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

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

    const rows = await sql(
      `SELECT poi.*,
         p.name AS product_name,
         p.sku AS product_sku,
         (poi.quantity * poi.unit_price) AS line_total,
         COALESCE(poi.shipped_quantity, 0) AS shipped_quantity,
         (poi.quantity - COALESCE(poi.shipped_quantity, 0)) AS remaining_quantity
       FROM purchase_order_items poi
       JOIN products p ON p.id = poi.product_id
       WHERE poi.purchase_order_id = $1
       ORDER BY poi.id ASC`,
      [Number(id)]
    );

    return NextResponse.json(rows);
  } catch (error) {
    console.error("[v0] PO items GET error:", error);
    return NextResponse.json(
      { error: error instanceof Error ? error.message : "Failed to fetch PO items" },
      { status: 500 }
    );
  }
}