import 'dart:convert';

import 'package:aitrainer_app/model/cache.dart';
import 'package:aitrainer_app/model/exercise_tree.dart';
import 'package:aitrainer_app/model/exercise_tree_parents.dart';
import 'api.dart';

class ExerciseTreeApi {
  final APIClient _client = new APIClient();

  Future<List<ExerciseTree>> getExerciseTree() async {
    final String body = await _client.get("exercise_tree", "");
    Iterable json = jsonDecode(body);
    List<ExerciseTree> exerciseTree = json.map((exerciseTree) => ExerciseTree.fromJson(exerciseTree)).toList();

    exerciseTree = await getExerciseTreeParents(exerciseTree);

    Cache().setExerciseTree(exerciseTree);
    return exerciseTree;
  }

  Future<List<ExerciseTree>> getExerciseTreeParents(List<ExerciseTree> exerciseTree) async {
    List<ExerciseTree> copyList = this._copyList(exerciseTree);

    final String body = await _client.get("exercise_tree_parents", "");
    Iterable json = jsonDecode(body);
    final List<ExerciseTreeParents> exerciseTreeParents =
        json.map((exerciseTreeParent) => ExerciseTreeParents.fromJson(exerciseTreeParent)).toList();

    int treeIndex = 0;
    copyList.forEach((element) async {
      int index = 0;
      exerciseTreeParents.forEach((parent) {
        if (parent.exerciseTreeChildId == element.treeId) {
          if (index > 0) {
            ExerciseTree newElement = element.copy(parent.exerciseTreeParentId);
            exerciseTree.add(newElement);
            //print("ExerciseTree " + newElement.toJson().toString());
          } else {
            element.parentId = parent.exerciseTreeParentId;
            exerciseTree[treeIndex].parentId = parent.exerciseTreeParentId;
          }
          index++;
        }
      });
      print("ExerciseTree " + element.toJson().toString());
      treeIndex++;
    });

    return exerciseTree;
  }

  List<ExerciseTree> _copyList(List<ExerciseTree> tree) {
    final List<ExerciseTree> copyList = List();
    tree.forEach((element) {
      final ExerciseTree copy = element.copy(-1);
      copyList.add(copy);
    });

    return copyList;
  }
}