import 'package:halkyon_base_server/base.dart';
import 'package:halkyon_llm/halkyon_llm.dart';
import 'package:serverpod/serverpod.dart' show UuidValue;
import 'package:test/test.dart';

void main() {
  final idKey = 'i' * assistantIdKeyMinLength;
  final claude = {
    'ASSISTANTS': 'claude',
    'ASSISTANT_ID_KEY': idKey,
    'ASSISTANT_CLAUDE_NAME': 'Claude Sonnet',
    'ASSISTANT_CLAUDE_PROTOCOL': 'anthropic',
    'ASSISTANT_CLAUDE_MODEL': 'claude-sonnet-5-5',
    'ASSISTANT_CLAUDE_KEY': 'sk-ant-key',
  };

  Matcher refusedNaming(String text) => throwsA(
    isA<StateError>().having(
      (error) => error.message,
      'message',
      contains(text),
    ),
  );

  group("The operator's assistants (deploy/assistants.env, ADR 0021, D37)", () {
    test('none set: no assistant, no personal keys', () {
      final assistants = assistantsFrom(<String, String>{}.get);
      expect(assistants.all, isEmpty);
      expect(assistants.ownKeys, isFalse);
      expect(assistants.currency, 'USD');
      expect(assistants.idKey, isNull);
    });

    test('empty values count as unset, as Compose passes them on', () {
      expect(
        assistantsFrom({'ASSISTANTS': '', 'ASSISTANT_OWN_KEYS': ''}.get).all,
        isEmpty,
      );
    });

    test('one is read with its name, protocol, model and key, on the '
        "provider's own address", () {
      final assistant = assistantsFrom(claude.get).all.single;
      expect(assistant.id, 'claude');
      expect(assistant.name, 'Claude Sonnet');
      expect(assistant.endpoint.protocol, LlmProtocol.anthropic);
      expect(assistant.endpoint.model, 'claude-sonnet-5-5');
      expect(assistant.endpoint.apiKey, 'sk-ant-key');
      expect(
        assistant.endpoint.baseUrl,
        Uri.parse('https://api.anthropic.com'),
      );
      expect(assistant.images, isFalse);
      expect(assistant.prices, isNull);
    });

    test('several, in the order listed, by comma or space, whatever their '
        'case; a name defaults to the ID', () {
      final assistants = assistantsFrom(
        {
          ...claude,
          'ASSISTANTS': ' Claude, gpt  local ',
          'ASSISTANT_GPT_PROTOCOL': 'openai-responses',
          'ASSISTANT_GPT_MODEL': 'gpt-6-astra',
          'ASSISTANT_GPT_KEY': 'sk-key',
          'ASSISTANT_LOCAL_PROTOCOL': 'openai',
          'ASSISTANT_LOCAL_BASE_URL': 'http://ollama:11434/v1',
          'ASSISTANT_LOCAL_MODEL': 'qwen3:8b',
        }.get,
      );
      expect(
        [for (final a in assistants.all) a.id],
        ['claude', 'gpt', 'local'],
      );
      expect(assistants.named('gpt')!.name, 'gpt');
      expect(
        assistants.named('gpt')!.endpoint.protocol,
        LlmProtocol.openaiResponses,
      );
      expect(assistants.named('local')!.endpoint.apiKey, '');
      expect(
        assistants.named('local')!.endpoint.baseUrl,
        Uri.parse('http://ollama:11434/v1'),
      );
      expect(assistants.named('nobody'), isNull);
    });

    test('images and personal keys only where on', () {
      final assistants = assistantsFrom(
        {
          ...claude,
          'ASSISTANT_CLAUDE_IMAGES': 'on',
          'ASSISTANT_OWN_KEYS': 'ON',
        }.get,
      );
      expect(assistants.all.single.images, isTrue);
      expect(assistants.ownKeys, isTrue);
      expect(
        assistantsFrom({...claude, 'ASSISTANT_CLAUDE_IMAGES': 'off'}.get)
            .all
            .single
            .images,
        isFalse,
      );
      expect(assistantsFrom({'ASSISTANT_OWN_KEYS': 'on'}.get).ownKeys, isTrue);
    });

    test('prices per million tokens, both or none, in the currency set '
        '(D38)', () {
      final assistants = assistantsFrom(
        {
          ...claude,
          'ASSISTANT_CLAUDE_PRICE_INPUT': '3',
          'ASSISTANT_CLAUDE_PRICE_OUTPUT': '15.50',
          'ASSISTANT_CURRENCY': 'eur',
        }.get,
      );
      final prices = assistants.all.single.prices!;
      expect((prices.input, prices.output), (3.0, 15.5));
      expect(assistants.currency, 'EUR');
      // 1,000 input tokens at 3 and 200 output at 15.50 per million:
      // 0.003 + 0.0031, in millionths.
      expect(prices.costMicros(inputTokens: 1000, outputTokens: 200), 6100);
    });

    group('refuse what would go wrong later, so the server stops', () {
      test('an ID that is no name of a variable', () {
        expect(
          () => assistantsFrom({...claude, 'ASSISTANTS': 'claude, gpt-4'}.get),
          refusedNaming('gpt-4'),
        );
      });

      test('an ID twice', () {
        expect(
          () => assistantsFrom({...claude, 'ASSISTANTS': 'claude claude'}.get),
          refusedNaming('twice'),
        );
      });

      test('a protocol missing or unknown, naming those there are', () {
        expect(
          () => assistantsFrom(
            ({...claude}..remove('ASSISTANT_CLAUDE_PROTOCOL')).get,
          ),
          refusedNaming('ASSISTANT_CLAUDE_PROTOCOL'),
        );
        expect(
          () => assistantsFrom(
            {...claude, 'ASSISTANT_CLAUDE_PROTOCOL': 'claude'}.get,
          ),
          refusedNaming('anthropic, openai, openai-responses'),
        );
      });

      test('a model missing', () {
        expect(
          () => assistantsFrom(
            ({...claude}..remove('ASSISTANT_CLAUDE_MODEL')).get,
          ),
          refusedNaming('ASSISTANT_CLAUDE_MODEL'),
        );
      });

      test("a key missing for the provider's own address", () {
        expect(
          () =>
              assistantsFrom(({...claude}..remove('ASSISTANT_CLAUDE_KEY')).get),
          refusedNaming('ASSISTANT_CLAUDE_KEY'),
        );
      });

      test('a base URL that is no address, or http beyond this network', () {
        expect(
          () => assistantsFrom(
            {
              ...claude,
              'ASSISTANT_CLAUDE_BASE_URL': 'http://proxy.example.org',
            }.get,
          ),
          refusedNaming('ASSISTANT_CLAUDE_BASE_URL'),
        );
      });

      test('one price without the other, or one that is no number', () {
        expect(
          () => assistantsFrom(
            {...claude, 'ASSISTANT_CLAUDE_PRICE_INPUT': '3'}.get,
          ),
          refusedNaming('ASSISTANT_CLAUDE_PRICE_OUTPUT'),
        );
        expect(
          () => assistantsFrom(
            {
              ...claude,
              'ASSISTANT_CLAUDE_PRICE_INPUT': '3,00',
              'ASSISTANT_CLAUDE_PRICE_OUTPUT': '15',
            }.get,
          ),
          refusedNaming('ASSISTANT_CLAUDE_PRICE_INPUT'),
        );
        expect(
          () => assistantsFrom(
            {
              ...claude,
              'ASSISTANT_CLAUDE_PRICE_INPUT': '-1',
              'ASSISTANT_CLAUDE_PRICE_OUTPUT': '15',
            }.get,
          ),
          refusedNaming('ASSISTANT_CLAUDE_PRICE_INPUT'),
        );
      });

      test('a switch neither on nor off', () {
        expect(
          () =>
              assistantsFrom({...claude, 'ASSISTANT_CLAUDE_IMAGES': 'yes'}.get),
          refusedNaming('ASSISTANT_CLAUDE_IMAGES'),
        );
        expect(
          () => assistantsFrom({'ASSISTANT_OWN_KEYS': 'true'}.get),
          refusedNaming('ASSISTANT_OWN_KEYS'),
        );
      });

      test('a currency that is no ISO 4217 code', () {
        expect(
          () => assistantsFrom({...claude, 'ASSISTANT_CURRENCY': 'Euro'}.get),
          refusedNaming('ASSISTANT_CURRENCY'),
        );
      });

      test("the opaque IDs' key missing or short where assistants are set "
          '(D30)', () {
        expect(
          () => assistantsFrom(({...claude}..remove('ASSISTANT_ID_KEY')).get),
          refusedNaming('ASSISTANT_ID_KEY'),
        );
        expect(
          () => assistantsFrom({...claude, 'ASSISTANT_ID_KEY': 'short'}.get),
          refusedNaming('ASSISTANT_ID_KEY'),
        );
      });
    });
  });

  group("The provider's opaque ID of a person (D30)", () {
    final assistants = assistantsFrom(claude.get);
    final anna = UuidValue.fromString('0193a3d4-5c6e-7f80-9a1b-2c3d4e5f6a7b');
    final ben = UuidValue.fromString('0193a3d4-5c6e-7f80-9a1b-2c3d4e5f6a7c');

    test('is the same for a person each time, and differs between people', () {
      expect(assistants.personIdOf(anna), assistants.personIdOf(anna));
      expect(assistants.personIdOf(anna), isNot(assistants.personIdOf(ben)));
    });

    test('is 43 characters of base64url, within what every provider takes, '
        'and never the account', () {
      final id = assistants.personIdOf(anna);
      expect(id, matches(RegExp(r'^[A-Za-z0-9_-]{43}$')));
      expect(id, isNot(contains(anna.uuid)));
    });

    test('changes with the key', () {
      final other = assistantsFrom(
        {...claude, 'ASSISTANT_ID_KEY': 'j' * assistantIdKeyMinLength}.get,
      );
      expect(other.personIdOf(anna), isNot(assistants.personIdOf(anna)));
    });
  });
}

extension on Map<String, String> {
  String? get(String name) => this[name];
}