package roomescape.auth.service

import io.github.oshai.kotlinlogging.KLogger
import io.github.oshai.kotlinlogging.KotlinLogging
import org.springframework.stereotype.Service
import roomescape.auth.exception.AuthErrorCode
import roomescape.auth.exception.AuthException
import roomescape.auth.infrastructure.jwt.JwtHandler
import roomescape.auth.web.LoginCheckResponse
import roomescape.auth.web.LoginRequest
import roomescape.auth.web.LoginResponse
import roomescape.member.business.MemberService
import roomescape.member.infrastructure.persistence.MemberEntity

private val log: KLogger = KotlinLogging.logger {}

@Service
class AuthService(
    private val memberService: MemberService,
    private val jwtHandler: JwtHandler
) {
    fun login(request: LoginRequest): LoginResponse {
        val member: MemberEntity = fetchMemberOrThrow(AuthErrorCode.LOGIN_FAILED) {
            memberService.findByEmailAndPassword(request.email, request.password)
        }

        val accessToken: String = jwtHandler.createToken(member.id!!)

        return LoginResponse(accessToken)
    }

    fun checkLogin(memberId: Long): LoginCheckResponse {
        val member: MemberEntity = fetchMemberOrThrow(AuthErrorCode.UNIDENTIFIABLE_MEMBER) {
            memberService.findById(memberId)
        }

        return LoginCheckResponse(member.name, member.role.name)
    }

    private fun fetchMemberOrThrow(
        errorCode: AuthErrorCode,
        block: () -> MemberEntity
    ): MemberEntity {
        try {
            return block()
        } catch (_: Exception) {
            throw AuthException(errorCode)
        }
    }

    fun logout(memberId: Long?) {
        if (memberId != null) {
            log.info { "requested logout for $memberId" }
        }
    }
}