REPORT {{p}}fleet_dist.

TYPES:
  BEGIN OF ty_line,
    veh_id   TYPE {{p}}veh-veh_id,
    depot    TYPE {{p}}veh-depot,
    distance TYPE i,
    readings TYPE i,
  END OF ty_line,
  tt_line  TYPE STANDARD TABLE OF ty_line WITH EMPTY KEY,
  tt_depot TYPE RANGE OF {{p}}veh-depot.

DATA gv_depot TYPE {{p}}veh-depot.

PARAMETERS p_from TYPE d OBLIGATORY.
PARAMETERS p_to   TYPE d OBLIGATORY.
SELECT-OPTIONS s_depot FOR gv_depot.

CLASS lcl_report DEFINITION FINAL.
  PUBLIC SECTION.
    METHODS select_distances
      IMPORTING iv_from        TYPE d
                iv_to          TYPE d
                it_depot       TYPE tt_depot
      RETURNING VALUE(rt_lines) TYPE tt_line.
    METHODS display
      CHANGING ct_lines TYPE tt_line.
  PRIVATE SECTION.
    TYPES:
      BEGIN OF ty_raw,
        veh_id   TYPE {{p}}veh-veh_id,
        depot    TYPE {{p}}veh-depot,
        max_odo  TYPE {{p}}odom-odometer,
        min_odo  TYPE {{p}}odom-odometer,
        readings TYPE i,
      END OF ty_raw,
      tt_raw TYPE STANDARD TABLE OF ty_raw WITH EMPTY KEY.
ENDCLASS.

CLASS lcl_report IMPLEMENTATION.
  METHOD select_distances.
    DATA lt_raw TYPE tt_raw.
    SELECT v~veh_id, v~depot, MAX( o~odometer ) AS max_odo, MIN( o~odometer ) AS min_odo,
           COUNT( * ) AS readings
      FROM {{p}}veh AS v
      INNER JOIN {{p}}odom AS o ON o~veh_id = v~veh_id
      WHERE o~read_date >= @iv_from
        AND o~read_date <= @iv_to
        AND v~depot IN @it_depot
      GROUP BY v~veh_id, v~depot
      HAVING COUNT( * ) >= 2
      INTO CORRESPONDING FIELDS OF TABLE @lt_raw.
    LOOP AT lt_raw ASSIGNING FIELD-SYMBOL(<ls_raw>).
      APPEND VALUE #( veh_id   = <ls_raw>-veh_id
                      depot    = <ls_raw>-depot
                      distance = <ls_raw>-max_odo - <ls_raw>-min_odo
                      readings = <ls_raw>-readings ) TO rt_lines.
    ENDLOOP.
    SORT rt_lines BY distance DESCENDING veh_id ASCENDING.
  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_distances( iv_from = p_from iv_to = p_to it_depot = s_depot[] ).
  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 distances_per_vehicle FOR TESTING.
    METHODS depot_filter FOR TESTING.
ENDCLASS.

CLASS ltc_report IMPLEMENTATION.
  METHOD class_setup.
    go_env = cl_osql_test_environment=>create(
      i_dependency_list = VALUE #( ( '{{P}}VEH' ) ( '{{P}}ODOM' ) ) ).
    DATA lt_veh TYPE STANDARD TABLE OF {{p}}veh WITH EMPTY KEY.
    lt_veh = VALUE #( ( veh_id = 'V1' depot = 'D1' )
                      ( veh_id = 'V2' depot = 'D2' )
                      ( veh_id = 'V3' depot = 'D2' ) ).
    go_env->insert_test_data( lt_veh ).
    DATA lt_odom TYPE STANDARD TABLE OF {{p}}odom WITH EMPTY KEY.
    lt_odom = VALUE #( ( read_id = 1 veh_id = 'V1' read_date = '20260101' odometer = 100 )
                       ( read_id = 2 veh_id = 'V1' read_date = '20260110' odometer = 400 )
                       ( read_id = 3 veh_id = 'V2' read_date = '20260105' odometer = 50 )
                       ( read_id = 4 veh_id = 'V3' read_date = '20260102' odometer = 200 )
                       ( read_id = 5 veh_id = 'V3' read_date = '20260112' odometer = 500 )
                       ( read_id = 6 veh_id = 'V3' read_date = '20260122' odometer = 900 ) ).
    go_env->insert_test_data( lt_odom ).
  ENDMETHOD.

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

  METHOD distances_per_vehicle.
    DATA(lt_lines) = NEW lcl_report( )->select_distances(
      iv_from = '20260101' iv_to = '20260131' it_depot = VALUE #( ) ).
    cl_abap_unit_assert=>assert_equals( exp = 2 act = lines( lt_lines ) ).
    cl_abap_unit_assert=>assert_equals( exp = 'V3' act = lt_lines[ 1 ]-veh_id ).
    cl_abap_unit_assert=>assert_equals( exp = 700 act = lt_lines[ 1 ]-distance ).
    cl_abap_unit_assert=>assert_equals( exp = 3 act = lt_lines[ 1 ]-readings ).
    cl_abap_unit_assert=>assert_equals( exp = 300 act = lt_lines[ 2 ]-distance ).
  ENDMETHOD.

  METHOD depot_filter.
    DATA(lt_lines) = NEW lcl_report( )->select_distances(
      iv_from = '20260101' iv_to = '20260131'
      it_depot = VALUE #( ( sign = 'I' option = 'EQ' low = 'D2' ) ) ).
    cl_abap_unit_assert=>assert_equals( exp = 1 act = lines( lt_lines ) ).
    cl_abap_unit_assert=>assert_equals( exp = 'V3' act = lt_lines[ 1 ]-veh_id ).
  ENDMETHOD.
ENDCLASS.