import cs from 'classnames'
import { observable } from 'mobx'
import { observer } from 'mobx-react'
import PropTypes from 'prop-types'
import React, { Component } from 'react'
import { findDOMNode } from 'react-dom'
import { Reporter } from '@packages/reporter'
import { $ } from '@packages/driver'
import {
  Message,
  errorMessages,
  StudioModals,
  Header,
  SpecList,
} from '@packages/runner-shared'
import styles from '@packages/runner-shared/src/styles.module.scss'

import util from '../lib/util'

import Iframes from '../iframe/iframes'
import Resizer from './resizer'

/**
 * This is a feature flag. If true, all the integration specs
 * will be rendered inline to the left of te command log, similar to the component testing runner.
 */
// If you change this, make sure to update it in app.scss, too.
export const SPEC_LIST_WIDTH = 250

const removeRelativeRegexp = /\.\.\//gi

@observer
class App extends Component {
  @observable isReporterResizing = false
  @observable isSpecListResizing = false
  searchRef = React.createRef()

  render () {
    /**
     * @type {Cypress.Cypress['spec']}
     */
    const spec = this.props.config.spec

    const NO_COMMAND_LOG = this.props.config.env && this.props.config.env.NO_COMMAND_LOG

    return (
      <div className={cs({
        'is-reporter-resizing': this.isReporterResizing,
        'is-reporter-sized': this.props.state.reporterWidth != null,
      })}>
        {Boolean(NO_COMMAND_LOG) || (
          Boolean(this.props.state.useInlineSpecList) &&
            <>
              <div
                className='spec-list-wrap'
                style={{ width: this.props.state.specListWidth }}
              >
                <SpecList
                  searchRef={this.searchRef}
                  specs={this.props.state.specs}
                  className={cs(styles.specsList, 'spec-list')}
                  selectedFile={this.props.state.spec ? this.props.state.spec.relative : undefined}
                  onFileClick={this._runSpec}
                />
              </div>

              <Resizer
                style={{ left: this.props.state.specListWidth, zIndex: 10 }}
                maxWidth={this.props.state.windowWidth - SPEC_LIST_WIDTH}
                onResizeStart={this._onSpecListResizeStart}
                onResize={this._onSpecListResize}
                onResizeEnd={this._onSpecListResizeEnd}
              />
            </>
        )}

        <div
          ref='reporterWrap'
          className='reporter-wrap'
          style={{
            width: this.props.state.reporterWidth,
            left: this.props.state.specListWidth,
          }}
        >
          {Boolean(NO_COMMAND_LOG) || <Reporter
            runner={this.props.eventManager.reporterBus}
            spec={spec}
            autoScrollingEnabled={this.props.config.state.autoScrollingEnabled}
            error={errorMessages.reporterError(this.props.state.scriptError, spec.relative)}
            experimentalStudioEnabled={this.props.config.experimentalStudio}
          />}
        </div>
        <div
          ref='container'
          className='runner container'
          style={{
            left: this.props.state.absoluteReporterWidth +
            this.props.state.specListWidth,
          }}
        >
          <Header ref='header' runner='e2e' {...this.props} />
          <Iframes ref='iframes' {...this.props} />
          <Message ref='message' state={this.props.state} />
          {this.props.children}
        </div>
        <Resizer
          style={{ left: this.props.state.absoluteReporterWidth + this.props.state.specListWidth }}
          maxWidth={this.props.state.windowWidth}
          onResizeStart={this._onReporterResizeStart}
          onResize={this._onReporterResize}
          onResizeEnd={this._onReporterResizeEnd}
        />
        <StudioModals />
        {/* these pixels help ensure the browser has painted when taking a screenshot */}
        <div ref='screenshotHelperPixels' className='screenshot-helper-pixels'>
          <div /><div /><div /><div /><div /><div />
        </div>
      </div>
    )
  }

  componentDidMount () {
    this._monitorWindowResize()
    this._handleScreenshots()
  }

  _runSpec = (path) => {
    // We request an absolute path from the dev server but the spec list displays relative paths
    // For this reason to match the spec we remove leading relative paths. Eg ../../foo.js -> foo.js.
    const filePath = path.replace(removeRelativeRegexp, '')
    const selectedSpec = this.props.state.specs.find((spec) => spec.absolute.includes(filePath))

    if (!selectedSpec) {
      throw Error(`Could not find spec matching ${path}.`)
    }

    this.props.state.setSingleSpec(selectedSpec)
  }

  _monitorWindowResize () {
    const state = this.props.state
    const win = this.props.window

    const $header = $(findDOMNode(this.refs.header))
    const $reporterWrap = $(this.refs.reporterWrap)

    this._onWindowResize = () => {
      state.updateWindowDimensions({
        windowWidth: win.innerWidth,
        windowHeight: win.innerHeight,
        reporterWidth: $reporterWrap.outerWidth(),
        headerHeight: $header.outerHeight(),
      })
    }

    $(win).on('resize', this._onWindowResize).trigger('resize')
  }

  _onSpecListResizeStart = () => {
    this.isSpecListResizing = true
  }

  _onReporterResizeStart = () => {
    this.isReporterResizing = true
  }

  _onSpecListResize = (specListWidth) => {
    this.props.state.specListWidth = specListWidth
    this.props.state.absoluteSpecListWidth = specListWidth

    const $header = $(findDOMNode(this.refs.header))

    this.props.state.updateWindowDimensions({
      headerHeight: $header.outerHeight(),
    })
  }

  _onReporterResize = (reporterWidth) => {
    this.props.state.reporterWidth = reporterWidth - this.props.state.specListWidth
    this.props.state.absoluteReporterWidth = reporterWidth - this.props.state.specListWidth

    const $header = $(findDOMNode(this.refs.header))

    this.props.state.updateWindowDimensions({
      headerHeight: $header.outerHeight(),
    })
  }

  _onReporterResizeEnd = () => {
    this.isReporterResizing = false
    this.props.eventManager.saveState({
      reporterWidth: this.props.state.reporterWidth,
    })
  }

  _onSpecListResizeEnd = () => {
    this.isSpecListResizing = false
    this.props.eventManager.saveState({
      specListWidth: this.props.state.specListWidth,
    })
  }

  _handleScreenshots () {
    const containerNode = findDOMNode(this.refs.container)
    const reporterNode = this.refs.reporterWrap
    const headerNode = findDOMNode(this.refs.header)
    const iframesNode = findDOMNode(this.refs.iframes)
    const iframesSizeNode = findDOMNode(this.refs.iframes.getSizeContainer())
    const screenshotHelperPixels = this.refs.screenshotHelperPixels

    let prevAttrs = {}
    let screenshotting = false

    const { eventManager } = this.props

    eventManager.on('before:screenshot', (config) => {
      if (!config.appOnly) return

      screenshotting = true

      prevAttrs = {
        config,
        top: iframesNode.style.top,
        marginLeft: iframesSizeNode.style.marginLeft,
        width: iframesSizeNode.style.width,
        height: iframesSizeNode.style.height,
        transform: iframesSizeNode.style.transform,
        left: containerNode.style.left,
      }

      const messageNode = findDOMNode(this.refs.message)

      if (messageNode) {
        messageNode.style.display = 'none'
      }

      reporterNode.style.display = 'none'
      headerNode.style.display = 'none'

      iframesNode.style.top = 0
      iframesNode.style.backgroundColor = 'black'
      iframesSizeNode.style.marginLeft = 0

      containerNode.style.left = 0
      iframesNode.style.left = 0

      containerNode.className += ' screenshotting'

      if (!config.scale) {
        iframesSizeNode.style.width = `${Math.min(window.innerWidth, iframesSizeNode.offsetWidth)}px`
        iframesSizeNode.style.height = `${Math.min(window.innerHeight, iframesSizeNode.offsetHeight)}px`
        iframesSizeNode.style.transform = null
      }

      screenshotHelperPixels.style.display = 'none'
    })

    const afterScreenshot = (config) => {
      if (!config.appOnly) return

      screenshotting = false

      screenshotHelperPixels.style.display = 'block'

      containerNode.className = containerNode.className.replace(' screenshotting', '')
      containerNode.style.left = prevAttrs.left
      iframesNode.style.left = prevAttrs.left

      iframesNode.style.top = prevAttrs.top
      iframesNode.style.backgroundColor = null
      iframesSizeNode.style.marginLeft = prevAttrs.marginLeft

      reporterNode.style.display = null
      headerNode.style.display = null

      const messageNode = findDOMNode(this.refs.message)

      if (messageNode) {
        messageNode.style.display = null
      }

      if (!config.scale) {
        iframesSizeNode.style.transform = prevAttrs.transform
        iframesSizeNode.style.width = prevAttrs.width
        iframesSizeNode.style.height = prevAttrs.height
      }

      prevAttrs = {}
    }

    eventManager.on('after:screenshot', afterScreenshot)

    eventManager.on('run:start', () => {
      if (screenshotting) {
        afterScreenshot(prevAttrs.config)
      }
    })
  }

  componentWillUnmount () {
    $(this.props.window).off('resize', this._onWindowResize)
  }
}

App.defaultProps = {
  window,
  util,
}

App.propTypes = {
  config: PropTypes.shape({
    browsers: PropTypes.arrayOf(PropTypes.shape({
      name: PropTypes.string.isRequired,
      majorVersion: PropTypes.oneOfType([
        PropTypes.string,
        PropTypes.number,
      ]),
      version: PropTypes.string.isRequired,
    })).isRequired,
    integrationFolder: PropTypes.string.isRequired,
    numTestsKeptInMemory: PropTypes.number.isRequired,
    projectName: PropTypes.string.isRequired,
    viewportHeight: PropTypes.number.isRequired,
    viewportWidth: PropTypes.number.isRequired,
  }).isRequired,
  eventManager: PropTypes.shape({
    notifyRunningSpec: PropTypes.func.isRequired,
    reporterBus: PropTypes.shape({
      emit: PropTypes.func.isRequired,
      on: PropTypes.func.isRequired,
    }).isRequired,
  }).isRequired,
}

export default App