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class Screening(private val movie: Movie, private val sequence: Int, private val whenScreened: LocalDateTime) {
    fun getStartTime() = whenScreened
    fun isSequence(sequence: Int) = this.sequence == sequence
    fun getMovieFee() = movie.fee


    fun calculateFee(audienceCount: Int): Money {
        when (movie.movieType) {
            MovieType.AMOUNT_DISCOUNT -> if (movie.isDiscountable(whenScreened, sequence))
                return movie.calculateAmountDiscountedFee().times(audienceCount.toDouble())

            MovieType.PERCENT_DISCOUNT -> if (movie.isDiscountable(whenScreened, sequence))
                return movie.calculatePercentDiscountedFee().times(audienceCount.toDouble())

            MovieType.NONE_DISCOUNT -> return movie.calculateNoneDiscountedFee().times(audienceCount.toDouble())
        }
        return movie.calculateNoneDiscountedFee().times(audienceCount.toDouble())
    }
}

class Money(private val amount: BigDecimal) {
    companion object {
        val ZERO = wons(0)

        fun wons(amount: Long) = Money(BigDecimal.valueOf(amount))
        fun wons(amount: Double) = Money(BigDecimal.valueOf(amount))
    }

    fun plus(amount: Money) = Money(this.amount.add(amount.amount))
    fun minus(amount: Money) = Money(this.amount.subtract(amount.amount))
    fun times(percent: Double) = Money(this.amount.multiply(BigDecimal.valueOf(percent)))
    fun isLessThan(other: Money) = amount < other.amount
    fun isGreaterThan(other: Money) = amount >= other.amount
}


class DisCountCondition(
    val discountConditionType: DiscountConditionType,
    val sequence: Int,
    val dayOfWeek: DayOfWeek,
    val startTime: LocalTime,
    val endTime: LocalTime

) {
    fun isDiscountable(dayOfWeek: DayOfWeek, time: LocalTime): Boolean {
        if (discountConditionType != DiscountConditionType.PERIOD) {
            throw IllegalArgumentException()
        }
        return this.dayOfWeek == dayOfWeek && startTime <= time && endTime >= time
    }

    fun isDiscountable(sequence: Int): Boolean {
        if (discountConditionType != DiscountConditionType.SEQUENCE) {
            throw IllegalArgumentException()
        }
        return this.sequence == sequence
    }
}

enum class MovieType {
    AMOUNT_DISCOUNT, PERCENT_DISCOUNT, NONE_DISCOUNT
}

enum class DiscountConditionType {
    SEQUENCE, PERIOD
}


data class Movie(
    val title: String,
    val runningTime: Duration,
    val fee: Money,
    val discountConditions: List<DisCountCondition>,
    val movieType: MovieType,
    val discountAmount: Money,
    val discountPercent: Double,
) {
    fun calculateAmountDiscountedFee(): Money {
        if (movieType != MovieType.AMOUNT_DISCOUNT) {
            throw IllegalArgumentException()
        }
        return fee.minus(discountAmount)
    }

    fun calculatePercentDiscountedFee(): Money {
        if (movieType != MovieType.PERCENT_DISCOUNT) {
            throw IllegalArgumentException()
        }
        return fee.minus(fee.times(discountPercent))
    }

    fun calculateNoneDiscountedFee(): Money {
        if (movieType != MovieType.NONE_DISCOUNT) {
            throw IllegalArgumentException()
        }
        return fee
    }

    fun isDiscountable(whenScreened: LocalDateTime, sequence: Int): Boolean {
        for (condition in discountConditions) {
            if (condition.discountConditionType == DiscountConditionType.PERIOD) {
                if (condition.isDiscountable(whenScreened.dayOfWeek, whenScreened.toLocalTime())) {
                    return true
                }
            } else if (condition.isDiscountable(sequence)) {
                return true
            }
        }
        return false
    }
}

data class Reservation(
    val customer: Customer, val screening: Screening, val fee: Money, val audienceCount: Int
)

class ReservationAgency {
    fun reserve(screening: Screening, customer: Customer, audienceCount: Int): Reservation {
        val fee = screening.calculateFee(audienceCount)
        return Reservation(customer, screening, fee, audienceCount)
    }
}

class Customer()

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class Rectangle_Bad(var left: Int, var top: Int, var right: Int, var bottom: Int) {
    // 캡슐화 X
}

class Rectangle_Good(var left: Int, var top: Int, var right: Int, var bottom: Int) { // 캡슐화 O
    // 너비와 높이를 조절하는 로직을 캡슐화하여 Rectangle 스스로 증가시키도록, '책임을 이동'
    fun enlarge(multiple: Int) {
        right *= multiple
        bottom *= multiple
    }
}

class AnyClass() {
    fun anyMethodForBad(rectangle: Rectangle_Bad, multiple: Int) {
        rectangle.right *= multiple
        rectangle.bottom *= multiple
    }

    fun anyMethodForGood(rectangle: Rectangle_Good, multiple: Int) {
        rectangle.enlarge(multiple)
    }
}