defmodule WandererApp.Map.Operations.SystemsTest do
  use WandererApp.DataCase

  alias WandererApp.Map.Operations.Systems
  alias WandererApp.MapTestHelpers
  alias WandererAppWeb.Factory

  describe "parameter validation" do
    test "validates missing connection assigns for create_system" do
      conn = %{assigns: %{}}
      attrs = %{"solar_system_id" => "30000142"}

      result = Systems.create_system(conn, attrs)
      assert {:error, :missing_params} = result
    end

    test "validates missing connection assigns for update_system" do
      conn = %{assigns: %{}}
      attrs = %{"position_x" => "150"}

      result = Systems.update_system(conn, 30_000_142, attrs)
      assert {:error, :missing_params} = result
    end

    test "validates missing connection assigns for delete_system" do
      conn = %{assigns: %{}}

      result = Systems.delete_system(conn, 30_000_142)
      assert {:error, :missing_params} = result
    end

    test "validates missing connection assigns for upsert_systems_and_connections" do
      conn = %{assigns: %{}}
      systems = []
      connections = []

      result = Systems.upsert_systems_and_connections(conn, systems, connections)
      assert {:error, :missing_params} = result
    end
  end

  describe "bulk operations" do
    test "handles empty systems and connections lists" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      systems = []
      connections = []

      MapTestHelpers.expect_map_server_error(fn ->
        result = Systems.upsert_systems_and_connections(conn, systems, connections)

        case result do
          {:ok, %{systems: %{created: 0, updated: 0}, connections: %{created: 0, updated: 0}}} ->
            :ok

          # Error is acceptable for testing
          {:error, _} ->
            :ok
        end
      end)
    end
  end

  describe "core functions with real implementations" do
    test "list_systems/1 function exists and handles map_id parameter" do
      map_id = Ecto.UUID.generate()

      # Should not crash, actual behavior depends on database state
      result = Systems.list_systems(map_id)
      assert is_list(result)
    end

    test "get_system/2 function exists and handles parameters" do
      map_id = Ecto.UUID.generate()
      system_id = 30_000_142

      # Should not crash, actual behavior depends on database state
      result = Systems.get_system(map_id, system_id)
      assert is_tuple(result)
    end

    test "create_system validates integer solar_system_id parameter" do
      map_id = Ecto.UUID.generate()
      user_id = Ecto.UUID.generate()
      char_id = "123456789"

      conn = %{
        assigns: %{
          map_id: map_id,
          owner_character_id: char_id,
          owner_user_id: user_id
        }
      }

      # Test with valid integer string
      params_valid = %{
        "solar_system_id" => "30000142",
        "position_x" => "100",
        "position_y" => "200"
      }

      # This should not crash on parameter parsing
      MapTestHelpers.expect_map_server_error(fn ->
        result = Systems.create_system(conn, params_valid)
        # Result depends on underlying services, but function should handle the call
        assert is_tuple(result)
      end)

      # Test with invalid solar_system_id
      params_invalid = %{
        "solar_system_id" => "invalid",
        "position_x" => "100",
        "position_y" => "200"
      }

      MapTestHelpers.expect_map_server_error(fn ->
        result_invalid = Systems.create_system(conn, params_invalid)
        # Should handle invalid parameter gracefully
        assert is_tuple(result_invalid)
      end)
    end

    test "update_system handles coordinate parsing" do
      map_id = Ecto.UUID.generate()
      system_id = 30_000_142

      conn = %{assigns: %{map_id: map_id}}

      # Test with string coordinates that should parse to integers
      attrs = %{
        "position_x" => "150",
        "position_y" => "250"
      }

      result = Systems.update_system(conn, system_id, attrs)
      # Function should handle coordinate parsing
      assert is_tuple(result)

      # Test with invalid coordinates
      attrs_invalid = %{
        "position_x" => "invalid",
        "position_y" => "250"
      }

      result_invalid = Systems.update_system(conn, system_id, attrs_invalid)
      # Should handle invalid coordinates gracefully
      assert is_tuple(result_invalid)
    end

    test "delete_system handles system_id parameter" do
      map_id = Ecto.UUID.generate()
      user_id = Ecto.UUID.generate()
      char_id = "123456789"
      system_id = 30_000_142

      conn = %{
        assigns: %{
          map_id: map_id,
          owner_character_id: char_id,
          owner_user_id: user_id
        }
      }

      MapTestHelpers.expect_map_server_error(fn ->
        result = Systems.delete_system(conn, system_id)
        # Function should handle the call
        assert is_tuple(result)
      end)
    end

    test "upsert_systems_and_connections processes empty lists correctly" do
      map_id = Ecto.UUID.generate()
      user_id = Ecto.UUID.generate()
      char_id = "123456789"

      conn = %{
        assigns: %{
          map_id: map_id,
          owner_character_id: char_id,
          owner_user_id: user_id
        }
      }

      # Test with non-empty data to exercise more code paths
      systems = [
        %{
          "solar_system_id" => 30_000_142,
          "position_x" => 100,
          "position_y" => 200
        }
      ]

      connections = [
        %{
          "solar_system_source" => 30_000_142,
          "solar_system_target" => 30_000_143
        }
      ]

      MapTestHelpers.expect_map_server_error(fn ->
        result = Systems.upsert_systems_and_connections(conn, systems, connections)
        # Function should process the data and return a result
        assert is_tuple(result)

        # Verify the result structure when successful
        case result do
          {:ok, %{systems: sys_result, connections: conn_result}} ->
            assert Map.has_key?(sys_result, :created)
            assert Map.has_key?(sys_result, :updated)
            assert Map.has_key?(conn_result, :created)
            assert Map.has_key?(conn_result, :updated)

          _ ->
            # Other result types are also valid depending on underlying state
            :ok
        end
      end)
    end

    test "internal helper functions work correctly" do
      # Test coordinate normalization by creating a system with coordinates
      _params_with_coords = %{
        "position_x" => 100,
        "position_y" => 200
      }

      # Test solar system ID parsing
      system_id_valid = "30000142"
      _system_id_invalid = "invalid"

      # These are internal functions tested indirectly through public API
      # The main goal is to exercise code paths that use these helpers

      # Test that functions can handle various input formats
      map_id = Ecto.UUID.generate()
      user_id = Ecto.UUID.generate()
      char_id = "123456789"

      conn_valid = %{
        assigns: %{
          map_id: map_id,
          owner_character_id: char_id,
          owner_user_id: user_id
        }
      }

      # This will exercise the fetch_system_id and normalize_coordinates functions
      params_various_formats = [
        %{"solar_system_id" => system_id_valid, "position_x" => 100, "position_y" => 200},
        %{"solar_system_id" => system_id_valid, "position_x" => "150", "position_y" => "250"},
        %{solar_system_id: 30_000_142, position_x: 300, position_y: 400}
      ]

      Enum.each(params_various_formats, fn params ->
        MapTestHelpers.expect_map_server_error(fn ->
          result = Systems.create_system(conn_valid, params)
          # Each call should handle the parameter format
          assert is_tuple(result)
        end)
      end)
    end
  end
end
