import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:patbond_flutter/core/network/api_exception.dart';
import 'package:patbond_flutter/core/theme/app_theme.dart';
import 'package:patbond_flutter/features/pets/health_record_analytics.dart';
import 'package:patbond_flutter/features/pets/pet_exceptions.dart';
import 'package:patbond_flutter/features/pets/pet_models.dart';
import 'package:patbond_flutter/features/pets/vaccination_form_page.dart';

import '../../helpers/pet_test_helpers.dart';

void main() {
  late FakePetsRepository repository;
  late List<(String, Map<String, dynamic>?)> events;
  late HealthRecordAnalytics analytics;

  setUp(() {
    repository = FakePetsRepository();
    events = [];
    analytics = HealthRecordAnalytics(
      (name, [props]) async => events.add((name, props)),
    );
  });

  List<Map<String, dynamic>?> eventsOf(String name) => [
    for (final e in events)
      if (e.$1 == name) e.$2,
  ];

  Future<void> pumpForm(WidgetTester tester) async {
    tester.view.physicalSize = const Size(700, 2000);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.reset);
    await tester.pumpWidget(
      MaterialApp(
        theme: buildAppTheme(),
        home: const Scaffold(body: Text('列表基底')),
      ),
    );
    final navigator = tester.state<NavigatorState>(find.byType(Navigator));
    unawaited(
      navigator.push(
        MaterialPageRoute<void>(
          builder: (_) => VaccinationFormPage(
            repository: repository,
            petId: 'p-1',
            petSpecies: PetSpecies.dog,
            analytics: analytics,
          ),
        ),
      ),
    );
    await tester.pumpAndSettle();
  }

  Future<void> selectVaccine(WidgetTester tester, String name) async {
    await tester.tap(find.byType(DropdownButtonFormField<String>));
    await tester.pumpAndSettle();
    await tester.tap(find.text(name).last);
    await tester.pumpAndSettle();
  }

  Future<void> pickDate(WidgetTester tester, String tileLabel) async {
    await tester.tap(find.text(tileLabel));
    await tester.pumpAndSettle();
    await tester.tap(find.text('OK'));
    await tester.pumpAndSettle();
  }

  testWidgets('目录按宠物物种过滤；加载失败可重试恢复', (tester) async {
    var calls = 0;
    PetSpecies? capturedSpecies;
    repository.listVaccineCatalogHandler = (species) async {
      calls++;
      capturedSpecies = species;
      if (calls == 1) throw const ApiNetworkException('断网');
      return [VaccineCatalogItem.fromJson(sampleVaccineCatalogJson())];
    };

    await pumpForm(tester);

    expect(find.text('疫苗目录加载失败，请重试后选择'), findsOneWidget);

    await tester.tap(find.text('重试'));
    await tester.pumpAndSettle();

    expect(find.byType(DropdownButtonFormField<String>), findsOneWidget);
    expect(capturedSpecies, PetSpecies.dog);
  });

  testWidgets('空表单提交：疫苗与计划日期双拦截 + failed(validation_error)', (tester) async {
    await pumpForm(tester);

    await tester.tap(find.text('保存登记'));
    await tester.pumpAndSettle();

    expect(find.text('请选择疫苗'), findsOneWidget);
    expect(find.text('请选择计划接种日期'), findsOneWidget);

    final failed = eventsOf('health_record_create_failed');
    expect(failed.single!['recordType'], 'vaccine');
    expect(failed.single!['failureReason'], 'validation_error');
  });

  testWidgets('选疫苗自动预填系列（目录 code），首次输入触发 started 一次', (tester) async {
    await pumpForm(tester);

    expect(eventsOf('health_record_create_started'), isEmpty);

    await selectVaccine(tester, '狂犬疫苗');

    expect(
      tester
          .widget<TextFormField>(find.widgetWithText(TextFormField, '系列名称'))
          .controller!
          .text,
      'rabies',
    );

    // 再动一个字段：started 不重复。
    await tester.enterText(find.widgetWithText(TextFormField, '剂次'), '2');
    await tester.pumpAndSettle();

    final started = eventsOf('health_record_create_started');
    expect(started, hasLength(1));
    expect(started.single, {
      'recordType': 'vaccine',
      'entryPoint': 'record_list',
    });
  });

  testWidgets('状态机拦截 · 未填接种日期就标完成：前端拦截不发请求', (tester) async {
    var createCalls = 0;
    repository.createVaccinationHandler = (petId, request) async {
      createCalls++;
      return buildVaccination('vx-x');
    };
    await pumpForm(tester);
    await selectVaccine(tester, '狂犬疫苗');

    await tester.tap(find.text('已完成'));
    await tester.pumpAndSettle();
    // completed 态不渲染计划日期字段（结构上杜绝 scheduled 带 administeredOn 的反向路径）。
    expect(find.text('计划接种日期'), findsNothing);
    expect(find.text('接种日期'), findsOneWidget);

    await tester.tap(find.text('保存登记'));
    await tester.pumpAndSettle();

    expect(find.text('请选择接种日期'), findsOneWidget);
    expect(createCalls, 0);
  });

  testWidgets('scheduled 登记成功：请求形状精确对齐契约 + succeeded', (tester) async {
    CreateVaccinationRequest? captured;
    repository.createVaccinationHandler = (petId, request) async {
      expect(petId, 'p-1');
      captured = request;
      return buildVaccination('vx-new');
    };

    await pumpForm(tester);
    await selectVaccine(tester, '狂犬疫苗');
    await tester.enterText(
      find.widgetWithText(TextFormField, '剂次标签（可选）'),
      '第一针',
    );
    await pickDate(tester, '计划接种日期');

    await tester.tap(find.text('保存登记'));
    await tester.pumpAndSettle();

    final json = captured!.toJson();
    expect(json['vaccineId'], 'v-1');
    expect(json['seriesKey'], 'rabies');
    expect(json['doseNo'], 1);
    expect(json['status'], 'scheduled');
    expect(json['doseLabel'], '第一针');
    expect(json.containsKey('plannedOn'), isTrue);
    // scheduled 不得携带 administeredOn（契约 42201 规则，结构化保证）。
    expect(json.containsKey('administeredOn'), isFalse);
    expect(json.containsKey('nextDueOn'), isFalse);

    expect(find.text('列表基底'), findsOneWidget);
    final succeeded = eventsOf('health_record_create_succeeded');
    expect(succeeded.single!['recordType'], 'vaccine');
    expect(succeeded.single!['photoCount'], 0);
  });

  testWidgets('completed 登记成功：administeredOn 必填已给、无计划日期字段', (tester) async {
    CreateVaccinationRequest? captured;
    repository.createVaccinationHandler = (petId, request) async {
      captured = request;
      return buildVaccination('vx-new');
    };

    await pumpForm(tester);
    await selectVaccine(tester, '狂犬疫苗');
    await tester.tap(find.text('已完成'));
    await tester.pumpAndSettle();
    await pickDate(tester, '接种日期');

    await tester.tap(find.text('保存登记'));
    await tester.pumpAndSettle();

    final json = captured!.toJson();
    expect(json['status'], 'completed');
    expect(json.containsKey('administeredOn'), isTrue);
    expect(json.containsKey('plannedOn'), isFalse);
  });

  testWidgets('40904 同系列同剂次冲突：兜底横幅 + failed 带码', (tester) async {
    repository.createVaccinationHandler = (petId, request) async =>
        throw const VaccinationDoseExistsException(message: '已存在');

    await pumpForm(tester);
    await selectVaccine(tester, '狂犬疫苗');
    await pickDate(tester, '计划接种日期');
    await tester.tap(find.text('保存登记'));
    await tester.pumpAndSettle();

    expect(find.text('该系列该剂次已有记录（40904）；如登记有误，可取消原记录后重新登记'), findsOneWidget);
    expect(find.byType(VaccinationFormPage), findsOneWidget);
    final failed = eventsOf('health_record_create_failed');
    expect(failed.single!['errorCode'], 40904);
    expect(failed.single!['httpStatus'], 409);
  });

  testWidgets('42201 状态-日期规则后端兜底：横幅提示 + failed 带码', (tester) async {
    repository.createVaccinationHandler = (petId, request) async =>
        throw const VaccinationRuleException(
          message: 'scheduled 必须提供 plannedOn',
        );

    await pumpForm(tester);
    await selectVaccine(tester, '狂犬疫苗');
    await pickDate(tester, '计划接种日期');
    await tester.tap(find.text('保存登记'));
    await tester.pumpAndSettle();

    expect(find.text('接种状态与日期不符合规则，请核对后重试'), findsOneWidget);
    final failed = eventsOf('health_record_create_failed');
    expect(failed.single!['errorCode'], 42201);
    expect(failed.single!['httpStatus'], 422);
    expect(failed.single!['failureReason'], 'validation_error');
  });

  testWidgets('剂次非法（0）拦截', (tester) async {
    await pumpForm(tester);
    await selectVaccine(tester, '狂犬疫苗');
    await tester.enterText(find.widgetWithText(TextFormField, '剂次'), '0');
    await pickDate(tester, '计划接种日期');

    await tester.tap(find.text('保存登记'));
    await tester.pumpAndSettle();

    expect(find.text('剂次需为 1~32767 的整数'), findsOneWidget);
  });
}