import { expect, test } from '@playwright/test';
import fs from 'node:fs';

const username = process.env.OIKOS_E2E_USERNAME;
const password = process.env.OIKOS_E2E_PASSWORD_FILE
  ? fs.readFileSync(process.env.OIKOS_E2E_PASSWORD_FILE, 'utf8').trim()
  : process.env.OIKOS_E2E_PASSWORD;

async function attachDiagnostics(testInfo, diagnostics) {
  await testInfo.attach('oikos-flow-diagnostics.json', {
    body: JSON.stringify(diagnostics, null, 2),
    contentType: 'application/json',
  });
}


async function dismissOnboardingIfPresent(page) {
  const skip = page.getByRole('button', { name: /^(Skip|Spring over|Senere|Close|Luk)$/i }).first();
  try {
    if (await skip.isVisible({ timeout: 2_000 })) await skip.click();
  } catch {
    // Onboarding is optional; ignore when it is not present.
  }
}

async function login(page) {
  if (!username || !password) {
    throw new Error('Set OIKOS_E2E_USERNAME and OIKOS_E2E_PASSWORD_FILE (preferred) or OIKOS_E2E_PASSWORD for the live Oikos E2E flow.');
  }

  await page.goto('/login', { waitUntil: 'domcontentloaded' });
  await page.locator('#username').fill(username);
  await page.locator('#password').fill(password);

  const loginResponsePromise = page.waitForResponse((res) => res.url().includes('/api/v1/auth/login'));
  await page.locator('#login-btn').click();
  const loginResponse = await loginResponsePromise;
  if (!loginResponse.ok()) throw new Error(`Login failed with HTTP ${loginResponse.status()}`);
  await page.waitForURL((url) => !url.pathname.includes('/login'), { timeout: 20_000 });
  await expect(page.locator('#main-content')).toBeVisible();
  await dismissOnboardingIfPresent(page);
}

test.describe('Oikos Kitchen + Assist meal-planning flow', () => {
  test('Kitchen opens quickly, Studio is present, and Assist routes meal plans into Studio', async ({ page }, testInfo) => {
    const diagnostics = {
      consoleErrors: [],
      pageErrors: [],
      failedRequests: [],
      timings: {},
      urls: [],
    };

    page.on('console', (msg) => {
      if (['error', 'warning'].includes(msg.type())) diagnostics.consoleErrors.push(`${msg.type()}: ${msg.text()}`);
    });
    page.on('pageerror', (err) => diagnostics.pageErrors.push(err.stack || err.message));
    page.on('requestfailed', (req) => diagnostics.failedRequests.push(`${req.method()} ${req.url()} :: ${req.failure()?.errorText || 'failed'}`));
    page.on('framenavigated', (frame) => {
      if (frame === page.mainFrame()) diagnostics.urls.push(page.url());
    });

    await page.addInitScript(() => localStorage.setItem('oikos-onboarded', '1'));
    await login(page);
    await page.evaluate(() => localStorage.setItem('oikos-onboarded', '1'));

    await page.goto('/', { waitUntil: 'domcontentloaded' });
    await dismissOnboardingIfPresent(page);
    const kitchenNav = page.locator('#sidebar-kitchen-nav, #kitchen-btn').filter({ visible: true }).first();
    await expect(kitchenNav).toBeVisible();

    const kitchenStart = Date.now();
    await kitchenNav.click();
    await page.waitForURL(/\/meals(?:$|[?#])/, { timeout: 15_000 });
    await expect(page.locator('[data-oikos-meal-plan-studio]')).toBeVisible({ timeout: 15_000 });
    await expect(page.getByRole('button', { name: /Meal Plan Studio|Generér ugeplan|Regenerér/i }).first()).toBeVisible();
    diagnostics.timings.kitchenOpenMs = Date.now() - kitchenStart;

    expect(diagnostics.timings.kitchenOpenMs, 'Kitchen menu should open fast enough for real use').toBeLessThan(6_000);

    const studioHost = page.locator('[data-oikos-meal-plan-studio]');
    await expect(studioHost).toContainText(/Meal Plan Studio/i);

    const assistPrompt = 'Lav en praktisk madplan for næste uge ud fra vores opskrifter.';
    const assistStart = Date.now();
    await page.evaluate((prompt) => window.oikos?.openAssist?.({ prompt, expanded: true }), assistPrompt);
    await expect(page.locator('#oikos-assist-root .assist-panel--open')).toBeVisible();
    await expect(page.locator('#oikos-assist-root .assist-message--ai').last()).not.toContainText('Tænker…', { timeout: 60_000 });
    diagnostics.timings.assistMealPlanMs = Date.now() - assistStart;

    const action = page.locator('[data-assist-kitchen-studio]').last();
    await expect(action, 'Assist meal-plan response should include “Åbn forslag i Køkken”, not only text').toBeVisible({ timeout: 10_000 });

    await action.click();
    await page.waitForURL(/\/meals(?:$|[?#])/, { timeout: 15_000 });
    await expect(studioHost.locator('[data-assist-studio-confirm]')).toBeVisible({ timeout: 15_000 });
    await expect(studioHost.locator('[data-assist-studio-title]')).toHaveCount(7, { timeout: 15_000 });
    await expect(studioHost).toContainText(/Madlavere & familiepræferencer|Børnenes madplan|Måltidshistorik/i);

    expect(diagnostics.pageErrors, 'No browser page errors during Kitchen/Assist flow').toEqual([]);
    await attachDiagnostics(testInfo, diagnostics);
  });
});