REPORT {{p}}sales_sum.

DATA gv_region TYPE {{p}}sale-region.

PARAMETERS p_from TYPE d OBLIGATORY.
SELECT-OPTIONS s_reg FOR gv_region.

CLASS lcl_report DEFINITION FINAL.
  PUBLIC SECTION.
    TYPES:
      BEGIN OF ty_line,
        region TYPE {{p}}sale-region,
        total  TYPE {{p}}sale-amount,
        count  TYPE i,
      END OF ty_line,
      tt_line TYPE STANDARD TABLE OF ty_line WITH EMPTY KEY.
    TYPES tt_region TYPE RANGE OF {{p}}sale-region.
    METHODS select_totals
      IMPORTING iv_from         TYPE d
                it_region       TYPE tt_region
      RETURNING VALUE(rt_lines) TYPE tt_line.
    METHODS display
      CHANGING ct_lines TYPE tt_line.
ENDCLASS.

CLASS lcl_report IMPLEMENTATION.
  METHOD select_totals.
    SELECT region, SUM( amount ) AS total, COUNT( * ) AS count
      FROM {{p}}sale
      WHERE sale_date >= @iv_from
        AND region IN @it_region
      GROUP BY region
      ORDER BY total DESCENDING
      INTO CORRESPONDING FIELDS OF TABLE @rt_lines.
  ENDMETHOD.

  METHOD display.
    TRY.
        cl_salv_table=>factory( IMPORTING r_salv_table = DATA(lo_alv)
                                CHANGING  t_table      = ct_lines ).
        lo_alv->display( ).
      CATCH cx_salv_msg INTO DATA(lx_error).
        MESSAGE lx_error TYPE 'I' DISPLAY LIKE 'E'.
    ENDTRY.
  ENDMETHOD.
ENDCLASS.

START-OF-SELECTION.
  DATA(go_report) = NEW lcl_report( ).
  DATA(gt_lines) = go_report->select_totals( iv_from = p_from it_region = s_reg[] ).
  go_report->display( CHANGING ct_lines = gt_lines ).

CLASS ltc_report DEFINITION FINAL FOR TESTING DURATION SHORT RISK LEVEL HARMLESS.
  PRIVATE SECTION.
    CLASS-DATA go_env TYPE REF TO if_osql_test_environment.
    CLASS-METHODS class_setup.
    CLASS-METHODS class_teardown.
    METHODS totals_per_region FOR TESTING.
    METHODS region_filter FOR TESTING.
ENDCLASS.

CLASS ltc_report IMPLEMENTATION.
  METHOD class_setup.
    go_env = cl_osql_test_environment=>create( i_dependency_list = VALUE #( ( '{{P}}SALE' ) ) ).
    DATA lt_sale TYPE STANDARD TABLE OF {{p}}sale WITH EMPTY KEY.
    lt_sale = VALUE #( ( sale_id = 1 region = 'A' sale_date = '20260101' amount = 10 )
                       ( sale_id = 2 region = 'A' sale_date = '20260102' amount = 5 )
                       ( sale_id = 3 region = 'B' sale_date = '20260101' amount = 40 ) ).
    go_env->insert_test_data( lt_sale ).
  ENDMETHOD.

  METHOD class_teardown.
    go_env->destroy( ).
  ENDMETHOD.

  METHOD totals_per_region.
    DATA(lt_lines) = NEW lcl_report( )->select_totals( iv_from = '20260101' it_region = VALUE #( ) ).
    cl_abap_unit_assert=>assert_equals( exp = 2 act = lines( lt_lines ) ).
    cl_abap_unit_assert=>assert_equals( exp = 'B' act = lt_lines[ 1 ]-region ).
    cl_abap_unit_assert=>assert_equals( exp = 2 act = lt_lines[ 2 ]-count ).
  ENDMETHOD.

  METHOD region_filter.
    DATA(lt_lines) = NEW lcl_report( )->select_totals(
      iv_from = '20260101' it_region = VALUE #( ( sign = 'I' option = 'EQ' low = 'A' ) ) ).
    cl_abap_unit_assert=>assert_equals( exp = 1 act = lines( lt_lines ) ).
    cl_abap_unit_assert=>assert_equals( exp = CONV {{p}}sale-amount( 15 ) act = lt_lines[ 1 ]-total ).
  ENDMETHOD.
ENDCLASS.