import { NextRequest, NextResponse } from "next/server";
import { getDb } from "@/lib/db";

export async function GET() {
  const sql = getDb();
  const rows = await sql(`
    SELECT p.*,
      COALESCE(bom.bom_count, 0) as bom_count,
      COALESCE(bom.total_cost, 0) as total_cost
    FROM products p
    LEFT JOIN (
      SELECT product_id,
        COUNT(*) as bom_count,
        SUM(bi.quantity * c.unit_price) as total_cost
      FROM bom_items bi
      JOIN components c ON bi.component_id = c.id
      GROUP BY product_id
    ) bom ON p.id = bom.product_id
    ORDER BY p.updated_at DESC
  `);
  return NextResponse.json(rows);
}

export async function POST(request: NextRequest) {
  const sql = getDb();
  const body = await request.json();
  const { name, sku, description, version, status } = body;

  const rows = await sql(
    `INSERT INTO products (name, sku, description, version, status)
     VALUES ($1, $2, $3, $4, $5)
     RETURNING *`,
    [name, sku, description || null, version || "1.0", status || "draft"]
  );

  return NextResponse.json(rows[0], { status: 201 });
}