REPORT {{p}}oil_report.

DATA gv_region TYPE {{p}}grove-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}}grove-region,
        litres TYPE {{p}}press-litres,
        kilos  TYPE {{p}}press-kilos,
      END OF ty_line,
      tt_line TYPE STANDARD TABLE OF ty_line WITH EMPTY KEY.
    TYPES tt_region TYPE RANGE OF {{p}}grove-region.
    METHODS collect
      IMPORTING iv_from         TYPE d
                it_region       TYPE tt_region
      RETURNING VALUE(rt_lines) TYPE tt_line.
    METHODS show
      CHANGING ct_lines TYPE tt_line.
ENDCLASS.

CLASS lcl_report IMPLEMENTATION.
  METHOD collect.
    SELECT gr~region,
           SUM( pr~litres ) AS litres,
           SUM( pr~kilos ) AS kilos
      FROM {{p}}press AS pr
      INNER JOIN {{p}}grove AS gr ON gr~grove_id = pr~grove_id
      WHERE pr~press_date < @iv_from
        AND gr~region IN @it_region
      GROUP BY gr~region
      ORDER BY litres DESCENDING
      INTO CORRESPONDING FIELDS OF TABLE @rt_lines.
  ENDMETHOD.

  METHOD show.
    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->collect( iv_from = p_from it_region = s_reg[] ).
  go_report->show( 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 litres_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}}GROVE' ) ( '{{P}}PRESS' ) ) ).
    DATA lt_grove TYPE STANDARD TABLE OF {{p}}grove WITH EMPTY KEY.
    lt_grove = VALUE #( ( grove_id = 1 grove_name = 'A' region = 'NORTH' variety = 'ARBEQ' )
                        ( grove_id = 2 grove_name = 'B' region = 'NORTH' variety = 'ARBEQ' )
                        ( grove_id = 3 grove_name = 'C' region = 'SOUTH' variety = 'PICUA' ) ).
    go_env->insert_test_data( lt_grove ).
    DATA lt_press TYPE STANDARD TABLE OF {{p}}press WITH EMPTY KEY.
    lt_press = VALUE #( ( press_id = 1 grove_id = 1 press_date = '20260110' kilos = 1000 litres = '200.00' )
                        ( press_id = 2 grove_id = 2 press_date = '20260111' kilos = 500  litres = '90.00' )
                        ( press_id = 3 grove_id = 3 press_date = '20260112' kilos = 800  litres = '150.00' ) ).
    go_env->insert_test_data( lt_press ).
  ENDMETHOD.

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

  METHOD litres_per_region.
    DATA lv_expected TYPE {{p}}press-litres.
    lv_expected = '290.00'.
    DATA(lt_lines) = NEW lcl_report( )->collect(
      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 = 'NORTH' act = lt_lines[ 1 ]-region ).
    cl_abap_unit_assert=>assert_equals( exp = lv_expected act = lt_lines[ 1 ]-litres ).
    cl_abap_unit_assert=>assert_equals( exp = 1500 act = lt_lines[ 1 ]-kilos ).
  ENDMETHOD.

  METHOD region_filter.
    DATA lv_expected TYPE {{p}}press-litres.
    lv_expected = '150.00'.
    DATA(lt_lines) = NEW lcl_report( )->collect(
      iv_from = '20260101'
      it_region = VALUE #( ( sign = 'I' option = 'EQ' low = 'SOUTH' ) ) ).
    cl_abap_unit_assert=>assert_equals( exp = 1 act = lines( lt_lines ) ).
    cl_abap_unit_assert=>assert_equals( exp = lv_expected act = lt_lines[ 1 ]-litres ).
  ENDMETHOD.
ENDCLASS.