INTERFACE {{p}}if_solar_check PUBLIC.
  TYPES:
    ty_reason TYPE c LENGTH 10,
    ty_roof   TYPE c LENGTH 4,
    BEGIN OF ty_request,
      roof_type   TYPE ty_roof,
      roof_size   TYPE i,
      panel_count TYPE i,
      tilt_angle  TYPE i,
      battery_kwh TYPE i,
    END OF ty_request,
    tt_request TYPE STANDARD TABLE OF ty_request WITH EMPTY KEY,
    tt_reason  TYPE STANDARD TABLE OF ty_reason WITH EMPTY KEY.

  CONSTANTS:
    BEGIN OF c_reason,
      ok          TYPE ty_reason VALUE 'OK',
      empty_input TYPE ty_reason VALUE 'EMPTY',
      roof_type   TYPE ty_reason VALUE 'ROOF',
      roof_size   TYPE ty_reason VALUE 'SIZE',
      panels      TYPE ty_reason VALUE 'PANELS',
      tilt        TYPE ty_reason VALUE 'TILT',
      battery     TYPE ty_reason VALUE 'BATTERY',
    END OF c_reason,
    c_roof_tile   TYPE ty_roof VALUE 'TILE',
    c_roof_slate  TYPE ty_roof VALUE 'SLAT',
    c_roof_flat   TYPE ty_roof VALUE 'FLAT',
    c_min_panels  TYPE i VALUE 4,
    c_max_panels  TYPE i VALUE 60,
    c_min_tilt    TYPE i VALUE 5,
    c_max_tilt    TYPE i VALUE 60,
    c_max_battery TYPE i VALUE 20.

  METHODS check
    IMPORTING is_request       TYPE ty_request
    RETURNING VALUE(rv_reason) TYPE ty_reason.

  METHODS check_many
    IMPORTING it_request       TYPE tt_request
    RETURNING VALUE(rt_reason) TYPE tt_reason.
ENDINTERFACE.