// Unit tests for PenSlot / PenSlotsController persistence and independence.

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:badnote/editor/engine/brush.dart';
import 'package:badnote/editor/input/pen_slots.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  setUp(() {
    SharedPreferences.setMockInitialValues({});
  });

  group('PenSlot toJson / fromJson', () {
    test('round-trips defaults', () {
      for (final slot in kDefaultPenSlots()) {
        final restored = PenSlot.fromJson(slot.toJson());
        expect(restored, slot);
      }
    });
  });

  group('PenSlotsController', () {
    test('seeds three default pens on first load', () async {
      final c = await PenSlotsController.load();
      expect(c.slots.length, 3);
      expect(c.active.brush, BrushKind.fountainPen);
      expect(c.active.color, Colors.black);
      expect(c.active.width, 0.006);
      expect(c.slots[1].brush, BrushKind.ballpoint);
      expect(c.slots[1].width, 0.0022);
      expect(c.slots[2].brush, BrushKind.pencil);
      expect(c.slots[2].width, 0.003);
      c.dispose();
    });

    test('select restores brush + color + width as a unit', () async {
      final c = await PenSlotsController.load();
      await c.select('slot_1');
      expect(c.active.brush, BrushKind.ballpoint);
      expect(c.active.color, Colors.blue);
      expect(c.active.width, 0.0022);

      await c.setActiveColor(Colors.red);
      await c.setActiveWidth(0.01);

      await c.select('slot_0');
      expect(c.active.color, Colors.black);
      expect(c.active.width, 0.006);

      await c.select('slot_1');
      expect(c.active.color, Colors.red);
      expect(c.active.width, 0.01);
      c.dispose();
    });

    test('persists across load()', () async {
      final first = await PenSlotsController.load();
      await first.select('slot_2');
      await first.setActiveColor(Colors.purple);
      await first.setActiveWidth(0.008);
      first.dispose();

      final second = await PenSlotsController.load();
      expect(second.activeId, 'slot_2');
      expect(second.active.brush, BrushKind.pencil);
      expect(second.active.color.toARGB32(), Colors.purple.toARGB32());
      expect(second.active.width, 0.008);
      second.dispose();
    });
  });
}