import { type NextRequest, NextResponse } from "next/server";
import { prisma } from "@/lib/prisma";
import { errorResponse, requireRole, ApiError } from "@/lib/api";
import { renderOperationCard, type OperationCardData } from "@/lib/pdf";

/**
 * Admin-only. Stream a one-page traveler card PDF for the given operation.
 * We respond with `Content-Disposition: inline` so hitting the link in a
 * new tab previews the PDF rather than forcing a download — makes the
 * "print for the shop floor" flow a single click.
 */
export async function GET(_req: NextRequest, ctx: { params: Promise<{ id: string }> }) {
  try {
    await requireRole("admin");
    const { id } = await ctx.params;

    const op = await prisma.operation.findUnique({
      where: { id },
      include: {
        machine: { select: { name: true, kind: true } },
        part: {
          select: {
            code: true,
            name: true,
            material: true,
            qty: true,
            assembly: {
              select: {
                code: true,
                name: true,
                qty: true,
                project: { select: { code: true, name: true } },
              },
            },
          },
        },
      },
    });
    if (!op) throw new ApiError(404, "not_found", "Operation not found");

    const data: OperationCardData = {
      project: op.part.assembly.project,
      assembly: {
        code: op.part.assembly.code,
        name: op.part.assembly.name,
        qty: op.part.assembly.qty,
      },
      part: {
        code: op.part.code,
        name: op.part.name,
        material: op.part.material,
        qty: op.part.qty,
      },
      operation: {
        id: op.id,
        sequence: op.sequence,
        name: op.name,
        qrToken: op.qrToken,
        machineName: op.machine?.name ?? null,
        machineKind: op.machine?.kind ?? null,
        settings: op.settings,
        materialNotes: op.materialNotes,
        instructions: op.instructions,
        qcRequired: op.qcRequired,
        plannedMinutes: op.plannedMinutes,
        plannedUnits: op.plannedUnits,
      },
    };

    const pdf = await renderOperationCard(data);
    const safeName = `${op.part.code}-op${op.sequence}.pdf`.replace(/[^A-Za-z0-9._-]/g, "_");

    return new NextResponse(pdf as unknown as BodyInit, {
      status: 200,
      headers: {
        "Content-Type": "application/pdf",
        "Content-Disposition": `inline; filename="${safeName}"`,
        "Cache-Control": "private, no-store",
      },
    });
  } catch (err) {
    return errorResponse(err);
  }
}