } from '../../../util'

class Timeline extends Component {
  constructor(props){
    super(props)
    this.handleKeydown = this.handleKeydown.bind(this)
    this.handleWheel = this.handleWheel.bind(this)
  }
  componentDidMount() {
    this.bind()
  }
  componentWillUnmount() {
    this.unbind()
  }
  bind() {
    document.addEventListener('keydown', this.handleKeydown)
  }
  unbind() {
    document.removeEventListener('keydown', this.handleKeydown)
  }
  handleKeydown(e) {
    if (e.shiftKey && e.keyCode === 189) {
      actions.align.setZoom(this.props.timeline.zoom - 1)
    } else if (e.shiftKey && e.keyCode === 187) {
      actions.align.setZoom(this.props.timeline.zoom + 1)
    }
  }
  handleWheel(e) {
    let { start_ts, zoom, duration } = this.props.timeline
    let secondsPerPixel = ZOOM_STEPS[zoom] / 10 // 0.1 sec / step
    let widthTimeDuration = window.innerWidth * secondsPerPixel // secs per pixel

    start_ts = clamp(start_ts + e.deltaY * ZOOM_STEPS[zoom], 0, duration - widthTimeDuration / 2)
    actions.align.setScrollPosition(start_ts)
  }
  render() {
    return (
      <div className='timeline' onWheel={this.handleWheel}>
        <Waveform />
        <Ticks timeline={this.props.timeline} />
      </div>
    )
  }
}

const mapStateToProps = state => ({
  timeline: state.align.timeline,
})

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

export default connect(mapStateToProps, mapDispatchToProps)(Timeline)