import { NextResponse } from 'next/server';
import { revalidatePath } from 'next/cache';
import { setSection, resetSection, getSection } from '@/lib/db/store';
import { isEditableKey } from '@/lib/content/sections';

export const runtime = 'nodejs';

// GET ?key=hero -> current stored override (or null)
export async function GET(req: Request) {
  const key = new URL(req.url).searchParams.get('key') ?? '';
  if (!isEditableKey(key)) {
    return NextResponse.json({ error: 'unknown section' }, { status: 400 });
  }
  return NextResponse.json({ key, override: getSection(key) });
}

// POST { key, data: { fa, en } } -> save override
export async function POST(req: Request) {
  let body: { key?: string; data?: { fa?: unknown; en?: unknown } };
  try {
    body = await req.json();
  } catch {
    return NextResponse.json({ error: 'bad json' }, { status: 400 });
  }

  const key = body.key ?? '';
  if (!isEditableKey(key)) {
    return NextResponse.json({ error: 'unknown section' }, { status: 400 });
  }
  if (!body.data || typeof body.data !== 'object' || !('fa' in body.data) || !('en' in body.data)) {
    return NextResponse.json({ error: 'expected { fa, en } payload' }, { status: 400 });
  }

  setSection(key, { fa: body.data.fa, en: body.data.en });
  // (site) layout is force-dynamic, but revalidate keeps any cached routes fresh.
  revalidatePath('/', 'layout');
  return NextResponse.json({ ok: true });
}

// DELETE ?key=hero -> revert to in-code default
export async function DELETE(req: Request) {
  const key = new URL(req.url).searchParams.get('key') ?? '';
  if (!isEditableKey(key)) {
    return NextResponse.json({ error: 'unknown section' }, { status: 400 });
  }
  resetSection(key);
  revalidatePath('/', 'layout');
  return NextResponse.json({ ok: true });
}