import { describe, it, expect } from 'vitest';
import {
  RECIPE_EXTRACTION_SYSTEM_PROMPT,
  GEMINI_RESPONSE_SCHEMA,
  extractionResponseSchema,
  type ExtractionResponse
} from '../../src/lib/server/ai/recipe-extraction-prompt';

describe('recipe-extraction-prompt', () => {
  it('system prompt is in German and mentions Rezept + Zutaten + Zubereitung', () => {
    const p = RECIPE_EXTRACTION_SYSTEM_PROMPT.toLowerCase();
    expect(p).toContain('rezept');
    expect(p).toContain('zutaten');
    expect(p).toContain('zubereitung');
  });

  it('Gemini response schema has required top-level keys', () => {
    expect(GEMINI_RESPONSE_SCHEMA.type).toBeDefined();
    expect(Object.keys(GEMINI_RESPONSE_SCHEMA.properties)).toEqual(
      expect.arrayContaining(['title', 'ingredients', 'steps'])
    );
  });

  it('Zod validator accepts a well-formed response', () => {
    const good: ExtractionResponse = {
      title: 'Testrezept',
      servings_default: 4,
      servings_unit: 'Portionen',
      prep_time_min: 15,
      cook_time_min: 30,
      total_time_min: null,
      ingredients: [{ quantity: 100, unit: 'g', name: 'Mehl', note: null }],
      steps: [{ text: 'Mehl in eine Schüssel geben.' }]
    };
    expect(() => extractionResponseSchema.parse(good)).not.toThrow();
  });

  it('Zod validator rejects missing title', () => {
    const bad = { servings_default: 4, ingredients: [], steps: [] };
    expect(() => extractionResponseSchema.parse(bad)).toThrow();
  });

  it('Zod validator accepts quantity=null and unit=null', () => {
    const ok: ExtractionResponse = {
      title: 'Prise-Rezept',
      servings_default: null,
      servings_unit: null,
      prep_time_min: null,
      cook_time_min: null,
      total_time_min: null,
      ingredients: [{ quantity: null, unit: null, name: 'Salz', note: 'nach Geschmack' }],
      steps: [{ text: 'Einfach so.' }]
    };
    expect(() => extractionResponseSchema.parse(ok)).not.toThrow();
  });

  it('Zod validator rejects unexpected extra top-level keys (strict)', () => {
    const bad = {
      title: 'x',
      servings_default: null,
      servings_unit: null,
      prep_time_min: null,
      cook_time_min: null,
      total_time_min: null,
      ingredients: [],
      steps: [],
      malicious_extra_field: 'pwned'
    };
    expect(() => extractionResponseSchema.parse(bad)).toThrow();
  });
});