class ImageButton extends Button

  name: 'image'

  icon: 'picture-o'

  htmlTag: 'img'

  disableTag: 'pre, table'

  defaultImage: ''

  needFocus: false

  _init: () ->
    if @editor.opts.imageButton
      if Array.isArray(@editor.opts.imageButton)
        @menu = []
        for item in @editor.opts.imageButton
          @menu.push
            name: item + '-image'
            text: @_t(item + 'Image')
      else
        @menu = false
    else
      if @editor.uploader?
        @menu = [{
          name: 'upload-image',
          text: @_t 'uploadImage'
        }, {
          name: 'external-image',
          text: @_t 'externalImage'
        }]
      else
        @menu = false

    @defaultImage = @editor.opts.defaultImage

    @editor.body.on 'click', 'img:not([data-non-image])', (e) =>
      $img = $(e.currentTarget)

      #@popover.show $img
      range = document.createRange()
      range.selectNode $img[0]
      @editor.selection.range range
      unless @editor.util.support.onselectionchange
        @editor.trigger 'selectionchanged'

      false

    @editor.body.on 'mouseup', 'img:not([data-non-image])', (e) ->
      return false

    @editor.on 'selectionchanged.image', =>
      range = @editor.selection.range()
      return unless range?

      $contents = $(range.cloneContents()).contents()
      if $contents.length == 1 and $contents.is('img:not([data-non-image])')
        $img = $(range.startContainer).contents().eq(range.startOffset)
        @popover.show $img
      else
        @popover.hide()

    @editor.on 'valuechanged.image', =>
      $masks = @editor.wrapper.find('.simditor-image-loading')
      return unless $masks.length > 0
      $masks.each (i, mask) =>
        $mask = $(mask)
        $img = $mask.data 'img'
        unless $img and $img.parent().length > 0
          $mask.remove()
          if $img
            file = $img.data 'file'
            if file
              @editor.uploader.cancel file
              if @editor.body.find('img.uploading').length < 1
                @editor.uploader.trigger 'uploadready', [file]

    super()

  render: (args...) ->
    super args...
    @popover = new ImagePopover
      button: @

    if @editor.opts.imageButton == 'upload'
      @_initUploader @el

  renderMenu: ->
    super()
    @_initUploader()

  _initUploader: ($uploadItem = @menuEl.find('.menu-item-upload-image')) ->
    unless @editor.uploader?
      @el.find('.btn-upload').remove()
      return

    $input = null
    createInput = =>
      $input.remove() if $input
      $input = $ '<input/>',
        type: 'file'
        title: @_t('uploadImage')
        multiple: true
        accept: 'image/gif,image/jpeg,image/jpg,image/png,image/svg'
      .appendTo($uploadItem)

    createInput()

    $uploadItem.on 'click mousedown', 'input[type=file]', (e) ->
      e.stopPropagation()

    $uploadItem.on 'change', 'input[type=file]', (e) =>
      if @editor.inputManager.focused
        @editor.uploader.upload($input, {
          inline: true
        })
        createInput()
      else
        @editor.one 'focus', (e) =>
          @editor.uploader.upload($input, {
            inline: true
          })
          createInput()
        @editor.focus()
      @wrapper.removeClass('menu-on')


    @editor.uploader.on 'beforeupload', (e, file) =>
      return unless file.inline

      if file.img
        $img = $(file.img)
      else
        $img = @createImage(file.name)
        #$img.click()
        file.img = $img

      $img.addClass 'uploading'
      $img.data 'file', file

      @editor.uploader.readImageFile file.obj, (img) =>
        return unless $img.hasClass('uploading')
        src = if img then img.src else @defaultImage

        @loadImage $img, src, =>
          if @popover.active
            @popover.refresh()
            @popover.srcEl.val(@_t('uploading'))
              .prop('disabled', true)

    uploadProgress = $.proxy @editor.util.throttle((e, file, loaded, total) ->
      return unless file.inline

      $mask = file.img.data('mask')
      return unless $mask

      $img = $mask.data('img')
      unless $img && $img.hasClass('uploading') && $img.parent().length > 0
        $mask.remove()
        return

      percent = loaded / total
      percent = (percent * 100).toFixed(0)
      percent = 99 if percent > 99
      $mask.find('.progress').height "#{100 - percent}%"
    , 500), @
    @editor.uploader.on 'uploadprogress', uploadProgress

    @editor.uploader.on 'uploadsuccess', (e, file, result) =>
      return unless file.inline

      $img = file.img
      return unless $img.hasClass('uploading') and $img.parent().length > 0

      # in case mime type of response isnt correct
      if typeof result != 'object'
        try
          result = $.parseJSON result
        catch e
          result =
            success: false

      if result.success == false
        msg = result.msg || @_t('uploadFailed')
        alert msg
        img_path = @defaultImage
      else
        img_path = result.file_path

      @loadImage $img, img_path, =>
        $img.removeData 'file'
        $img.removeClass 'uploading'
        .removeClass 'loading'

        $mask = $img.data('mask')
        $mask.remove() if $mask
        $img.removeData 'mask'

        @editor.trigger 'valuechanged'
        if @editor.body.find('img.uploading').length < 1
          @editor.uploader.trigger 'uploadready', [file, result]

      if @popover.active
        @popover.srcEl.prop('disabled', false)
        @popover.srcEl.val result.file_path

    @editor.uploader.on 'uploaderror', (e, file, xhr) =>
      return unless file.inline
      return if xhr.statusText == 'abort'

      if xhr.responseText
        try
          result = $.parseJSON xhr.responseText
          msg = result.msg
        catch e
          msg = @_t('uploadError')

        # alert msg

      $img = file.img
      return unless $img.hasClass('uploading') and $img.parent().length > 0

      @loadImage $img, @defaultImage, =>
        $img.removeData 'file'
        $img.removeClass 'uploading'
        .removeClass 'loading'

        $mask = $img.data('mask')
        $mask.remove() if $mask
        $img.removeData 'mask'

      if @popover.active
        @popover.srcEl.prop('disabled', false)
        @popover.srcEl.val @defaultImage

      @editor.trigger 'valuechanged'
      if @editor.body.find('img.uploading').length < 1
        @editor.uploader.trigger 'uploadready', [file, result]


  _status: ->
    @_disableStatus()

  loadImage: ($img, src, callback) ->
    positionMask = =>
      imgOffset = $img.offset()
      wrapperOffset = @editor.wrapper.offset()
      $mask.css({
        top: imgOffset.top - wrapperOffset.top
        left: imgOffset.left - wrapperOffset.left
        width: $img.width()
        height: $img.height()
      }).show()

    $img.addClass('loading')
    $mask = $img.data('mask')
    if !$mask
      $mask = $('''
        <div class="simditor-image-loading">
          <div class="progress"></div>
        </div>
      ''')
        .hide()
        .appendTo(@editor.wrapper)
      positionMask()
      $img.data('mask', $mask)
      $mask.data('img', $img)

    img = new Image()

    img.onload = =>
      return if !$img.hasClass('loading') and !$img.hasClass('uploading')

      width = img.width
      height = img.height

      $img.attr
        src: src,
        width: width,
        height: height,
        'data-image-size': width + ',' + height
      .removeClass('loading')

      if $img.hasClass('uploading') # img being uploaded
        @editor.util.reflow @editor.body
        positionMask()
      else
        $mask.remove()
        $img.removeData('mask')

      callback(img) if $.isFunction(callback)

    img.onerror = ->
      callback(false) if $.isFunction(callback)
      $mask.remove()
      $img.removeData('mask')
        .removeClass('loading')

    img.setAttribute 'src', src

  createImage: (name = 'Image') ->
    @editor.focus() unless @editor.inputManager.focused
    range = @editor.selection.range()
    range.deleteContents()
    @editor.selection.range range

    # $block = @editor.selection.blockNodes().last()
    # if $block.is('p') and !@editor.util.isEmptyNode $block
    #   $block = $('<p/>').append(@editor.util.phBr).insertAfter($block)
    #   @editor.selection.setRangeAtStartOf $block, range
    #else if $block.is('li')
      #$block = @editor.util.furthestNode $block, 'ul, ol'
      #$block = $('<p/>').append(@editor.util.phBr).insertAfter($block)
      #@editor.selection.setRangeAtStartOf $block, range

    $img = $('<img/>').attr('alt', name)
    range.insertNode $img[0]
    @editor.selection.setRangeAfter $img, range
    @editor.trigger 'valuechanged'

    # $nextBlock = $block.next 'p'
    # unless $nextBlock.length > 0
    #   $nextBlock = $('<p/>').append(@editor.util.phBr).insertAfter($block)
    # @editor.selection.setRangeAtStartOf $nextBlock

    $img

  command: (src) ->
    $img = @createImage()

    @loadImage $img, src || @defaultImage, =>
      @editor.trigger 'valuechanged'
      @editor.util.reflow $img
      $img.click()

      @popover.one 'popovershow', =>
        @popover.srcEl.focus()
        @popover.srcEl[0].select()


class ImagePopover extends Popover

  offset:
    top: 6
    left: -4

  render: ->
    tpl = """
    <div class="link-settings">
      <div class="settings-field">
        <label>#{ @_t 'imageUrl' }</label>
        <input class="image-src" type="text" tabindex="1" />
        <a class="btn-upload" href="javascript:;"
          title="#{ @_t 'uploadImage' }" tabindex="-1">
          <span class="simditor-icon simditor-icon-upload"></span>
        </a>
      </div>
      <div class='settings-field'>
        <label>#{ @_t 'imageAlt' }</label>
        <input class="image-alt" id="image-alt" type="text" tabindex="1" />
      </div>
      <div class="settings-field">
        <label>#{ @_t 'imageSize' }</label>
        <input class="image-size" id="image-width" type="text" tabindex="2" />
        <span class="times">×</span>
        <input class="image-size" id="image-height" type="text" tabindex="3" />
        <a class="btn-restore" href="javascript:;"
          title="#{ @_t 'restoreImageSize' }" tabindex="-1">
          <span class="simditor-icon simditor-icon-undo"></span>
        </a>
      </div>
    </div>
    """
    @el.addClass('image-popover')
      .append(tpl)
    @srcEl = @el.find '.image-src'
    @widthEl = @el.find '#image-width'
    @heightEl = @el.find '#image-height'
    @altEl = @el.find '#image-alt'

    @srcEl.on 'keydown', (e) =>
      return unless e.which == 13 and !@target.hasClass('uploading')
      e.preventDefault()
      range = document.createRange()
      @button.editor.selection.setRangeAfter @target, range
      @hide()

    @srcEl.on 'blur', (e) =>
      @_loadImage @srcEl.val()

    @el.find('.image-size').on 'blur', (e) =>
      @_resizeImg $(e.currentTarget)
      @el.data('popover').refresh()

    @el.find('.image-size').on 'keyup', (e) =>
      inputEl = $(e.currentTarget)
      unless e.which == 13 or e.which == 27 or e.which == 9
        @_resizeImg inputEl, true

    @el.find('.image-size').on 'keydown', (e) =>
      inputEl = $(e.currentTarget)
      if e.which == 13 or e.which == 27
        e.preventDefault()
        if e.which == 13
          @_resizeImg inputEl
        else
          @_restoreImg()

        $img = @target
        @hide()
        range = document.createRange()
        @button.editor.selection.setRangeAfter $img, range
      else if e.which == 9
        @el.data('popover').refresh()

    @altEl.on 'keydown', (e) =>
      if e.which == 13
        e.preventDefault()

        range = document.createRange()
        @button.editor.selection.setRangeAfter @target, range
        @hide()

    @altEl.on 'keyup', (e) =>
      return if e.which == 13 or e.which == 27 or e.which == 9
      @alt = @altEl.val()
      @target.attr 'alt', @alt

    @el.find('.btn-restore').on 'click', (e) =>
      @_restoreImg()
      @el.data('popover').refresh()

    @editor.on 'valuechanged', (e) =>
      @refresh() if @active

    @_initUploader()

  _initUploader: ->
    $uploadBtn = @el.find('.btn-upload')
    unless @editor.uploader?
      $uploadBtn.remove()
      return

    createInput = =>
      @input.remove() if @input
      @input = $ '<input/>',
        type: 'file'
        title: @_t('uploadImage')
        multiple: true
        accept: 'image/gif,image/jpeg,image/jpg,image/png,image/svg'
      .appendTo($uploadBtn)

    createInput()

    @el.on 'click mousedown', 'input[type=file]', (e) ->
      e.stopPropagation()

    @el.on 'change', 'input[type=file]', (e) =>
      @editor.uploader.upload(@input, {
        inline: true,
        img: @target
      })
      createInput()

  _resizeImg: (inputEl, onlySetVal = false) ->
    value = inputEl.val() * 1
    return unless @target and ($.isNumeric(value) or value < 0)

    if inputEl.is @widthEl
      width = value
      height = @height * value / @width
      @heightEl.val height
    else
      height = value
      width = @width * value / @height
      @widthEl.val width

    unless onlySetVal
      @target.attr
        width: width
        height: height
      @editor.trigger 'valuechanged'

  _restoreImg: ->
    size = @target.data('image-size')?.split(",") || [@width, @height]
    @target.attr
      width: size[0] * 1
      height: size[1] * 1
    @widthEl.val(size[0])
    @heightEl.val(size[1])

    @editor.trigger 'valuechanged'

  _loadImage: (src, callback) ->
    if /^data:image/.test(src) and not @editor.uploader
      callback(false) if callback
      return

    return if @target.attr('src') == src

    @button.loadImage @target, src, (img) =>
      return unless img

      if @active
        @width = img.width
        @height = img.height

        @widthEl.val @width
        @heightEl.val @height

      if /^data:image/.test(src)
        blob = @editor.util.dataURLtoBlob src
        blob.name = "Base64 Image.png"
        @editor.uploader.upload blob,
          inline: true
          img: @target
      else
        @editor.trigger 'valuechanged'

      callback(img) if callback

  show: (args...) ->
    super args...
    $img = @target
    @width = $img.width()
    @height = $img.height()
    @alt = $img.attr 'alt'

    if $img.hasClass 'uploading'
      @srcEl.val @_t('uploading')
        .prop 'disabled', true
    else
      @srcEl.val $img.attr('src')
        .prop 'disabled', false
      @widthEl.val @width
      @heightEl.val @height
      @altEl.val @alt


Simditor.Toolbar.addButton ImageButton