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import React, { Component } from 'react'
import { ZOOM_STEPS, ZOOM_LABEL_STEPS, ZOOM_TICK_STEPS, INNER_HEIGHT } from 'app/constants'
import { timestamp } from 'app/utils'
export default class Ticks extends Component {
render() {
let { start_ts, zoom, duration } = this.props.timeline
let secondsPerPixel = ZOOM_STEPS[zoom] * 0.1 // 0.1 sec / step
let widthTimeDuration = INNER_HEIGHT * secondsPerPixel // secs per pixel
let timeMin = start_ts
let timeMax = Math.min(start_ts + widthTimeDuration, duration)
let timeWidth = timeMax - timeMin
let pixelMin = timeMin / secondsPerPixel
let secondsPerLabel = ZOOM_LABEL_STEPS[zoom] // secs
let pixelsPerLabel = secondsPerLabel / secondsPerPixel
let secondsPerTick = ZOOM_TICK_STEPS[zoom]
let pixelsPerTick = secondsPerTick / secondsPerPixel
let startOffset = pixelsPerLabel - (pixelMin % pixelsPerLabel)
let startTiming = (pixelMin + startOffset) * secondsPerPixel
let labelCount = Math.ceil(INNER_HEIGHT / pixelsPerLabel) + 1
let offset, timing, tickLabels = [], ticks = []
for (var i = -1; i < labelCount; i++) {
offset = i * pixelsPerLabel + startOffset
if (offset > INNER_HEIGHT) continue
timing = i * secondsPerLabel + startTiming
if (timing > duration) {
break
}
tickLabels.push(
<div className='tickLabel' key={"tickLabel_" + i}
style={{
top: Math.floor(offset)
}}>
{timestamp(timing)}
</div>
)
}
let durationOffset = duration / secondsPerPixel - pixelMin
if (timing > duration) {
tickLabels.push(
<div className='tickLabel tickLabelTotal' key={"tickLabel_total"}
style={{
top: durationOffset
}}>
{timestamp(duration, 1)}
</div>
)
ticks.push(
<div className='tick' key={"tick_total"}
style={{
top: Math.floor(durationOffset),
}}
/>
)
}
let tickCount = Math.ceil(INNER_HEIGHT / pixelsPerTick) + 6
for (var i = 0; i < tickCount; i += 1) {
offset = i * pixelsPerTick + startOffset - pixelsPerLabel
if (offset > durationOffset) {
break
}
ticks.push(
<div className='tick' key={"tick_" + i}
style={{
top: Math.floor(offset),
}}
/>
)
}
// console.log(ticks.length)
return (
<div className='ticks'>
{ticks}
{tickLabels}
</div>
)
}
}
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