# frozen_string_literal: true

RSpec.describe "AI Composer helper", type: :system, js: true do
  fab!(:user) { Fabricate(:admin) }
  fab!(:non_member_group) { Fabricate(:group) }

  before do
    Group.find_by(id: Group::AUTO_GROUPS[:admins]).add(user)
    SiteSetting.composer_ai_helper_enabled = true
    sign_in(user)
  end

  let(:input) { "The rain in spain stays mainly in the Plane." }

  let(:composer) { PageObjects::Components::Composer.new }
  let(:ai_helper_context_menu) { PageObjects::Components::AIHelperContextMenu.new }
  let(:diff_modal) { PageObjects::Modals::DiffModal.new }
  let(:ai_suggestion_dropdown) { PageObjects::Components::AISuggestionDropdown.new }
  fab!(:category) { Fabricate(:category) }
  fab!(:category_2) { Fabricate(:category) }
  fab!(:video) { Fabricate(:tag) }
  fab!(:music) { Fabricate(:tag) }
  fab!(:cloud) { Fabricate(:tag) }
  fab!(:feedback) { Fabricate(:tag) }
  fab!(:review) { Fabricate(:tag) }

  def trigger_context_menu(content)
    visit("/latest")
    page.find("#create-topic").click
    composer.fill_content(content)
    page.execute_script("document.querySelector('.d-editor-input')?.select();")
  end

  context "when triggering AI with context menu in composer" do
    it "shows the context menu when selecting a passage of text in the composer" do
      trigger_context_menu(input)
      expect(ai_helper_context_menu).to have_context_menu
    end

    it "does not show the context menu when selecting insuffient text" do
      visit("/latest")
      page.find("#create-topic").click
      composer.fill_content(input)
      page.execute_script(
        "const input = document.querySelector('.d-editor-input'); input.setSelectionRange(0, 2);",
      )
      expect(ai_helper_context_menu).to have_no_context_menu
    end

    it "shows context menu in 'trigger' state when first showing" do
      trigger_context_menu(input)
      expect(ai_helper_context_menu).to be_showing_triggers
    end

    it "shows prompt options in context menu when AI button is clicked" do
      trigger_context_menu(input)
      ai_helper_context_menu.click_ai_button
      expect(ai_helper_context_menu).to be_showing_options
    end

    it "closes the context menu when clicking outside" do
      trigger_context_menu(input)
      find(".d-editor-preview").click
      expect(ai_helper_context_menu).to have_no_context_menu
    end

    context "when using custom prompt" do
      let(:mode) { CompletionPrompt::CUSTOM_PROMPT }

      let(:custom_prompt_input) { "Translate to French" }
      let(:custom_prompt_response) { "La pluie en Espagne reste principalement dans l'avion." }

      it "shows custom prompt option" do
        trigger_context_menu(input)
        ai_helper_context_menu.click_ai_button
        expect(ai_helper_context_menu).to have_custom_prompt
      end

      it "enables the custom prompt button when input is filled" do
        trigger_context_menu(input)
        ai_helper_context_menu.click_ai_button
        expect(ai_helper_context_menu).to have_custom_prompt_button_disabled
        ai_helper_context_menu.fill_custom_prompt(custom_prompt_input)
        expect(ai_helper_context_menu).to have_custom_prompt_button_enabled
      end

      it "replaces the composed message with AI generated content" do
        trigger_context_menu(input)
        ai_helper_context_menu.click_ai_button
        ai_helper_context_menu.fill_custom_prompt(custom_prompt_input)

        DiscourseAi::Completions::LLM.with_prepared_responses([custom_prompt_response]) do
          ai_helper_context_menu.click_custom_prompt_button

          wait_for { composer.composer_input.value == custom_prompt_response }

          expect(composer.composer_input.value).to eq(custom_prompt_response)
        end
      end
    end

    context "when not a member of custom prompt group" do
      let(:mode) { CompletionPrompt::CUSTOM_PROMPT }
      before { SiteSetting.ai_helper_custom_prompts_allowed_groups = non_member_group.id.to_s }

      it "does not show custom prompt option" do
        trigger_context_menu(input)
        ai_helper_context_menu.click_ai_button
        expect(ai_helper_context_menu).to have_no_custom_prompt
      end
    end

    context "when using translation mode" do
      let(:mode) { CompletionPrompt::TRANSLATE }

      let(:spanish_input) { "La lluvia en España se queda principalmente en el avión." }

      it "replaces the composed message with AI generated content" do
        trigger_context_menu(spanish_input)
        ai_helper_context_menu.click_ai_button

        DiscourseAi::Completions::LLM.with_prepared_responses([input]) do
          ai_helper_context_menu.select_helper_model(mode)

          wait_for { composer.composer_input.value == input }

          expect(composer.composer_input.value).to eq(input)
        end
      end

      it "shows reset options after results are complete" do
        trigger_context_menu(spanish_input)
        ai_helper_context_menu.click_ai_button

        DiscourseAi::Completions::LLM.with_prepared_responses([input]) do
          ai_helper_context_menu.select_helper_model(mode)

          wait_for { composer.composer_input.value == input }

          ai_helper_context_menu.click_confirm_button
          expect(ai_helper_context_menu).to be_showing_resets
        end
      end

      it "reverts results when Undo button is clicked" do
        trigger_context_menu(spanish_input)
        ai_helper_context_menu.click_ai_button

        DiscourseAi::Completions::LLM.with_prepared_responses([input]) do
          ai_helper_context_menu.select_helper_model(mode)

          wait_for { composer.composer_input.value == input }

          ai_helper_context_menu.click_confirm_button
          ai_helper_context_menu.click_undo_button
          expect(composer.composer_input.value).to eq(spanish_input)
        end
      end

      it "reverts results when revert button is clicked" do
        trigger_context_menu(spanish_input)
        ai_helper_context_menu.click_ai_button

        DiscourseAi::Completions::LLM.with_prepared_responses([input]) do
          ai_helper_context_menu.select_helper_model(mode)

          wait_for { composer.composer_input.value == input }

          ai_helper_context_menu.click_revert_button
          expect(composer.composer_input.value).to eq(spanish_input)
        end
      end

      it "reverts results when Ctrl/Cmd + Z is pressed on the keyboard" do
        trigger_context_menu(spanish_input)
        ai_helper_context_menu.click_ai_button

        DiscourseAi::Completions::LLM.with_prepared_responses([input]) do
          ai_helper_context_menu.select_helper_model(mode)

          wait_for { composer.composer_input.value == input }

          ai_helper_context_menu.press_undo_keys
          expect(composer.composer_input.value).to eq(spanish_input)
        end
      end

      it "confirms the results when confirm button is pressed" do
        trigger_context_menu(spanish_input)
        ai_helper_context_menu.click_ai_button

        DiscourseAi::Completions::LLM.with_prepared_responses([input]) do
          ai_helper_context_menu.select_helper_model(mode)

          wait_for { composer.composer_input.value == input }

          ai_helper_context_menu.click_confirm_button
          expect(composer.composer_input.value).to eq(input)
        end
      end

      it "hides the context menu when pressing Escape on the keyboard" do
        trigger_context_menu(spanish_input)
        ai_helper_context_menu.click_ai_button
        ai_helper_context_menu.press_escape_key
        expect(ai_helper_context_menu).to have_no_context_menu
      end

      it "shows the changes in a modal when view changes button is pressed" do
        trigger_context_menu(spanish_input)
        ai_helper_context_menu.click_ai_button

        DiscourseAi::Completions::LLM.with_prepared_responses([input]) do
          ai_helper_context_menu.select_helper_model(mode)

          wait_for { composer.composer_input.value == input }

          ai_helper_context_menu.click_view_changes_button
          expect(diff_modal).to be_visible
          expect(diff_modal.old_value).to eq(spanish_input.gsub(/[[:space:]]+/, " ").strip)
          expect(diff_modal.new_value).to eq(
            input.gsub(/[[:space:]]+/, " ").gsub(/[‘’]/, "'").gsub(/[“”]/, '"').strip,
          )
          diff_modal.confirm_changes
          expect(ai_helper_context_menu).to be_showing_resets
        end
      end

      it "should not close the context menu when in review state" do
        trigger_context_menu(spanish_input)
        ai_helper_context_menu.click_ai_button

        DiscourseAi::Completions::LLM.with_prepared_responses([input]) do
          ai_helper_context_menu.select_helper_model(mode)

          wait_for { composer.composer_input.value == input }

          find(".d-editor-preview").click
          expect(ai_helper_context_menu).to have_context_menu
        end
      end
    end

    context "when using the proofreading mode" do
      let(:mode) { CompletionPrompt::PROOFREAD }

      let(:proofread_text) { "The rain in Spain, stays mainly in the Plane." }

      it "replaces the composed message with AI generated content" do
        trigger_context_menu(input)
        ai_helper_context_menu.click_ai_button

        DiscourseAi::Completions::LLM.with_prepared_responses([proofread_text]) do
          ai_helper_context_menu.select_helper_model(mode)

          wait_for { composer.composer_input.value == proofread_text }

          expect(composer.composer_input.value).to eq(proofread_text)
        end
      end
    end
  end

  context "when suggesting titles with AI title suggester" do
    let(:mode) { CompletionPrompt::GENERATE_TITLES }

    let(:titles) do
      "<item>Rainy Spain</item><item>Plane-Bound Delights</item><item>Mysterious Spain</item><item>Plane-Rain Chronicles</item><item>Unveiling Spain</item>"
    end

    it "opens a menu with title suggestions" do
      visit("/latest")
      page.find("#create-topic").click
      composer.fill_content(input)
      DiscourseAi::Completions::LLM.with_prepared_responses([titles]) do
        ai_suggestion_dropdown.click_suggest_titles_button

        wait_for { ai_suggestion_dropdown.has_dropdown? }

        expect(ai_suggestion_dropdown).to have_dropdown
      end
    end

    it "replaces the topic title with the selected title" do
      visit("/latest")
      page.find("#create-topic").click
      composer.fill_content(input)
      DiscourseAi::Completions::LLM.with_prepared_responses([titles]) do
        ai_suggestion_dropdown.click_suggest_titles_button

        wait_for { ai_suggestion_dropdown.has_dropdown? }

        ai_suggestion_dropdown.select_suggestion_by_value(1)
        expected_title = "Plane-Bound Delights"

        expect(find("#reply-title").value).to eq(expected_title)
      end
    end

    it "closes the menu when clicking outside" do
      visit("/latest")
      page.find("#create-topic").click
      composer.fill_content(input)

      DiscourseAi::Completions::LLM.with_prepared_responses([titles]) do
        ai_suggestion_dropdown.click_suggest_titles_button

        wait_for { ai_suggestion_dropdown.has_dropdown? }

        find(".d-editor-preview").click

        expect(ai_suggestion_dropdown).to have_no_dropdown
      end
    end

    it "only shows trigger button if there is sufficient content in the composer" do
      visit("/latest")
      page.find("#create-topic").click
      composer.fill_content("abc")

      expect(ai_suggestion_dropdown).to have_no_suggestion_button

      composer.fill_content(input)
      expect(ai_suggestion_dropdown).to have_suggestion_button
    end
  end

  context "when suggesting the category with AI category suggester" do
    before { SiteSetting.ai_embeddings_enabled = true }

    it "updates the category with the suggested category" do
      response =
        Category
          .take(3)
          .pluck(:slug)
          .map { |s| { name: s, score: rand(0.0...45.0) } }
          .sort { |h| h[:score] }
      DiscourseAi::AiHelper::SemanticCategorizer.any_instance.stubs(:categories).returns(response)
      visit("/latest")
      page.find("#create-topic").click
      composer.fill_content(input)
      ai_suggestion_dropdown.click_suggest_category_button
      wait_for { ai_suggestion_dropdown.has_dropdown? }

      suggestion = category_2.name
      ai_suggestion_dropdown.select_suggestion_by_name(category_2.slug)
      category_selector = page.find(".category-chooser summary")

      expect(category_selector["data-name"]).to eq(suggestion)
    end
  end

  context "when suggesting the tags with AI tag suggester" do
    before { SiteSetting.ai_embeddings_enabled = true }

    it "updates the tag with the suggested tag" do
      response =
        Tag
          .take(5)
          .pluck(:name)
          .map { |s| { name: s, score: rand(0.0...45.0) } }
          .sort { |h| h[:score] }
      DiscourseAi::AiHelper::SemanticCategorizer.any_instance.stubs(:tags).returns(response)

      visit("/latest")
      page.find("#create-topic").click
      composer.fill_content(input)

      ai_suggestion_dropdown.click_suggest_tags_button

      wait_for { ai_suggestion_dropdown.has_dropdown? }

      suggestion = ai_suggestion_dropdown.suggestion_name(0)
      ai_suggestion_dropdown.select_suggestion_by_value(0)
      tag_selector = page.find(".mini-tag-chooser summary")

      expect(tag_selector["data-name"]).to eq(suggestion)
    end
  end

  context "when AI helper is disabled" do
    let(:mode) { CompletionPrompt::GENERATE_TITLES }
    before { SiteSetting.composer_ai_helper_enabled = false }

    it "does not trigger AI context menu" do
      trigger_context_menu(input)
      expect(ai_helper_context_menu).to have_no_context_menu
    end

    it "does not trigger AI suggestion buttons" do
      visit("/latest")
      page.find("#create-topic").click
      composer.fill_content(input)
      expect(ai_suggestion_dropdown).to have_no_suggestion_button
    end
  end

  context "when user is not a member of AI helper allowed group" do
    let(:mode) { CompletionPrompt::GENERATE_TITLES }
    before { SiteSetting.ai_helper_allowed_groups = non_member_group.id.to_s }

    it "does not trigger AI context menu" do
      trigger_context_menu(input)
      expect(ai_helper_context_menu).to have_no_context_menu
    end

    it "does not trigger AI suggestion buttons" do
      visit("/latest")
      page.find("#create-topic").click
      composer.fill_content(input)
      expect(ai_suggestion_dropdown).to have_no_suggestion_button
    end
  end
end