class Muck::CommentsController < ApplicationController
  unloadable
  
  before_filter :get_parent, :only => [:create]
  before_filter :get_comment, :only => [:destroy]

  def create
    @comment = @parent.comments.build(params[:comment])
    @comment.user = current_user
    @comment.save!
    respond_to do |format|
      format.html do
        redirect_back_or_default(@parent)
      end
      format.json { render :json => { :success => true, :comment => @comment, :parent_id => @parent.id, :html => get_parent_comment_html(@parent) } }
    end
  rescue ActiveRecord::RecordInvalid => ex
    if @comment
      @errors = @comment.errors.full_messages.to_sentence
    else
      @errors = ex
    end
    message = t('muck.comments.create_error', :errors => @errors)
    respond_to do |format|
      format.html do
        flash[:error] = message
        redirect_back_or_default(@parent)
      end
      format.json { render :json => { :success => false, :message => message, :errors => @errors } }
    end
  end

  def destroy
    @comment.destroy
    respond_to do |format|
      format.html do
        flash[:notice] = t('muck.comments.comment_removed')
        redirect_back_or_default(current_user)
      end
      format.js do
        render(:update) do |page|
          page << "jQuery('##{@comment.dom_id}').fadeOut();"
        end
      end
      format.json { render :json => { :success => true, :message => t("muck.comments.comment_removed"), :comment_id => @comment.id } }
    end
  end  

  protected

  def get_parent
    if !params[:parent_type] || !params[:parent_id]
      raise t('muck.comments.missing_parent_id_error')
      return
    end
    @klass = params[:parent_type].to_s.capitalize.constantize
    @parent = @klass.find(params[:parent_id])
    unless has_permission_to_comment(current_user, @parent)
      permission_denied
    end
  end

  def get_comment
    @comment = Comment.find(params[:id])
    unless @comment.can_edit?(current_user)
      respond_to do |format|
        format.html do
          flash[:notice] = I18n.t('muck.comments.cant_delete_comment')
          redirect_back_or_default current_user
        end
        format.js { render(:update){|page| page.alert I18n.t('muck.comments.cant_delete_comment')}}
      end
    end
  end

  def get_parent_comment_html(parent)
    old_format = @template.template_format
    @template.template_format = :html
    comment = render_to_string(:partial => "#{parent.class.to_s.tableize}/comment", :locals => {:comment_owner => parent})
    @template.template_format = old_format
    comment
  rescue ActionView::MissingTemplate
    I18n.t('muck.comments.missing_comment_template_error', :partial => "#{parent.class.to_s.tableize}/comment")
  end
  
  def has_permission_to_comment(user, parent)
    parent.can_comment?(user)
  end
  
end