package roomescape.reservation.business

import io.kotest.assertions.throwables.shouldThrow
import io.kotest.core.spec.style.FunSpec
import io.kotest.matchers.shouldBe
import io.mockk.every
import io.mockk.mockk
import org.springframework.data.repository.findByIdOrNull
import roomescape.member.business.MemberService
import roomescape.member.infrastructure.persistence.Role
import roomescape.reservation.exception.ReservationErrorCode
import roomescape.reservation.exception.ReservationException
import roomescape.reservation.infrastructure.persistence.ReservationRepository
import roomescape.reservation.infrastructure.persistence.ReservationStatus
import roomescape.theme.business.ThemeService
import roomescape.time.business.TimeService
import roomescape.util.MemberFixture
import roomescape.util.ReservationFixture
import roomescape.util.TsidFactory
import roomescape.util.TimeFixture
import java.time.LocalDate
import java.time.LocalTime

class ReservationServiceTest : FunSpec({

    val reservationRepository: ReservationRepository = mockk()
    val timeService: TimeService = mockk()
    val memberService: MemberService = mockk()
    val themeService: ThemeService = mockk()
    val reservationService = ReservationService(
        TsidFactory,
        reservationRepository,
        timeService,
        memberService,
        themeService
    )

    context("예약을 추가할 때") {
        test("이미 예약이 있으면 예외를 던진다.") {
            every {
                reservationRepository.exists(any())
            } returns true

            val reservationRequest = ReservationFixture.createRequest()

            shouldThrow<ReservationException> {
                reservationService.createConfirmedReservation(reservationRequest, 1L)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.RESERVATION_DUPLICATED
            }
        }

        context("날짜, 시간이 잘못 입력되면 예외를 던진다.") {
            every {
                reservationRepository.exists(any())
            } returns false

            every {
                themeService.findById(any())
            } returns mockk()

            every {
                memberService.findById(any())
            } returns mockk()


            test("지난 날짜이면 예외를 던진다.") {
                val reservationRequest = ReservationFixture.createRequest().copy(
                    date = LocalDate.now().minusDays(1)
                )

                every {
                    timeService.findById(any())
                } returns TimeFixture.create()

                shouldThrow<ReservationException> {
                    reservationService.createConfirmedReservation(reservationRequest, 1L)
                }.also {
                    it.errorCode shouldBe ReservationErrorCode.PAST_REQUEST_DATETIME
                }
            }

            test("지난 시간이면 예외를 던진다.") {
                val reservationRequest = ReservationFixture.createRequest().copy(
                    date = LocalDate.now(),
                )

                every {
                    timeService.findById(reservationRequest.timeId)
                } returns TimeFixture.create(
                    startAt = LocalTime.now().minusMinutes(1)
                )

                shouldThrow<ReservationException> {
                    reservationService.createConfirmedReservation(reservationRequest, 1L)
                }.also {
                    it.errorCode shouldBe ReservationErrorCode.PAST_REQUEST_DATETIME
                }
            }
        }
    }

    context("예약 대기를 걸 때") {
        test("이미 예약한 회원이 같은 날짜와 테마로 대기를 걸면 예외를 던진다.") {
            val reservationRequest = ReservationFixture.createRequest().copy(
                date = LocalDate.now(),
                themeId = 1L,
                timeId = 1L,
            )

            every {
                reservationRepository.exists(any())
            } returns true

            shouldThrow<ReservationException> {
                val waitingRequest = ReservationFixture.createWaitingRequest(
                    date = reservationRequest.date,
                    themeId = reservationRequest.themeId,
                    timeId = reservationRequest.timeId
                )
                reservationService.createWaiting(waitingRequest, 1L)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.ALREADY_RESERVE
            }
        }
    }

    context("예약 대기를 취소할 때") {
        val reservationId = 1L
        val member = MemberFixture.create(id = 1L, role = Role.MEMBER)
        test("예약을 찾을 수 없으면 예외를 던진다.") {
            every {
                reservationRepository.findByIdOrNull(reservationId)
            } returns null

            shouldThrow<ReservationException> {
                reservationService.deleteWaiting(reservationId, member.id!!)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.RESERVATION_NOT_FOUND
            }
        }

        test("대기중인 해당 예약이 이미 확정된 상태라면 예외를 던진다.") {
            val alreadyConfirmed = ReservationFixture.create(
                id = reservationId,
                status = ReservationStatus.CONFIRMED
            )
            every {
                reservationRepository.findByIdOrNull(reservationId)
            } returns alreadyConfirmed

            shouldThrow<ReservationException> {
                reservationService.deleteWaiting(reservationId, member.id!!)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.ALREADY_CONFIRMED
            }
        }

        test("타인의 대기를 취소하려고 하면 예외를 던진다.") {
            val otherMembersWaiting = ReservationFixture.create(
                id = reservationId,
                member = MemberFixture.create(id = member.id!! + 1L),
                status = ReservationStatus.WAITING
            )

            every {
                reservationRepository.findByIdOrNull(reservationId)
            } returns otherMembersWaiting

            shouldThrow<ReservationException> {
                reservationService.deleteWaiting(reservationId, member.id!!)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.NOT_RESERVATION_OWNER
            }
        }
    }

    context("예약을 조회할 때") {
        test("종료 날짜가 시작 날짜보다 이전이면 예외를 던진다.") {
            val startFrom = LocalDate.now()
            val endAt = startFrom.minusDays(1)

            shouldThrow<ReservationException> {
                reservationService.searchReservations(
                    null,
                    null,
                    startFrom,
                    endAt
                )
            }.also {
                it.errorCode shouldBe ReservationErrorCode.INVALID_SEARCH_DATE_RANGE
            }
        }
    }

    context("대기중인 예약을 승인할 때") {
        test("관리자가 아니면 예외를 던진다.") {
            val member = MemberFixture.create(id = 1L, role = Role.MEMBER)

            every {
                memberService.findById(any())
            } returns member

            shouldThrow<ReservationException> {
                reservationService.confirmWaiting(1L, member.id!!)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.NO_PERMISSION
            }
        }

        test("이미 확정된 예약이 있으면 예외를 던진다.") {
            val member = MemberFixture.create(id = 1L, role = Role.ADMIN)
            val reservationId = 1L

            every {
                memberService.findById(any())
            } returns member

            every {
                reservationRepository.isExistConfirmedReservation(reservationId)
            } returns true

            shouldThrow<ReservationException> {
                reservationService.confirmWaiting(reservationId, member.id!!)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.CONFIRMED_RESERVATION_ALREADY_EXISTS
            }
        }
    }

    context("대기중인 예약을 거절할 때") {
        test("관리자가 아니면 예외를 던진다.") {
            val member = MemberFixture.create(id = 1L, role = Role.MEMBER)

            every {
                memberService.findById(any())
            } returns member

            shouldThrow<ReservationException> {
                reservationService.rejectWaiting(1L, member.id!!)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.NO_PERMISSION
            }
        }

        test("예약을 찾을 수 없으면 예외를 던진다.") {
            val member = MemberFixture.create(id = 1L, role = Role.ADMIN)
            val reservationId = 1L

            every {
                memberService.findById(member.id!!)
            } returns member

            every {
                reservationRepository.findByIdOrNull(reservationId)
            } returns null

            shouldThrow<ReservationException> {
                reservationService.rejectWaiting(reservationId, member.id!!)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.RESERVATION_NOT_FOUND
            }
        }

        test("이미 확정된 예약이면 예외를 던진다.") {
            val member = MemberFixture.create(id = 1L, role = Role.ADMIN)
            val reservation = ReservationFixture.create(
                id = 1L,
                status = ReservationStatus.CONFIRMED
            )

            every {
                memberService.findById(member.id!!)
            } returns member

            every {
                reservationRepository.findByIdOrNull(reservation.id!!)
            } returns reservation

            shouldThrow<ReservationException> {
                reservationService.rejectWaiting(reservation.id!!, member.id!!)
            }.also {
                it.errorCode shouldBe ReservationErrorCode.ALREADY_CONFIRMED
            }
        }
    }
})