class Pettanr.ActionFilter
  
  # access block
  # return sign in form if invalid url
  # return null if url is valid
  @test: (params) ->
    return @guest_url() if @is_deny('reader', params) or @is_deny('resource_reader', params) or @is_deny('user', params)
    return @new_author_url() if @is_deny('author', params)
    return @new_artist_url() if @is_deny('artist', params)
    null
  
  @filters: () ->
    if Pettanr.is_sns()
      @sns_filters()
    else
      @blog_filters()
  
  @my_filters: (role, params) ->
    f = @filters()
    c = f[params['controller']] || {}
    r = c[role]
    r
  
  @before_filter: (action_name, filter_action_names) ->
    _.contains(filter_action_names, action_name)
  
  # return false if allow
  # return true if deny
  @is_deny: (role, params) ->
    n = 'is_' + role
    if not Pettanr.cache.operators[n]()  # ex: operators.is_user()
      filter = @my_filters(role, params)
      if @before_filter(params['action'], filter)
        return true
    false
  
  @guest_url: () ->
    'user_seeeions/new'
  
  @new_author_url: () ->
    'authors/new'
  
  @new_artist_url: () ->
    'artists/new'
  
  @suply_default: (reader, resource_reader, user, author, artist) ->
    author_filter = if _.isFunction(author)
      author()
    else
      _.union(@default_author_filters, author)
    artist_filter = if _.isFunction(artist)
      artist()
    else
      _.union(@default_artist_filters, artist)
    {
      reader: _.union(@default_reader_filters, reader),
      resource_reader: _.union(@default_resource_reader_filters, resource_reader),
      user: _.union(@default_user_filters, user),
      author: author_filter,
      artist: artist_filter
    }
  
  @default_reader_filters = ['index', 'show']
  @default_resource_reader_filters = []
  @default_user_filters = ['new', 'create', 'edit', 'update', 'destroy']
  @default_author_filters = ['new', 'create', 'edit', 'update', 'destroy']
  @default_artist_filters = []
  
  @sns_filters: () ->
    {
      folders: @suply_default(
        ['root', 'watch'], 
        [], 
        [], 
        [], 
        []
      ),
      scrolls: @suply_default(
        ['play', 'by_panel', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      scroll_panels: @suply_default(
        ['by_panel', 'by_scroll', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      comics: @suply_default(
        ['play', 'by_story', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      comic_stories: @suply_default(
        ['by_story', 'by_comic', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      stories: @suply_default(
        ['play', 'by_comic', 'by_sheet', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      story_sheets: @suply_default(
        ['by_story', 'by_sheet', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      sheets: @suply_default(
        ['play', 'by_story', 'by_panel', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      sheet_panels: @suply_default(
        ['by_panel', 'by_sheet', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      panels: @suply_default(
        ['by_scroll', 'by_sheet', 'by_author', 'by_speech_balloon_template'], 
        [], 
        [], 
        [], 
        []
      ),
      panel_pictures: @suply_default(
        ['by_panel', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      speech_balloons: @suply_default(
        ['by_panel', 'by_author', 'by_speech_balloon_template'], 
        [], 
        [], 
        [], 
        []
      ),
      speeches: @suply_default(
        ['by_author', 'by_speech_balloon', 'by_speech_balloon_template', 'by_writing_format'], 
        [], 
        [], 
        [], 
        []
      ),
      balloons: @suply_default(
        [], 
        [], 
        [], 
        [], 
        []
      ),
      ground_pictures: @suply_default(
        ['by_panel', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      ground_colors: @suply_default(
        ['by_panel', 'by_author'], 
        [], 
        [], 
        [], 
        []
      ),
      original_pictures: @suply_default(
        ['history'], 
        [], 
        [], 
        () ->
          []
        , 
        ['index', 'new', 'create', 'edit', 'update', 'destroy']
      ),
      pictures: @suply_default(
        ['credit', 'search'], 
        [], 
        [], 
        [], 
        []
      ),
      resource_pictures: @suply_default(
        ['credit', 'by_original_picture', 'by_license_group', 'by_license', 'by_artist'], 
        [], 
        [], 
        [], 
        ['new', 'create', 'edit', 'update', 'destroy']
      ),
      speech_balloon_templates: @suply_default(
        ['by_panel', 'by_system_picture'], 
        [], 
        [], 
        [], 
        []
      ),
      writing_formats: @suply_default(
        ['by_system_picture'], 
        [], 
        [], 
        [], 
        []
      ),
      license_groups: @suply_default(
        ['by_resource_picture'], 
        [], 
        [], 
        [], 
        []
      ),
      licenses: @suply_default(
        ['by_license_group', 'by_system_picture'], 
        [], 
        [], 
        [], 
        []
      ),
      authors: @suply_default(
        [], 
        [], 
        [], 
        () ->
          ['edit', 'update', 'destroy']
        , 
        () ->
          []
        , 
      ),
      artists: @suply_default(
        [], 
        [], 
        [], 
        () ->
          []
        , 
        () ->
          ['edit', 'update', 'destroy']
      ),
      system_pictures: @suply_default(
        [], 
        [], 
        [], 
        [], 
        []
      ),
      home: @suply_default(
        [
          'profile', 'configure', 'create_token', 'delete_token', 
          'scrolls', 'scroll_panels', 'comics', 'comic_stories', 'stories', 'story_sheets', 'sheets', 'sheet_panels', 
          'panels', 'panel_pictures', 'speech_balloons', 'balloons', 'speeches', 'ground_pictures', 'ground_colors'
        ], 
        [
          'scrolls', 'scroll_panels', 'comics', 'comic_stories', 'stories', 'story_sheets', 'sheets', 'sheet_panels', 
          'panels', 'panel_pictures', 'speech_balloons', 'balloons', 'speeches', 'ground_pictures', 'ground_colors'
        ], 
        [], 
        [], 
        []
      ),
    }
  
  @blog_filters: () ->
    default_reader_filters = []
    default_user_filters = ['new', 'create', 'edit', 'update', 'destroy']
    default_author_filters = ['new', 'create', 'edit', 'update', 'destroy']
    {
      'folders': {
        reader: _.union(default_reader_filters, []),
        resource_reader: _.union(default_resource_reader_filters, []),
        user: _.union(default_user_filters, []),
        author: _.union(default_author_filters, [])
      },
      'scrolls': {
        user: _.union(default_user_filters, []),
        author: _.union(default_author_filters, [])
      },
    }