import React from 'react'
import PropTypes from 'prop-types'
import data from '../data'

import { getData, getSanitizedData, unifiedToNative } from '../utils'

const SHEET_COLUMNS = 49

const _getPosition = (props) => {
  var { sheet_x, sheet_y } = _getData(props),
      multiply = 100 / (SHEET_COLUMNS - 1)

  return `${multiply * sheet_x}% ${multiply * sheet_y}%`
}

const _getData = (props) => {
  var { emoji, skin, set } = props
  return getData(emoji, skin, set)
}

const _getSanitizedData = (props) => {
  var { emoji, skin, set } = props
  return getSanitizedData(emoji, skin, set)
}

const _handleClick = (e, props) => {
  if (!props.onClick) { return }
  var { onClick } = props,
      emoji = _getSanitizedData(props)

  onClick(emoji, e)
}

const _handleOver = (e, props) => {
  if (!props.onOver) { return }
  var { onOver } = props,
      emoji = _getSanitizedData(props)

  onOver(emoji, e)
}

const _handleLeave = (e, props) => {
  if (!props.onLeave) { return }
  var { onLeave } = props,
      emoji = _getSanitizedData(props)

  onLeave(emoji, e)
}

const Emoji = (props) => {
  for (let k in Emoji.defaultProps) {
    if (props[k] == undefined && Emoji.defaultProps[k] != undefined) {
      props[k] = Emoji.defaultProps[k]
    }
  }

  var { unified, custom, short_names, imageUrl } = _getData(props),
      style = {},
      children = props.children,
      className = 'emoji-mart-emoji',
      title = null

  if (!unified && !custom) {
    return null
  }

  if (props.tooltip) {
    title = short_names[0]
  }

  if (props.native && unified) {
    className += ' emoji-mart-emoji-native'
    style = { fontSize: props.size }
    children = unifiedToNative(unified)

    if (props.forceSize) {
      style.display = 'inline-block'
      style.width = props.size
      style.height = props.size
    }
  } else if (custom) {
    className += ' emoji-mart-emoji-custom'
    style = {
      width: props.size,
      height: props.size,
      display: 'inline-block',
      backgroundImage: `url(${imageUrl})`,
      backgroundSize: 'contain',
    }
  } else {
    let setHasEmoji = _getData(props)[`has_img_${props.set}`]

    if (!setHasEmoji) {
      return null
    }

    style = {
      width: props.size,
      height: props.size,
      display: 'inline-block',
      backgroundImage: `url(${props.backgroundImageFn(props.set, props.sheetSize)})`,
      backgroundSize: `${100 * SHEET_COLUMNS}%`,
      backgroundPosition: _getPosition(props),
    }
  }

  return <span
    key={props.emoji.id || props.emoji}
    onClick={(e) => _handleClick(e, props)}
    onMouseEnter={(e) => _handleOver(e, props)}
    onMouseLeave={(e) => _handleLeave(e, props)}
    title={title}
    className={className}>
    <span style={style}>{children}</span>
  </span>
}

Emoji.propTypes = {
  onOver: PropTypes.func,
  onLeave: PropTypes.func,
  onClick: PropTypes.func,
  backgroundImageFn: PropTypes.func,
  native: PropTypes.bool,
  forceSize: PropTypes.bool,
  tooltip: PropTypes.bool,
  skin: PropTypes.oneOf([1, 2, 3, 4, 5, 6]),
  sheetSize: PropTypes.oneOf([16, 20, 32, 64]),
  set: PropTypes.oneOf(['apple', 'google', 'twitter', 'emojione', 'messenger', 'facebook']),
  size: PropTypes.number.isRequired,
  emoji: PropTypes.oneOfType([
    PropTypes.string,
    PropTypes.object,
  ]).isRequired,
}

Emoji.defaultProps = {
  skin: 1,
  set: 'apple',
  sheetSize: 64,
  native: false,
  forceSize: false,
  tooltip: false,
  backgroundImageFn: ((set, sheetSize) => `https://unpkg.com/emoji-datasource-${set}@${EMOJI_DATASOURCE_VERSION}/img/${set}/sheets/${sheetSize}.png`),
  onOver: (() => {}),
  onLeave: (() => {}),
  onClick: (() => {}),
}

export default Emoji