import 'dart:convert';

import 'package:cyberhybridhub_server/alpaca/alpaca_env.dart';
import 'package:cyberhybridhub_server/alpaca/alpaca_models.dart';
import 'package:cyberhybridhub_server/alpaca/alpaca_trading_client.dart';
import 'package:http/http.dart' as http;
import 'package:test/test.dart';

import '../helpers/fixture_loader.dart';
import '../helpers/mock_http_client.dart';

void main() {
  late AlpacaEnv env;
  late FixtureLoader fixtures;

  setUp(() {
    env = AlpacaEnv.fromMap(<String, String>{
      'ALPACA_API_KEY_ID': 'test-key-id',
      'ALPACA_API_SECRET_KEY': 'test-secret',
      'ALPACA_TRADING_BASE_URL': AlpacaEnv.defaultPaperTradingUrl,
      'ALPACA_DATA_BASE_URL': AlpacaEnv.defaultDataUrl,
      'ALPACA_DATA_FEED': 'iex',
    });
    fixtures = FixtureLoader();
  });

  group('AlpacaTradingClient.submitOrder', () {
    test('POSTs to /v2/orders with credentials and parses response', () async {
      final MockHttpClient http = MockHttpClient();
      http.whenPost(
        '/v2/orders',
        Response.json(
          await fixtures.loadJson('alpaca_order_accepted.json'),
          statusCode: 201,
        ),
      );

      final AlpacaTradingClient client =
          AlpacaTradingClient(env: env, httpClient: http);
      final AlpacaOrderRequest request = AlpacaOrderRequest(
        symbol: 'SPY',
        side: 'buy',
        type: 'market',
        timeInForce: 'day',
        clientOrderId: 'test-uid-spy_dip-q123',
        notional: 10,
      );

      final AlpacaOrderResponse response = await client.submitOrder(request);

      expect(response.id, '904837e3-3b76-47ec-b432-046db621571b');
      expect(response.clientOrderId, 'test-uid-spy_dip-q123');
      expect(response.status, 'accepted');
      expect(response.symbol, 'SPY');
      expect(response.side, 'buy');
      expect(response.type, 'market');
      expect(response.notional, 10);

      expect(http.requests, hasLength(1));
      final request_ = http.requests.first;
      expect(request_.method, 'POST');
      expect(request_.url.path, '/v2/orders');
      expect(request_.headers['APCA-API-KEY-ID'], 'test-key-id');
      expect(request_.headers['APCA-API-SECRET-KEY'], 'test-secret');
      expect(request_.headers['content-type'], contains('application/json'));

      final Map<String, dynamic> sent =
          jsonDecode(http.capturedBodies.first) as Map<String, dynamic>;
      expect(sent['symbol'], 'SPY');
      expect(sent['side'], 'buy');
      expect(sent['type'], 'market');
      expect(sent['time_in_force'], 'day');
      expect(sent['client_order_id'], 'test-uid-spy_dip-q123');
      expect(sent['notional'], 10);
    });

    test('throws AlpacaTradingDuplicateClientOrderIdException on 422 dup',
        () async {
      final MockHttpClient http = MockHttpClient();
      http.whenPost(
        '/v2/orders',
        Response.json(
          await fixtures.loadJson('alpaca_order_duplicate_client_id.json'),
          statusCode: 422,
        ),
      );

      final AlpacaTradingClient client =
          AlpacaTradingClient(env: env, httpClient: http);

      expect(
        () => client.submitOrder(
          AlpacaOrderRequest(
            symbol: 'SPY',
            side: 'buy',
            type: 'market',
            timeInForce: 'day',
            clientOrderId: 'duplicate',
            notional: 10,
          ),
        ),
        throwsA(isA<AlpacaTradingDuplicateClientOrderIdException>()),
      );
    });

    test('refuses live URL when ALPACA_ALLOW_LIVE=false', () async {
      final AlpacaEnv liveEnv = AlpacaEnv.fromMap(<String, String>{
        'ALPACA_API_KEY_ID': 'k',
        'ALPACA_API_SECRET_KEY': 's',
        'ALPACA_TRADING_BASE_URL': 'https://api.alpaca.markets',
      });
      final AlpacaTradingClient client =
          AlpacaTradingClient(env: liveEnv, httpClient: MockHttpClient());

      expect(
        () => client.submitOrder(
          AlpacaOrderRequest(
            symbol: 'SPY',
            side: 'buy',
            type: 'market',
            timeInForce: 'day',
            clientOrderId: 'x',
            notional: 10,
          ),
        ),
        throwsStateError,
      );
    });
  });

  group('AlpacaTradingClient.getOrderByClientOrderId', () {
    test('returns parsed response when found', () async {
      final MockHttpClient http = MockHttpClient();
      http.whenGet(
        '/v2/orders:by_client_order_id',
        Response.json(await fixtures.loadJson('alpaca_order_accepted.json')),
      );

      final AlpacaTradingClient client =
          AlpacaTradingClient(env: env, httpClient: http);
      final AlpacaOrderResponse? order =
          await client.getOrderByClientOrderId('test-uid-spy_dip-q123');

      expect(order, isNotNull);
      expect(order!.id, '904837e3-3b76-47ec-b432-046db621571b');
      expect(http.requests.single.url.queryParameters['client_order_id'],
          'test-uid-spy_dip-q123');
    });

    test('returns null on 404', () async {
      final MockHttpClient http = MockHttpClient();
      http.whenGet(
        '/v2/orders:by_client_order_id',
        Response.json(<String, dynamic>{'error': 'not found'}, statusCode: 404),
      );

      final AlpacaTradingClient client =
          AlpacaTradingClient(env: env, httpClient: http);

      expect(await client.getOrderByClientOrderId('missing'), isNull);
    });
  });
}

/// Tiny helper for building canned `http.Response` values from JSON fixtures.
class Response {
  static http.Response json(Map<String, dynamic> body, {int statusCode = 200}) {
    return http.Response(
      jsonEncode(body),
      statusCode,
      headers: <String, String>{'content-type': 'application/json'},
    );
  }
}