package ddd.domain.validation.changeUsername

import shared.exceptions.ChangeUsernameException
import shared.validation.AbstractValidationHandler
import java.time.Duration
import java.time.LocalDateTime

class TimeIntervalValidation : AbstractValidationHandler<UsernameChangeContext>() {
    override fun validate(context: UsernameChangeContext) {
        val lastChange = context.user.lastUsernameChange
        val policy = context.user.rank.policy
        
        lastChange?.let { 
            val daysBetween = Duration.between(it, LocalDateTime.now(context.clock)).toDays()
            if (daysBetween < policy.getMaxChangeIntervalDays()) {
                throw ChangeUsernameException("30天内禁止重复修改")
            }
        }
        next(context) // 传递至下一个验证器
    }
}