import { describe, it, expect, beforeEach } from 'vitest';
import type Database from 'better-sqlite3';
import { openInMemoryForTest } from '../../src/lib/server/db';
import { createProfile } from '../../src/lib/server/profiles/repository';
import { insertRecipe } from '../../src/lib/server/recipes/repository';
import {
  addToWishlist,
  removeFromWishlist,
  removeFromWishlistForAll,
  listWishlist,
  listWishlistProfileIds,
  isOnMyWishlist,
  countWishlistRecipes
} from '../../src/lib/server/wishlist/repository';
import type { Recipe } from '../../src/lib/types';

const recipe = (title: string, id?: null): Recipe => ({
  id: id ?? null,
  title,
  description: null,
  source_url: null,
  source_domain: null,
  image_path: null,
  servings_default: 4,
  servings_unit: null,
  prep_time_min: null,
  cook_time_min: null,
  total_time_min: null,
  cuisine: null,
  category: null,
  ingredients: [],
  steps: [],
  tags: []
});

let db: Database.Database;

beforeEach(() => {
  db = openInMemoryForTest();
});

describe('per-user wishlist', () => {
  it('adds and lists for a single profile', () => {
    const r1 = insertRecipe(db, recipe('Carbonara'));
    const p = createProfile(db, 'Hendrik');
    addToWishlist(db, r1, p.id);
    expect(isOnMyWishlist(db, r1, p.id)).toBe(true);

    const list = listWishlist(db, p.id);
    expect(list.length).toBe(1);
    expect(list[0].title).toBe('Carbonara');
    expect(list[0].wanted_by_count).toBe(1);
    expect(list[0].wanted_by_names).toBe('Hendrik');
    expect(list[0].on_my_wishlist).toBe(1);
  });

  it('aggregates multiple users per recipe', () => {
    const r1 = insertRecipe(db, recipe('Pizza'));
    const a = createProfile(db, 'Alice');
    const b = createProfile(db, 'Bob');
    const c = createProfile(db, 'Cara');
    addToWishlist(db, r1, a.id);
    addToWishlist(db, r1, b.id);
    addToWishlist(db, r1, c.id);

    const listFromA = listWishlist(db, a.id);
    expect(listFromA.length).toBe(1);
    expect(listFromA[0].wanted_by_count).toBe(3);
    expect(listFromA[0].on_my_wishlist).toBe(1);

    const ids = listWishlistProfileIds(db, r1);
    expect(ids.sort()).toEqual([a.id, b.id, c.id].sort());
  });

  it('is idempotent on double-add for same profile', () => {
    const r1 = insertRecipe(db, recipe('Pizza'));
    const p = createProfile(db, 'A');
    addToWishlist(db, r1, p.id);
    addToWishlist(db, r1, p.id);
    const list = listWishlist(db, p.id);
    expect(list[0].wanted_by_count).toBe(1);
  });

  it('removes only my entry, keeps others', () => {
    const r1 = insertRecipe(db, recipe('Salad'));
    const a = createProfile(db, 'A');
    const b = createProfile(db, 'B');
    addToWishlist(db, r1, a.id);
    addToWishlist(db, r1, b.id);
    removeFromWishlist(db, r1, a.id);
    expect(isOnMyWishlist(db, r1, a.id)).toBe(false);
    expect(isOnMyWishlist(db, r1, b.id)).toBe(true);
    expect(listWishlist(db, b.id)[0].wanted_by_count).toBe(1);
  });

  it('on_my_wishlist is 0 for profiles that did not wish', () => {
    const r1 = insertRecipe(db, recipe('Curry'));
    const a = createProfile(db, 'A');
    const b = createProfile(db, 'B');
    addToWishlist(db, r1, a.id);

    const listFromB = listWishlist(db, b.id);
    expect(listFromB[0].on_my_wishlist).toBe(0);
    expect(listFromB[0].wanted_by_count).toBe(1);
  });

  it('cascades when recipe is deleted', () => {
    const r1 = insertRecipe(db, recipe('X'));
    const a = createProfile(db, 'A');
    addToWishlist(db, r1, a.id);
    db.prepare('DELETE FROM recipe WHERE id = ?').run(r1);
    expect(listWishlist(db, a.id).length).toBe(0);
  });

  it('cascades when profile is deleted', () => {
    const r1 = insertRecipe(db, recipe('X'));
    const a = createProfile(db, 'A');
    addToWishlist(db, r1, a.id);
    db.prepare('DELETE FROM profile WHERE id = ?').run(a.id);
    expect(listWishlist(db, null).length).toBe(0);
  });

  it('countWishlistRecipes counts distinct recipes (not rows)', () => {
    const r1 = insertRecipe(db, recipe('R1'));
    const r2 = insertRecipe(db, recipe('R2'));
    const a = createProfile(db, 'A');
    const b = createProfile(db, 'B');
    addToWishlist(db, r1, a.id);
    addToWishlist(db, r1, b.id); // same recipe, different user
    addToWishlist(db, r2, a.id);
    expect(countWishlistRecipes(db)).toBe(2);
  });

  it('removeFromWishlistForAll drops every profile', () => {
    const r1 = insertRecipe(db, recipe('R1'));
    const a = createProfile(db, 'A');
    const b = createProfile(db, 'B');
    addToWishlist(db, r1, a.id);
    addToWishlist(db, r1, b.id);
    removeFromWishlistForAll(db, r1);
    expect(listWishlistProfileIds(db, r1)).toEqual([]);
  });
});