import { extname } from 'path'
import sharp from 'sharp'
import { getErrorMessage } from './guards'

interface TextureCompressionResult {
  buffer: Buffer
  compressed: boolean
  error?: string
}

export async function compressTextureBuffer(
  filename: string,
  buffer: Buffer,
): Promise<TextureCompressionResult> {
  const ext = extname(filename).toLowerCase()

  try {
    if (ext === '.jpg' || ext === '.jpeg') {
      return {
        buffer: await sharp(buffer).jpeg({ quality: 82, mozjpeg: true }).toBuffer(),
        compressed: true,
      }
    }

    if (ext === '.png') {
      return {
        buffer: await sharp(buffer).png({ compressionLevel: 9, adaptiveFiltering: true }).toBuffer(),
        compressed: true,
      }
    }

    if (ext === '.webp') {
      return {
        buffer: await sharp(buffer).webp({ quality: 82 }).toBuffer(),
        compressed: true,
      }
    }
  } catch (err) {
    const message = getErrorMessage(err, String(err))
    return {
      buffer,
      compressed: false,
      error: `Compression texture echouee pour ${filename}: ${message}`,
    }
  }

  return { buffer, compressed: false }
}