import 'package:meta/meta.dart';
import 'package:json_annotation/json_annotation.dart';
import 'package:vikunja_app/components/date_extension.dart';

import 'package:vikunja_app/models/label.dart';
import 'package:vikunja_app/models/user.dart';

@JsonSerializable()
class Task {
  int id, parentTaskId, priority, listId;
  DateTime created, updated, dueDate, startDate, endDate;
  List<DateTime> reminderDates;
  String title, description;
  bool done;
  User createdBy;
  Duration repeatAfter;
  List<Task> subtasks;
  List<Label> labels;
  bool loading = false;

  Task(
      {@required this.id,
      this.title,
      this.description,
      this.done = false,
      this.reminderDates,
      this.dueDate,
      this.startDate,
      this.endDate,
      this.parentTaskId,
      this.priority,
      this.repeatAfter,
      this.subtasks,
      this.labels,
      this.created,
      this.updated,
      this.createdBy,
      this.listId});

  Task.fromJson(Map<String, dynamic> json)
      : id = json['id'],
        title = json['title'],
        description = json['description'],
        done = json['done'],
        reminderDates = (json['reminder_dates'] as List<dynamic>)
            ?.map((ts) => DateTime.parse(ts))
            ?.cast<DateTime>()
            ?.toList(),
        dueDate = DateTime.parse(json['due_date']),
        startDate = DateTime.parse(json['start_date']),
        endDate = DateTime.parse(json['end_date']),
        parentTaskId = json['parent_task_id'],
        priority = json['priority'],
        repeatAfter = Duration(seconds: json['repeat_after']),
        labels = (json['labels'] as List<dynamic>)
            ?.map((label) => Label.fromJson(label))
            ?.cast<Label>()
            ?.toList(),
        subtasks = (json['subtasks'] as List<dynamic>)
            ?.map((subtask) => Task.fromJson(subtask))
            ?.cast<Task>()
            ?.toList(),
        updated = DateTime.parse(json['updated']),
        created = DateTime.parse(json['created']),
        listId = json['list_id'],
        createdBy = json['created_by'] == null
            ? null
            : User.fromJson(json['created_by']);

  toJSON() => {
        'id': id,
        'title': title,
        'description': description,
        'done': done ?? false,
        'reminder_dates':
            reminderDates?.map((date) => date?.toIso8601String())?.toList(),
        'due_date': dueDate?.toUtc()?.toIso8601String(),
        'start_date': startDate?.toUtc()?.toIso8601String(),
        'end_date': endDate?.toUtc()?.toIso8601String(),
        'priority': priority,
        'repeat_after': repeatAfter?.inSeconds,
        'labels': labels?.map((label) => label.toJSON())?.toList(),
        'subtasks': subtasks?.map((subtask) => subtask.toJSON())?.toList(),
        'created_by': createdBy?.toJSON(),
        'updated': updated?.toIso8601String(),
        'created': created?.toIso8601String(),
      };
}