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

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

  describe "parameter validation" do
    test "validates missing connection assigns for create_signature" do
      conn = %{assigns: %{}}
      params = %{"solar_system_id" => 30_000_142}

      result = Signatures.create_signature(conn, params)
      assert {:error, :missing_params} = result
    end

    test "validates missing connection assigns for update_signature" do
      conn = %{assigns: %{}}
      sig_id = Ecto.UUID.generate()
      params = %{"name" => "Updated Name"}

      result = Signatures.update_signature(conn, sig_id, params)
      assert {:error, :missing_params} = result
    end

    test "validates missing connection assigns for delete_signature" do
      conn = %{assigns: %{}}
      sig_id = Ecto.UUID.generate()

      result = Signatures.delete_signature(conn, sig_id)
      assert {:error, :missing_params} = result
    end

    test "validates missing solar_system_id for create_signature" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      # Missing solar_system_id
      params = %{"eve_id" => "ABC-123"}

      result = Signatures.create_signature(conn, params)
      assert {:error, :missing_params} = result
    end

    test "validates partial connection assigns for create_signature" do
      # Test with incomplete assigns - missing owner_user_id
      conn_incomplete1 = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789"
        }
      }

      params = %{"solar_system_id" => "30000142", "eve_id" => "ABC-123"}

      result = Signatures.create_signature(conn_incomplete1, params)
      assert {:error, :missing_params} = result

      # Test with incomplete assigns - missing owner_character_id
      conn_incomplete2 = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_user_id: Ecto.UUID.generate()
        }
      }

      result2 = Signatures.create_signature(conn_incomplete2, params)
      assert {:error, :missing_params} = result2

      # Test with incomplete assigns - missing map_id
      conn_incomplete3 = %{
        assigns: %{
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      result3 = Signatures.create_signature(conn_incomplete3, params)
      assert {:error, :missing_params} = result3
    end

    test "validates partial connection assigns for update_signature" do
      sig_id = Ecto.UUID.generate()
      params = %{"name" => "Updated Name"}

      # Test various incomplete assign combinations
      incomplete_assigns = [
        %{map_id: Ecto.UUID.generate(), owner_character_id: "123456789"},
        %{map_id: Ecto.UUID.generate(), owner_user_id: Ecto.UUID.generate()},
        %{owner_character_id: "123456789", owner_user_id: Ecto.UUID.generate()}
      ]

      Enum.each(incomplete_assigns, fn assigns ->
        conn = %{assigns: assigns}
        result = Signatures.update_signature(conn, sig_id, params)
        assert {:error, :missing_params} = result
      end)
    end

    test "validates partial connection assigns for delete_signature" do
      sig_id = Ecto.UUID.generate()

      # Test various incomplete assign combinations
      incomplete_assigns = [
        %{map_id: Ecto.UUID.generate(), owner_character_id: "123456789"},
        %{map_id: Ecto.UUID.generate(), owner_user_id: Ecto.UUID.generate()},
        %{owner_character_id: "123456789", owner_user_id: Ecto.UUID.generate()}
      ]

      Enum.each(incomplete_assigns, fn assigns ->
        conn = %{assigns: assigns}
        result = Signatures.delete_signature(conn, sig_id)
        assert {:error, :missing_params} = result
      end)
    end
  end

  describe "function exists and module structure" do
    test "module defines expected functions" do
      # Test that the module has the expected public functions
      functions = Signatures.__info__(:functions)

      assert Keyword.has_key?(functions, :list_signatures)
      assert Keyword.has_key?(functions, :create_signature)
      assert Keyword.has_key?(functions, :update_signature)
      assert Keyword.has_key?(functions, :delete_signature)
    end

    test "list_signatures/1 returns list for any input" do
      map_id = Ecto.UUID.generate()

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

    test "module has correct function arities" do
      functions = Signatures.__info__(:functions)

      assert functions[:list_signatures] == 1
      assert functions[:create_signature] == 2
      assert functions[:update_signature] == 3
      assert functions[:delete_signature] == 2
    end
  end

  describe "core functions with real implementations" do
    test "list_signatures handles different map_id types" do
      # Test with various map_id formats
      map_id_formats = [
        Ecto.UUID.generate(),
        "string-map-id",
        "123456789",
        nil
      ]

      Enum.each(map_id_formats, fn map_id ->
        result = Signatures.list_signatures(map_id)
        assert is_list(result)
      end)
    end

    test "create_signature with valid connection assigns" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      params = %{
        "solar_system_id" => "30000142",
        "eve_id" => "ABC-123",
        "name" => "Test Signature",
        "kind" => "Wormhole",
        "group" => "Unknown"
      }

      MapTestHelpers.expect_map_server_error(fn ->
        result = Signatures.create_signature(conn, params)
        # If no exception, check the result
        assert is_tuple(result)

        case result do
          {:ok, data} ->
            assert is_map(data)
            assert Map.has_key?(data, "character_eve_id")

          {:error, _} ->
            # Error is acceptable for testing without proper setup
            :ok
        end
      end)
    end

    test "create_signature with minimal parameters" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      # Test with minimal required parameters
      params = %{"solar_system_id" => 30_000_142}

      MapTestHelpers.expect_map_server_error(fn ->
        result = Signatures.create_signature(conn, params)
        assert is_tuple(result)
      end)
    end

    test "update_signature with valid parameters" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      sig_id = Ecto.UUID.generate()

      params = %{
        "name" => "Updated Signature",
        "custom_info" => "Updated info",
        "description" => "Updated description"
      }

      result = Signatures.update_signature(conn, sig_id, params)
      assert is_tuple(result)

      case result do
        {:ok, data} ->
          assert is_map(data)

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

    test "update_signature with various parameter combinations" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      sig_id = Ecto.UUID.generate()

      # Test different parameter combinations
      param_combinations = [
        %{"name" => "New Name"},
        %{"kind" => "Data Site"},
        %{"group" => "Combat Site"},
        %{"type" => "Signature Type"},
        %{"custom_info" => "Custom information"},
        %{"description" => "Description text"},
        %{"linked_system_id" => "30000143"},
        # Empty parameters
        %{},
        %{"name" => "New Name", "kind" => "Wormhole", "group" => "Unknown"}
      ]

      Enum.each(param_combinations, fn params ->
        result = Signatures.update_signature(conn, sig_id, params)
        assert is_tuple(result)
      end)
    end

    test "delete_signature with valid connection" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      sig_id = Ecto.UUID.generate()

      result = Signatures.delete_signature(conn, sig_id)
      assert is_atom(result) or is_tuple(result)

      case result do
        :ok ->
          :ok

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

  describe "error handling scenarios" do
    test "create_signature handles various invalid parameters" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      # Test with various invalid parameter combinations
      invalid_params = [
        # Missing solar_system_id
        %{},
        %{"solar_system_id" => nil},
        %{"solar_system_id" => ""},
        %{"solar_system_id" => "invalid"},
        %{"solar_system_id" => []},
        %{"solar_system_id" => %{}}
      ]

      Enum.each(invalid_params, fn params ->
        MapTestHelpers.expect_map_server_error(fn ->
          result = Signatures.create_signature(conn, params)
          assert {:error, :missing_params} = result
        end)
      end)
    end

    test "update_signature handles invalid signature IDs" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      params = %{"name" => "Updated Name"}

      # Test with various invalid signature IDs
      invalid_sig_ids = [
        nil,
        "",
        "invalid-uuid",
        "123",
        [],
        %{}
      ]

      Enum.each(invalid_sig_ids, fn sig_id ->
        result = Signatures.update_signature(conn, sig_id, params)
        assert is_tuple(result)

        case result do
          {:ok, _} -> :ok
          {:error, _} -> :ok
        end
      end)
    end

    test "delete_signature handles invalid signature IDs" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      # Test with various invalid signature IDs
      invalid_sig_ids = [
        nil,
        "",
        "invalid-uuid",
        "123",
        [],
        %{}
      ]

      Enum.each(invalid_sig_ids, fn sig_id ->
        result = Signatures.delete_signature(conn, sig_id)
        assert is_atom(result) or is_tuple(result)
      end)
    end

    test "list_signatures handles edge cases" do
      # Test with various edge case map IDs
      edge_case_map_ids = [
        nil,
        "",
        "invalid-map-id",
        "00000000-0000-0000-0000-000000000000",
        [],
        %{}
      ]

      Enum.each(edge_case_map_ids, fn map_id ->
        result = Signatures.list_signatures(map_id)
        assert is_list(result)
      end)
    end

    test "create_signature handles malformed connection assigns" do
      # Test with various malformed assign structures
      malformed_conns = [
        %{assigns: nil},
        %{assigns: []},
        %{assigns: "invalid"},
        %{},
        nil
      ]

      params = %{"solar_system_id" => 30_000_142}

      Enum.each(malformed_conns, fn conn ->
        # This should either crash (expected) or return error
        try do
          result = Signatures.create_signature(conn, params)
          assert {:error, :missing_params} = result
        rescue
          _ ->
            # Exception is acceptable for malformed input
            :ok
        end
      end)
    end

    test "update_signature handles nil parameters" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      sig_id = Ecto.UUID.generate()

      # Test with nil parameters
      result = Signatures.update_signature(conn, sig_id, nil)
      assert is_tuple(result)
    end

    test "functions handle concurrent access" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      # Test concurrent access to create_signature
      # Since each Task.async runs in its own process and the map server throw
      # isn't caught across process boundaries, we test this differently
      tasks =
        Enum.map(1..3, fn i ->
          Task.async(fn ->
            params = %{"solar_system_id" => 30_000_140 + i}
            result = Signatures.create_signature(conn, params)
            # We expect either system_not_found (system doesn't exist in test) 
            # or the MapTestHelpers would have caught the map server error
            assert {:error, :system_not_found} = result
          end)
        end)

      # All tasks should complete without crashing
      Enum.each(tasks, &Task.await/1)
    end
  end

  describe "response structure validation" do
    test "create_signature returns proper response structure" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      params = %{
        "solar_system_id" => "30000142",
        "eve_id" => "ABC-123",
        "name" => "Test Signature"
      }

      MapTestHelpers.expect_map_server_error(fn ->
        result = Signatures.create_signature(conn, params)
        assert is_tuple(result)
        assert tuple_size(result) == 2

        {status, data} = result
        assert status in [:ok, :error]

        case status do
          :ok ->
            assert is_map(data)
            assert Map.has_key?(data, "character_eve_id")

          :error ->
            assert is_atom(data)
        end
      end)
    end

    test "update_signature returns proper response structure" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      sig_id = Ecto.UUID.generate()
      params = %{"name" => "Updated Name"}

      result = Signatures.update_signature(conn, sig_id, params)
      assert is_tuple(result)
      assert tuple_size(result) == 2

      {status, data} = result
      assert status in [:ok, :error]

      case status do
        :ok ->
          assert is_map(data)

        :error ->
          assert is_atom(data)
      end
    end

    test "delete_signature returns proper response structure" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      sig_id = Ecto.UUID.generate()

      result = Signatures.delete_signature(conn, sig_id)

      # Should return :ok or {:error, atom}
      case result do
        :ok ->
          :ok

        {:error, reason} ->
          assert is_atom(reason)

        other ->
          # Should be one of the expected formats
          flunk("Unexpected return format: #{inspect(other)}")
      end
    end

    test "list_signatures always returns a list" do
      map_ids = [
        Ecto.UUID.generate(),
        "string-id",
        nil,
        123
      ]

      Enum.each(map_ids, fn map_id ->
        result = Signatures.list_signatures(map_id)
        assert is_list(result)
      end)
    end
  end

  describe "parameter merging and character_eve_id injection" do
    test "create_signature injects character_eve_id correctly" do
      char_id = "987654321"

      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: char_id,
          owner_user_id: Ecto.UUID.generate()
        }
      }

      params = %{
        "solar_system_id" => "30000142",
        "eve_id" => "ABC-123"
      }

      MapTestHelpers.expect_map_server_error(fn ->
        result = Signatures.create_signature(conn, params)

        case result do
          {:ok, data} ->
            assert Map.get(data, "character_eve_id") == char_id

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

    test "update_signature merges parameters correctly" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      sig_id = Ecto.UUID.generate()

      # Test that the function exercises the parameter merging logic
      params = %{
        "name" => "New Name",
        "description" => "New Description",
        "custom_info" => "New Info"
      }

      MapTestHelpers.expect_map_server_error(fn ->
        result = Signatures.update_signature(conn, sig_id, params)
        assert is_tuple(result)
      end)
    end

    test "delete_signature builds removal structure correctly" do
      conn = %{
        assigns: %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        }
      }

      sig_id = Ecto.UUID.generate()

      # This tests that the function exercises the signature removal structure building
      MapTestHelpers.expect_map_server_error(fn ->
        result = Signatures.delete_signature(conn, sig_id)
        assert is_atom(result) or is_tuple(result)
      end)
    end

    test "functions handle different assign value types" do
      # Test with different types for character_id and user_id
      assign_variations = [
        %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: "123456789",
          owner_user_id: Ecto.UUID.generate()
        },
        %{
          map_id: Ecto.UUID.generate(),
          owner_character_id: 123_456_789,
          owner_user_id: Ecto.UUID.generate()
        }
      ]

      params = %{"solar_system_id" => 30_000_142}

      Enum.each(assign_variations, fn assigns ->
        conn = %{assigns: assigns}

        MapTestHelpers.expect_map_server_error(fn ->
          result = Signatures.create_signature(conn, params)
          assert is_tuple(result)
        end)
      end)
    end
  end
end
