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

export async function GET(
  _request: NextRequest,
  { params }: { params: Promise<{ productId: string }> }
) {
  const sql = getDb();
  const { productId } = await params;

  const rows = await sql(
    `SELECT bi.*,
      c.name as component_name,
      c.part_number,
      c.unit_price,
      c.stock_quantity,
      cat.name as category_name,
      (bi.quantity * c.unit_price) as line_cost
    FROM bom_items bi
    JOIN components c ON bi.component_id = c.id
    LEFT JOIN categories cat ON c.category_id = cat.id
    WHERE bi.product_id = $1
    ORDER BY bi.reference_designator ASC, c.name ASC`,
    [Number(productId)]
  );

  return NextResponse.json(rows);
}

export async function POST(
  request: NextRequest,
  { params }: { params: Promise<{ productId: string }> }
) {
  const sql = getDb();
  const { productId } = await params;
  const body = await request.json();
  const { component_id, quantity, reference_designator, notes } = body;

  const rows = await sql(
    `INSERT INTO bom_items (product_id, component_id, quantity, reference_designator, notes)
     VALUES ($1, $2, $3, $4, $5)
     RETURNING *`,
    [
      Number(productId),
      component_id,
      quantity || 1,
      reference_designator || null,
      notes || null,
    ]
  );

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