import 'dart:convert';

import 'package:flutter_test/flutter_test.dart';
import 'package:hepan_everyday/data/json_schedule_import.dart';
import 'package:hepan_everyday/domain/course.dart';

Map<String, dynamic> row({String id = 'a', int day = 1}) => {
  'id': id,
  'name': '矩阵论',
  'teacher': '老师',
  'room': '教室',
  'weekday': day,
  'startPeriod': 1,
  'endPeriod': 2,
  'weeks': [1, 3, 5],
};
String input(List<dynamic> courses, {int version = 1, bool demo = false}) =>
    jsonEncode({'schemaVersion': version, 'isDemo': demo, 'courses': courses});
void main() {
  test('file import normalizes weeks and cannot claim school provenance', () {
    final parsed = JsonScheduleImport.parse(input([row()]));
    expect(parsed.courses, hasLength(1));
    expect(parsed.courses.single.weeks, {1, 3, 5});
    expect(parsed.source, CourseSource.file);
  });
  test('one invalid course rejects the whole draft', () {
    expect(
      () => JsonScheduleImport.parse(input([row(), row(id: 'b', day: 8)])),
      throwsFormatException,
    );
  });
  test('duplicate identifiers and unsupported schema are rejected', () {
    expect(
      () => JsonScheduleImport.parse(input([row(), row()])),
      throwsFormatException,
    );
    expect(
      () => JsonScheduleImport.parse(input([], version: 2)),
      throwsFormatException,
    );
  });
  test('demo import is explicitly separated from real records', () {
    expect(
      JsonScheduleImport.parse(input([row()], demo: true)).source,
      CourseSource.demo,
    );
  });
  test('valid but oversized JSON is rejected before accepting a course', () {
    final large = row()..['name'] = List.filled(2100000, 'x').join();
    expect(
      () => JsonScheduleImport.parse(input([large])),
      throwsFormatException,
    );
  });
}