class window.Vkontakte
  
  qr: null
  api_id: null
  
  constructor: (@api_id) ->
  
  getApiId: ->
    @api_id
  
  init: ->
    @qr = {}
    
    window.vkAsyncInit = ->
      VK.init apiId: _vkontakte.getApiId()
      VK.Auth.getLoginStatus (response) ->
        _vkontakte.authInfo(response)


    setTimeout ->
      $('#vk_api_transport').append('<script async="async" type="text/javascript" src="http://vkontakte.ru/js/api/openapi.js"></script>')
    , 0
  
  authInfo: (response) ->
    if typeof response isnt 'undefined' and response.session      
      _session = new Session(response.session)
      _session.query '/user/auth', {}, (ar) ->
        if ar.ok_reload
          window.location.reload()
          false
        if ar.newbie
          VK.Api.call 'getVariable', key: 1281, (r) ->
            _session.query '/user/update', name: r.response, (ar2) ->
              _session.setUser ar2.user
              $('#username')
                .html (if _session.getUser().name then _session.getUser().name else '%username%')
              window._session = _session
              _ajax.detectPage()
              _session.displayAuthorizedContent()
              $('#authorized').css display: 'block'
        else
          _session.setUser ar.user
        
        $('#username')
          .html (if _session.getUser().name then _session.getUser().name else '%username%')
          _session.displayAuthorizedContent()
        window._session = _session
        _ajax.detectPage()
        $('.fullscreen').hide();
      
      if response.session.expire?
        setTimeout ->
          _vkontakte.auth()
          false
        , response.session.expire * 1000 - new Date().getTime() + 1000
    else
      _session = new Session({})
      _session.setUser {}
      _session.hideAuthorizedContent()
      window._session = _session
      _ajax.detectPage()
      $('.fullscreen').hide();
  
  auth: ->
    VK.Auth.getLoginStatus (response) ->
      _vkontakte.authInfo(response)
      false
    , 8
    false
  
  loadTracksData: (artist, track, duration, callback) ->
    track_prepared = track.replace(/\(.*\)/i, '').split('/')[0];
    query = artist+' '+track_prepared;
    if url = _vkontakte.getQR query
      callback url
    else
      VK.Api.call 'audio.search', q: query, (r) ->
        url = _vkontakte.matchPerfectResult r.response, artist, track, duration
        _vkontakte.addQR query, url
        callback url
  
  matchPerfectResult: (data, artist, track, duration) ->
    duration = duration.split ':'
    duration = parseInt(duration[0], 10) * 60 + parseInt(duration[1], 10)
    best_score = 0;
    best_result = null;
    for item in data
      if typeof item is 'object'
        score = 0;
        item.artist = item.artist.trim();
        item.title = item.title.trim();
      
        if item.artist == artist
          score += 10
        else if item.artist.split(artist).length is 2
          score += 5
        else if item.title.split(artist).length is 2
          score += 4
      
        if item.title == track
          score += 10
        else if item.title.split(track).length is 2
          score += 5
      
        if parseInt(item.duration, 10) == duration
          score += 15
        else
          delta = Math.abs parseInt(item.duration, 10) - duration
          score += (10 - delta) if delta < 10
      
        if score > best_score
          best_score = score
          best_result = item
      
        if score is 35
          return best_result.url

    return best_result.url
  
  addQR: (query, url) ->
    _vkontakte.qr[query] = url;
  
  getQR: (query) ->
    if _vkontakte.qr[query]?
      _vkontakte.qr[query]
    false

$('#login').live 'click', ->
  VK.Auth.login (response) ->
    _vkontakte.authInfo(response)
    false
  , 8
  false
$('#logout').live 'click', ->
  _ajax.go '/search/';
  VK.Auth.logout (response) ->
    _vkontakte.authInfo(response)
    false
  false