import multer from 'multer';
import path from 'path';
import fs from 'fs';

const uploadsBase = path.join(__dirname, '../../../uploads');

function storageFor(subdir: string) {
  return multer.diskStorage({
    destination: (_req, _file, cb) => {
      const dir = path.join(uploadsBase, subdir);
      fs.mkdirSync(dir, { recursive: true });
      cb(null, dir);
    },
    filename: (_req, file, cb) => {
      const unique = `${Date.now()}-${Math.round(Math.random() * 1e6)}`;
      cb(null, unique + path.extname(file.originalname));
    },
  });
}

const imageFilter: multer.Options['fileFilter'] = (_req, file, cb) => {
  const allowed = /jpeg|jpg|png|gif|webp/;
  cb(null, allowed.test(path.extname(file.originalname).toLowerCase()) && allowed.test(file.mimetype));
};

const pdfFilter: multer.Options['fileFilter'] = (_req, file, cb) => {
  cb(null, file.mimetype === 'application/pdf' || path.extname(file.originalname).toLowerCase() === '.pdf');
};

export const uploadHeadshot = multer({ storage: storageFor('headshots'), fileFilter: imageFilter, limits: { fileSize: 5 * 1024 * 1024 } });
export const uploadPhoto    = multer({ storage: storageFor('photos'),    fileFilter: imageFilter, limits: { fileSize: 10 * 1024 * 1024 } });
export const uploadLogo     = multer({ storage: storageFor('sponsors'),  fileFilter: imageFilter, limits: { fileSize: 5 * 1024 * 1024 } });
export const uploadMinutes  = multer({ storage: storageFor('minutes'),   fileFilter: pdfFilter,   limits: { fileSize: 20 * 1024 * 1024 } });