import * as React from 'react'
import { SFC } from 'react'
import { get } from '@utils/theme'
import styled, { keyframes } from 'styled-components'

const octocatWave = keyframes`
  0%, 100% {
    transform: rotate(0);
  }
  20%, 60% {
    transform: rotate(-25deg);
  }
  40%, 80% {
    transform: rotate(10deg);
  }
`

const Link = styled.a`
  &:hover .octo-arm {
    animation: ${octocatWave} 560ms ease-in-out;
  }

  & .octo-arm {
    transform-origin: 130px 106px;
  }

  @media screen and (max-width: 500px) {
    &:hover .octo-arm {
      animation: none;
    }
    & .octo-arm {
      animation: ${octocatWave} 560ms ease-in-out;
    }
  }
`

const Svg = styled.svg`
  z-index: 99;
  fill: ${get('colors.primary')};
  color: ${get('colors.background')};
  position: absolute;
  top: 0;
  border: 0;
  right: 0;
`

interface GithubLinkProps {
  repository: string
}

export const GithubLink: SFC<GithubLinkProps> = ({ repository }) => (
  <Link href={repository} target="_blank" aria-label="View source on Github">
    <Svg width="80" height="80" viewBox="0 0 250 250" aria-hidden="true">
      <path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z" />
      <path
        className="octo-arm"
        fill="currentColor"
        d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2"
      />
      <path
        className="octo-body"
        fill="currentColor"
        d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z"
      />
    </Svg>
  </Link>
)