package kr.co.vividnext.sodalive.faq

import kr.co.vividnext.sodalive.common.SodaException
import org.springframework.data.repository.findByIdOrNull
import org.springframework.stereotype.Service
import org.springframework.transaction.annotation.Transactional

@Service
class FaqService(
    private val repository: FaqRepository,
    private val queryRepository: FaqQueryRepository
) {
    @Transactional
    fun save(request: CreateFaqRequest): Long {
        if (request.question.isBlank()) throw SodaException(messageKey = "faq.question_required")
        if (request.answer.isBlank()) throw SodaException(messageKey = "faq.answer_required")
        if (request.category.isBlank()) throw SodaException(messageKey = "faq.category_required")

        val category = queryRepository.getCategory(request.category)
            ?: throw SodaException(messageKey = "faq.invalid_category")

        val faq = Faq(request.question, request.answer)
        faq.category = category

        return repository.save(faq).id!!
    }

    @Transactional
    fun modify(request: ModifyFaqRequest) {
        val faq = queryRepository.getFaq(request.id)
            ?: throw SodaException(messageKey = "common.error.invalid_request")

        if (request.question != null) {
            if (request.question.isBlank()) throw SodaException(messageKey = "faq.question_required")
            faq.question = request.question
        }

        if (request.answer != null) {
            if (request.answer.isBlank()) throw SodaException(messageKey = "faq.answer_required")
            faq.answer = request.answer
        }

        if (request.category != null) {
            if (request.category.isBlank()) throw SodaException(messageKey = "faq.category_required")
            val category = queryRepository.getCategory(request.category)
                ?: throw SodaException(messageKey = "faq.invalid_category")
            faq.category = category
        }
    }

    @Transactional
    fun delete(id: Long) {
        if (id <= 0) throw SodaException(messageKey = "common.error.invalid_request")
        val faq = repository.findByIdOrNull(id)
            ?: throw SodaException(messageKey = "common.error.invalid_request")

        faq.isActive = false
    }

    fun getFaqList(category: String) = queryRepository.getFaqList(category)

    fun getCategoryList() = queryRepository.getCategoryList()
}