package be.simplenotes.domain.usecases.users.delete

import arrow.core.Either
import arrow.core.extensions.fx
import arrow.core.rightIfNotNull
import be.simplenotes.domain.security.PasswordHash
import be.simplenotes.domain.usecases.repositories.UserRepository
import be.simplenotes.domain.usecases.search.NoteSearcher
import be.simplenotes.domain.validation.UserValidations

internal class DeleteUseCaseImpl(
    private val userRepository: UserRepository,
    private val passwordHash: PasswordHash,
    private val searcher: NoteSearcher,
    ) : DeleteUseCase {
    override fun delete(form: DeleteForm) = Either.fx<DeleteError, Unit> {
        val user = !UserValidations.validateDelete(form)
        val persistedUser = !userRepository.find(user.username).rightIfNotNull { DeleteError.Unregistered }
        !Either.cond(
            passwordHash.verify(user.password, persistedUser.password),
            { Unit },
            { DeleteError.WrongPassword }
        )
        !Either.cond(userRepository.delete(persistedUser.id), { Unit }, { DeleteError.Unregistered })
        searcher.dropIndex(persistedUser.id)
    }
}