// MOCK DATA — TEMPORARY. See MockSwitch.dart.

import 'dart:math';

import 'package:flutter_secure_storage/flutter_secure_storage.dart';

import '../about/internal/application/MeDescription.dart';
import '../about/internal/application/RoutineRunRecord.dart';
import '../about/internal/application/TodoItem.dart';
import '../about/internal/application/UserDetails.dart';
import '../memory/InternalMemory.dart';
import 'MockStorage.dart';

/// The real [InternalMemory], pointed at in-memory storage and pre-seeded
/// with a signed-in user so the app opens straight onto Home.
class MockMemory extends InternalMemory {
  static bool _seeded = false;

  MockMemory() {
    if (!_seeded) {
      _seeded = true;
      setMyDescription(
          MeDescription(id: "mock-user", name: "Alex", token: "mock-token"));
      setUserDetails(UserDetails(pic: "", name: "Alex"));
      setTodos(<TodoItem>[
        TodoItem(id: "t1", title: "Pick up gym kit"),
        TodoItem(id: "t2", title: "Book physio for Thursday"),
        TodoItem(id: "t3", title: "Reply to Sam about Saturday", done: true),
      ]);
      setRunLog(_history());
    }
  }

  /// Six weeks of runs against the seeded routines, mostly held, with the
  /// odd broken chain and skipped day, so Progress has a shape to draw.
  static List<RoutineRunRecord> _history() {
    final Random random = Random(11);
    final DateTime now = DateTime.now();
    final DateTime today = DateTime(now.year, now.month, now.day);
    final List<RoutineRunRecord> records = <RoutineRunRecord>[];

    void add(DateTime day, String id, String title, String kind, int minute,
        int seconds, int steps, double holdRate) {
      final DateTime at = day.add(Duration(minutes: minute));
      if (at.isAfter(now)) {
        return;
      }
      final bool held = random.nextDouble() < holdRate;
      records.add(RoutineRunRecord(
        routineId: id,
        title: title,
        kind: kind,
        startedAt: at,
        seconds: (seconds * (held ? 1 : 0.5) * (0.85 + random.nextDouble() * 0.3))
            .round(),
        completedSteps: held ? steps : 1 + random.nextInt(steps - 1),
        totalSteps: steps,
      ));
    }

    for (int ago = 42; ago >= 1; ago--) {
      final DateTime day = today.subtract(Duration(days: ago));
      final int weekday = day.weekday;

      // A quiet day now and then: nothing run at all.
      if (random.nextDouble() < 0.12) {
        continue;
      }
      if (weekday <= 5) {
        add(day, "routine-morning", "Morning non-negotiables", "MustDo",
            7 * 60 + 15, 14 * 60, 4, 0.85);
        add(day, "routine-shutdown", "Evening shutdown", "MustDo", 18 * 60,
            9 * 60, 4, 0.6);
      }
      if (weekday == 1 || weekday == 3 || weekday == 5) {
        add(day, "routine-strength", "Full body strength", "Workout",
            17 * 60 + 30, 44 * 60, 6, 0.75);
      }
      if (weekday >= 6) {
        add(day, "routine-mobility", "Mobility flow", "Workout", 10 * 60,
            22 * 60, 5, 0.8);
      }
      if (random.nextDouble() < 0.35) {
        add(day, "routine-breathing", "Box breathing", "Meditation", 21 * 60,
            8 * 60, 3, 0.95);
      }
    }

    // Today: the morning chain is already held in the seeded routines.
    records.add(RoutineRunRecord(
      routineId: "routine-morning",
      title: "Morning non-negotiables",
      kind: "MustDo",
      startedAt: today.add(const Duration(minutes: 7 * 60 + 10)),
      seconds: 13 * 60 + 40,
      completedSteps: 4,
      totalSteps: 4,
    ));

    return records;
  }

  @override
  FlutterSecureStorage get groundedStorage => const MockStorage();
}