import { describe, it, expect } from 'vitest';
import { openInMemoryForTest } from '../../src/lib/server/db';
import { insertRecipe } from '../../src/lib/server/recipes/repository';
import {
  addRecipeToCart,
  removeRecipeFromCart,
  listShoppingList
} from '../../src/lib/server/shopping/repository';
import type { Recipe } from '../../src/lib/types';

function recipe(overrides: Partial<Recipe> = {}): Recipe {
  return {
    id: null,
    title: 'Test',
    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: [],
    ...overrides
  };
}

describe('addRecipeToCart', () => {
  it('inserts recipe with default servings from recipe.servings_default', () => {
    const db = openInMemoryForTest();
    const id = insertRecipe(db, recipe({ title: 'Pasta', servings_default: 4 }));
    addRecipeToCart(db, id, null);
    const snap = listShoppingList(db);
    expect(snap.recipes).toHaveLength(1);
    expect(snap.recipes[0].servings).toBe(4);
  });

  it('respects explicit servings override', () => {
    const db = openInMemoryForTest();
    const id = insertRecipe(db, recipe({ servings_default: 4 }));
    addRecipeToCart(db, id, null, 2);
    expect(listShoppingList(db).recipes[0].servings).toBe(2);
  });

  it('is idempotent: second insert updates servings, not fails', () => {
    const db = openInMemoryForTest();
    const id = insertRecipe(db, recipe({ servings_default: 4 }));
    addRecipeToCart(db, id, null, 2);
    addRecipeToCart(db, id, null, 6);
    const snap = listShoppingList(db);
    expect(snap.recipes).toHaveLength(1);
    expect(snap.recipes[0].servings).toBe(6);
  });

  it('falls back to servings=4 when recipe has no default', () => {
    const db = openInMemoryForTest();
    const id = insertRecipe(db, recipe({ servings_default: null }));
    addRecipeToCart(db, id, null);
    expect(listShoppingList(db).recipes[0].servings).toBe(4);
  });
});

describe('removeRecipeFromCart', () => {
  it('deletes only the given recipe', () => {
    const db = openInMemoryForTest();
    const a = insertRecipe(db, recipe({ title: 'A' }));
    const b = insertRecipe(db, recipe({ title: 'B' }));
    addRecipeToCart(db, a, null);
    addRecipeToCart(db, b, null);
    removeRecipeFromCart(db, a);
    const snap = listShoppingList(db);
    expect(snap.recipes).toHaveLength(1);
    expect(snap.recipes[0].recipe_id).toBe(b);
  });

  it('is idempotent when recipe is not in cart', () => {
    const db = openInMemoryForTest();
    const id = insertRecipe(db, recipe());
    expect(() => removeRecipeFromCart(db, id)).not.toThrow();
  });
});