/**
 * AI Design Assistant routes
 * - POST /api/ai/design-tips    → contextual design advice
 * - POST /api/ai/recommend-materials → material/color recommendations
 * - POST /api/ai/render          → DALL-E 3 photorealistic render
 */
import { getDesignTip, recommendMaterials, generateRender } from '../services/designAdvisor.js';

/**
 * POST /api/ai/design-tips
 * Body: { config: { width, height, depth, columns, materialName, ... } }
 */
export async function designTipsRoute(req, res) {
  try {
    const { config } = req.body;
    if (!config) {
      return res.status(400).json({ error: 'Missing config in body' });
    }
    const result = await getDesignTip(config);
    res.json(result);
  } catch (err) {
    console.error('[AI design-tips]', err.message);
    if (err.message.includes('OPENAI_API_KEY')) {
      return res.status(503).json({ error: 'AI service not configured' });
    }
    res.status(500).json({ error: 'Failed to generate design tip' });
  }
}

/**
 * POST /api/ai/recommend-materials
 * Body: { config, finishes: [{ id, name, collection, price_chf? }], roomAnalysis?, priorities? }
 * priorities: { price: 1-5, quality: 1-5, durability: 1-5, aesthetics: 1-5 }
 */
export async function recommendMaterialsRoute(req, res) {
  try {
    const { config, finishes, roomAnalysis, priorities } = req.body;
    if (!config || !finishes) {
      return res.status(400).json({ error: 'Missing config or finishes in body' });
    }
    const result = await recommendMaterials(config, finishes, roomAnalysis, priorities);
    res.json(result);
  } catch (err) {
    console.error('[AI recommend-materials]', err.message);
    if (err.message.includes('OPENAI_API_KEY')) {
      return res.status(503).json({ error: 'AI service not configured' });
    }
    res.status(500).json({ error: 'Failed to generate recommendations' });
  }
}

/**
 * POST /api/ai/render
 * Body: { config, roomContext? }
 */
export async function renderRoute(req, res) {
  try {
    const { config, roomContext } = req.body;
    if (!config) {
      return res.status(400).json({ error: 'Missing config in body' });
    }
    const result = await generateRender(config, roomContext);
    res.json(result);
  } catch (err) {
    console.error('[AI render]', err.message);
    if (err.message.includes('OPENAI_API_KEY')) {
      return res.status(503).json({ error: 'AI service not configured' });
    }
    if (err.message.includes('billing') || err.message.includes('quota')) {
      return res.status(402).json({ error: 'AI quota exceeded' });
    }
    res.status(500).json({ error: 'Failed to generate render' });
  }
}