const { test, expect } = require('@playwright/test');

/**
 * E2E tests for the "Vind inspiratie" feature on Tussendoor 1/2/3
 *
 * The feature opens a bottom sheet (inspiratieSheet) instead of a full tab/page.
 *
 * Prerequisites:
 *  - The app must be served at the configured baseURL
 *  - Run `npx playwright test` from the project root
 *  - Or `LOCAL_TEST=http://localhost:8080 npx playwright test` for local file serving
 */

// Helper: wait for DOM to be fully interactive after navigation
async function waitForApp(page) {
  // Wait for the app shell to be ready
  await page.waitForSelector('#app', { timeout: 15000 });
  // Ensure the IIFE has initialized by checking for bottom nav
  await page.waitForSelector('#navDagboek', { timeout: 10000 });
  // Small delay for async data loading (voedingsmiddelen.json)
  await page.waitForTimeout(500);
}

// Helper: switch to dagboek tab
async function goToDagboek(page) {
  await page.click('#navDagboek');
  await page.waitForTimeout(400);
}

// Helper: open inspiratieSheet via Vind inspiratie button on the first Tussendoor card
async function openInspiratieSheet(page) {
  await goToDagboek(page);
  const inspiratieBtn = page.locator('.vind-inspiratie-btn').first();
  await expect(inspiratieBtn).toBeVisible();
  await inspiratieBtn.click();
  await page.waitForTimeout(500);
  // Verify sheet is open
  await expect(page.locator('#inspiratieSheet')).toBeVisible();
}

test.describe('Vind inspiratie feature (bottom sheet)', () => {

  test('Vind inspiratie button only appears on Tussendoor 1, 2, 3 cards in dagboek', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await goToDagboek(page);

    // Find all eetmoment cards
    const cards = await page.locator('.eetmoment-card').all();
    expect(cards.length).toBeGreaterThanOrEqual(6); // 6 eetmomenten

    for (const card of cards) {
      const nameEl = card.locator('.eetmoment-name');
      const name = await nameEl.textContent();
      const hasInspiratieBtn = await card.locator('.vind-inspiratie-btn').count();

      if (name === 'Tussendoor 1' || name === 'Tussendoor 2' || name === 'Tussendoor 3') {
        expect(hasInspiratieBtn).toBe(1);
      } else {
        expect(hasInspiratieBtn).toBe(0);
      }
    }
  });

  test('Clicking Vind inspiratie opens bottom sheet with correct context title', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await goToDagboek(page);

    // Click the first visible "Vind inspiratie" button (Tussendoor 1)
    const inspiratieBtn = page.locator('.vind-inspiratie-btn').first();
    await expect(inspiratieBtn).toBeVisible();
    await inspiratieBtn.click();

    await page.waitForTimeout(500);

    // Should now have the inspiratieSheet open (bottom sheet)
    const sheet = page.locator('#inspiratieSheet');
    await expect(sheet).toBeVisible();
    await expect(sheet).not.toHaveClass(/hidden/);

    // Sheet title should start with "Inspiratie voor Tussendoor"
    const title = page.locator('#inspiratieSheetTitle');
    const titleText = await title.textContent();
    expect(titleText).toContain('Inspiratie voor Tussendoor');
  });

  test('Afsluiten X-knop sluit bottom sheet en keert terug naar Dagboek', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await goToDagboek(page);

    // Open inspiratie sheet
    const inspiratieBtn = page.locator('.vind-inspiratie-btn').first();
    await inspiratieBtn.click();
    await page.waitForTimeout(500);

    // Sheet should be open
    await expect(page.locator('#inspiratieSheet')).toBeVisible();

    // Click X close button
    await page.click('#inspiratieSheetClose');
    await page.waitForTimeout(500);

    // Sheet should be hidden
    await expect(page.locator('#inspiratieSheet')).toHaveClass(/hidden/);

    // Dagboek should still be active
    await expect(page.locator('#navDagboek')).toHaveClass(/active/);
  });

  test('Afsluiten via backdrop-click sluit bottom sheet en keert terug naar Dagboek', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await goToDagboek(page);

    // Open inspiratie sheet
    const inspiratieBtn = page.locator('.vind-inspiratie-btn').first();
    await inspiratieBtn.click();
    await page.waitForTimeout(500);

    // Sheet should be open
    await expect(page.locator('#inspiratieSheet')).toBeVisible();

    // Click the overlay backdrop (not the sheet content)
    const overlay = page.locator('#inspiratieSheet');
    // Click outside the modal-sheet area (the overlay itself)
    await overlay.click({ position: { x: 10, y: 10 } });
    await page.waitForTimeout(500);

    // Sheet should be hidden
    await expect(page.locator('#inspiratieSheet')).toHaveClass(/hidden/);

    // Dagboek should still be active
    await expect(page.locator('#navDagboek')).toHaveClass(/active/);
  });

  test('Vind inspiratie shows context header with date and moment name in sheet', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await goToDagboek(page);

    // Click first Vind inspiratie button
    const inspiratieBtn = page.locator('.vind-inspiratie-btn').first();
    await inspiratieBtn.click();
    await page.waitForTimeout(500);

    // Context header should be visible in the sheet
    const contextEl = page.locator('#inspiratieContext');
    await expect(contextEl).toBeVisible();

    // Context label should contain the moment name
    const contextLabel = page.locator('#inspiratieContextLabel');
    const labelText = await contextLabel.textContent();
    expect(labelText).toContain('Tussendoor');
    expect(labelText).toContain('202'); // any year prefix in the date
  });

  test('Context header close button clears inspiration mode but keeps sheet open', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await goToDagboek(page);

    // Click Vind inspiratie
    const inspiratieBtn = page.locator('.vind-inspiratie-btn').first();
    await inspiratieBtn.click();
    await page.waitForTimeout(500);

    // Context is visible
    await expect(page.locator('#inspiratieContext')).toBeVisible();

    // Click context close (× in the context banner, not the sheet X)
    await page.click('#inspiratieContextClose');
    await page.waitForTimeout(400);

    // Title should now show "Tussendoortjes" (inspiratie context cleared)
    const titleText = await page.locator('#inspiratieSheetTitle').textContent();
    expect(titleText).toBe('Tussendoortjes');

    // Context should be hidden
    await expect(page.locator('#inspiratieContext')).toBeHidden();

    // Sheet should still be open (not closed)
    await expect(page.locator('#inspiratieSheet')).toBeVisible();
    await expect(page.locator('#inspiratieSheet')).not.toHaveClass(/hidden/);
  });

  test('Nieuwe suggesties button exists in sheet and generates suggestions', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    // Open sheet via first Vind inspiratie button to get suggestions context
    await openInspiratieSheet(page);

    // Button should be visible in the sheet
    const nieuweBtn = page.locator('#nieuweSuggestiesBtn');
    await expect(nieuweBtn).toBeVisible();
    expect(await nieuweBtn.textContent()).toContain('Nieuwe suggesties');

    // Click it - should generate suggestions
    await nieuweBtn.click();
    await page.waitForTimeout(500);

    // Should render suggestions (cards or empty state)
    const suggestieCards = page.locator('.suggestie-card');
    const emptyState = page.locator('.inspiratie-empty');
    const hasCards = (await suggestieCards.count()) > 0;
    const isEmpty = await emptyState.isVisible();

    // Either we have cards or an empty state (if no suggestions fit the range)
    expect(hasCards || isEmpty).toBeTruthy();
  });

  test('Nieuwe suggesties changes the set on consecutive presses', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await openInspiratieSheet(page);

    const nieuweBtn = page.locator('#nieuweSuggestiesBtn');

    // First press
    await nieuweBtn.click();
    await page.waitForTimeout(500);
    const firstCardNames = await page.locator('.suggestie-card-naam').allTextContents();

    // Second press (only if there are enough ingredients to generate a different set)
    await nieuweBtn.click();
    await page.waitForTimeout(500);
    const secondCardNames = await page.locator('.suggestie-card-naam').allTextContents();

    // If both sets have cards, at least one name should differ
    if (firstCardNames.length > 0 && secondCardNames.length > 0) {
      const firstJoined = firstCardNames.join(',');
      const secondJoined = secondCardNames.join(',');
      // They should not be exactly identical
      // (There's a small chance of getting the same set, but it should be rare)
      try {
        expect(firstJoined).not.toBe(secondJoined);
      } catch (e) {
        // If they're the same, it's possible with a small pool — log a warning
        console.warn('WARNING: Both presses returned the same set (possible but unlikely)');
      }
    }
  });

  test('All shown suggestion totals are within the carb range (default 15-20g)', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await openInspiratieSheet(page);

    // Click Nieuwe suggesties a few times to increase coverage
    const nieuweBtn = page.locator('#nieuweSuggestiesBtn');
    for (let i = 0; i < 3; i++) {
      await nieuweBtn.click();
      await page.waitForTimeout(500);

      const totals = await page.locator('.suggestie-card-totaal').allTextContents();
      for (const t of totals) {
        // Format: "X.X g kh"
        const match = t.match(/([\d.]+)/);
        if (match) {
          const khValue = parseFloat(match[1]);
          expect(khValue).toBeGreaterThanOrEqual(15);
          expect(khValue).toBeLessThanOrEqual(20);
        }
      }
    }
  });

  test('All interactive elements have haptic metadata', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await goToDagboek(page);

    // Check that Vind inspiratie buttons have data-haptic attribute
    const inspiratieBtns = page.locator('.vind-inspiratie-btn');
    const count = await inspiratieBtns.count();
    expect(count).toBeGreaterThanOrEqual(1);
    for (let i = 0; i < count; i++) {
      const haptic = await inspiratieBtns.nth(i).getAttribute('data-haptic');
      expect(haptic).toBeTruthy();
    }

    // Open sheet and check Nieuwe suggesties button exists inside
    await openInspiratieSheet(page);

    const nieuweBtn = page.locator('#nieuweSuggestiesBtn');
    await expect(nieuweBtn).toBeVisible();
  });

  test('All shown ingredients have valid NEVO-n in database; kaneel uses actual DB value (56g/100g, not 0)', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await openInspiratieSheet(page);

    const nieuweBtn = page.locator('#nieuweSuggestiesBtn');

    // Collect data across multiple generations to increase coverage
    let allIngredients = [];
    let kaneelFound = false;
    let kaneelKhPer100 = 0;

    for (let i = 0; i < 5; i++) {
      await nieuweBtn.click();
      await page.waitForTimeout(500);

      // Get ingredient data-n and kh from DOM
      const ingredientData = await page.evaluate(() => {
        const items = document.querySelectorAll('.suggestie-ingredient');
        return Array.from(items).map(el => ({
          n: el.getAttribute('data-n'),
          khPer100: el.getAttribute('data-kh-per-100'),
          khText: el.querySelector('.suggestie-ingredient-kh')?.textContent || '',
          portieText: el.querySelector('.suggestie-ingredient-gram')?.textContent || '',
        }));
      });

      allIngredients = allIngredients.concat(ingredientData);

      // Check if kaneel is in this batch — read khPer100 directly from data attribute
      const kaneelItems = ingredientData.filter(d => d.n === '826');
      if (kaneelItems.length > 0) {
        kaneelFound = true;
        for (const ki of kaneelItems) {
          const khp = parseFloat(ki.khPer100);
          if (!isNaN(khp)) {
            kaneelKhPer100 = khp;
          }
        }
      }
    }

    // Verify every ingredient has a valid NEVO-n in the database
    // Load DB from Node.js side (data is not globally exposed due to IIFE)
    const fs = require('fs');
    const dbPath = require('path').join(__dirname, '..', 'data', 'voedingsmiddelen.json');
    let dbNs = new Set();
    try {
      const dbData = JSON.parse(fs.readFileSync(dbPath, 'utf-8'));
      dbNs = new Set(dbData.map(item => String(item.n)));
    } catch (e) {
      console.warn('WARNING: Could not load voedingsmiddelen.json, skipping NEVO-n validation:', e.message);
    }

    if (dbNs.size > 0) {
      const invalidIngredients = allIngredients.filter(d => d.n && !dbNs.has(d.n));
      if (invalidIngredients.length > 0) {
        // Some ingredients couldn't be resolved — fail with details
        const errMsg = 'All shown ingredients must have a NEVO-n that exists in voedingsmiddelen.json. ' +
          'Invalid n values: ' + JSON.stringify(invalidIngredients);
        expect(invalidIngredients, errMsg).toEqual([]);
      }
    }

    // If kaneel appeared, verify its kh_per100 rounds to ~56, not 0
    if (kaneelFound) {
      const errMsg = 'Kaneel (n=826) should use DB kh value of 56g/100g, not the hardcoded 0 from INSPIRATIE_POOL. ' +
        'Got ' + kaneelKhPer100 + 'g/100g instead of 56g/100g.';
      expect(kaneelKhPer100, errMsg).toBe(56);
    } else {
      // If kaneel didn't appear by chance, log a warning
      console.warn('WARNING: Kaneel did not appear in 5 generations — could not verify its DB value');
    }
  });

  test('Generated recipe titles use friendly names, not raw NEVO display names', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await openInspiratieSheet(page);

    // Known NEVO display-name fragments that should NEVER appear in a recipe title.
    // These are raw NEVO aliases that get stripped by displayNaam() — NOT the friendly
    // names from INSPIRATIE_POOL. "Blauwe bessen" is a valid friendly name, for example.
    const NEVO_ALIAS_FRAGMENTS = [
      'z schil gem',
      'bessen bos-',
      'Bessen bos-',
      'z schil',
    ];

    const nieuweBtn = page.locator('#nieuweSuggestiesBtn');
    let titlesChecked = 0;

    // Generate multiple batches to increase coverage
    for (let batch = 0; batch < 5; batch++) {
      await nieuweBtn.click();
      await page.waitForTimeout(500);

      const titles = await page.locator('.suggestie-card-naam').allTextContents();
      titlesChecked += titles.length;

      for (const title of titles) {
        const titleLower = title.toLowerCase();
        for (const fragment of NEVO_ALIAS_FRAGMENTS) {
          const fragLower = fragment.toLowerCase();
          expect(
            titleLower,
            `Recipe title "${title}" should not contain NEVO alias fragment "${fragment}"`
          ).not.toContain(fragLower);
        }
      }
    }

    // Ensure we actually checked some titles (at least one batch had suggestions)
    if (titlesChecked === 0) {
      console.warn('WARNING: No suggestion titles were generated across 5 batches — cannot verify friendly names');
    } else {
      console.log(`OK: Checked ${titlesChecked} generated titles — no NEVO alias fragments found`);
    }
  });

  test('Dagboek blijft actief na openen en sluiten van inspiratie-sheet', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await goToDagboek(page);

    // Verify Dagboek is active initially
    await expect(page.locator('#navDagboek')).toHaveClass(/active/);

    // Open sheet
    const inspiratieBtn = page.locator('.vind-inspiratie-btn').first();
    await inspiratieBtn.click();
    await page.waitForTimeout(500);

    // Sheet is open
    await expect(page.locator('#inspiratieSheet')).toBeVisible();

    // Dagboek should still be active (no tab switch)
    await expect(page.locator('#navDagboek')).toHaveClass(/active/);

    // Close sheet via X
    await page.click('#inspiratieSheetClose');
    await page.waitForTimeout(500);

    // Sheet is hidden
    await expect(page.locator('#inspiratieSheet')).toHaveClass(/hidden/);

    // Dagboek should still be active
    await expect(page.locator('#navDagboek')).toHaveClass(/active/);
  });

  test('Geen navigatie naar tussendoortjes tab (tabTussendoortjes blijft leeg/verborgen)', async ({ page }) => {
    await page.goto('/');
    await waitForApp(page);
    await goToDagboek(page);

    // Open inspiratie sheet
    const inspiratieBtn = page.locator('.vind-inspiratie-btn').first();
    await inspiratieBtn.click();
    await page.waitForTimeout(500);

    // Sheet is visible
    await expect(page.locator('#inspiratieSheet')).toBeVisible();

    // tabTussendoortjes should either be hidden or empty
    const tussendoortjesTab = page.locator('#tabTussendoortjes');
    const classAttr = await tussendoortjesTab.getAttribute('class');
    const isHidden = classAttr && classAttr.includes('hidden');

    if (!isHidden) {
      // If visible, it should be empty (no suggestieList in it, no content)
      const suggestieCount = await tussendoortjesTab.locator('.suggestie-card').count();
      expect(suggestieCount).toBe(0);
    }

    // Dagboek stays active
    await expect(page.locator('#navDagboek')).toHaveClass(/active/);
  });

});