import { describe, expect, it } from 'vitest';
import { DEMO_TEMPLATE_300x250 } from '@banner-studio/layout-engine';
import { routeNode } from '../src/ai-orchestration/route-node.js';
import { assemble } from '../src/ai-orchestration/assemble.js';

describe('assemble', () => {
  it('stamps version_id, generated_at, ai_reasoning, click_destinations and copy map', () => {
    const routed = routeNode({
      template: DEMO_TEMPLATE_300x250,
      hero_image_url: 'https://cdn.example/hero.jpg'
    });

    const { spec, copyMap } = assemble({
      routed,
      copy: {
        headline: 'Test Headline',
        subheadline: 'Test sub.',
        cta_text: 'Shop now'
      },
      rationale: {
        copy: 'tight benefit-led wording',
        asset: 'product hero with neutral background',
        variant: 'standard 300x250 variant',
        animation: 'fade-in cascade'
      },
      campaign_id: 'camp-123',
      click_url: 'https://example.com/landing'
    });

    expect(spec.campaign_id).toBe('camp-123');
    expect(spec.version_id).toMatch(/^[-0-9a-f]{8,}/);
    expect(new Date(spec.generated_at).getTime()).not.toBeNaN();

    expect(spec.ai_reasoning.copy_rationale).toBe('tight benefit-led wording');
    expect(spec.ai_reasoning.asset_selection).toBe('product hero with neutral background');
    expect(spec.ai_reasoning.variant_selection).toBe('standard 300x250 variant');
    expect(spec.ai_reasoning.animation_rationale).toBe('fade-in cascade');

    expect(spec.click_destinations).toEqual([
      { id: 'cta', url: 'https://example.com/landing' }
    ]);

    expect(copyMap).toEqual({
      headline: 'Test Headline',
      subheadline: 'Test sub.',
      cta: 'Shop now'
    });
  });

  it('omits subheadline and legal from the copy map when not provided', () => {
    const routed = routeNode({
      template: DEMO_TEMPLATE_300x250,
      hero_image_url: 'https://cdn.example/hero.jpg'
    });

    const { copyMap } = assemble({
      routed,
      copy: {
        headline: 'Just headline and CTA',
        cta_text: 'Shop'
      },
      rationale: { copy: '', asset: '', variant: '', animation: '' },
      campaign_id: 'camp',
      click_url: 'https://example.com'
    });

    expect(copyMap).toEqual({
      headline: 'Just headline and CTA',
      cta: 'Shop'
    });
    expect(copyMap.subheadline).toBeUndefined();
    expect(copyMap.legal).toBeUndefined();
  });
});