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 uploadActions from './upload.actions'

import Ticks from './ticks.component'

import * as constants from '../constants'

class Timeline extends Component {
  constructor(props){
    super(props)
    this.canvasRef = React.createRef()
    this.handleKeydown = this.handleKeydown.bind(this)
  }
  componentDidMount() {
    this.bind()
    this.resize()
    this.draw()
  }
  componentDidUpdate() {
    this.draw()
  }
  componentWillUnmount() {
    this.unbind()
  }
  bind() {
    document.addEventListener('keydown', this.handleKeydown)
  }
  unbind() {
    document.removeEventListener('keydown', this.handleKeydown)
  }
  handleKeydown(e) {
    // console.log(e.shiftKey, e.keyCode)
  }
  resize() {
    const canvas = this.canvasRef.current
    canvas.width = window.innerWidth
    canvas.height = constants.DEFAULT_HEIGHT
  }
  draw() {
    const canvas = this.canvasRef.current
    const ctx = canvas.getContext('2d')
    const w = window.innerWidth
    this.clearCanvas(ctx, w)
  }
  clearCanvas(ctx, w) {  
    const h = constants.WAVEFORM_HEIGHT
    ctx.clearRect(0, 0, w, h)
    ctx.fillStyle = 'rgba(0,0,0,0.5)'
    ctx.fillRect(0, 0, w, h)
    ctx.fillStyle = 'rgba(64,128,192,0.5)'
  }
  render() {
    return (
      <div className='timeline'>
        <canvas ref={this.canvasRef} />
        <Ticks timeline={this.props.timeline} />
      </div>
    )
  }
}

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

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

export default connect(mapStateToProps, mapDispatchToProps)(Timeline)