import path from 'path';
import fs from 'fs';
import sharp from 'sharp';

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

export function ensureUploadDirs() {
  const dirs = [
    UPLOAD_DIR,
    path.join(UPLOAD_DIR, 'userpics'),
    path.join(UPLOAD_DIR, 'thumbs'),
    path.join(UPLOAD_DIR, 'normal')
  ];
  for (const dir of dirs) {
    if (!fs.existsSync(dir)) {
      fs.mkdirSync(dir, { recursive: true });
    }
  }
}

export async function processUploadedImage(filePath: string, filename: string) {
  ensureUploadDirs();

  const userpicsPath = path.join(UPLOAD_DIR, 'userpics', filename);
  const thumbsPath = path.join(UPLOAD_DIR, 'thumbs', filename);
  const normalPath = path.join(UPLOAD_DIR, 'normal', filename);

  fs.copyFileSync(filePath, userpicsPath);

  const image = sharp(userpicsPath);
  const metadata = await image.metadata();
  const pwidth = metadata.width || 0;
  const pheight = metadata.height || 0;
  const stats = fs.statSync(userpicsPath);
  const filesize = stats.size;

  await sharp(userpicsPath)
    .resize(200, 200, { fit: 'inside', withoutEnlargement: true })
    .toFile(thumbsPath);

  await sharp(userpicsPath)
    .resize(800, 800, { fit: 'inside', withoutEnlargement: true })
    .toFile(normalPath);

  return {
    filepath: 'userpics/',
    filename,
    filesize,
    pwidth,
    pheight
  };
}