import 'package:flutter_test/flutter_test.dart';
import 'package:halkyon_app/halkyon_app.dart';
import 'package:halkyon_app/testing.dart';

void main() {
  late FakeAgentGateway gateway;
  late AgentsCubit cubit;

  setUp(() {
    gateway = FakeAgentGateway();
    cubit = AgentsCubit(AgentRepository(gateway));
  });

  tearDown(() => cubit.close());

  test('reads whether agents are offered, and the agents', () async {
    await cubit.load();

    expect(cubit.state.offered, isTrue);
    expect(cubit.state.agents, isEmpty);
    expect(cubit.state.shown, isTrue);
  });

  test(
    'shows nothing where none are offered and the person has none',
    () async {
      gateway.isOffered = false;

      await cubit.load();

      expect(cubit.state.shown, isFalse);
    },
  );

  test('still shows the agents made before agents were switched off', () async {
    await cubit.load();
    await cubit.create(name: 'Claude', handle: 'claude_bot');
    gateway.isOffered = false;

    await cubit.load();

    expect(cubit.state.shown, isTrue);
    expect(cubit.state.agents.single.handle, 'claude_bot');
  });

  test(
    'makes an agent, its handle without the @, and hands its token on',
    () async {
      await cubit.load();

      final made = await cubit.create(name: ' Claude ', handle: '@claude_bot');

      expect(made?.token, 'TOKEN-1');
      expect(made?.agent.name, 'Claude');
      expect(cubit.state.agents.single.handle, 'claude_bot');
      expect(cubit.state.busy, isFalse);
    },
  );

  test('refuses a handle someone has, saying so, making nothing', () async {
    gateway.taken.add('claude_bot');
    await cubit.load();

    final made = await cubit.create(name: 'Claude', handle: 'claude_bot');

    expect(made, isNull);
    expect(cubit.state.makeProblem, AgentProblem.handleTaken);
    expect(cubit.state.problem, isNull);
    expect(cubit.state.agents, isEmpty);
  });

  test('refuses more than five agents', () async {
    await cubit.load();
    for (var i = 0; i < maxAgents; i++) {
      await cubit.create(name: '', handle: 'bot$i');
    }

    final made = await cubit.create(name: '', handle: 'bot_more');

    expect(made, isNull);
    expect(cubit.state.makeProblem, AgentProblem.tooMany);
    expect(cubit.state.agents, hasLength(maxAgents));
  });

  test(
    'a new token replaces the one before; taking it back leaves none',
    () async {
      await cubit.load();
      final agent = (await cubit.create(name: '', handle: 'bot'))!.agent;

      final renewed = await cubit.newToken(agent.id);
      expect(renewed?.token, 'TOKEN-2');

      expect(await cubit.revoke(agent.id), isTrue);
      expect(cubit.state.agents.single.hasToken, isFalse);
    },
  );

  test('deletes an agent; one gone already is said to be', () async {
    await cubit.load();
    final agent = (await cubit.create(name: '', handle: 'bot'))!.agent;

    expect(await cubit.delete(agent.id), isTrue);
    expect(cubit.state.agents, isEmpty);

    expect(await cubit.delete(agent.id), isFalse);
    expect(cubit.state.problem, AgentProblem.notFound);
  });

  test('an instance out of reach is said to be', () async {
    gateway.unreachable = true;

    await cubit.load();

    expect(cubit.state.problem, AgentProblem.failed);
    expect(cubit.state.shown, isFalse);
  });
}