import { Test, TestingModule } from '@nestjs/testing';
import { INestApplication } from '@nestjs/common';
import request from 'supertest';
import { AppModule } from '../src/app.module';

// Mocks to avoid actual OpenAI/Mongo calls if possible, or use real ones if we want integration tests.
// For "testing if states are handled", we ideally want to check the response.
// However, since we are using real LLMs, we might want to mock the FFBLangChainService OR 
// just run it against the real API if the user has keys set up (which they do).
// Let's assume we run against the real app for "integration" style checking of the router.

describe('Agentic Intent Router (E2E)', () => {
    let app: INestApplication;

    beforeAll(async () => {
        const moduleFixture: TestingModule = await Test.createTestingModule({
            imports: [AppModule],
        }).compile();

        app = moduleFixture.createNestApplication();
        await app.init();
    });

    // 1. General Intent
    it('/POST chat (General Intent)', async () => {
        const response = await request(app.getHttpServer())
            .post('/api/ffb-production/chat')
            .send({ message: 'Hi, who are you?' })
            .expect(201);

        console.log('General Response:', response.text);
        // Expect a helpful response, not a database query result
        expect(response.text).toBeTruthy();
    });

    // 2. Clarification Intent (Site mentioned but ambiguous)
    it('/POST chat (Clarification Intent)', async () => {
        const response = await request(app.getHttpServer())
            .post('/api/ffb-production/chat')
            .send({ message: 'Tell me about Site A' })
            .expect(201);

        console.log('Clarify Response:', response.text);
        // Should imply a question back to the user
        expect(response.text.includes('?')).toBeTruthy();
    });

    // 3. Semantic Search Intent
    it('/POST chat (Semantic Search Intent)', async () => {
        const response = await request(app.getHttpServer())
            .post('/api/ffb-production/chat')
            .send({ message: 'Find records about high production at Site A' })
            .expect(201);

        console.log('Semantic Response:', response.text);
        // Should typically return search results or say "Found..."
        // Hard to assert exact text, but checking for success code 201 implies it didn't crash.
        expect(response.text).toBeTruthy();
    });

    // 4. Aggregation Intent (Quantitative)
    it('/POST chat (Aggregate Intent)', async () => {
        const response = await request(app.getHttpServer())
            .post('/api/ffb-production/chat')
            .send({ message: 'What is the total production quantity for Site A?' })
            .expect(201);

        console.log('Aggregate Response:', response.text);
        // Should mention a number or total
        expect(response.text).toBeTruthy();
    });

    afterAll(async () => {
        await app.close();
    });
});