defmodule Plausible.AuditTest do
  use Plausible

  on_ee do
    use Plausible.DataCase

    use Plausible.Teams.Test

    alias Plausible.Audit
    alias Plausible.Audit.Encoder
    alias Plausible.Audit.Entry
    alias Plausible.Audit.TestSchema

    describe "Audit.Encoder" do
      test "encodes integer, float, and bitstring as themselves" do
        assert Encoder.encode(42) == 42
        assert Encoder.encode(3.14) == 3.14
        assert Encoder.encode("hello") == "hello"
      end

      test "encodes atoms" do
        assert Encoder.encode(:foo) == "foo"
        assert Encoder.encode(nil) == nil
        assert Encoder.encode(true) == true
        assert Encoder.encode(false) == false
      end

      test "encodes Date, DateTime, NaiveDateTime, Time as strings" do
        dt = ~U[2024-06-01 12:00:00Z]
        date = ~D[2024-06-01]
        ndt = ~N[2024-06-01 12:00:00]
        time = ~T[12:00:00]
        assert Encoder.encode(dt) == to_string(dt)
        assert Encoder.encode(date) == to_string(date)
        assert Encoder.encode(ndt) == to_string(ndt)
        assert Encoder.encode(time) == to_string(time)
      end

      test "encodes lists recursively" do
        assert Encoder.encode([:foo, 1, "bar"]) == ["foo", 1, "bar"]
      end

      test "encodes map recursively" do
        map = %{foo: :bar, num: 1, nested: %{baz: :qux}}
        assert Encoder.encode(map) == %{foo: "bar", num: 1, nested: %{baz: "qux"}}
      end

      test "raises if association not loaded and not allowed" do
        map = %{
          assoc: %Ecto.Association.NotLoaded{
            __field__: :assoc,
            __owner__: DummyStruct,
            __cardinality__: :one
          },
          __allow_not_loaded__: []
        }

        assert_raise Audit.EncoderError, ~r/assoc association not loaded/, fn ->
          Encoder.encode(map)
        end
      end

      test "skips not loaded association if allowed" do
        map = %{
          assoc: %Ecto.Association.NotLoaded{
            __field__: :assoc,
            __owner__: DummyStruct,
            __cardinality__: :one
          },
          __allow_not_loaded__: [:assoc]
        }

        assert Encoder.encode(map) == %{}
      end

      test "enforcing schema association present" do
        assert_raise Audit.EncoderError, fn ->
          Audit.encode(%TestSchema.VariantWithAssociation{id: 1})
        end

        assert %{id: 1, team: "some"} =
                 Audit.encode(%TestSchema.VariantWithAssociation{id: 1, team: :some})

        assert %{id: 1} =
                 Audit.encode(%TestSchema.VariantWithAssociationAllowNotLoaded{id: 1})

        assert %{id: 1, team: "some"} =
                 Audit.encode(%TestSchema.VariantWithAssociationAllowNotLoaded{
                   id: 1,
                   team: :some
                 })
      end

      test "returns data if only data is present" do
        data = %{foo: :bar}
        changeset = %Ecto.Changeset{data: data, changes: %{}}
        assert Encoder.encode(changeset) == %{foo: "bar"}
      end

      test "returns changes if only changes are present" do
        changes = %{foo: :baz}
        changeset = %Ecto.Changeset{data: %{}, changes: changes}
        assert Encoder.encode(changeset) == %{foo: "baz"}
      end

      test "returns empty map if both data and changes are empty" do
        changeset = %Ecto.Changeset{data: %{}, changes: %{}}
        assert Encoder.encode(changeset) == %{}
      end

      test "returns before/after map if both data and changes are present" do
        data = %{foo: :bar}
        changes = %{foo: :baz}
        changeset = %Ecto.Changeset{data: data, changes: changes}
        assert Encoder.encode(changeset) == %{before: %{foo: "bar"}, after: %{foo: "baz"}}
      end

      test "raises if encoder is not derived for a struct" do
        struct = %{__struct__: Foo, foo: 1, bar: 2}

        assert_raise Protocol.UndefinedError, fn ->
          Encoder.encode(struct)
        end
      end
    end

    describe "Audit.Entry" do
      test "changeset/2 with valid params and context" do
        Entry.set_context(%{current_user: %{id: 42}, current_team: %{id: 7}})
        params = %{entity: "User", entity_id: "42", meta: %{name: "bar"}}
        cs = Entry.changeset("login", params)
        assert cs.valid?
        assert cs.data.name == "login"
        assert cs.changes.entity == "User"
        assert cs.changes.entity_id == "42"
        assert cs.changes.meta == %{name: "bar"}
        assert cs.changes.user_id == 42
        assert cs.changes.team_id == 7
        assert cs.changes.actor_type == :user
        assert is_struct(cs.changes.datetime, NaiveDateTime)
      end

      test "changeset/2 missing required fields" do
        cs = Entry.changeset("test", %{})
        refute cs.valid?

        assert cs.errors == [
                 entity: {"can't be blank", [validation: :required]},
                 entity_id: {"can't be blank", [validation: :required]}
               ]
      end

      test "changeset/2 with missing context" do
        cs = Entry.changeset("test", %{entity: "E", entity_id: "1"})
        assert is_nil(cs.changes.user_id)
        assert is_nil(cs.changes.team_id)
        assert cs.data.user_id == 0
        assert cs.data.team_id == 0
        assert cs.data.actor_type == :system
      end

      test "new/3 with struct and params" do
        Entry.set_context(%{current_user: %{id: 1}, current_team: %{id: 2}})
        struct = %TestSchema{id: 123}
        cs = Entry.new("test", struct, %{meta: %{x: 1}})
        assert cs.changes.entity == "Plausible.Audit.TestSchema"
        assert cs.changes.entity_id == "123"
        assert cs.changes.meta == %{x: 1}
      end

      test "include_change/2 encodes changeset" do
        struct = %TestSchema{id: 1, name: "bar"}
        changeset = Ecto.Changeset.change(struct, name: "baz")

        entry = Entry.new("update", struct)
        entry = Entry.include_change(entry, changeset)
        assert entry.changes.change == %{after: %{name: "baz"}, before: %{name: "bar", id: 1}}
      end

      test "include_change/2 accepts raw map" do
        struct = %TestSchema{id: 1, name: "bar"}

        entry = Entry.new("update", struct)
        entry = Entry.include_change(entry, %{foo: :bar})
        assert entry.changes.change == %{foo: :bar}
      end
    end

    describe "Repo integration" do
      test "update_with_audit/2" do
        user = new_user() |> Repo.preload([:sso_integration, :sso_domain])

        cs = Plausible.Auth.User.name_changeset(user, %{name: "John Doe"})

        assert {:ok, %Plausible.Auth.User{name: "John Doe"}} =
                 Repo.update_with_audit(cs, "user_update")

        assert [
                 %Plausible.Audit.Entry{
                   name: "user_update",
                   change: %{
                     "after" => %{"name" => "John Doe"},
                     "before" => %{
                       "name" => "Jane Smith"
                     }
                   }
                 }
               ] = Audit.list_entries(entity: "Plausible.Auth.User", entity_id: "#{user.id}")
      end
    end

    test "update_with_audit!/2" do
      user = new_user() |> Repo.preload([:sso_integration, :sso_domain])
      cs = Plausible.Auth.User.name_changeset(user, %{name: "John Doe"})

      assert %Plausible.Auth.User{name: "John Doe"} =
               Repo.update_with_audit!(cs, "user_update")

      assert [
               %Plausible.Audit.Entry{
                 name: "user_update",
                 change: %{
                   "after" => %{"name" => "John Doe"},
                   "before" => %{
                     "name" => "Jane Smith"
                   }
                 }
               }
             ] = Audit.list_entries(entity: "Plausible.Auth.User", entity_id: "#{user.id}")
    end

    test "insert_with_audit/2" do
      changeset =
        Plausible.Auth.User.new(%{
          name: "Jane Doe",
          email: "jane@example.com",
          password: "very-secret-and-very-long-123",
          password_confirmation: "very-secret-and-very-long-123"
        })

      {:ok, %Plausible.Auth.User{id: user_id, name: "Jane Doe"} = user} =
        Repo.insert_with_audit(changeset, "user_insert")

      entity_id = to_string(user_id)

      assert [
               %Plausible.Audit.Entry{
                 name: "user_insert",
                 entity_id: ^entity_id,
                 change: %{
                   "email" => "jane@example.com",
                   "email_verified" => false,
                   "id" => ^user_id,
                   "last_team_identifier" => nil,
                   "name" => "Jane Doe",
                   "previous_email" => nil,
                   "totp_enabled" => false
                 }
               }
             ] = Audit.list_entries(entity: "Plausible.Auth.User", entity_id: "#{user.id}")
    end

    test "insert_with_audit!/2" do
      changeset =
        Plausible.Auth.User.new(%{
          name: "Jane Doe",
          email: "jane@example.com",
          password: "very-secret-and-very-long-123",
          password_confirmation: "very-secret-and-very-long-123"
        })

      assert %Plausible.Auth.User{name: "Jane Doe", id: user_id} =
               Repo.insert_with_audit!(changeset, "user_insert")

      assert [
               %Plausible.Audit.Entry{
                 name: "user_insert",
                 change: %{}
               }
             ] = Audit.list_entries(entity: "Plausible.Auth.User", entity_id: "#{user_id}")
    end

    test "delete_with_audit!/2" do
      user = new_user()
      user_email = user.email
      user_id = user.id
      assert %Plausible.Auth.User{} = Repo.delete_with_audit!(user, "user_delete")

      assert [
               %Plausible.Audit.Entry{
                 name: "user_delete",
                 change: %{
                   "email" => ^user_email,
                   "email_verified" => true,
                   "id" => ^user_id,
                   "last_team_identifier" => nil,
                   "name" => "Jane Smith",
                   "previous_email" => nil,
                   "totp_enabled" => false
                 }
               }
             ] = Audit.list_entries(entity: "Plausible.Auth.User", entity_id: "#{user.id}")
    end
  end
end
