import 'package:flutter_test/flutter_test.dart';
import 'package:jiu_client/core/utils/label_template.dart';

/// 锁死模板存储读写（走 shop.custom_fields，零后端改动）与 JSON 往返，
/// 不触真实库——纯内存对象校验。
void main() {
  group('LabelTemplate 存储 helpers', () {
    test('custom_fields 无模板时回退内置默认', () {
      final list = readLabelTemplates(<String, dynamic>{});
      expect(list, hasLength(1));
      expect(list.first.id, 'builtin-default');
    });

    test('activeLabelTemplate 按 id 命中，缺失回退第一项', () {
      final a = LabelTemplate.builtinDefault();
      final b = a.copyWith(id: 'tpl-2', name: '大字号');
      final cf = <String, dynamic>{
        'label_templates': [a.toJson(), b.toJson()],
        'label_template_active': 'tpl-2',
      };
      expect(activeLabelTemplate(cf).id, 'tpl-2');

      cf['label_template_active'] = 'nope';
      expect(activeLabelTemplate(cf).id, 'builtin-default');
    });

    test('toJson → fromJson 往返保真（几何/开关/样式）', () {
      final src = LabelTemplate.builtinDefault();
      src.textStack.subLines[0].fontSize = 16;
      src.textStack.subLines[0].bold = true;
      src.qr.size = 120;
      src.print.direction = 0;
      final back = LabelTemplate.fromJson(src.toJson());
      expect(back.textStack.subLines[0].fontSize, 16);
      expect(back.textStack.subLines[0].bold, true);
      expect(back.qr.size, 120);
      expect(back.print.direction, 0);
    });

    test('存 → 读回列表保持顺序与命名', () {
      final a = LabelTemplate.builtinDefault();
      final b = a.copyWith(id: 'tpl-2', name: '双语抬头');
      final cf = <String, dynamic>{
        'label_templates': [a.toJson(), b.toJson()],
      };
      final list = readLabelTemplates(cf);
      expect(list.map((t) => t.id), ['builtin-default', 'tpl-2']);
      expect(list[1].name, '双语抬头');
    });

    test('老店铺旧默认 QR 加载时自动升级为居中坐标', () {
      final def = LabelTemplate.builtinDefault();
      // 构造两个历史默认签名的模板（贴头顶版 + 中间偏上版）
      final legacyA = def.copyWith(id: 'tpl-legacy-a', name: '旧模板A');
      legacyA.qr
        ..x = 178
        ..y = 25
        ..size = 134;
      final legacyB = def.copyWith(id: 'tpl-legacy-b', name: '旧模板B');
      legacyB.qr
        ..x = 190
        ..y = 34
        ..size = 116;
      final cf = <String, dynamic>{
        'label_templates': [legacyA.toJson(), legacyB.toJson()],
      };
      final list = readLabelTemplates(cf);
      for (final t in list) {
        expect(t.qr.x, def.qr.x, reason: '${t.name} QR.x 应升级到新默认');
        expect(t.qr.y, def.qr.y, reason: '${t.name} QR.y 应升级到新默认');
        expect(t.qr.size, def.qr.size, reason: '${t.name} QR.size 应升级到新默认');
      }
    });

    test('内置默认模板永远回代码基准：存储里被改脏也覆盖回 builtinDefault', () {
      final def = LabelTemplate.builtinDefault();
      // 模拟老库存的 builtin-default：品名被关、QR 乱改、字号乱改
      final stale = def.copyWith();
      stale.textStack.name.show = false;
      stale.qr
        ..x = 10
        ..y = 10
        ..size = 200;
      stale.textStack.subLines[0].fontSize = 99;
      final cf = <String, dynamic>{
        'label_templates': [stale.toJson()],
      };
      final t =
          readLabelTemplates(cf).firstWhere((x) => x.id == 'builtin-default');
      expect(t.textStack.name.show, isTrue, reason: '品名默认必须展示');
      expect(t.qr.x, def.qr.x);
      expect(t.qr.y, def.qr.y);
      expect(t.qr.size, def.qr.size);
      expect(t.textStack.subLines[0].fontSize, def.textStack.subLines[0].fontSize);
    });

    test('用户自定义过的 QR 不匹配旧签名，加载时保持不动', () {
      final custom = LabelTemplate.builtinDefault().copyWith(
        id: 'tpl-custom',
        name: '自定义位置',
      );
      custom.qr
        ..x = 210
        ..y = 60
        ..size = 80; // 与任一历史默认都不同
      final cf = <String, dynamic>{
        'label_templates': [custom.toJson()],
      };
      final t = readLabelTemplates(cf).first;
      expect(t.qr.x, 210);
      expect(t.qr.y, 60);
      expect(t.qr.size, 80);
    });
  });
}