#= require modernizr
#= require jquery
#= require date
#= require flexie
#= require keymaster
#= require xslt

# Add a new jQuery selector expression which does a case-insensitive :contains
jQuery.expr[':'].icontains = (a, i, m) ->
  (a.textContent ? a.innerText ? "").toUpperCase().indexOf(m[3].toUpperCase()) >= 0

class MailCatcher
  constructor: ->
    $('#messages tr').live 'click', (e) =>
      e.preventDefault()
      @loadMessage $(e.currentTarget).attr 'data-message-id'

    $('input[name=search]').keyup (e) =>
      query = $.trim $(e.currentTarget).val()
      if query
        @searchMessages query
      else
        @clearSearch()

    $('#message .views .format.tab a').live 'click', (e) =>
      e.preventDefault()
      @loadMessageBody @selectedMessage(), $($(e.currentTarget).parent('li')).data 'message-format'

    $('#message .views .analysis.tab a').live 'click', (e) =>
      e.preventDefault()
      @loadMessageAnalysis @selectedMessage()

    $('#message iframe').load =>
      @decorateMessageBody()

    $('#resizer').live
      mousedown: (e) =>
        e.preventDefault()
        $(window).bind events =
          mouseup: (e) =>
            e.preventDefault()
            $(window).unbind events
          mousemove: (e) =>
            e.preventDefault()
            @resizeTo e.clientY

    @resizeToSaved()

    $('nav.app .clear a').live 'click', (e) =>
      e.preventDefault()
      if confirm "You will lose all your received messages.\n\nAre you sure you want to clear all messages?"
        $.ajax
          url: '/messages'
          type: 'DELETE'
          success: =>
            @unselectMessage()
          error: ->
            alert 'Error while clearing all messages.'

    $('nav.app .quit a').live 'click', (e) =>
      e.preventDefault()
      if confirm "You will lose all your received messages.\n\nAre you sure you want to quit?"
        $.ajax
          type: 'DELETE'
          success: ->
            location.replace $('body > header h1 a').attr('href')
          error: ->
            alert 'Error while quitting.'

    key 'up', =>
      if @selectedMessage()
        @loadMessage $('#messages tr.selected').prev().data('message-id')
      else
        @loadMessage $('#messages tbody tr[data-message-id]:first').data('message-id')
      false

    key 'down', =>
      if @selectedMessage()
        @loadMessage $('#messages tr.selected').next().data('message-id')
      else
        @loadMessage $('#messages tbody tr[data-message-id]:first').data('message-id')
      false

    key '⌘+up, ctrl+up', =>
      @loadMessage $('#messages tbody tr[data-message-id]:first').data('message-id')
      false

    key '⌘+down, ctrl+down', =>
      @loadMessage $('#messages tbody tr[data-message-id]:last').data('message-id')
      false

    key 'left', =>
      @openTab @previousTab()
      false

    key 'right', =>
      @openTab @nextTab()
      false

    key 'backspace, delete', =>
      id = @selectedMessage()
      if id?
        $.ajax
          url: '/messages/' + id
          type: 'DELETE'
          success: =>
            messageRow = $("#messages tbody tr[data-message-id='#{id}']")
            switchTo = messageRow.next().data('message-id') || messageRow.prev().data('message-id')
            messageRow.remove()
            if switchTo
              @loadMessage switchTo
            else
              @unselectMessage()

          error: ->
            alert 'Error while removing message.'
      false

    @refresh()
    @subscribe()

  # Only here because Safari's Date parsing *sucks*
  # We throw away the timezone, but you could use it for something...
  parseDateRegexp: /^(\d{4})[-\/\\](\d{2})[-\/\\](\d{2})(?:\s+|T)(\d{2})[:-](\d{2})[:-](\d{2})(?:([ +-]\d{2}:\d{2}|\s*\S+|Z?))?$/
  parseDate: (date) ->
    if match = @parseDateRegexp.exec(date)
      new Date match[1], match[2] - 1, match[3], match[4], match[5], match[6], 0

  offsetTimeZone: (date) ->
    offset = Date.now().getTimezoneOffset() * 60000 #convert timezone difference to milliseconds
    date.setTime(date.getTime() - offset)
    date

  formatDate: (date) ->
    date &&= @parseDate(date) if typeof(date) == "string"
    date &&= @offsetTimeZone(date)
    date &&= date.toString("dddd, d MMM yyyy h:mm:ss tt")

  messagesCount: ->
    $('#messages tr').length - 1

  tabs: ->
    $('#message ul').children('.tab')

  getTab: (i) =>
    $(@tabs()[i])

  selectedTab: =>
    @tabs().index($('#message li.tab.selected'))

  openTab: (i) =>
    @getTab(i).children('a').click()

  previousTab: (tab)=>
    i = if tab || tab is 0 then tab else @selectedTab() - 1
    i = @tabs().length - 1 if i < 0
    if @getTab(i).is(":visible")
      i
    else
      @previousTab(i-1)

  nextTab: (tab) =>
    i = if tab then tab else @selectedTab() + 1
    i = 0 if i > @tabs().length - 1
    if @getTab(i).is(":visible")
      i
    else
      @nextTab(i+1)

  haveMessage: (message) ->
    message = message.id if message.id?
    $("#messages tbody tr[data-message-id=\"#{message}\"]").length > 0

  selectedMessage: ->
    $('#messages tr.selected').data 'message-id'

  searchMessages: (query) ->
    selector = (":icontains('#{token}')" for token in query.split /\s+/).join ""
    $rows = $("#messages tbody tr")
    $rows.not(selector).hide()
    $rows.filter(selector).show()

  clearSearch: ->
    $('#messages tbody tr').show()

  addMessage: (message) ->
    $('<tr />').attr('data-message-id', message.id.toString())
      .append($('<td/>').text(message.sender or "No sender").toggleClass("blank", !message.sender))
      .append($('<td/>').text((message.recipients || []).join(', ') or "No receipients").toggleClass("blank", !message.recipients.length))
      .append($('<td/>').text(message.subject or "No subject").toggleClass("blank", !message.subject))
      .append($('<td/>').text(@formatDate(message.created_at)))
      .prependTo($('#messages tbody'))

  scrollToRow: (row) ->
    relativePosition = row.offset().top - $('#messages').offset().top
    if relativePosition < 0
      $('#messages').scrollTop($('#messages').scrollTop() + relativePosition - 20)
    else
      overflow = relativePosition + row.height() - $('#messages').height()
      if overflow > 0
        $('#messages').scrollTop($('#messages').scrollTop() + overflow + 20)

  unselectMessage: ->
    $('#messages tbody, #message .metadata dd').empty()
    $('#message .metadata .attachments').hide()
    $('#message iframe').attr 'src', 'about:blank'
    null

  loadMessage: (id) ->
    id = id.id if id?.id?
    id ||= $('#messages tr.selected').attr 'data-message-id'

    if id?
      $("#messages tbody tr:not([data-message-id='#{id}'])").removeClass 'selected'
      messageRow = $("#messages tbody tr[data-message-id='#{id}']")
      messageRow.addClass 'selected'
      @scrollToRow(messageRow)

      $.getJSON "/messages/#{id}.json", (message) =>
        $('#message .metadata dd.created_at').text @formatDate message.created_at
        $('#message .metadata dd.from').text message.sender
        $('#message .metadata dd.to').text (message.recipients || []).join(', ')
        $('#message .metadata dd.subject').text message.subject
        $('#message .views .tab.format').each (i, el) ->
          $el = $(el)
          format = $el.attr 'data-message-format'
          if $.inArray(format, message.formats) >= 0
            $el.find('a').attr('href', "/messages/#{id}.#{format}")
            $el.show()
          else
            $el.hide()

        if $("#message .views .tab.selected:not(:visible)").length
          $("#message .views .tab.selected").removeClass "selected"
          $("#message .views .tab:visible:first").addClass "selected"

        if message.attachments.length
          $ul = $('<ul/>').appendTo($('#message .metadata dd.attachments').empty())

          $.each message.attachments, (i, attachment) ->
            $ul.append($('<li>').append($('<a>').attr('href', attachment['href']).addClass(attachment['type'].split('/', 1)[0]).addClass(attachment['type'].replace('/', '-')).text(attachment['filename'])));
          $('#message .metadata .attachments').show()
        else
          $('#message .metadata .attachments').hide()

        $('#message .views .download a').attr 'href', "/messages/#{id}.eml"

        if $('#message .views .tab.analysis.selected').length
          @loadMessageAnalysis()
        else
          @loadMessageBody()

  # XXX: These should probably cache their iframes for the current message now we're using a remote service:

  loadMessageBody: (id, format) ->
    id ||= @selectedMessage()
    format ||= $('#message .views .tab.format.selected').attr 'data-message-format'
    format ||= 'html'

    $("#message .views .tab[data-message-format=\"#{format}\"]:not(.selected)").addClass 'selected'
    $("#message .views .tab:not([data-message-format=\"#{format}\"]).selected").removeClass 'selected'

    if id?
      $('#message iframe').attr "src", "/messages/#{id}.#{format}"

      app = this

  decorateMessageBody: ->
    format = $('#message .views .tab.format.selected').attr 'data-message-format'

    switch format
      when 'html'
        body = $('#message iframe').contents().find('body')
        $("a", body).attr("target", "_blank")
      when 'plain'
        message_iframe = $('#message iframe').contents()
        text = message_iframe.text()
        text = text.replace(/((http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&amp;:\/~\+#]*[\w\-\@?^=%&amp;\/~\+#])?)/g, '<a href="$1" target="_blank">$1</a>')
        text = text.replace(/\n/g, '<br/>')
        message_iframe.find('html').html('<html><body>' + text + '</html></body>')

  loadMessageAnalysis: (id) ->
    id ||= @selectedMessage()

    $("#message .views .analysis.tab:not(.selected)").addClass 'selected'
    $("#message .views :not(.analysis).tab.selected").removeClass 'selected'

    if id?
      # Makes a new iframe and populate it with a quick intro and a button
      $iframe = $('#message iframe').contents().children()
        .html("""
          <html>
          <head>
          <title>Analysis</title>
          #{$('link[rel="stylesheet"]')[0].outerHTML}
          </head>
          <body class="iframe">
          <h1>Analyse your email with Fractal</h1>
          <p><a href="http://getfractal.com/" target="_blank">Fractal</a> is a really neat service that applies common email design and development knowledge from <a href="http://www.email-standards.org/" target="_blank">Email Standards Project</a> to your HTML email and tells you what you've done wrong or what you should do instead.</p>
          <p>Please note that this <strong>sends your email to the Fractal service</strong> for analysis. Read their <a href="https://www.getfractal.com/page/terms" target="_blank">terms of service</a> if you're paranoid.</p>
          <form>
          <input type="submit" value="Analyse" /><span class="loading" style="color: #999; display: none">Analysing&hellip;</span>
          </form>
          </body>
          </html>
        """)
      $form = $iframe.find('form')
        .submit (e) ->
          e.preventDefault()
          $(this)
            .find('input[type="submit"]').attr('disabled', 'disabled').end()
            .find('.loading').show()
          $('#message iframe').contents().find('body').xslt("/messages/#{id}/analysis.xml", "/stylesheets/analysis.xsl")

  refresh: ->
    $.getJSON '/messages', (messages) =>
      $.each messages, (i, message) =>
        unless @haveMessage message
          @addMessage message

  subscribe: ->
    if WebSocket?
      @subscribeWebSocket()
    else
      @subscribePoll()

  subscribeWebSocket: ->
    secure = window.location.scheme == 'https'
    @websocket = new WebSocket("#{if secure then 'wss' else 'ws'}://#{window.location.host}/messages")
    @websocket.onmessage = (event) =>
      @addMessage $.parseJSON event.data

  subscribePoll: ->
    unless @refreshInterval?
      @refreshInterval = setInterval (=> @refresh()), 1000

  resizeToSavedKey: 'mailcatcherSeparatorHeight'

  resizeTo: (height) ->
    $('#messages').css
      height: height - $('#messages').offset().top
    window.localStorage?.setItem(@resizeToSavedKey, height)

  resizeToSaved: ->
    height = parseInt(window.localStorage?.getItem(@resizeToSavedKey))
    unless isNaN height
      @resizeTo height

$ -> window.MailCatcher = new MailCatcher