import { NextRequest, NextResponse } from "next/server";
import { prisma } from "@/lib/prisma";
import { requireSessionAuth } from "@/lib/auth";

export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> },
) {
  const isAdminRequest = request.headers.get("x-admin-request") === "true";
  if (!isAdminRequest) return NextResponse.json({ error: "Admin access required" }, { status: 403 });
  const authError = requireSessionAuth(request);
  if (authError) return authError;

  const { id: idParam } = await params;
  const id = parseInt(idParam, 10);
  if (!Number.isFinite(id)) return NextResponse.json({ error: "Invalid project id" }, { status: 400 });

  const { searchParams } = new URL(request.url);
  const locale = searchParams.get("locale") || "en";

  const translation = await prisma.projectTranslation.findFirst({
    where: { projectId: id, locale },
  });

  return NextResponse.json({ translation });
}

export async function PUT(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> },
) {
  const isAdminRequest = request.headers.get("x-admin-request") === "true";
  if (!isAdminRequest) return NextResponse.json({ error: "Admin access required" }, { status: 403 });
  const authError = requireSessionAuth(request);
  if (authError) return authError;

  const { id: idParam } = await params;
  const id = parseInt(idParam, 10);
  if (!Number.isFinite(id)) return NextResponse.json({ error: "Invalid project id" }, { status: 400 });

  const body = (await request.json()) as {
    locale?: string;
    title?: string;
    description?: string;
  };

  const locale = body.locale || "en";
  const title = body.title?.trim();
  const description = body.description?.trim();

  if (!title || !description) {
    return NextResponse.json({ error: "title and description are required" }, { status: 400 });
  }

  const saved = await prisma.projectTranslation.upsert({
    where: { projectId_locale: { projectId: id, locale } },
    create: {
      projectId: id,
      locale,
      title,
      description,
    },
    update: {
      title,
      description,
    },
  });

  return NextResponse.json({ translation: saved });
}