/**
 * Modul: Meal-Planning-Test
 * Zweck: Validiert native Meal-Planning-Signal-Tabellen und Constraints.
 * Ausführen: node --experimental-sqlite test-meal-planning.js
 */

import { DatabaseSync } from 'node:sqlite';
import fs from 'node:fs';

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 migrationSql(version) {
  const source = fs.readFileSync(new URL('./server/db.js', import.meta.url), 'utf8');
  const re = new RegExp('version:\\s*' + version + ',[\\s\\S]*?up:\\s*`([\\s\\S]*?)`');
  const match = source.match(re);
  if (!match) throw new Error(`Migration v${version} nicht gefunden`);
  return match[1];
}

const db = new DatabaseSync(':memory:');
db.exec('PRAGMA foreign_keys = ON;');
db.exec(`
  CREATE TABLE users (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    display_name TEXT NOT NULL,
    avatar_color TEXT
  );
  CREATE TABLE recipes (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    title TEXT NOT NULL
  );
  CREATE TABLE meals (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    date TEXT NOT NULL,
    meal_type TEXT NOT NULL CHECK(meal_type IN ('breakfast', 'lunch', 'dinner', 'snack')),
    title TEXT NOT NULL
  );
`);
db.exec(migrationSql(39));

console.log('\n[Meal-Planning-Test] Native Signaltabellen\n');

const tables = [
  'meal_cooking_rules',
  'recipe_family_preferences',
  'recipe_variation_meta',
  'planned_meal_cooks',
  'meal_plan_feedback',
  'kids_cookbooks',
];

for (const table of tables) {
  test(`Tabelle "${table}" existiert`, () => {
    const row = db.prepare("SELECT name FROM sqlite_master WHERE type='table' AND name=?").get(table);
    assert(row, `Tabelle ${table} fehlt`);
  });
}

let userId, recipeId, mealId;

test('Fixture-Daten erstellen', () => {
  userId = db.prepare("INSERT INTO users (display_name, avatar_color) VALUES ('Liv', '#FF6B9D')").run().lastInsertRowid;
  recipeId = db.prepare("INSERT INTO recipes (title) VALUES ('Pasta med tomat')").run().lastInsertRowid;
  mealId = db.prepare("INSERT INTO meals (date, meal_type, title) VALUES ('2026-05-12', 'dinner', 'Pasta med tomat')").run().lastInsertRowid;
  assert(userId > 0 && recipeId > 0 && mealId > 0);
});

test('Recurring cook rule gemmes', () => {
  db.prepare('INSERT INTO meal_cooking_rules (user_id, weekday, meal_type, priority) VALUES (?, 0, ?, 100)').run(userId, 'dinner');
  const row = db.prepare('SELECT * FROM meal_cooking_rules WHERE user_id = ?').get(userId);
  assert(row.weekday === 0 && row.meal_type === 'dinner');
});

test('Recipe preference/capability-signaler gemmes', () => {
  db.prepare(`
    INSERT INTO recipe_family_preferences (
      recipe_id, user_id, preference, can_cook, can_help_cook, will_eat_modified, adult_only, swap_in_count, swap_away_count
    ) VALUES (?, ?, 'favorite', 1, 1, 1, 0, 2, 1)
  `).run(recipeId, userId);
  const row = db.prepare('SELECT * FROM recipe_family_preferences WHERE recipe_id = ? AND user_id = ?').get(recipeId, userId);
  assert(row.preference === 'favorite');
  assert(row.can_cook === 1 && row.can_help_cook === 1 && row.will_eat_modified === 1 && row.adult_only === 0);
  assert(row.swap_in_count === 2 && row.swap_away_count === 1);
});

test('Variation metadata gemmes', () => {
  db.prepare('INSERT INTO recipe_variation_meta (recipe_id, protein, style, kid_suitable_confidence) VALUES (?, ?, ?, 85)')
    .run(recipeId, 'vegetarian', 'quick');
  const row = db.prepare('SELECT * FROM recipe_variation_meta WHERE recipe_id = ?').get(recipeId);
  assert(row.protein === 'vegetarian' && row.style === 'quick' && row.kid_suitable_confidence === 85);
});

test('Planned meal cook assignment gemmes', () => {
  db.prepare('INSERT INTO planned_meal_cooks (meal_id, user_id, planned_for_date, meal_type, source_plan_id) VALUES (?, ?, ?, ?, ?)')
    .run(mealId, userId, '2026-05-12', 'dinner', 'plan-test');
  const row = db.prepare('SELECT * FROM planned_meal_cooks WHERE meal_id = ?').get(mealId);
  assert(row.user_id === userId && row.source_plan_id === 'plan-test');
});

test('Feedback event gemmes', () => {
  const id = db.prepare(`
    INSERT INTO meal_plan_feedback (plan_id, meal_id, recipe_id, slot_date, meal_type, action, original_title, final_title, user_id)
    VALUES ('plan-test', ?, ?, '2026-05-12', 'dinner', 'accept', 'Pasta', 'Pasta med tomat', ?)
  `).run(mealId, recipeId, userId).lastInsertRowid;
  const row = db.prepare('SELECT * FROM meal_plan_feedback WHERE id = ?').get(id);
  assert(row.action === 'accept' && row.recipe_id === recipeId);
});

test('Kids cookbook gemmes som JSON', () => {
  const content = JSON.stringify({ title: 'Pasta for børn', steps: ['Vask hænder', 'Rør sovs'] });
  const id = db.prepare('INSERT INTO kids_cookbooks (recipe_id, title, content_json, created_by) VALUES (?, ?, ?, ?)')
    .run(recipeId, 'Pasta for børn', content, userId).lastInsertRowid;
  const row = db.prepare('SELECT * FROM kids_cookbooks WHERE id = ?').get(id);
  assert(JSON.parse(row.content_json).steps.length === 2);
});

test('Ugyldig preference afvises', () => {
  let failedConstraint = false;
  try {
    db.prepare('INSERT INTO recipe_family_preferences (recipe_id, user_id, preference) VALUES (?, ?, ?)').run(recipeId, userId + 1, 'maybe');
  } catch { failedConstraint = true; }
  assert(failedConstraint, 'CHECK constraint skulle afvise ugyldig preference');
});

test('FK cascade sletter recipe-signaler', () => {
  db.prepare('DELETE FROM recipes WHERE id = ?').run(recipeId);
  const prefs = db.prepare('SELECT count(*) AS n FROM recipe_family_preferences WHERE recipe_id = ?').get(recipeId).n;
  const meta = db.prepare('SELECT count(*) AS n FROM recipe_variation_meta WHERE recipe_id = ?').get(recipeId).n;
  assert(prefs === 0 && meta === 0);
});

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