import type { EncryptionKeypair } from '../../domain/keypair.js'
import type { Result } from '../../framework/types/result.js'

import { BaseError } from '../../framework/error/mod.js'

import { makeError, makeSuccess } from '../../framework/types/result.js'
import { generateKeypair } from './internal/generate-keypair.js'
import { buildSerde } from './internal/serde.js'

export class CreateEncryptionKeypairError extends BaseError {
  public readonly _tag = 'CreateEncryptionKeypairError'

  constructor(public readonly cause: unknown) {
    super(`failed to create encryption keypair: ${cause}`)
  }
}

export function buildCreateKeypair() {
  return async function createKeypair(): Promise<
    Result<CreateEncryptionKeypairError, EncryptionKeypair>
  > {
    try {
      const keypair = await generateKeypair()

      const serde = buildSerde()

      const { privateKey, publicKey } = await serde.serialize(keypair)

      return makeSuccess({ privateKey, publicKey } as const)
    } catch (cause: unknown) {
      return makeError(new CreateEncryptionKeypairError(cause))
    }
  }
}