import 'dart:ffi';

import 'package:ffi/ffi.dart';
import 'package:segmentation_douglas_peucker_flutter/dali_point.dart';
import 'package:segmentation_douglas_peucker_flutter/dotnet_exception.dart';
import 'package:segmentation_douglas_peucker_flutter/gen/generated_bindings.dart';
import 'package:segmentation_douglas_peucker_flutter/lib.dart';

abstract class Douglas {
  static void runExample() {
    final NativeLibrary nativeLibrary = NativeLibrary(Lib.init('Dali.Segmentation.DouglasPeucker'));

    final Pointer<System_Exception_t> exception = calloc();
    print('Exception allocated ! ($exception)');

    final System_Type_t type = nativeLibrary.System_Drawing_Point_TypeOf();

    final System_Drawing_Point_t point1 =
        nativeLibrary.System_Drawing_Point_Create(200, 400, exception);
    exception.handle();
    final DaliPoint daliPoint1 = DaliPoint.fromPointer(point1);

    print('Point1: $daliPoint1');

    final System_Drawing_Point_t point2 =
        nativeLibrary.System_Drawing_Point_Create(200, 500, exception);
    exception.handle();
    final DaliPoint daliPoint2 = DaliPoint.fromPointer(point2);

    print('Point2: $daliPoint2');

    final System_Drawing_Point_t point3 =
        nativeLibrary.System_Drawing_Point_Create(200, 600, exception);
    exception.handle();
    final DaliPoint daliPoint3 = DaliPoint.fromPointer(point3);

    print('Point3: $daliPoint3');

    final System_Collections_Generic_List_A1_t points =
        nativeLibrary.System_Collections_Generic_List_A1_Create_1(
      type,
      3,
      exception,
    );

    exception.handle(onException: print);

    print('Points list created ! ($points)');

    nativeLibrary.System_Collections_Generic_List_A1_Add(
        points, type, point1, exception);
    exception.handle();

    print('Point1 added !');

    nativeLibrary.System_Collections_Generic_List_A1_Add(
        points, type, point2, exception);
    exception.handle();

    print('Point2 added !');

    nativeLibrary.System_Collections_Generic_List_A1_Add(
        points, type, point3, exception);
    exception.handle();

    print('Point3 added !');
  }
}