// server.js 2

const express = require('express');
const path = require('path');

const app = express();
// --- ИЗМЕНЕНИЕ: Используйте порт 3201, как в вашем конфиге прокси ---
const PORT = 3201;

app.use(express.json());

// Раздаем ТОЛЬКО нашу папку 'public'
app.use(express.static(path.join(__dirname, 'public')));

// --- УДАЛЕНО: Раздача папок build и jsm больше не нужна ---
// app.use('/build', express.static(path.join(__dirname, 'node_modules/three/build')));
// app.use('/jsm', express.static(path.join(__dirname, 'node_modules/three/examples/jsm')));


// API эндпоинт для расчета цены (без изменений)
const PRICE_CONFIG = {
    edgeBandingPerMeter: 50,
    baseWorkCost: 3000,
};
const MATERIALS_PRICES = {
    'Белый': 1500,
    'Серый': 1650,
    'Черный': 1800,
    'Образец1': 2200,
    'Образец2': 2500,
};
const PANEL_THICKNESS = 16;

app.post('/api/calculate-price', (req, res) => {
    const params = req.body;
    const pricePerM2 = MATERIALS_PRICES[params.materialName];
    if (!pricePerM2) {
        return res.status(400).json({ error: 'Invalid material name' });
    }
    const { width, height, depth, columns, rows } = params;
    const M_IN_MM = 1000;
    let totalAreaM2 = 0;
    let totalEdgeLengthM = 0;
    const innerWidth = width - 2 * PANEL_THICKNESS;
    const innerHeight = height - 2 * PANEL_THICKNESS;
    const shelfDepth = depth - PANEL_THICKNESS;
    totalAreaM2 += (2 * height * depth) / (M_IN_MM * M_IN_MM);
    totalAreaM2 += (2 * width * depth) / (M_IN_MM * M_IN_MM);
    totalEdgeLengthM += (2 * height + 2 * width) / M_IN_MM;
    totalAreaM2 += (innerWidth * innerHeight) / (M_IN_MM * M_IN_MM);
    const numDividers = columns - 1;
    if (numDividers > 0) {
        totalAreaM2 += (numDividers * innerHeight * shelfDepth) / (M_IN_MM * M_IN_MM);
        totalEdgeLengthM += (numDividers * innerHeight) / M_IN_MM;
    }
    const numShelves = rows - 1;
    if (numShelves > 0) {
        const sectionWidth = (innerWidth - (numDividers * PANEL_THICKNESS)) / columns;
        const totalShelfArea = (columns * numShelves * sectionWidth * shelfDepth) / (M_IN_MM * M_IN_MM);
        totalAreaM2 += totalShelfArea;
        const totalShelfEdgeLength = (columns * numShelves * sectionWidth) / M_IN_MM;
        totalEdgeLengthM += totalShelfEdgeLength;
    }
    const materialCost = totalAreaM2 * pricePerM2;
    const edgeBandingCost = totalEdgeLengthM * PRICE_CONFIG.edgeBandingPerMeter;
    const finalPrice = PRICE_CONFIG.baseWorkCost + materialCost + edgeBandingCost;
    res.json({ price: Math.round(finalPrice) });
});


app.listen(PORT, () => {
    console.log(`Сервер конструктора мебели запущен на порту: ${PORT}`);
});