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defmodule MedicodeWeb.Components.TranscriptionTextCodingsComponent do
  @moduledoc """
  Represents a portion of transcribed text.
  """
  use Phoenix.Component
  use MedicodeWeb, :live_component
  use MedicodeWeb, :verified_routes

  import Ecto.Query

  alias Medicode.Transcriptions.TranscriptionChunkCodeVector
  alias Medicode.Utilities
  alias Medicode.Repo

  @impl Phoenix.LiveComponent
  def update_many(assigns_sockets) do
    list_of_ids = Enum.map(assigns_sockets, fn {assigns, _sockets} -> assigns.chunk_id end)

    current_user =
      assigns_sockets
      |> Enum.at(0)
      |> Tuple.to_list()
      |> Enum.at(0)
      |> Map.get(:current_user)

    code_feedbacks =
      from(
        f in Medicode.Feedback.CodeFeedback,
        right_join: c in assoc(f, :transcription_chunk_code_vectors),
        where: f.user_id == ^current_user.id and f.transcription_chunk_id in ^list_of_ids,
        order_by: [desc: c.cosine_similarity, asc: c.id],
        select: [:code_vector_id, :response, :transcription_chunk_id]
      )
      |> Repo.all()

    transcription_chunk_code_vectors =
      TranscriptionChunkCodeVector
      |> join(:inner, [c], v in assoc(c, :code_vector))
      |> where([c], c.transcription_chunk_id in ^list_of_ids)
      |> order_by([c], desc: c.cosine_similarity, asc: c.id)
      |> preload([:code_vector, :assigned_by_user])
      |> Repo.all()

    Enum.map(assigns_sockets, fn {assigns, socket} ->
      chunk_code_vectors_with_feedback =
        transcription_chunk_code_vectors
        |> Enum.filter(&(&1.transcription_chunk_id == assigns.chunk_id))
        |> Enum.reduce([], fn item, acc ->
          transcription_chunk_code_feedback =
            Enum.find(code_feedbacks, fn code_feedback ->
              code_feedback.transcription_chunk_id == item.transcription_chunk_id &&
                code_feedback.code_vector_id == item.code_vector_id
            end)

          acc ++
            [
              %{
                transcription_chunk_code_vector: item,
                code_feedback: transcription_chunk_code_feedback
              }
            ]
        end)

      socket
      |> assign(:id, "#{assigns.id}-codings")
      |> assign(:current_user, assigns.current_user)
      |> assign(:chunk_code_vectors_with_feedback, chunk_code_vectors_with_feedback)
      |> assign(:chunk_id, assigns.chunk_id)
      |> assign(:text, assigns.text)
      |> assign(:on_feedback, assigns.on_feedback)
      |> assign(:on_remove_code, assigns.on_remove_code)
      |> assign(:on_finalize_code, assigns.on_finalize_code)
    end)
  end

  @impl Phoenix.LiveComponent
  def render(assigns) do
    ~H"""
    <div id={@id}>
      <p :if={is_nil(@chunk_code_vectors_with_feedback)}>No code vectors</p>
      <.tag_result
        :for={
          %{
            transcription_chunk_code_vector: transcription_chunk_code_vector,
            code_feedback: code_feedback
          } <- @chunk_code_vectors_with_feedback
        }
        transcription_chunk_code_vector={transcription_chunk_code_vector}
        chunk_id={@chunk_id}
        code_vector={transcription_chunk_code_vector.code_vector}
        score={1.0}
        text={@text}
        weighting={[1.0]}
        current_user={@current_user}
        myself={@myself}
        code_feedback={code_feedback}
        assigned_by_user={transcription_chunk_code_vector.assigned_by_user}
      />
    </div>
    """
  end

  def tag_result(assigns) do
    ~H"""
    <div class="group ease-out duration-300 transition-all flex items-center gap-4 px-[14px] py-3 text-sm">
      <div class="flex gap-3">
        <.feedback_button
          chunk_id={@chunk_id}
          code_feedback={@code_feedback}
          code_vector={@code_vector}
          text={@text}
          response="true"
          myself={@myself}
        />
        <.feedback_button
          chunk_id={@chunk_id}
          code_feedback={@code_feedback}
          code_vector={@code_vector}
          text={@text}
          response="false"
          myself={@myself}
        />
      </div>

      <div class="w-1 h-full border-l border-[#444444]/20"></div>

      <div
        id={"chunk-#{@chunk_id}-coding-#{@code_vector.id}"}
        class={"w-full flex flex-col gap-1 font-secondary text-type-black-primary ml-4 px-2 py-1 rounded #{code_color(@weighting)}"}
        title={code_title(@score, @weighting)}
      >
        <div class="flex flex-row justify-between">
          <p class="text-lg font-bold leading-[22.97px]"><%= @code_vector.code %></p>
          <button
            :if={is_nil(@transcription_chunk_code_vector.finalized_at)}
            type="button"
            class="transition-all duration-300 opacity-0 group-hover:opacity-100 hover:bg-slate-200 px-2 border border-1 border-iron-mountain rounded-md"
            phx-click="finalize_code"
            phx-value-chunk_id={@chunk_id}
            phx-value-code_vector_id={@code_vector.id}
            phx-target={@myself}
          >
            Finalize
          </button>
          <button
            :if={!is_nil(@transcription_chunk_code_vector.finalized_at)}
            type="button"
            class="transition-all duration-300 opacity-0 group-hover:opacity-100 hover:bg-slate-200 px-2 border border-1 border-iron-mountain rounded-md"
            phx-click="finalize_code"
            phx-value-chunk_id={@chunk_id}
            phx-value-code_vector_id={@code_vector.id}
            phx-target={@myself}
            title="Clear"
          >
            <.icon name="hero-check-badge" class="opacity-40 group-hover:opacity-70" />
          </button>
        </div>
        <p class="text-base leading-[20.42px]"><%= @code_vector.description %></p>
        <div class="flex flex-row items-center w-full gap-4">
          <p :if={!is_nil(@assigned_by_user)} class="text-xs text-base leading-[20.42px]">
            Assigned by: <%= @assigned_by_user.email %>
          </p>
          <button
            :if={
              !is_nil(@assigned_by_user) && String.equivalent?(@assigned_by_user.id, @current_user.id)
            }
            phx-target={@myself}
            phx-click="remove_code"
            phx-value-code_vector_id={@code_vector.id}
            phx-value-chunk_id={@chunk_id}
            type="button"
            aria-label={gettext("close")}
          >
            <.icon name="hero-x-mark-solid" class="opacity-40 group-hover:opacity-70" />
          </button>
        </div>
      </div>
    </div>
    """
  end

  # Supporting function for displaying a button to provide feedback in `tag_result/1`
  defp feedback_button(assigns) do
    ~H"""
    <button
      data-feedback={data_feedback_for_code_vector(@code_feedback, @response)}
      class="border-1 border-iron-mountain data-[feedback=positive]:bg-accepted-primary data-[feedback=positive]:border-accepted-secondary data-[feedback=negative]:bg-rejected-primary data-[feedback=negative]:border-rejected-secondary p-2 border border-button-deactivated-background rounded-lg hover:bg-slate-200"
      phx-click="toggle_feedback"
      phx-value-chunk_id={@chunk_id}
      phx-value-code_vector_id={@code_vector.id}
      phx-value-text={@text}
      phx-value-response={@response}
      phx-target={@myself}
      type="button"
    >
      <img
        :if={@response == "true"}
        src={~p"/images/thumbs-up.svg"}
        width="20"
        height="20"
        class="w-5 h-5 min-w-[20px]"
      />
      <img
        :if={@response == "false"}
        src={~p"/images/thumbs-down.svg"}
        width="20"
        height="20"
        class="w-5 h-5 min-w-[20px]"
      />
    </button>
    """
  end

  @impl Phoenix.LiveComponent
  def handle_event("toggle_feedback", params, socket) do
    socket.assigns.on_feedback.(params)
    {:noreply, socket}
  end

  def handle_event("remove_code", params, socket) do
    socket.assigns.on_remove_code.(params)
    {:noreply, socket}
  end

  def handle_event("finalize_code", params, socket) do
    socket.assigns.on_finalize_code.(params)
    {:noreply, socket}
  end

  # Supporting function for determining background color for code in `tag_result/1`
  defp code_color(weighting) do
    cond do
      :positive in weighting and :negative in weighting -> "bg-orange-200/40"
      :positive in weighting -> "bg-emerald-200/40"
      :negative in weighting -> "bg-red-200/40"
      true -> ""
    end
  end

  # Supporting function for building title attribute for code in `tag_result/1`
  defp code_title(score, weighting) do
    weighting_description =
      if length(weighting) > 0 do
        weighting
        |> Utilities.tally()
        |> Utilities.tally_to_string()
        |> String.replace_prefix("", "Weighting: ")
      else
        ""
      end

    "Similarity score: #{trunc(score * 100) / 100}. #{weighting_description}"
  end

  defp data_feedback_for_code_vector(
         %Medicode.Feedback.CodeFeedback{response: true},
         "true" = _response
       ),
       do: :positive

  defp data_feedback_for_code_vector(
         %Medicode.Feedback.CodeFeedback{response: false},
         "false" = _response
       ),
       do: :negative

  defp data_feedback_for_code_vector(_, _), do: nil
end