import { Router } from 'express';
import fs from 'fs';
import path from 'path';
import { requireAuth } from 'auth-connector/server/auth';
import { RJLog } from '../../library-ts/node/log/RJLog';
import { ROOT } from '../rootDir';

const router = Router();
router.use( requireAuth );

const LAYOUTS_DIR = path.join( ROOT, 'build', 'data', 'storage', 'layouts' );

function layoutFilePath( userId: string, deviceId: string ): string
{
  RJLog.log( { userId, deviceId } );
  const safe = ( s: string ) => s.replace( /[^a-zA-Z0-9_-]/g, '_' );
  const dir = path.join( LAYOUTS_DIR, safe( userId ) );
  if ( !fs.existsSync( dir ) ) fs.mkdirSync( dir, { recursive: true } );
  return path.join( dir, safe( deviceId ) + '.json' );
}

router.get( '/', ( req, res ) =>
{
  const deviceId = req.query.deviceId as string;
  if ( !deviceId ) { res.json( null ); return; }
  const fp = layoutFilePath( req.auth!.userId, deviceId );
  if ( !fs.existsSync( fp ) ) { res.json( null ); return; }
  try { res.json( JSON.parse( fs.readFileSync( fp, 'utf8' ) ) ); }
  catch { res.json( null ); }
} );

router.put( '/', ( req, res ) =>
{
  const deviceId = req.query.deviceId as string;
  if ( !deviceId ) { res.status( 400 ).json( { error: 'Missing deviceId' } ); return; }
  const fp = layoutFilePath( req.auth!.userId, deviceId );
  try
  {
    fs.writeFileSync( fp, JSON.stringify( req.body ), 'utf8' );
    res.json( { ok: true } );
  }
  catch ( e ) { res.status( 500 ).json( { error: String( e ) } ); }
} );

export default router;