import '../../internal/application/CommitmentClass.dart';
import '../../internal/application/RoutineKind.dart';
import '../../internal/application/StepMode.dart';
import '../../../utils/ObjectConvertors.dart';
import 'RoutineStep.dart';

/// An ordered sequence where the chain, not the step, is the unit of
/// completion. Breaking mid-way logs partial.
class RoutineChain {
  String? id;

  String title;

  /// The goal this routine serves — "Workout" holds "Full body strength".
  /// Null for a routine that stands on its own.
  String? goalId;

  RoutineKind kind;

  /// Weight class, exactly as for a commitment — a non-negotiable morning
  /// routine carries non-negotiable debt when it breaks.
  CommitmentClass commitmentClass;

  /// 1..7, Monday first. Empty means unscheduled — run on demand only.
  List<int> days;

  /// Minutes after midnight the routine is due to start; -1 when unset.
  int startMinute;

  String note;

  List<RoutineStep> steps;

  /// Index of the step reached when the chain last broke; -1 when clean.
  int lastBreakIndex;

  RoutineChain({
    this.id,
    this.title = "",
    this.goalId,
    this.kind = RoutineKind.Workout,
    this.commitmentClass = CommitmentClass.Standard,
    List<int>? days,
    this.startMinute = -1,
    this.note = "",
    List<RoutineStep>? steps,
    this.lastBreakIndex = -1,
  })  : days = days ?? <int>[],
        steps = steps ?? <RoutineStep>[];

  factory RoutineChain.fromJson(Map<String, dynamic> json) {
    return RoutineChain(
      id: json['id'],
      title: json['title'] ?? "",
      goalId: json['goalId'],
      kind: getRoutineKind(json['kind']),
      commitmentClass: getCommitmentClass(json['commitmentClass']),
      days: json['days'] == null
          ? <int>[]
          : (json['days'] as List).map((item) => item as int).toList(),
      startMinute: json['startMinute'] ?? -1,
      note: json['note'] ?? "",
      steps: getRoutineStepList(json['steps']),
      lastBreakIndex: json['lastBreakIndex'] ?? -1,
    );
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = <String, dynamic>{};
    data['id'] = id;
    data['title'] = title;
    data['goalId'] = goalId;
    data['kind'] = kind.name;
    data['commitmentClass'] = commitmentClass.name;
    data['days'] = days;
    data['startMinute'] = startMinute;
    data['note'] = note;
    data['steps'] = steps.map((item) => item.toJson()).toList();
    data['lastBreakIndex'] = lastBreakIndex;
    return data;
  }

  int get completedSteps {
    return steps.where((step) => step.completed).length;
  }

  /// 0..1 — a partially run chain is recorded as partial, not as done.
  double get partialCompletion {
    if (steps.isEmpty) {
      return 0;
    }
    return completedSteps / steps.length;
  }

  bool get complete {
    return steps.isNotEmpty && completedSteps == steps.length;
  }

  bool get scheduled {
    return days.isNotEmpty;
  }

  bool scheduledOn(DateTime day) {
    return days.contains(day.weekday);
  }

  /// Every set of every step, for the "12 sets" figure.
  int get totalSets {
    int total = 0;
    for (RoutineStep step in steps) {
      total = total + step.sets;
    }
    return total;
  }

  /// Planned seconds, rest included. Rep and tick steps count their estimate.
  int get totalSeconds {
    int total = 0;
    for (RoutineStep step in steps) {
      total = total + step.plannedSeconds;
    }
    return total;
  }

  int get timedSteps {
    return steps.where((step) => step.mode == StepMode.Timed).length;
  }

  /// A deep copy for the builder, so cancelling an edit leaves the library
  /// untouched.
  RoutineChain copy() {
    return RoutineChain.fromJson(toJson());
  }
}