package useCases

import (
	"RenewCMS/internal/domain/purge"
	"time"
)

type UpdatePurgeSettingsCommand struct {
	AutoPurgeEnabled      *bool
	AutoPurgeIntervalDays *int
}

type UpdatePurgeSettingsUseCase struct {
	repository purge.Repository
	now        func() time.Time
}

func NewUpdatePurgeSettingsUseCase(repository purge.Repository, now func() time.Time) *UpdatePurgeSettingsUseCase {
	return &UpdatePurgeSettingsUseCase{repository, now}
}

func (u *UpdatePurgeSettingsUseCase) Update(command UpdatePurgeSettingsCommand) (purge.Settings, error) {
	if command.AutoPurgeIntervalDays != nil {
		if err := purge.ValidateIntervalDays(*command.AutoPurgeIntervalDays); err != nil {
			return purge.Settings{}, err
		}
	}

	settings, err := u.repository.Get()
	if err != nil {
		return purge.Settings{}, err
	}

	if command.AutoPurgeEnabled != nil {
		if *command.AutoPurgeEnabled && !settings.AutoPurgeEnabled {
			enabledAt := u.now().UTC()
			settings.EnabledAt = &enabledAt
		}
		settings.AutoPurgeEnabled = *command.AutoPurgeEnabled
	}
	if command.AutoPurgeIntervalDays != nil {
		settings.AutoPurgeIntervalDays = *command.AutoPurgeIntervalDays
	}

	if err := u.repository.Save(settings); err != nil {
		return purge.Settings{}, err
	}
	return settings, nil
}