import fetch from 'node-fetch'
import fetchJsonp from 'fetch-jsonp'

export const integrations = [
  {
    type: 'image',
    regex: /\.(jpeg|jpg|gif|png|svg)(\?.*)?$/i,
    fetch: function(url, done) {
      var img = new Image ()
      img.onload = function(){
        if (!img) return
        var width = img.naturalWidth, height = img.naturalHeight
        img = null
        done({
          url: url,
          type: "image",
          token: "",
          thumbnail: "",
          title: "",
          width: width,
          height: height,
        })
      }
      img.src = url
      if (img.complete) {
        img.onload()
      }
    },
    tag: function (media) {
      return '<img src="' + media.url + '">';
    }
  }, {
    type: 'video',
    regex: /\.(mp4|webm)(\?.*)?$/i,
    fetch: function(url, done) {
      var video = document.createElement("video")
      var url_parts = url.replace(/\?.*$/, "").split("/")
      var filename = url_parts[ url_parts.length-1 ]
      video.addEventListener("loadedmetadata", function(){
        var width = video.videoWidth, height = video.videoHeight
        video = null
        done({
          url: url,
          type: "video",
          token: url,
          thumbnail: "/public/assets/img/video-thumbnail.png",
          title: filename,
          width: width,
          height: height,
        })
      })
      video.src = url
      video.load()
    },
    tag: function (media) {
      return '<video src="' + media.url + '">';
    }
  }, {
    type: 'audio',
    regex: /\.(wav|mp3)(\?.*)?$/i,
    fetch: function(url, done) {
      var audio = document.createElement("audio")
      var url_parts = url.replace(/\?.*$/, "").split("/")
      var filename = url_parts[ url_parts.length-1 ]
      audio.addEventListener("loadedmetadata", function(){
        var duration = audio.duration
        audio = null
        done({
          url: url,
          type: "audio",
          token: url,
          thumbnail: "/public/assets/img/audio-thumbnail.png",
          title: filename,
          duration: duration,
        })
      })
      audio.src = url
      audio.load()
    },
    tag: function (media) {
      return '<audio src="' + media.url + '">';
    }
  }, {
    type: 'youtube',
    regex:  /(?:youtube\.com\/(?:[^\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)([^"&?\/ ]{11})/i,
    fetch: function(url, done) {
      var id = (url.match(/v=([-_a-zA-Z0-9]{11})/i) || url.match(/youtu.be\/([-_a-zA-Z0-9]{11})/i) || url.match(/embed\/([-_a-zA-Z0-9]{11})/i))[1].split('&')[0];
      var thumb = "https://i.ytimg.com/vi/" + id + "/hqdefault.jpg"

      const jsonp_url = new URL('https://www.googleapis.com/youtube/v3/videos')
      const data = {
        id: id,
        key: "AIzaSyCaLRGY-hxs92045X-Jew7w1FgQPkStHgc",
        part: "id,contentDetails,snippet,status",
      }
      Object.keys(data).forEach(key => jsonp_url.searchParams.append(key, data[key]))

      fetchJsonp(jsonp_url.toString())
      .then(result => result.json())
      .then(result => {
        if (! result || ! result.items.length) {
          return alert("Sorry, this video URL is invalid.")
        }
        var res = result.items[0]
        // console.log(res)
        
        var dd = res.contentDetails.duration.match(/\d+/g).map(function(i){ return parseInt(i) })
        var duration = 0
        if (dd.length == 3) {
          duration = ((dd[0] * 60) + dd[1] * 60) + dd[2]
        }
        else if (dd.length == 2) {
          duration = (dd[0] * 60) + dd[1]
        }
        else {
          duration = dd[0]
        }
        
        ["maxres","high","medium","standard","default"].some(function(t){
          if (res.snippet.thumbnails[t]) {
            thumb = res.snippet.thumbnails[t].url
            return true
          }
          return false
        })
        
        done({
          url: url,
          type: "youtube",
          token: id,
          thumbnail: thumb,
          title: res.snippet.title,
          duration: duration,
          width: 640,
          height: 360,
        })
      })
    },
    tag: function (media) {
      // return '<img class="video" type="youtube" vid="'+media.token+'" src="'+media.thumbnail+'"><span class="playvid">&#9654;</span>';
      return '<div class="video" style="width: ' + media.width + 'px; height: ' + media.height + 'px; overflow: hidden; position: relative;"><iframe frameborder="0" scrolling="no" seamless="seamless" webkitallowfullscreen="webkitAllowFullScreen" mozallowfullscreen="mozallowfullscreen" allowfullscreen="allowfullscreen" id="okplayer" width="' + media.width + '" height="' + media.height + '" src="https://youtube.com/embed/' + media.token + '?showinfo=0" style="position: absolute; top: 0px; left: 0px; width: ' + media.width + 'px; height: ' + media.height + 'px;"></iframe></div>'
    }
  }, {
    type: 'vimeo',
    regex: /vimeo.com\/\d+$/i,
    fetch: function(url, done) {
      var id = url.match(/\d+$/i)[0];
      fetch('https://vimeo.com/api/v2/video/' + id + '.json')
      .then(result => result.json())
      .then(result => {
        if (result.length == 0) { return done(id, "", 640, 360) }
        var res = result[0]
        if (res.embed_privacy != "anywhere") {
          alert("Sorry, the author of this video has marked it private, preventing it from being embedded.", function(){})
          return
        }
        done({
          url: url,
          type: "vimeo",
          token: id,
          thumbnail: res.thumbnail_large,
          duration: res.duration,
          title: res.title,
          width: res.width,
          height: res.height,
        })
      })
    },
    tag: function (media) {
      // return '<img class="video" type="vimeo" vid="'+media.token+'" src="'+media.thumbnail+'"><span class="playvid">&#9654;</span>';
      return '<div class="video" style="width: ' + media.width + 'px; height: ' + media.height + 'px; overflow: hidden; position: relative;"><iframe frameborder="0" scrolling="no" seamless="seamless" webkitallowfullscreen="webkitAllowFullScreen" mozallowfullscreen="mozallowfullscreen" allowfullscreen="allowfullscreen" id="okplayer" src="https://player.vimeo.com/video/' + media.token + '?api=1&title=0&byline=0&portrait=0&playbar=0&player_id=okplayer&loop=0&autoplay=0" width="' + media.width + '" height="' + media.height + '" style="position: absolute; top: 0px; left: 0px; width: ' + media.width + 'px; height: ' + media.height + 'px;"></iframe></div>'
    }
  },
  // {
  //   type: 'soundcloud',
  //   regex: /soundcloud.com\/[-a-zA-Z0-9]+\/[-a-zA-Z0-9]+\/?$/i,
  //   fetch: function (url, done) {
  //     fetch('https://api.soundcloud.com/resolve.json?url=' 
  //         + url
  //         + '&client_id=' 
  //         + '0673fbe6fc794a7750f680747e863b10')
  //     .then(result => result.json())
  //     .then(result => {
  //         console.log(result)
  //         done({
  //           url: url,
  //           type: "soundcloud",
  //           token: result.id,
  //           thumbnail: result.artwork_url || result.user.avatar_url,
  //           title: result.user.username + " - " + result.title,
  //           duration: result.duration,
  //           width: 166,
  //           height: 166,
  //         })
  //     })
  //   },
  //   tag: function (media) {
  //     return '<iframe width="166" height="166" scrolling="no" frameborder="no"' +
  //         'src="https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/' + media.token +
  //         '&amp;color=ff6600&amp;auto_play=false&amp;show_artwork=true"></iframe>'
  //   }
  // },
  {
    type: 'link',
    regex: /^http.+/i,
    fetch: function(url, done) {
      done({
        url: url,
        type: "link",
        token: "",
        thumbnail: "",
        title: "",
        width: 100,
        height: 100,
      })
    },
    tag: function (media) {
      return '<a href="' + media.url + '" target="_blank">' + media.url + '</a>'
    }
  },
]

export const lookup = integrations.reduce((a,b) => (a[b.type] = b) && a, {})

export const parse = (url, cb) => {
  const matched = integrations.some(integration => {
    if (integration.regex.test(url)) {
      integration.fetch(url, function(res){
        cb(res)
      })
      return true
    }
    return false
  })
  if (! matched) {
    cb(null)
  }
}

export const tag = media => {
  if (media.type in lookup) {
    return lookup[media.type].tag(media)
  }
  return ""
}

export const loadImage = (url, cb, error) => {
  if (lookup.image.regex.test(url)) {
    lookup.image.fetch(url, media => {
      cb(media)
    })
  }
  else error && error()
}
  
export const thumbnail = media => {
  return '<img src="' + (media.thumbnail || media.url) + '" class="thumb">';
}

export const tumblr = (url, cb) => {
  let domain = url.replace(/^https?:\/\//,"").split("/")[0]
  if (domain.indexOf(".") == -1) {
    domain += ".tumblr.com"
  }
  fetchJsonp("http://" + domain + "/api/read")
  .then(data => {
    // const blog = data.tumblelog
    const media_list = data.posts.reduce(parseTumblrPost, [])
    cb(media_list)
  })
}

function parseTumblrPost(media_list, post){
  let media, caption, url
  switch (post.type) {
    case 'photo':
      caption = stripHTML(post['photo-caption'])
      if (post.photos.length) {
        post.photos.forEach(function(photo){
          media = {
            url: photo['photo-url-1280'],
            type: "image",
            token: "",
            thumbnail: photo['photo-url-500'],
            description: caption,
            width: parseInt(photo.width),
            height: parseInt(photo.height),
          }
          media_list.push(media)
        })
      }
      else {
        media = {
          url: post['photo-url-1280'],
          type: "image",
          token: "",
          thumbnail: post['photo-url-500'],
          description: caption,
          width: parseInt(post.width),
          height: parseInt(post.height),
        }
        media_list.push(media)
      }
      break
    case 'video':
      url = post['video-source']
      if (url.indexOf("http") !== 0) { break }
      if (lookup.youtube.regex.test(url)) {
        const id = (url.match(/v=([-_a-zA-Z0-9]{11})/i) || url.match(/youtu.be\/([-_a-zA-Z0-9]{11})/i) || url.match(/embed\/([-_a-zA-Z0-9]{11})/i))[1].split('&')[0];
        const thumb = "https://i.ytimg.com/vi/" + id + "/hqdefault.jpg"
        media = {
          url: post['video-source'],
          type: "youtube",
          token: id,
          thumbnail: thumb,
          title: stripHTML(post['video-caption']),
          width: 640,
          height: 360,
        }
        media_list.push(media)
      }
      break
    default:
      break
  }
  return media_list
}