import 'package:flutter_test/flutter_test.dart';
import 'package:pad_scanner/services/code_parser.dart';

void main() {
  group('CodeParser.parse', () {
    test('identifies zongpaiNo type B', () {
      final result = CodeParser.parse('26B1');
      expect(result.type, CodeType.zongpaiNo);
      expect(result.value, '26B1');
    });
    test('identifies zongpaiNo type C', () {
      final result = CodeParser.parse('26C12');
      expect(result.type, CodeType.zongpaiNo);
    });
    test('identifies zongpaiNo type T', () {
      final result = CodeParser.parse('26T3');
      expect(result.type, CodeType.zongpaiNo);
    });
    test('identifies zongpaiNo type BW (4 digits)', () {
      final result = CodeParser.parse('26BW0001');
      expect(result.type, CodeType.zongpaiNo);
    });
    test('identifies zongpaiNo type CW (4 digits)', () {
      final result = CodeParser.parse('26CW0015');
      expect(result.type, CodeType.zongpaiNo);
    });
    test('rejects BW with non-4-digit serial', () {
      expect(CodeParser.parse('26BW01').type, CodeType.invalid);
    });
    test('rejects CW with non-4-digit serial', () {
      expect(CodeParser.parse('26CW15').type, CodeType.invalid);
    });
    test('identifies normal location code', () {
      final result = CodeParser.parse('A01-02-03');
      expect(result.type, CodeType.locationNormal);
      expect(result.value, 'A01-02-03');
    });
    test('identifies transit location code', () {
      final result = CodeParser.parse('TRANS-01');
      expect(result.type, CodeType.locationTransit);
    });
    test('normalizes lowercase zongpaiNo to uppercase', () {
      final result = CodeParser.parse('26b1');
      expect(result.type, CodeType.zongpaiNo);
      expect(result.value, '26B1');
    });
    test('normalizes lowercase location code to uppercase', () {
      final result = CodeParser.parse('a01-02-03');
      expect(result.type, CodeType.locationNormal);
      expect(result.value, 'A01-02-03');
    });
    test('rejects invalid code', () {
      expect(CodeParser.parse('HELLO123').type, CodeType.invalid);
    });
    test('rejects empty string', () {
      expect(CodeParser.parse('').type, CodeType.invalid);
    });
    test('isLocation helper', () {
      expect(CodeParser.isLocation(CodeType.locationNormal), true);
      expect(CodeParser.isLocation(CodeType.locationTransit), true);
      expect(CodeParser.isLocation(CodeType.zongpaiNo), false);
      expect(CodeParser.isLocation(CodeType.invalid), false);
    });
  });

  group('CodeParser.parse attachmentCode (FJ-)', () {
    test('identifies FJ- with zongpai B type', () {
      final result = CodeParser.parse('FJ-26B1');
      expect(result.type, CodeType.attachmentCode);
      expect(result.value, '26B1');
    });
    test('identifies FJ- with zongpai C type', () {
      final result = CodeParser.parse('FJ-26C12');
      expect(result.type, CodeType.attachmentCode);
      expect(result.value, '26C12');
    });
    test('identifies FJ- with zongpai T type', () {
      final result = CodeParser.parse('FJ-26T3');
      expect(result.type, CodeType.attachmentCode);
      expect(result.value, '26T3');
    });
    test('identifies FJ- with zongpai BW 4-digit', () {
      final result = CodeParser.parse('FJ-26BW0001');
      expect(result.type, CodeType.attachmentCode);
      expect(result.value, '26BW0001');
    });
    test('identifies FJ- with zongpai CW 4-digit', () {
      final result = CodeParser.parse('FJ-26CW0015');
      expect(result.type, CodeType.attachmentCode);
      expect(result.value, '26CW0015');
    });
    test('normalizes lowercase fj- to uppercase', () {
      final result = CodeParser.parse('fj-26b1');
      expect(result.type, CodeType.attachmentCode);
      expect(result.value, '26B1');
    });
    test('rejects FJ without hyphen', () {
      expect(CodeParser.parse('FJ26B1').type, CodeType.invalid);
    });
    test('rejects FJ- with invalid zongpai', () {
      expect(CodeParser.parse('FJ-HELLO').type, CodeType.invalid);
    });
    test('rejects FJ- with BW short serial', () {
      expect(CodeParser.parse('FJ-26BW01').type, CodeType.invalid);
    });
    test('attaches original raw code with FJ- prefix for display', () {
      final result = CodeParser.parse('FJ-26B42360');
      expect(result.value, '26B42360');
    });
  });
}