module CamaleonCms
  module Admin
    class PostsController < CamaleonCms::AdminController
      add_breadcrumb I18n.t('camaleon_cms.admin.sidebar.contents')
      before_action :set_post_type, except: [:ajax]
      before_action :set_post, only: %w[show edit update destroy]
      skip_before_action :admin_logged_actions, only: %i[trash restore destroy ajax], raise: false
      skip_before_action :verify_authenticity_token, only: [:ajax], raise: false

      def index
        authorize! :posts, @post_type
        per_page = current_site.admin_per_page
        posts_all = @post_type.posts.eager_load(:parent, :post_type)
        if params[:taxonomy].present? && params[:taxonomy_id].present?
          if params[:taxonomy] == 'category'
            cat_owner = current_site.full_categories.find(params[:taxonomy_id]).decorate
            posts_all = cat_owner.posts
            add_breadcrumb t('camaleon_cms.admin.post_type.category'), @post_type.the_admin_url('category')
            add_breadcrumb cat_owner.the_title, cat_owner.the_edit_url
          end

          if params[:taxonomy] == 'post_tag'
            tag_owner = current_site.post_tags.find(params[:taxonomy_id]).decorate
            posts_all = tag_owner.posts
            add_breadcrumb t('camaleon_cms.admin.post_type.tags'), @post_type.the_admin_url('tag')
            add_breadcrumb tag_owner.the_title, tag_owner.the_edit_url
          end
        end

        if params[:q].present?
          params[:q] = (params[:q] || '').downcase
          posts_all = posts_all.where(
            "LOWER(#{CamaleonCms::Post.table_name}.title) LIKE ? OR LOWER(#{CamaleonCms::Post.table_name}.slug) LIKE ?",
            "%#{params[:q]}%",
            "%#{params[:q]}%"
          )
        end

        posts_all = posts_all.where(user_id: cama_current_user) if cannot?(:edit_other, @post_type)

        @posts = posts_all
        params[:s] = 'published' unless params[:s].present?
        @lists_tab = params[:s]
        case params[:s]
        when 'published', 'pending', 'trash'
          @posts = @posts.send(params[:s])
        when 'draft'
          @posts = @posts.drafts
        when 'all'
          @posts = @posts.no_trash
        end

        @btns = { published: "#{t('camaleon_cms.admin.post_type.published')} (#{posts_all.published.size})",
                  all: "#{t('camaleon_cms.admin.post_type.all')} (#{posts_all.no_trash.size})", pending: "#{t('camaleon_cms.admin.post_type.pending')} (#{posts_all.pending.size})", draft: "#{t('camaleon_cms.admin.post_type.draft')} (#{posts_all.drafts.size})", trash: "#{t('camaleon_cms.admin.post_type.trash')} (#{posts_all.trash.size})" }
        per_page = 9_999_999 if @post_type.manage_hierarchy?
        r = { posts: @posts, post_type: @post_type, btns: @btns, all_posts: posts_all, render: 'index',
              per_page: per_page }
        hooks_run('list_post', r)
        add_breadcrumb (@btns[params[:s].to_sym]).to_s if params[:s].present?
        @posts = r[:posts].paginate(page: params[:page], per_page: r[:per_page])
        render r[:render]
      end

      def show; end

      def new
        add_breadcrumb I18n.t('camaleon_cms.admin.button.new')
        authorize! :create_post, @post_type
        @post_form_extra_settings = []
        @post ||= @post_type.posts.new
        r = { post: @post, post_type: @post_type, extra_settings: @post_form_extra_settings, render: 'form' }
        hooks_run('new_post', r)
        render r[:render]
      end

      def create
        authorize! :create_post, @post_type
        post_data = get_post_data(true)
        begin
          CamaleonCms::Post.drafts.find(post_data[:draft_id]).destroy
        rescue StandardError
          nil
        end
        @post = @post_type.posts.new(post_data)
        r = { post: @post, post_type: @post_type }
        hooks_run('create_post', r)
        @post = r[:post]
        if @post.save
          @post.set_metas(params[:meta])
          @post.set_field_values(params[:field_options])
          @post.set_options(params[:options])
          flash[:notice] = t('camaleon_cms.admin.post.message.created', post_type: @post_type.decorate.the_title)
          r = { post: @post, post_type: @post_type }
          hooks_run('created_post', r)
          redirect_to action: :edit, id: @post.id
        else
          # render 'form'
          new
        end
      end

      def edit
        add_breadcrumb I18n.t('camaleon_cms.admin.button.edit')
        authorize! :update, @post
        @post_form_extra_settings = []
        r = { post: @post, post_type: @post_type, extra_settings: @post_form_extra_settings, render: 'form' }
        hooks_run('edit_post', r)
        render r[:render]
      end

      def update
        post_data = get_post_data
        delete_drafts = false
        if @post.draft_child? && @post.parent.present?
          # This is a draft (as a child of the original post)
          original_parent = @post.parent.parent
          post_data[:post_parent] = original_parent.present? ? original_parent.id : nil
          @post = @post.parent
          delete_drafts = true
        elsif @post.draft?
          # This is a normal draft (post whose status was set to 'draft')
          @post.status = 'published' if post_data[:status].blank?
        end
        authorize! :update, @post
        r = { post: @post, post_type: @post_type }
        hooks_run('update_post', r)
        @post = r[:post]
        if @post.update(post_data)
          # delete drafts only on successful update operation
          @post.drafts.destroy_all if delete_drafts
          @post.set_metas(params[:meta])
          @post.set_field_values(params[:field_options])
          @post.set_options(params[:options])
          hooks_run('updated_post', { post: @post, post_type: @post_type })
          flash[:notice] = t('camaleon_cms.admin.post.message.updated', post_type: @post_type.decorate.the_title)
          redirect_to action: :edit, id: @post.id
        else
          edit
        end
      end

      def trash
        @post = @post_type.posts.find(params[:post_id])
        authorize! :destroy, @post
        @post.set_option('status_default', @post.status)
        # @post.children.destroy_all unless @post.draft? TODO: why delete children?
        @post.update_column('status', 'trash')
        @post.update_extra_data
        hooks_run('trashed_post', { post: @post, post_type: @post_type })
        flash[:notice] = t('camaleon_cms.admin.post.message.trash', post_type: @post_type.decorate.the_title)
        redirect_to action: :index, s: params[:s]
      end

      def restore
        @post = @post_type.posts.find(params[:post_id])
        authorize! :update, @post
        @post.update_column('status', @post.options[:status_default] || 'pending')
        @post.update_extra_data
        hooks_run('restored_post', { post: @post, post_type: @post_type })
        flash[:notice] = t('camaleon_cms.admin.post.message.restore', post_type: @post_type.decorate.the_title)
        redirect_to action: :index, s: params[:s]
      end

      def destroy
        authorize! :destroy, @post
        r = { post: @post, post_type: @post_type, flag: true }
        hooks_run('destroy_post', r)
        if r[:flag]
          if @post.destroy
            hooks_run('destroyed_post', { post: @post, post_type: @post_type })
            flash[:notice] = t('camaleon_cms.admin.post.message.deleted', post_type: @post_type.decorate.the_title)
            return redirect_to action: :index, s: params[:s]
          else
            flash[:error] = @post.errors.full_messages.join(', ')
          end
        end
        redirect_to(request.referer || url_for(action: :index, s: params[:s]))
      end

      # ajax options
      def ajax
        json = { error: 'Not Found' }
        case params[:method]
        when 'exist_slug'
          slug = current_site.get_valid_post_slug(params[:slug].to_s, params[:post_id])
          json = { slug: slug, index: 1 }
        end
        render json: json
      end

      private

      # define post type parent
      def set_post_type
        @post_type = current_site.post_types.find_by_id(params[:post_type_id])
        unless @post_type.present?
          flash[:error] = t('camaleon_cms.admin.request_error_message')
          redirect_to cama_admin_path
          return
        end
        @post_type = @post_type.decorate
        add_breadcrumb @post_type.the_title, @post_type.the_admin_url
      end

      def set_post
        @post = @post_type.posts.find(params[:id])
        @post_decorate = @post.decorate
      rescue StandardError
        flash[:error] = t('camaleon_cms.admin.post.message.error', post_type: @post_type.decorate.the_title)
        redirect_to cama_admin_path
      end

      # return common params data for posts
      # is_create: indicate if this info is for create a new post
      def get_post_data(is_create = false)
        post_data = params.require(:post).permit!
        post_data[:user_id] = cama_current_user.id if is_create
        post_data[:status] = 'pending' if post_data[:status] == 'published' && cannot?(:publish_post, @post_type)
        post_data[:data_tags] = params[:tags].to_s
        post_data[:data_categories] = params[:categories] || []
        post_data
      end
    end
  end
end