defmodule Pleroma.Web.ActivityPub.ObjectValidatorTest do
  use Pleroma.DataCase

  alias Pleroma.Object
  alias Pleroma.Web.ActivityPub.ActivityPub
  alias Pleroma.Web.ActivityPub.Builder
  alias Pleroma.Web.ActivityPub.ObjectValidator
  alias Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator
  alias Pleroma.Web.ActivityPub.ObjectValidators.LikeValidator
  alias Pleroma.Web.ActivityPub.Utils
  alias Pleroma.Web.CommonAPI

  import Pleroma.Factory

  describe "attachments" do
    test "works with honkerific attachments" do
      attachment = %{
        "mediaType" => "",
        "name" => "",
        "summary" => "298p3RG7j27tfsZ9RQ.jpg",
        "type" => "Document",
        "url" => "https://honk.tedunangst.com/d/298p3RG7j27tfsZ9RQ.jpg"
      }

      assert {:ok, attachment} =
               AttachmentValidator.cast_and_validate(attachment)
               |> Ecto.Changeset.apply_action(:insert)

      assert attachment.mediaType == "application/octet-stream"
    end

    test "it turns mastodon attachments into our attachments" do
      attachment = %{
        "url" =>
          "http://mastodon.example.org/system/media_attachments/files/000/000/002/original/334ce029e7bfb920.jpg",
        "type" => "Document",
        "name" => nil,
        "mediaType" => "image/jpeg"
      }

      {:ok, attachment} =
        AttachmentValidator.cast_and_validate(attachment)
        |> Ecto.Changeset.apply_action(:insert)

      assert [
               %{
                 href:
                   "http://mastodon.example.org/system/media_attachments/files/000/000/002/original/334ce029e7bfb920.jpg",
                 type: "Link",
                 mediaType: "image/jpeg"
               }
             ] = attachment.url

      assert attachment.mediaType == "image/jpeg"
    end

    test "it handles our own uploads" do
      user = insert(:user)

      file = %Plug.Upload{
        content_type: "image/jpg",
        path: Path.absname("test/fixtures/image.jpg"),
        filename: "an_image.jpg"
      }

      {:ok, attachment} = ActivityPub.upload(file, actor: user.ap_id)

      {:ok, attachment} =
        attachment.data
        |> AttachmentValidator.cast_and_validate()
        |> Ecto.Changeset.apply_action(:insert)

      assert attachment.mediaType == "image/jpeg"
    end
  end

  describe "chat message create activities" do
    test "it is invalid if the object already exists" do
      user = insert(:user)
      recipient = insert(:user)
      {:ok, activity} = CommonAPI.post_chat_message(user, recipient, "hey")
      object = Object.normalize(activity, false)

      {:ok, create_data, _} = Builder.create(user, object.data, [recipient.ap_id])

      {:error, cng} = ObjectValidator.validate(create_data, [])

      assert {:object, {"The object to create already exists", []}} in cng.errors
    end

    test "it is invalid if the object data has a different `to` or `actor` field" do
      user = insert(:user)
      recipient = insert(:user)
      {:ok, object_data, _} = Builder.chat_message(recipient, user.ap_id, "Hey")

      {:ok, create_data, _} = Builder.create(user, object_data, [recipient.ap_id])

      {:error, cng} = ObjectValidator.validate(create_data, [])

      assert {:to, {"Recipients don't match with object recipients", []}} in cng.errors
      assert {:actor, {"Actor doesn't match with object actor", []}} in cng.errors
    end
  end

  describe "chat messages" do
    setup do
      clear_config([:instance, :remote_limit])
      user = insert(:user)
      recipient = insert(:user, local: false)

      {:ok, valid_chat_message, _} = Builder.chat_message(user, recipient.ap_id, "hey :firefox:")

      %{user: user, recipient: recipient, valid_chat_message: valid_chat_message}
    end

    test "let's through some basic html", %{user: user, recipient: recipient} do
      {:ok, valid_chat_message, _} =
        Builder.chat_message(
          user,
          recipient.ap_id,
          "hey <a href='https://example.org'>example</a> <script>alert('uguu')</script>"
        )

      assert {:ok, object, _meta} = ObjectValidator.validate(valid_chat_message, [])

      assert object["content"] ==
               "hey <a href=\"https://example.org\">example</a> alert(&#39;uguu&#39;)"
    end

    test "validates for a basic object we build", %{valid_chat_message: valid_chat_message} do
      assert {:ok, object, _meta} = ObjectValidator.validate(valid_chat_message, [])

      assert Map.put(valid_chat_message, "attachment", nil) == object
    end

    test "validates for a basic object with an attachment", %{
      valid_chat_message: valid_chat_message,
      user: user
    } do
      file = %Plug.Upload{
        content_type: "image/jpg",
        path: Path.absname("test/fixtures/image.jpg"),
        filename: "an_image.jpg"
      }

      {:ok, attachment} = ActivityPub.upload(file, actor: user.ap_id)

      valid_chat_message =
        valid_chat_message
        |> Map.put("attachment", attachment.data)

      assert {:ok, object, _meta} = ObjectValidator.validate(valid_chat_message, [])

      assert object["attachment"]
    end

    test "validates for a basic object with an attachment in an array", %{
      valid_chat_message: valid_chat_message,
      user: user
    } do
      file = %Plug.Upload{
        content_type: "image/jpg",
        path: Path.absname("test/fixtures/image.jpg"),
        filename: "an_image.jpg"
      }

      {:ok, attachment} = ActivityPub.upload(file, actor: user.ap_id)

      valid_chat_message =
        valid_chat_message
        |> Map.put("attachment", [attachment.data])

      assert {:ok, object, _meta} = ObjectValidator.validate(valid_chat_message, [])

      assert object["attachment"]
    end

    test "validates for a basic object with an attachment but without content", %{
      valid_chat_message: valid_chat_message,
      user: user
    } do
      file = %Plug.Upload{
        content_type: "image/jpg",
        path: Path.absname("test/fixtures/image.jpg"),
        filename: "an_image.jpg"
      }

      {:ok, attachment} = ActivityPub.upload(file, actor: user.ap_id)

      valid_chat_message =
        valid_chat_message
        |> Map.put("attachment", attachment.data)
        |> Map.delete("content")

      assert {:ok, object, _meta} = ObjectValidator.validate(valid_chat_message, [])

      assert object["attachment"]
    end

    test "does not validate if the message has no content", %{
      valid_chat_message: valid_chat_message
    } do
      contentless =
        valid_chat_message
        |> Map.delete("content")

      refute match?({:ok, _object, _meta}, ObjectValidator.validate(contentless, []))
    end

    test "does not validate if the message is longer than the remote_limit", %{
      valid_chat_message: valid_chat_message
    } do
      Pleroma.Config.put([:instance, :remote_limit], 2)
      refute match?({:ok, _object, _meta}, ObjectValidator.validate(valid_chat_message, []))
    end

    test "does not validate if the recipient is blocking the actor", %{
      valid_chat_message: valid_chat_message,
      user: user,
      recipient: recipient
    } do
      Pleroma.User.block(recipient, user)
      refute match?({:ok, _object, _meta}, ObjectValidator.validate(valid_chat_message, []))
    end

    test "does not validate if the actor or the recipient is not in our system", %{
      valid_chat_message: valid_chat_message
    } do
      chat_message =
        valid_chat_message
        |> Map.put("actor", "https://raymoo.com/raymoo")

      {:error, _} = ObjectValidator.validate(chat_message, [])

      chat_message =
        valid_chat_message
        |> Map.put("to", ["https://raymoo.com/raymoo"])

      {:error, _} = ObjectValidator.validate(chat_message, [])
    end

    test "does not validate for a message with multiple recipients", %{
      valid_chat_message: valid_chat_message,
      user: user,
      recipient: recipient
    } do
      chat_message =
        valid_chat_message
        |> Map.put("to", [user.ap_id, recipient.ap_id])

      assert {:error, _} = ObjectValidator.validate(chat_message, [])
    end

    test "does not validate if it doesn't concern local users" do
      user = insert(:user, local: false)
      recipient = insert(:user, local: false)

      {:ok, valid_chat_message, _} = Builder.chat_message(user, recipient.ap_id, "hey")
      assert {:error, _} = ObjectValidator.validate(valid_chat_message, [])
    end
  end

  describe "EmojiReacts" do
    setup do
      user = insert(:user)
      {:ok, post_activity} = CommonAPI.post(user, %{status: "uguu"})

      object = Pleroma.Object.get_by_ap_id(post_activity.data["object"])

      {:ok, valid_emoji_react, []} = Builder.emoji_react(user, object, "👌")

      %{user: user, post_activity: post_activity, valid_emoji_react: valid_emoji_react}
    end

    test "it validates a valid EmojiReact", %{valid_emoji_react: valid_emoji_react} do
      assert {:ok, _, _} = ObjectValidator.validate(valid_emoji_react, [])
    end

    test "it is not valid without a 'content' field", %{valid_emoji_react: valid_emoji_react} do
      without_content =
        valid_emoji_react
        |> Map.delete("content")

      {:error, cng} = ObjectValidator.validate(without_content, [])

      refute cng.valid?
      assert {:content, {"can't be blank", [validation: :required]}} in cng.errors
    end

    test "it is not valid with a non-emoji content field", %{valid_emoji_react: valid_emoji_react} do
      without_emoji_content =
        valid_emoji_react
        |> Map.put("content", "x")

      {:error, cng} = ObjectValidator.validate(without_emoji_content, [])

      refute cng.valid?

      assert {:content, {"must be a single character emoji", []}} in cng.errors
    end
  end

  describe "Undos" do
    setup do
      user = insert(:user)
      {:ok, post_activity} = CommonAPI.post(user, %{status: "uguu"})
      {:ok, like} = CommonAPI.favorite(user, post_activity.id)
      {:ok, valid_like_undo, []} = Builder.undo(user, like)

      %{user: user, like: like, valid_like_undo: valid_like_undo}
    end

    test "it validates a basic like undo", %{valid_like_undo: valid_like_undo} do
      assert {:ok, _, _} = ObjectValidator.validate(valid_like_undo, [])
    end

    test "it does not validate if the actor of the undo is not the actor of the object", %{
      valid_like_undo: valid_like_undo
    } do
      other_user = insert(:user, ap_id: "https://gensokyo.2hu/users/raymoo")

      bad_actor =
        valid_like_undo
        |> Map.put("actor", other_user.ap_id)

      {:error, cng} = ObjectValidator.validate(bad_actor, [])

      assert {:actor, {"not the same as object actor", []}} in cng.errors
    end

    test "it does not validate if the object is missing", %{valid_like_undo: valid_like_undo} do
      missing_object =
        valid_like_undo
        |> Map.put("object", "https://gensokyo.2hu/objects/1")

      {:error, cng} = ObjectValidator.validate(missing_object, [])

      assert {:object, {"can't find object", []}} in cng.errors
      assert length(cng.errors) == 1
    end
  end

  describe "deletes" do
    setup do
      user = insert(:user)
      {:ok, post_activity} = CommonAPI.post(user, %{status: "cancel me daddy"})

      {:ok, valid_post_delete, _} = Builder.delete(user, post_activity.data["object"])
      {:ok, valid_user_delete, _} = Builder.delete(user, user.ap_id)

      %{user: user, valid_post_delete: valid_post_delete, valid_user_delete: valid_user_delete}
    end

    test "it is valid for a post deletion", %{valid_post_delete: valid_post_delete} do
      {:ok, valid_post_delete, _} = ObjectValidator.validate(valid_post_delete, [])

      assert valid_post_delete["deleted_activity_id"]
    end

    test "it is invalid if the object isn't in a list of certain types", %{
      valid_post_delete: valid_post_delete
    } do
      object = Object.get_by_ap_id(valid_post_delete["object"])

      data =
        object.data
        |> Map.put("type", "Like")

      {:ok, _object} =
        object
        |> Ecto.Changeset.change(%{data: data})
        |> Object.update_and_set_cache()

      {:error, cng} = ObjectValidator.validate(valid_post_delete, [])
      assert {:object, {"object not in allowed types", []}} in cng.errors
    end

    test "it is valid for a user deletion", %{valid_user_delete: valid_user_delete} do
      assert match?({:ok, _, _}, ObjectValidator.validate(valid_user_delete, []))
    end

    test "it's invalid if the id is missing", %{valid_post_delete: valid_post_delete} do
      no_id =
        valid_post_delete
        |> Map.delete("id")

      {:error, cng} = ObjectValidator.validate(no_id, [])

      assert {:id, {"can't be blank", [validation: :required]}} in cng.errors
    end

    test "it's invalid if the object doesn't exist", %{valid_post_delete: valid_post_delete} do
      missing_object =
        valid_post_delete
        |> Map.put("object", "http://does.not/exist")

      {:error, cng} = ObjectValidator.validate(missing_object, [])

      assert {:object, {"can't find object", []}} in cng.errors
    end

    test "it's invalid if the actor of the object and the actor of delete are from different domains",
         %{valid_post_delete: valid_post_delete} do
      valid_user = insert(:user)

      valid_other_actor =
        valid_post_delete
        |> Map.put("actor", valid_user.ap_id)

      assert match?({:ok, _, _}, ObjectValidator.validate(valid_other_actor, []))

      invalid_other_actor =
        valid_post_delete
        |> Map.put("actor", "https://gensokyo.2hu/users/raymoo")

      {:error, cng} = ObjectValidator.validate(invalid_other_actor, [])

      assert {:actor, {"is not allowed to delete object", []}} in cng.errors
    end

    test "it's valid if the actor of the object is a local superuser",
         %{valid_post_delete: valid_post_delete} do
      user =
        insert(:user, local: true, is_moderator: true, ap_id: "https://gensokyo.2hu/users/raymoo")

      valid_other_actor =
        valid_post_delete
        |> Map.put("actor", user.ap_id)

      {:ok, _, meta} = ObjectValidator.validate(valid_other_actor, [])
      assert meta[:do_not_federate]
    end
  end

  describe "likes" do
    setup do
      user = insert(:user)
      {:ok, post_activity} = CommonAPI.post(user, %{status: "uguu"})

      valid_like = %{
        "to" => [user.ap_id],
        "cc" => [],
        "type" => "Like",
        "id" => Utils.generate_activity_id(),
        "object" => post_activity.data["object"],
        "actor" => user.ap_id,
        "context" => "a context"
      }

      %{valid_like: valid_like, user: user, post_activity: post_activity}
    end

    test "returns ok when called in the ObjectValidator", %{valid_like: valid_like} do
      {:ok, object, _meta} = ObjectValidator.validate(valid_like, [])

      assert "id" in Map.keys(object)
    end

    test "is valid for a valid object", %{valid_like: valid_like} do
      assert LikeValidator.cast_and_validate(valid_like).valid?
    end

    test "sets the 'to' field to the object actor if no recipients are given", %{
      valid_like: valid_like,
      user: user
    } do
      without_recipients =
        valid_like
        |> Map.delete("to")

      {:ok, object, _meta} = ObjectValidator.validate(without_recipients, [])

      assert object["to"] == [user.ap_id]
    end

    test "sets the context field to the context of the object if no context is given", %{
      valid_like: valid_like,
      post_activity: post_activity
    } do
      without_context =
        valid_like
        |> Map.delete("context")

      {:ok, object, _meta} = ObjectValidator.validate(without_context, [])

      assert object["context"] == post_activity.data["context"]
    end

    test "it errors when the actor is missing or not known", %{valid_like: valid_like} do
      without_actor = Map.delete(valid_like, "actor")

      refute LikeValidator.cast_and_validate(without_actor).valid?

      with_invalid_actor = Map.put(valid_like, "actor", "invalidactor")

      refute LikeValidator.cast_and_validate(with_invalid_actor).valid?
    end

    test "it errors when the object is missing or not known", %{valid_like: valid_like} do
      without_object = Map.delete(valid_like, "object")

      refute LikeValidator.cast_and_validate(without_object).valid?

      with_invalid_object = Map.put(valid_like, "object", "invalidobject")

      refute LikeValidator.cast_and_validate(with_invalid_object).valid?
    end

    test "it errors when the actor has already like the object", %{
      valid_like: valid_like,
      user: user,
      post_activity: post_activity
    } do
      _like = CommonAPI.favorite(user, post_activity.id)

      refute LikeValidator.cast_and_validate(valid_like).valid?
    end

    test "it works when actor or object are wrapped in maps", %{valid_like: valid_like} do
      wrapped_like =
        valid_like
        |> Map.put("actor", %{"id" => valid_like["actor"]})
        |> Map.put("object", %{"id" => valid_like["object"]})

      validated = LikeValidator.cast_and_validate(wrapped_like)

      assert validated.valid?

      assert {:actor, valid_like["actor"]} in validated.changes
      assert {:object, valid_like["object"]} in validated.changes
    end
  end

  describe "announces" do
    setup do
      user = insert(:user)
      announcer = insert(:user)
      {:ok, post_activity} = CommonAPI.post(user, %{status: "uguu"})

      object = Object.normalize(post_activity, false)
      {:ok, valid_announce, []} = Builder.announce(announcer, object)

      %{
        valid_announce: valid_announce,
        user: user,
        post_activity: post_activity,
        announcer: announcer
      }
    end

    test "returns ok for a valid announce", %{valid_announce: valid_announce} do
      assert {:ok, _object, _meta} = ObjectValidator.validate(valid_announce, [])
    end

    test "returns an error if the object can't be found", %{valid_announce: valid_announce} do
      without_object =
        valid_announce
        |> Map.delete("object")

      {:error, cng} = ObjectValidator.validate(without_object, [])

      assert {:object, {"can't be blank", [validation: :required]}} in cng.errors

      nonexisting_object =
        valid_announce
        |> Map.put("object", "https://gensokyo.2hu/objects/99999999")

      {:error, cng} = ObjectValidator.validate(nonexisting_object, [])

      assert {:object, {"can't find object", []}} in cng.errors
    end

    test "returns an error if we don't have the actor", %{valid_announce: valid_announce} do
      nonexisting_actor =
        valid_announce
        |> Map.put("actor", "https://gensokyo.2hu/users/raymoo")

      {:error, cng} = ObjectValidator.validate(nonexisting_actor, [])

      assert {:actor, {"can't find user", []}} in cng.errors
    end

    test "returns an error if the actor already announced the object", %{
      valid_announce: valid_announce,
      announcer: announcer,
      post_activity: post_activity
    } do
      _announce = CommonAPI.repeat(post_activity.id, announcer)

      {:error, cng} = ObjectValidator.validate(valid_announce, [])

      assert {:actor, {"already announced this object", []}} in cng.errors
      assert {:object, {"already announced by this actor", []}} in cng.errors
    end

    test "returns an error if the actor can't announce the object", %{
      announcer: announcer,
      user: user
    } do
      {:ok, post_activity} =
        CommonAPI.post(user, %{status: "a secret post", visibility: "private"})

      object = Object.normalize(post_activity, false)

      # Another user can't announce it
      {:ok, announce, []} = Builder.announce(announcer, object, public: false)

      {:error, cng} = ObjectValidator.validate(announce, [])

      assert {:actor, {"can not announce this object", []}} in cng.errors

      # The actor of the object can announce it
      {:ok, announce, []} = Builder.announce(user, object, public: false)

      assert {:ok, _, _} = ObjectValidator.validate(announce, [])

      # The actor of the object can not announce it publicly
      {:ok, announce, []} = Builder.announce(user, object, public: true)

      {:error, cng} = ObjectValidator.validate(announce, [])

      assert {:actor, {"can not announce this object publicly", []}} in cng.errors
    end
  end

  describe "updates" do
    setup do
      user = insert(:user)

      object = %{
        "id" => user.ap_id,
        "name" => "A new name",
        "summary" => "A new bio"
      }

      {:ok, valid_update, []} = Builder.update(user, object)

      %{user: user, valid_update: valid_update}
    end

    test "validates a basic object", %{valid_update: valid_update} do
      assert {:ok, _update, []} = ObjectValidator.validate(valid_update, [])
    end

    test "returns an error if the object can't be updated by the actor", %{
      valid_update: valid_update
    } do
      other_user = insert(:user)

      update =
        valid_update
        |> Map.put("actor", other_user.ap_id)

      assert {:error, _cng} = ObjectValidator.validate(update, [])
    end
  end
end