/**
 * Modul: Meal-Fit-Test
 * Zweck: Validiert deterministic context-aware meal suggestions and grocery dedupe.
 * Ausführen: node test-meal-fit.js
 */

import { generateGroceryList, normalizeIngredientName, scoreMealSuggestions } from './server/services/meal-fit.js';

let passed = 0;
let failed = 0;

function test(name, fn) {
  try { fn(); console.log(`  ✓ ${name}`); passed++; }
  catch (err) { console.error(`  ✗ ${name}: ${err.message}`); failed++; }
}
function assert(cond, msg) { if (!cond) throw new Error(msg || 'Assertion fehlgeschlagen'); }
function topName(result) { return result[0]?.mealName; }

const meals = [
  {
    id: 'wraps',
    name: 'Chicken wraps',
    ingredients: ['tortilla wraps', 'leftover chicken', 'cucumber', 'cheddar cheese'],
    activeMinutes: 12,
    totalMinutes: 15,
    effort: 'easy',
    cleanup: 'low',
    interruptionTolerance: 'high',
    kidFit: 'safe',
    meal_category: 'chicken',
    style: 'quick',
    tags: ['portable'],
  },
  {
    id: 'lasagna',
    name: 'Sunday lasagna',
    ingredients: ['beef mince', 'tomatoes', 'pasta sheets', 'cheddar cheese'],
    activeMinutes: 50,
    totalMinutes: 110,
    effort: 'project',
    cleanup: 'high',
    interruptionTolerance: 'low',
    kidFit: 'safe',
    guestFit: true,
    batchFriendly: true,
    meal_category: 'pasta',
    tags: ['oven', 'cozy'],
  },
  {
    id: 'fish',
    name: 'Fish curry',
    ingredients: ['fish', 'rice', 'curry paste', 'coconut milk'],
    activeMinutes: 35,
    totalMinutes: 40,
    effort: 'normal',
    cleanup: 'medium',
    interruptionTolerance: 'low',
    kidFit: 'risky',
    meal_category: 'fish',
    style: 'family',
  },
  {
    id: 'pancakes',
    name: 'Pancakes',
    ingredients: ['flour', 'milk', 'eggs'],
    activeMinutes: 25,
    totalMinutes: 30,
    effort: 'easy',
    cleanup: 'medium',
    interruptionTolerance: 'medium',
    kidFit: 'safe',
    meal_category: 'breakfast',
  },
];

console.log('\n[Meal-Fit-Test] Context-aware dinner planner\n');

test('ingredient normalization dedupes obvious variants', () => {
  assert(normalizeIngredientName('Grated cheddar') === 'cheddar');
  assert(normalizeIngredientName('cheddar cheese') === 'cheddar');
  assert(normalizeIngredientName('Tortilla wraps') === 'tortillas');
});

test('busy low-energy day promotes quick low-cleanup interruption-friendly leftover meal', () => {
  const suggestions = scoreMealSuggestions({
    meals,
    dayContext: { busyness: 'high', energy: 'low', dinnerWindowMinutes: 25, labels: ['late_activity'] },
    inventory: [{ name: 'leftover chicken', portions: 2, expiresOn: '2026-05-24' }],
    today: '2026-05-23',
  });
  assert(topName(suggestions) === 'Chicken wraps', `Expected Chicken wraps, got ${topName(suggestions)}`);
  const top = suggestions[0];
  assert(top.fitLabels.includes('quick-active-time'));
  assert(top.fitLabels.includes('low-cleanup'));
  assert(top.fitLabels.includes('uses-inventory'));
  assert(top.reasons.some((reason) => reason.includes('tight day') || reason.includes('Low-energy')));
});

test('normal guest day promotes guest-capable batch meal over emergency wrap default', () => {
  const suggestions = scoreMealSuggestions({
    meals,
    dayContext: { busyness: 'low', energy: 'high', guests: true, dinnerWindowMinutes: 150 },
    pantryStaples: ['pasta sheets'],
  });
  assert(topName(suggestions) === 'Sunday lasagna', `Expected Sunday lasagna, got ${topName(suggestions)}`);
  assert(suggestions[0].fitLabels.includes('guest-capable'));
});

test('allergy blocks instead of merely warning', () => {
  const suggestions = scoreMealSuggestions({
    meals,
    preferences: [{ type: 'allergy', target: 'fish', strength: 'high' }],
  });
  const fish = suggestions.find((suggestion) => suggestion.mealId === 'fish');
  assert(fish.score < -1000);
  assert(fish.warnings.some((warning) => warning.includes('allergy')));
});

test('dislike and recent repetition demote risky meals with grounded warnings', () => {
  const suggestions = scoreMealSuggestions({
    meals,
    preferences: [{ type: 'dislike', target: 'fish', strength: 'high' }],
    recentMeals: [{ title: 'Fish curry', meal_category: 'fish' }],
  });
  const fish = suggestions.find((suggestion) => suggestion.mealId === 'fish');
  assert(fish.warnings.some((warning) => warning.includes('disliked')));
  assert(fish.warnings.some((warning) => warning.includes('Recently eaten')));
  assert(suggestions.indexOf(fish) > 0, 'Fish should not rank first after dislike + repetition');
});

test('inventory matching is concrete, not broad tag magic', () => {
  const suggestions = scoreMealSuggestions({
    meals: [{ id: 'taggy', name: 'Mystery pasta', ingredients: ['tomatoes'], meal_category: 'pasta', tags: ['pasta'] }],
    inventory: [{ name: 'pasta', expiresOn: '2026-05-24' }],
    today: '2026-05-23',
  });
  assert(!suggestions[0].fitLabels.includes('uses-inventory'), 'Broad pasta tag must not count as concrete inventory use');
  assert(!suggestions[0].reasons.some((reason) => reason.includes('Uses pasta')));
});

test('grocery list dedupes normalized ingredient names and tracks source meals', () => {
  const grocery = generateGroceryList([
    meals[0],
    { id: 'quesadillas', name: 'Quesadillas', ingredients: ['tortillas', 'grated cheddar', 'pepper'] },
  ], { inventory: [{ name: 'leftover chicken' }], pantryStaples: ['pepper'] });
  const names = grocery.items.map((item) => item.name);
  assert(names.filter((name) => name === 'cheddar').length === 1, `Expected one cheddar, got ${names.join(', ')}`);
  assert(names.filter((name) => name === 'tortillas').length === 1, `Expected one tortillas, got ${names.join(', ')}`);
  const cheddar = grocery.items.find((item) => item.name === 'cheddar');
  assert(cheddar.sourceMeals.length === 2, 'Cheddar should link both source meals');
  assert(grocery.coveredByInventory.some((item) => item.name === 'chicken'), 'Leftover chicken should be inventory-covered');
});

console.log(`\n[Meal-Fit-Test] Ergebnis: ${passed} bestanden, ${failed} fehlgeschlagen\n`);
if (failed > 0) process.exit(1);