import 'dart:convert';
import 'dart:typed_data';

import 'package:podman/podman.dart';
import 'package:test/test.dart';

import 'support/fake_podman_transport.dart';

void main() {
  group('PodmanClient container runtime API', () {
    test('wait parses numeric status', () async {
      final transport = FakePodmanTransport()
        ..enqueue(
          method: HttpMethod.post,
          path: '/v5.0.0/libpod/containers/web/wait',
          queryParameters: const <String, List<String>>{
            'condition': <String>['stopped'],
          },
          responseBody: '0',
        );

      final client = PodmanClient(transport: transport);
      final result = await client.wait('web');

      expect(result.statusCode, 0);
      transport.expectNoPending();
    });

    test('healthStatus returns parsed healthcheck state', () async {
      final transport = FakePodmanTransport()
        ..enqueue(
          method: HttpMethod.get,
          path: '/v5.0.0/libpod/containers/web/json',
          responseBody: <String, Object?>{
            'Id': 'abc',
            'Name': '/web',
            'ImageName': 'example:latest',
            'State': <String, Object?>{
              'Status': 'running',
              'Healthcheck': <String, Object?>{
                'Status': 'healthy',
                'FailingStreak': 0,
              },
            },
          },
        );

      final client = PodmanClient(transport: transport);
      final status = await client.healthStatus('web');

      expect(status.status, 'healthy');
      expect(status.failingStreak, 0);
      transport.expectNoPending();
    });

    test('supports exec create/start/inspect', () async {
      final framed = _frame(streamType: 1, payload: utf8.encode('hello\n'));

      final transport = FakePodmanTransport()
        ..enqueue(
          method: HttpMethod.post,
          path: '/v5.0.0/libpod/containers/web/exec',
          body: const <String, Object?>{
            'Cmd': <String>['echo', 'hello'],
            'Privileged': false,
            'Tty': false,
            'AttachStdin': false,
            'AttachStdout': true,
            'AttachStderr': true,
          },
          statusCode: 201,
          responseBody: const <String, Object?>{'Id': 'exec-1'},
        )
        ..enqueue(
          method: HttpMethod.post,
          path: '/v5.0.0/libpod/exec/exec-1/start',
          body: const <String, Object?>{'Detach': false, 'Tty': false},
          statusCode: 200,
          responseBody: framed,
        )
        ..enqueue(
          method: HttpMethod.get,
          path: '/v5.0.0/libpod/exec/exec-1/json',
          responseBody: const <String, Object?>{
            'Id': 'exec-1',
            'ContainerID': 'container-1',
            'Running': false,
            'ExitCode': 0,
            'OpenStdout': true,
            'OpenStderr': true,
          },
        );

      final client = PodmanClient(transport: transport);
      final created = await client.createExec(
        'web',
        const ExecCreateOptions(command: <String>['echo', 'hello']),
      );
      final started = await client.startExec(created.id);
      final inspected = await client.inspectExec(created.id);

      expect(created.id, 'exec-1');
      expect(started.stdout, 'hello\n');
      expect(started.stderr, '');
      expect(inspected.exitCode, 0);
      transport.expectNoPending();
    });

    test('reads one-shot stats snapshot', () async {
      final transport = FakePodmanTransport()
        ..enqueue(
          method: HttpMethod.get,
          path: '/v5.0.0/libpod/containers/web/stats',
          queryParameters: const <String, List<String>>{
            'stream': <String>['false'],
          },
          responseBody: const <String, Object?>{
            'Id': 'container-1',
            'name': 'web',
            'read': '2026-04-06T21:00:00Z',
            'cpu_stats': <String, Object?>{
              'cpu_usage': <String, Object?>{'total_usage': 42},
            },
            'memory_stats': <String, Object?>{'usage': 512, 'limit': 1024},
            'pids_stats': <String, Object?>{'current': 3},
          },
        );

      final client = PodmanClient(transport: transport);
      final stats = await client.stats('web');

      expect(stats.id, 'container-1');
      expect(stats.cpuTotalUsage, 42);
      expect(stats.memoryUsage, 512);
      expect(stats.pidsCurrent, 3);
      transport.expectNoPending();
    });

    test('rejects streaming stats for now', () async {
      final client = PodmanClient(transport: FakePodmanTransport());
      expect(() => client.stats('web', stream: true), throwsArgumentError);
    });

    test('supports container and exec tty resize', () async {
      final transport = FakePodmanTransport()
        ..enqueue(
          method: HttpMethod.post,
          path: '/v5.0.0/libpod/containers/web/resize',
          queryParameters: const <String, List<String>>{
            'w': <String>['120'],
            'h': <String>['40'],
            'running': <String>['true'],
          },
          statusCode: 200,
        )
        ..enqueue(
          method: HttpMethod.post,
          path: '/v5.0.0/libpod/exec/exec-1/resize',
          queryParameters: const <String, List<String>>{
            'w': <String>['120'],
            'h': <String>['40'],
          },
          statusCode: 201,
        );

      final client = PodmanClient(transport: transport);
      await client.resizeContainerTty(
        'web',
        width: 120,
        height: 40,
        ignoreNotRunning: true,
      );
      await client.resizeExecTty('exec-1', width: 120, height: 40);

      transport.expectNoPending();
    });

    test('watchStats and watchContainerTop emit polling snapshots', () async {
      final transport = FakePodmanTransport()
        ..enqueue(
          method: HttpMethod.get,
          path: '/v5.0.0/libpod/containers/web/stats',
          queryParameters: const <String, List<String>>{
            'stream': <String>['false'],
          },
          responseBody: const <String, Object?>{
            'Id': 'container-1',
            'name': 'web',
            'cpu_stats': <String, Object?>{
              'cpu_usage': <String, Object?>{'total_usage': 99},
            },
            'memory_stats': <String, Object?>{'usage': 512, 'limit': 1024},
            'pids_stats': <String, Object?>{'current': 2},
          },
        )
        ..enqueue(
          method: HttpMethod.get,
          path: '/v5.0.0/libpod/containers/web/top',
          responseBody: const <String, Object?>{
            'Titles': <String>['PID', 'CMD'],
            'Processes': <Object?>[
              <String>['1', 'dart run bin/orchestrator.dart'],
            ],
          },
        );

      final client = PodmanClient(transport: transport);

      final stats = await client
          .watchStats(
            'web',
            pollInterval: const Duration(milliseconds: 1),
            reconnect: false,
          )
          .first;
      expect(stats.cpuTotalUsage, 99);

      final top = await client
          .watchContainerTop(
            'web',
            pollInterval: const Duration(milliseconds: 1),
            reconnect: false,
          )
          .first;
      expect(top.processes, hasLength(1));

      transport.expectNoPending();
    });
  });
}

List<int> _frame({required int streamType, required List<int> payload}) {
  final header = ByteData(8);
  header.setUint8(0, streamType);
  header.setUint32(4, payload.length, Endian.big);
  return <int>[...header.buffer.asUint8List(), ...payload];
}