/**
 * Weather integration tests.
 * Covers WEATHER-001 to WEATHER-007.
 *
 * External API calls (Open-Meteo) are mocked via vi.mock.
 */
import { describe, it, expect, vi, beforeAll, beforeEach, afterAll } from 'vitest';
import request from 'supertest';
import type { Application } from 'express';

const { testDb, dbMock } = vi.hoisted(() => {
  const Database = require('better-sqlite3');
  const db = new Database(':memory:');
  db.exec('PRAGMA journal_mode = WAL');
  db.exec('PRAGMA foreign_keys = ON');
  db.exec('PRAGMA busy_timeout = 5000');
  const mock = {
    db,
    closeDb: () => {},
    reinitialize: () => {},
    getPlaceWithTags: (placeId: number) => {
      const place: any = db.prepare(`SELECT p.*, c.name as category_name, c.color as category_color, c.icon as category_icon FROM places p LEFT JOIN categories c ON p.category_id = c.id WHERE p.id = ?`).get(placeId);
      if (!place) return null;
      const tags = db.prepare(`SELECT t.* FROM tags t JOIN place_tags pt ON t.id = pt.tag_id WHERE pt.place_id = ?`).all(placeId);
      return { ...place, category: place.category_id ? { id: place.category_id, name: place.category_name, color: place.category_color, icon: place.category_icon } : null, tags };
    },
    canAccessTrip: (tripId: any, userId: number) =>
      db.prepare(`SELECT t.id, t.user_id FROM trips t LEFT JOIN trip_members m ON m.trip_id = t.id AND m.user_id = ? WHERE t.id = ? AND (t.user_id = ? OR m.user_id IS NOT NULL)`).get(userId, tripId, userId),
    isOwner: (tripId: any, userId: number) =>
      !!db.prepare('SELECT id FROM trips WHERE id = ? AND user_id = ?').get(tripId, userId),
  };
  return { testDb: db, dbMock: mock };
});

vi.mock('../../src/db/database', () => dbMock);
vi.mock('../../src/config', () => ({
  JWT_SECRET: 'test-jwt-secret-for-trek-testing-only',
  ENCRYPTION_KEY: 'a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6a7b8c9d0e1f2a3b4c5d6a7b8c9d0e1f2',
  updateJwtSecret: () => {},
}));

// Prevent real HTTP calls to Open-Meteo
vi.stubGlobal('fetch', vi.fn().mockResolvedValue({
  ok: true,
  json: () => Promise.resolve({
    current: { temperature_2m: 22, weathercode: 1, windspeed_10m: 10, relativehumidity_2m: 60, precipitation: 0 },
    daily: {
      time: ['2025-06-01'],
      temperature_2m_max: [25],
      temperature_2m_min: [18],
      weathercode: [1],
      precipitation_sum: [0],
      windspeed_10m_max: [15],
      sunrise: ['2025-06-01T06:00'],
      sunset: ['2025-06-01T21:00'],
    },
  }),
}));

import { createApp } from '../../src/app';
import { createTables } from '../../src/db/schema';
import { runMigrations } from '../../src/db/migrations';
import { resetTestDb } from '../helpers/test-db';
import { createUser } from '../helpers/factories';
import { authCookie } from '../helpers/auth';
import { loginAttempts, mfaAttempts } from '../../src/routes/auth';

const app: Application = createApp();

beforeAll(() => {
  createTables(testDb);
  runMigrations(testDb);
});

beforeEach(() => {
  resetTestDb(testDb);
  loginAttempts.clear();
  mfaAttempts.clear();
});

afterAll(() => {
  testDb.close();
  vi.unstubAllGlobals();
});

describe('Weather validation', () => {
  it('WEATHER-001 — GET /weather without lat/lng returns 400', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .get('/api/weather')
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(400);
  });

  it('WEATHER-001 — GET /weather without lng returns 400', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .get('/api/weather?lat=48.8566')
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(400);
  });

  it('WEATHER-005 — GET /weather/detailed without date returns 400', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .get('/api/weather/detailed?lat=48.8566&lng=2.3522')
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(400);
  });

  it('WEATHER-001 — GET /weather without auth returns 401', async () => {
    const res = await request(app)
      .get('/api/weather?lat=48.8566&lng=2.3522');
    expect(res.status).toBe(401);
  });
});

describe('Weather with mocked API', () => {
  it('WEATHER-001 — GET /weather with lat/lng returns weather data', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .get('/api/weather?lat=48.8566&lng=2.3522')
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('temp');
    expect(res.body).toHaveProperty('main');
  });

  it('WEATHER-002 — GET /weather?date=future returns forecast data', async () => {
    const { user } = createUser(testDb);
    const futureDate = new Date();
    futureDate.setDate(futureDate.getDate() + 5);
    const dateStr = futureDate.toISOString().slice(0, 10);

    const res = await request(app)
      .get(`/api/weather?lat=48.8566&lng=2.3522&date=${dateStr}`)
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('temp');
    expect(res.body).toHaveProperty('type');
  });

  it('WEATHER-006 — GET /weather accepts lang parameter', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .get('/api/weather?lat=48.8566&lng=2.3522&lang=en')
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('temp');
  });

  it('WEATHER-007 — GET /weather returns 500 on non-ok API response (ApiError path)', async () => {
    const { user } = createUser(testDb);
    // Use unique coords to avoid cache from previous tests
    vi.mocked(global.fetch as any).mockResolvedValueOnce({
      ok: false,
      status: 503,
      json: () => Promise.resolve({ error: true, reason: 'Service unavailable' }),
    });
    const futureDate = new Date();
    futureDate.setDate(futureDate.getDate() + 3);
    const dateStr = futureDate.toISOString().slice(0, 10);

    const res = await request(app)
      .get(`/api/weather?lat=55.0&lng=25.0&date=${dateStr}`)
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(503);
    expect(res.body).toHaveProperty('error');
  });

  it('WEATHER-008 — GET /weather returns 500 on network error (generic error path)', async () => {
    const { user } = createUser(testDb);
    vi.mocked(global.fetch as any).mockRejectedValueOnce(new Error('Network error'));
    const futureDate = new Date();
    futureDate.setDate(futureDate.getDate() + 4);
    const dateStr = futureDate.toISOString().slice(0, 10);

    const res = await request(app)
      .get(`/api/weather?lat=56.0&lng=26.0&date=${dateStr}`)
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(500);
    expect(res.body).toHaveProperty('error');
  });

  it('WEATHER-009 — GET /weather/detailed returns detailed weather data', async () => {
    const { user } = createUser(testDb);
    const futureDate = new Date();
    futureDate.setDate(futureDate.getDate() + 2);
    const dateStr = futureDate.toISOString().slice(0, 10);

    // Override mock with full detailed forecast response
    vi.mocked(global.fetch as any).mockResolvedValueOnce({
      ok: true,
      json: () => Promise.resolve({
        daily: {
          time: [dateStr],
          temperature_2m_max: [24],
          temperature_2m_min: [16],
          weathercode: [1],
          precipitation_sum: [0],
          windspeed_10m_max: [12],
          sunrise: [`${dateStr}T06:00`],
          sunset: [`${dateStr}T21:00`],
          precipitation_probability_max: [10],
        },
        hourly: {
          time: [`${dateStr}T12:00`],
          temperature_2m: [20],
          precipitation_probability: [5],
          precipitation: [0],
          weathercode: [1],
          windspeed_10m: [10],
          relativehumidity_2m: [55],
        },
      }),
    });

    const res = await request(app)
      .get(`/api/weather/detailed?lat=50.0&lng=10.0&date=${dateStr}`)
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('temp');
    expect(res.body.type).toBe('forecast');
  });

  it('WEATHER-010 — GET /weather/detailed returns error status on ApiError', async () => {
    const { user } = createUser(testDb);
    vi.mocked(global.fetch as any).mockResolvedValueOnce({
      ok: false,
      status: 502,
      json: () => Promise.resolve({ error: true, reason: 'Bad Gateway' }),
    });
    const futureDate = new Date();
    futureDate.setDate(futureDate.getDate() + 6);
    const dateStr = futureDate.toISOString().slice(0, 10);

    const res = await request(app)
      .get(`/api/weather/detailed?lat=57.0&lng=27.0&date=${dateStr}`)
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(502);
    expect(res.body).toHaveProperty('error');
  });

  it('WEATHER-011 — GET /weather/detailed returns 500 on network error', async () => {
    const { user } = createUser(testDb);
    vi.mocked(global.fetch as any).mockRejectedValueOnce(new Error('Network error'));
    const futureDate = new Date();
    futureDate.setDate(futureDate.getDate() + 7);
    const dateStr = futureDate.toISOString().slice(0, 10);

    const res = await request(app)
      .get(`/api/weather/detailed?lat=58.0&lng=28.0&date=${dateStr}`)
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(500);
    expect(res.body).toHaveProperty('error');
  });
});
