defmodule Ami.Comment do
  use Ecto.Schema

  import Ecto.{
    Query,
    Changeset
  }

  alias Ami.{
    # Post,
    User,
    Like,
    Resource,
    CommentAttachment,
    Repo
  }

  schema "comments" do
    field(:body, :string)
    field(:commentable_type, :string)
    field(:commentable_id, :integer)
    field(:is_inappropriate, :boolean, default: false)
    field(:created_at, :utc_datetime)
    field(:updated_at, :utc_datetime)

    belongs_to(:user, User)
    belongs_to(:comment, __MODULE__, foreign_key: :main_comment_id)
    has_many(:likes, Like, foreign_key: :likeable_id)
    has_many(:resources, Resource, foreign_key: :resourceable_id)
    has_many(:subcomments, __MODULE__, foreign_key: :main_comment_id, on_delete: :delete_all)
    has_many(:comment_attachments, CommentAttachment, on_delete: :delete_all)
  end

  def preload_comments(struct, commentable_type) do
    struct
    |> Repo.preload(
      comments:
        from(
          c in __MODULE__,
          where: c.commentable_type == ^commentable_type,
          order_by: [desc: c.id],
          preload: [:comment_attachments, subcomments: [:likes, user: :profile]]
        )
    )
  end

  def preload_likes(comment), do: Like.preload_likes(comment, "Comment")

  def changeset(comment, params \\ %{}) do
    comment
    |> cast(params, [
      :created_at,
      :updated_at,
      :commentable_type,
      :commentable_id,
      :user_id,
      :body
    ])
    |> validate_required([:user_id, :commentable_id, :commentable_type, :body])
  end
end