import { describe, it, expect } from 'vitest';
import { QueryResult } from './query-result';
import type { ApiError } from './api/error';

describe('QueryResult', () => {
  describe('initialization', () => {
    it('should initialize with null data', () => {
      const result = new QueryResult<string, void>();
      expect(result.data.value).toBeNull();
    });

    it('should initialize with null error', () => {
      const result = new QueryResult<string, void>();
      expect(result.error.value).toBeNull();
    });

    it('should initialize with loading as false', () => {
      const result = new QueryResult<string, void>();
      expect(result.loading.value).toBe(false);
    });

    it('should have run property (initially undefined)', () => {
      const result = new QueryResult<string, void>();
      expect(result).toHaveProperty('run');
    });
  });

  describe('reactive properties', () => {
    it('should have reactive data ref', () => {
      const result = new QueryResult<{ id: number }, void>();
      result.data.value = { id: 1 };
      expect(result.data.value).toEqual({ id: 1 });
    });

    it('should have reactive error ref', () => {
      const result = new QueryResult<string, void>();
      const error: ApiError = { message: 'Test error', success: false };
      result.error.value = error;
      expect(result.error.value).toEqual(error);
    });

    it('should have reactive loading ref', () => {
      const result = new QueryResult<string, void>();
      result.loading.value = true;
      expect(result.loading.value).toBe(true);
    });
  });

  describe('type safety', () => {
    it('should accept generic type for data', () => {
      interface TestData {
        name: string;
        count: number;
      }
      const result = new QueryResult<TestData, void>();
      result.data.value = { name: 'test', count: 42 };
      expect(result.data.value.name).toBe('test');
      expect(result.data.value.count).toBe(42);
    });

    it('should accept generic type for payload', () => {
      interface ResponseData {
        success: boolean;
      }
      interface PayloadData {
        input: string;
      }
      const result = new QueryResult<ResponseData, PayloadData>();
      // PayloadT is used by the run function signature
      expect(result).toHaveProperty('run');
    });
  });

  describe('run method assignment', () => {
    it('should allow run method to be assigned', async () => {
      const result = new QueryResult<string, void>();
      let called = false;
      result.run = async () => {
        called = true;
      };

      await result.run();
      expect(called).toBe(true);
    });

    it('should allow run method to accept payload parameter', async () => {
      const result = new QueryResult<string, { data: string }>();
      let receivedPayload: { data: string } | undefined;

      result.run = async (payload) => {
        receivedPayload = payload;
      };

      await result.run({ data: 'test' });
      expect(receivedPayload).toEqual({ data: 'test' });
    });
  });
});