import { DyNTS_AI_LLM_ServiceBase } from './ai-llm.service-base';
import { DyFM_AI_CallSettings, DyFM_AI_MessageRole } from '@futdevpro/fsm-dynamo/ai';
import { DyFM_Log, DyFM_Object } from '@futdevpro/fsm-dynamo';

class TestLLMService extends DyNTS_AI_LLM_ServiceBase<DyFM_AI_CallSettings> {
  readonly aiProvider: any = {} as any;
  readonly capabilities: any = {} as any;
  setup = (config: any): void => {};
  testConnection = async (issuer: string): Promise<boolean> => true;
  readonly defaultSettings: DyFM_AI_CallSettings = {
    systemPrompt: 'Test system prompt',
    useModel: 'test-model',
    debugLog: false,
  };

  readonly predefinedRequests = {
    yesNo: {
      upperCaseYes: 'YES',
    },
  };

  requestSimpleMessage = async (set: any): Promise<string> => { return ''; };
  requestYesNo = async (set: any): Promise<boolean> => { return false; };
  requestPercentage = async (set: any): Promise<number> => { return 0; };
  requestSelect = async <T>(set: any): Promise<T | { unparsableResult: string }> => { return null as any; };
  requestMultiselect = async <T>(set: any): Promise<T[] | { unparsableResult: string }> => { return []; };
  requestJSON = async <T>(set: any): Promise<T | { unparsableResult: string }> => { return null as any; };
  requestJSONQuestionWithKeysDescription = async <T>(set: any): Promise<T | { unparsableResult: string }> => { return null as any; };
  requestJSONWithExactKeys = async <T>(set: any): Promise<T | { unparsableResult: string }> => { return null as any; };
  requestList = async <T>(set: any): Promise<T[] | { unparsableResult: string }> => { return []; };

  static getInstance(): TestLLMService {
    return TestLLMService.getSingletonInstance();
  }
}

describe('| DyNTS_AI_LLM_ServiceBase', () => {
  let service: TestLLMService;

  beforeEach(() => {
    service = TestLLMService.getInstance();
  });

  it('| should be a singleton instance', () => {
    const instance1 = TestLLMService.getInstance();
    const instance2 = TestLLMService.getInstance();

    expect(instance1).toBe(instance2);
    expect(instance1).toBeInstanceOf(TestLLMService);
  });

  describe('| defaultSystemPrompt', () => {
    it('| should return system prompt from default settings', () => {
      expect(service.defaultSystemPrompt).toBe('Test system prompt');
    });
  });

  describe('| defaultModel', () => {
    it('| should return model from default settings', () => {
      expect(service.defaultModel).toBe('test-model');
    });
  });

  describe('| debugLog', () => {
    it('| should return debugLog from default settings', () => {
      expect(service.debugLog).toBe(false);
    });

    it('| should return _debugLog when defaultSettings debugLog is not set', () => {
      const serviceWithoutDebugLog = new (class extends TestLLMService {
        override readonly defaultSettings: DyFM_AI_CallSettings = {
          systemPrompt: 'Test',
          useModel: 'test',
        };
        override readonly aiProvider: any = {} as any;
        override readonly capabilities: any = {} as any;
        override setup = (config: any): void => {};
        override testConnection = async (issuer: string): Promise<boolean> => true;
      } as any)();

      // Set _debugLog on the new instance
      serviceWithoutDebugLog._debugLog = true;
      expect(serviceWithoutDebugLog.debugLog).toBe(true);
    });
  });

  describe('| convertAnswerToBoolean', () => {
    it('| should return true when answer contains YES', () => {
      const result = (service as any).convertAnswerToBoolean('YES');

      expect(result).toBe(true);
    });

    it('| should return true when answer contains yes in uppercase', () => {
      const result = (service as any).convertAnswerToBoolean('The answer is YES');

      expect(result).toBe(true);
    });

    it('| should return false when answer does not contain YES', () => {
      const result = (service as any).convertAnswerToBoolean('NO');

      expect(result).toBe(false);
    });

    it('| should be case insensitive', () => {
      const result = (service as any).convertAnswerToBoolean('yes');

      expect(result).toBe(true);
    });
  });

  describe('| convertAnswerToNumber', () => {
    it('| should return number when answer is valid', () => {
      const result = (service as any).convertAnswerToNumber('42', 'What is the answer?');

      expect(result).toBe(42);
    });

    it('| should return null when answer is invalid (contains skip flag)', () => {
      spyOn(service as any, 'isAnswerValid').and.returnValue(true);

      const result = (service as any).convertAnswerToNumber('42', 'What is the answer?');

      expect(result).toBeNull();
    });

    it('| should return null when answer is NaN', () => {
      const logSpy = spyOn(DyFM_Log, 'T_error');
      spyOn(service as any, 'isAnswerValid').and.returnValue(false);

      const result = (service as any).convertAnswerToNumber('not-a-number', 'What is the answer?');

      expect(result).toBeNull();
      expect(logSpy).toHaveBeenCalled();
    });

    it('| should handle decimal numbers', () => {
      const result = (service as any).convertAnswerToNumber('42.5', 'What is the answer?');

      expect(result).toBe(42.5);
    });
  });

  describe('| convertAnswerToSelectOption', () => {
    it('| should return selected option when found', () => {
      const options = ['option1', 'option2', 'option3'];
      spyOn(service as any, 'isAnswerValid').and.returnValue(false);
      spyOn(service as any, 'stringifySelectOptions').and.returnValue(['option1', 'option2', 'option3']);

      const result = (service as any).convertAnswerToSelectOption('option1', 'Select an option', options);

      expect(result).toBe('option1');
    });

    it('| should return null when answer is invalid', () => {
      spyOn(service as any, 'isAnswerValid').and.returnValue(true);

      const result = (service as any).convertAnswerToSelectOption('option1', 'Select an option', ['option1']);

      expect(result).toBeNull();
    });

    it('| should return null when option not found', () => {
      spyOn(service as any, 'isAnswerValid').and.returnValue(false);
      spyOn(service as any, 'stringifySelectOptions').and.returnValue(['option1', 'option2']);

      const result = (service as any).convertAnswerToSelectOption('option3', 'Select an option', ['option1', 'option2']);

      expect(result).toBeNull();
    });

    it('| should handle JSON options', () => {
      const options = [{ id: 1, name: 'test' }];
      spyOn(service as any, 'isAnswerValid').and.returnValue(false);
      spyOn(service as any, 'stringifySelectOptions').and.returnValue([JSON.stringify({ id: 1, name: 'test' })]);
      spyOn(DyFM_Object, 'safeParseJSON').and.returnValue({ id: 1, name: 'test' });

      const result = (service as any).convertAnswerToSelectOption(
        JSON.stringify({ id: 1, name: 'test' }),
        'Select an option',
        options
      );

      expect(result).toEqual({ id: 1, name: 'test' });
    });
  });

  describe('| convertAnswerToSelectOptions', () => {
    it('| should return multiple selected options', () => {
      const options = ['option1', 'option2', 'option3'];
      spyOn(service as any, 'isAnswerValid').and.returnValue(false);
      spyOn(service as any, 'stringifySelectOption').and.callFake((opt: string) => opt);

      const result = (service as any).convertAnswerToSelectOptions('option1 and option2', 'Select options', options);

      expect(result).toEqual(['option1', 'option2']);
    });

    it('| should return null when answer is invalid', () => {
      spyOn(service as any, 'isAnswerValid').and.returnValue(true);

      const result = (service as any).convertAnswerToSelectOptions('option1', 'Select options', ['option1']);

      expect(result).toBeNull();
    });

    it('| should return empty array when no options match', () => {
      spyOn(service as any, 'isAnswerValid').and.returnValue(false);
      spyOn(service as any, 'stringifySelectOption').and.callFake((opt: string) => opt);

      const result = (service as any).convertAnswerToSelectOptions('option4', 'Select options', ['option1', 'option2']);

      expect(result).toEqual([]);
    });
  });

  describe('| convertAnswerToJSON', () => {
    it('| should return parsed JSON when valid', () => {
      const jsonString = '{"key": "value"}';
      spyOn(service as any, 'isAnswerValid').and.returnValue(false);
      spyOn(DyFM_Object, 'safeParseJSON').and.returnValue({ key: 'value' });

      const result = (service as any).convertAnswerToJSON(jsonString, 'Enter JSON') as { key: string };

      expect(result).toEqual({ key: 'value' });
    });

    it('| should return unparsableResult when answer is invalid', () => {
      spyOn(service as any, 'isAnswerValid').and.returnValue(true);

      const result = (service as any).convertAnswerToJSON('{"key": "value"}', 'Enter JSON');

      expect(result).toEqual({ unparsableResult: '{"key": "value"}' });
    });

    it('| should return unparsableResult when JSON is invalid', () => {
      const logSpy = spyOn(DyFM_Log, 'T_error');
      spyOn(service as any, 'isAnswerValid').and.returnValue(false);
      spyOn(DyFM_Object, 'safeParseJSON').and.returnValue({ unparsableResult: 'invalid json' });

      const result = (service as any).convertAnswerToJSON('invalid json', 'Enter JSON');

      expect(result).toEqual({ unparsableResult: 'invalid json' });
      expect(logSpy).toHaveBeenCalled();
    });
  });
});