module TkInspect
  module Inspector
    class ArRelationInspectorComponent < ::TkComponent::Base
      attr_accessor :inspector

      def generate(parent_component, options = {})
        @relation = eval(inspector.expression, inspector.inspected_binding)
        @count = @relation.size if @relation.loaded?
        parse_component(parent_component, options) do |p|
          p.vframe(sticky: 'nsew', x_flex: 1, y_flex: 1) do |f|
            f.hframe(sticky: 'wne', padding: '8', x_flex: 1) do |hf|
              hf.label(text: "Relation Class")
              hf.entry(value: @relation.class.to_s, state: 'disabled', x_flex: 1)
              hf.button(text: "Browse...", on_click: ->(e) { inspector.browse_class(@relation.class.to_s) })
              hf.label(text: "Model Class")
              hf.entry(value: @relation.klass.to_s, state: 'disabled', x_flex: 1)
              hf.button(text: "Browse...", on_click: ->(e) { inspector.browse_class(@relation.klass.to_s) })
              hf.label(text: "Table")
              hf.entry(value: @relation.table.name, state: 'disabled', x_flex: 1)
            end
            f.vframe(sticky: 'wne', padding: '8', x_flex: 1) do |vf|
              vf.label(text: "SQL expression", sticky: 'w')
              vf.text(value: @relation.to_sql, width: 20, height: 3, x_flex: 1, sticky: 'new')
            end
            if @count.present?
              f.hframe(sticky: 'w', padding: '8', x_flex: 1) do |hf|
                hf.label(text: "Object count")
                hf.entry(value: @count, state: 'disabled')
              end
            end
            f.hframe(sticky: 'sw', padding: '8', x_flex: 1) do |hf|
              if @relation.loaded?
                @table = f.insert_component(
                  TkComponent::TableViewComponent,
                  self,
                  data_source: self,
                  columns: @relation.first.attributes.map do |k, v|
                    { key: k, text: k }
                  end,
                  sticky: 'nsew', x_flex: 1, y_flex: 1)
              else
                hf.label(text: "Contents not loaded")
                hf.button(text: "Load contents") do |b|
                  b.on_click ->(e) { @relation.load; regenerate }
                end
                if @count.blank?
                  hf.button(text: "Get object count") do |b|
                    b.on_click ->(e) { @count = @relation.count; regenerate }
                  end
                end
              end
            end
          end
        end
      end

      def items_for_path(path = [])
        @relation.records.map(&:attributes)
      end
    end
  end
end