var blake2b = require('blake2b')

if (new Uint16Array([1])[0] !== 1) throw new Error('Big endian architecture is not supported.')

module.exports.crypto_generichash_PRIMITIVE = 'blake2b'
module.exports.crypto_generichash_BYTES_MIN = blake2b.BYTES_MIN
module.exports.crypto_generichash_BYTES_MAX = blake2b.BYTES_MAX
module.exports.crypto_generichash_BYTES = blake2b.BYTES
module.exports.crypto_generichash_KEYBYTES_MIN = blake2b.KEYBYTES_MIN
module.exports.crypto_generichash_KEYBYTES_MAX = blake2b.KEYBYTES_MAX
module.exports.crypto_generichash_KEYBYTES = blake2b.KEYBYTES
module.exports.crypto_generichash_WASM_SUPPORTED = blake2b.WASM_SUPPORTED
module.exports.crypto_generichash_WASM_LOADED = false

module.exports.crypto_generichash = function (output, input, key) {
  blake2b(output.length, key).update(input).final(output)
}

module.exports.crypto_generichash_ready = blake2b.ready

module.exports.crypto_generichash_batch = function (output, inputArray, key) {
  var ctx = blake2b(output.length, key)
  for (var i = 0; i < inputArray.length; i++) {
    ctx.update(inputArray[i])
  }
  ctx.final(output)
}

module.exports.crypto_generichash_instance = function (key, outlen) {
  if (outlen == null) outlen = module.exports.crypto_generichash_BYTES
  return blake2b(outlen, key)
}

blake2b.ready(function (err) {
  module.exports.crypto_generichash_WASM_LOADED = blake2b.WASM_LOADED
})
