feat: Refactor result preparation and add contradiction checks

backend/tests/LLMService.refactor.test.ts

@@ -0,0 +1,33 @@
+import { LLMService } from '../src/services/LLMService';
+require('dotenv').config();
+
+describe('LLMService Refactor', () => {
+    let llmService: LLMService;
+
+    beforeAll(() => {
+        const apiKey = process.env.GEMINI_API_KEY;
+        if (!apiKey) {
+            throw new Error('GEMINI_API_KEY is not defined in .env file');
+        }
+        llmService = new LLMService(apiKey);
+    });
+
+    it('should correctly categorize desires based on the rules', async () => {
+        const desireSets = [
+            { participantId: '1', wants: ['Pizza'], accepts: ['Pasta'], noGoes: ['Salad'] },
+            { participantId: '2', wants: ['Pizza'], accepts: ['Pasta'], noGoes: ['Tacos'] },
+        ];
+
+        const result = await llmService.analyzeDesires(desireSets as any);
+
+        expect(result.goTo).toContain('Pizza');
+        expect(result.alsoGood).toContain('Pasta');
+        expect(result.noGoes).toEqual(expect.arrayContaining(['Salad', 'Tacos']));
+    });
+
+    it('should detect inner contradictions in a desire set', async () => {
+        const desireSet = { wants: ['Ice Cream', 'No desserts'], accepts: [], noGoes: [] };
+        const hasContradictions = await llmService.checkForInnerContradictions(desireSet as any);
+        expect(hasContradictions).toBe(true);
+    });
+});