import React, {Component} from 'react'
import styled from 'styled-components'
import {position} from 'polished'
import Button from 'components/utils/button'
import auto_bind from 'common/auto_bind'
import {color, acceleration, desceleration} from 'common/styles'

const modals = []
let after_update = () => {}

export function add_modal(modal) {
  modals.push(modal)
  after_update()
}

const dismissers = []

export function dismiss_front_modal() {
  const dismiss = dismissers.pop()
  dismiss()
}

function dismiss_front_modal_immediately() {
  modals.pop()
  after_update()
}

export default class Modals extends Component {
  constructor(props) {
    super(props)
    auto_bind(this)
  }

  componentDidMount() {
    after_update = this.after_update
  }

  componentWillUpdate() {
    after_update = this.after_update
  }

  after_update() {
    this.forceUpdate()
  }

  render_modal(modal, id) {
    return <Modal key={id} component={modal} />
  }

  render() {
    if (modals.length) {
      return (
        <Frame>
          {modals.map(this.render_modal)}
        </Frame>
      )
    }
    return null
  }
}

class Modal extends Component {
  constructor(props) {
    super(props)
    this.state = {
      mounted: false,
    }
    auto_bind(this)
  }

  componentDidMount() {
    dismissers.push(this.dismiss)
    setTimeout(() => this.setState({mounted: true}), 10)
  }

  dismiss() {
    setTimeout(dismiss_front_modal_immediately, 400)
    this.setState({mounted: false})
  }

  render() {
    const {mounted} = this.state
    const {component: Content} = this.props
    return (
      <Container mounted={mounted}>
        <Header>
          <Button onClick={dismiss_front_modal} back>
            Retour
          </Button>
        </Header>
        <ContentContainer>
          <Content />
        </ContentContainer>
      </Container>
    )
  }
}

const Frame = styled.div`
  ${position('absolute', '0', '0', '0', '0')}
`
const Container = styled.div`
  ${position('absolute', '0', '0', '0', '0')}
  background-color: ${color('black', 'translucent')};
  overflow: scroll;
  transform: translate(0, ${({mounted}) => mounted ? '0' : '100%'});
  transition: transform 400ms ${({mounted}) => mounted ? desceleration : acceleration};
  box-shadow: 0 0 3px ${color('black', 'normal', 0.25)};

  & > * {
    margin: 0 40px 40px 40px;
  }
`
const Header = styled.div`
  margin-top: 40px;
`
const ContentContainer = styled.div`

`