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);
}

async function openMealPlanStudioFromAssist(page, diagnostics, prompt = 'Lav en praktisk madplan for næste uge ud fra vores opskrifter.') {
  const assistStart = Date.now();
  await page.waitForFunction(() => window.oikos?.openAssist, { timeout: 15_000 });
  await page.evaluate((message) => window.oikos?.openAssist?.({ prompt: message, expanded: true }), prompt);
  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 });
  const studioHost = page.locator('[data-oikos-meal-plan-studio]');
  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);
  return studioHost;
}

async function deleteMeals(page, mealIds) {
  if (!mealIds.length) return [];
  return page.evaluate(async (ids) => {
    const csrf = document.cookie.split(';')
      .map((c) => c.trim())
      .find((c) => c.startsWith('csrf-token='))
      ?.slice('csrf-token='.length) || '';
    const results = [];
    for (const id of ids) {
      const res = await fetch(`/api/v1/meals/${id}`, {
        method: 'DELETE',
        credentials: 'same-origin',
        headers: { 'Content-Type': 'application/json', 'X-CSRF-Token': decodeURIComponent(csrf) },
      });
      results.push({ id, ok: res.ok, status: res.status });
    }
    return results;
  }, mealIds);
}

async function listMealsById(page, mealIds, weeks = []) {
  return page.evaluate(async ({ ids, weeksToFetch }) => {
    const wanted = new Set(ids.map(String));
    const results = [];
    const mondayFor = (value) => {
      const date = new Date(`${value}T12:00:00Z`);
      const day = date.getUTCDay() || 7;
      date.setUTCDate(date.getUTCDate() - day + 1);
      return date.toISOString().slice(0, 10);
    };
    for (const week of [...new Set(weeksToFetch.filter(Boolean).map(mondayFor))]) {
      const res = await fetch(`/api/v1/meals?week=${encodeURIComponent(week)}`, { credentials: 'same-origin', cache: 'no-store' });
      const payload = await res.json();
      results.push(...(payload.data || []).filter((meal) => wanted.has(String(meal.id))));
    }
    return results;
  }, { ids: mealIds, weeksToFetch: weeks.length ? weeks : [new Date().toISOString().slice(0, 10)] });
}

function makeDiagnostics(page) {
  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());
  });
  return diagnostics;
}

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 = makeDiagnostics(page);

    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);

    await openMealPlanStudioFromAssist(page, diagnostics);

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

  test('Studio supports swap/edit before confirming, then writes and cleans up meals', async ({ page }, testInfo) => {
    test.skip(process.env.OIKOS_E2E_MUTATE !== '1', 'Set OIKOS_E2E_MUTATE=1 to run the live write-and-cleanup confirmation test.');

    const diagnostics = makeDiagnostics(page);
    const createdMealIds = [];
    await page.addInitScript(() => localStorage.setItem('oikos-onboarded', '1'));

    try {
      await login(page);
      await page.goto('/meals', { waitUntil: 'domcontentloaded' });
      await dismissOnboardingIfPresent(page);
      const studioHost = await openMealPlanStudioFromAssist(page, diagnostics, 'Lav en testbar madplan for næste uge. Brug vores opskrifter og åbn den i Meal Plan Studio.');

      const firstSwap = studioHost.locator('[data-assist-studio-swap]').first();
      await expect(firstSwap, 'generated Studio plan should expose at least one swap alternative').toBeVisible();
      const swapResponsePromise = page.waitForResponse((res) => res.url().includes('/ai/api/meal-plan/feedback') && res.request().method() === 'POST');
      await firstSwap.click();
      const swapResponse = await swapResponsePromise;
      expect(swapResponse.ok(), 'swap should be recorded as meal-plan feedback').toBeTruthy();
      const swapPayload = await swapResponse.json();
      expect(swapPayload.source, 'swap feedback should flow through the native meal-planning API').toBe('oikos-native-api');

      const firstTitle = studioHost.locator('[data-assist-studio-title="0"]');
      const originalTitle = await firstTitle.inputValue();
      const editedTitle = `[E2E cleanup] ${originalTitle}`.slice(0, 120);
      await firstTitle.fill(editedTitle);
      const editResponsePromise = page.waitForResponse((res) => res.url().includes('/ai/api/meal-plan/feedback') && res.request().method() === 'POST');
      await firstTitle.dispatchEvent('change');
      const editResponse = await editResponsePromise;
      expect(editResponse.ok(), 'title edit should be recorded as meal-plan feedback').toBeTruthy();
      const editPayload = await editResponse.json();
      expect(editPayload.source, 'edit feedback should flow through the native meal-planning API').toBe('oikos-native-api');

      const actionResponsePromise = page.waitForResponse((res) => res.url().includes('/ai/api/action') && res.request().method() === 'POST');
      await studioHost.locator('[data-assist-studio-confirm]').click();
      const actionResponse = await actionResponsePromise;
      expect(actionResponse.ok(), 'Studio confirmation should call the Assist action endpoint successfully').toBeTruthy();
      const actionPayload = await actionResponse.json();
      expect(actionPayload.success).toBeTruthy();
      const createdMeals = actionPayload.result?.data?.meals || [];
      const cookAssignments = actionPayload.result?.data?.cookAssignments || [];
      expect(cookAssignments.every((item) => item.source === 'oikos-native-api'), 'cook assignments should use the native meal-planning API when present').toBeTruthy();
      createdMealIds.push(...createdMeals.map((meal) => meal?.id).filter(Boolean));
      expect(createdMealIds, 'Studio confirmation should create seven Oikos meals').toHaveLength(7);

      const mealsInOikos = await listMealsById(page, createdMealIds, createdMeals.map((meal) => meal?.date));
      expect(mealsInOikos, 'created meals should be readable from the native Oikos meals API').toHaveLength(7);
      expect(mealsInOikos.some((meal) => String(meal.title || '').includes('[E2E cleanup]'))).toBeTruthy();
    } finally {
      const cleanup = await deleteMeals(page, createdMealIds).catch((err) => [{ error: err.message }]);
      diagnostics.cleanup = cleanup;
      await attachDiagnostics(testInfo, diagnostics);
    }

    expect(diagnostics.pageErrors, 'No browser page errors during confirm/write/cleanup flow').toEqual([]);
  });
});