package repository

import (
	"carrot_bbs/internal/model"

	"gorm.io/gorm"
)

// ChannelRepository 频道配置仓储
type ChannelRepository struct {
	db *gorm.DB
}

func NewChannelRepository(db *gorm.DB) *ChannelRepository {
	return &ChannelRepository{db: db}
}

func (r *ChannelRepository) ListActive() ([]*model.Channel, error) {
	var channels []*model.Channel
	err := r.db.
		Where("is_active = ?", true).
		Order("sort_order ASC, created_at ASC").
		Find(&channels).Error
	return channels, err
}

func (r *ChannelRepository) ListAll() ([]*model.Channel, error) {
	var channels []*model.Channel
	err := r.db.
		Order("sort_order ASC, created_at ASC").
		Find(&channels).Error
	return channels, err
}

func (r *ChannelRepository) Create(channel *model.Channel) error {
	return r.db.Create(channel).Error
}

func (r *ChannelRepository) Update(channel *model.Channel) error {
	return r.db.Save(channel).Error
}

func (r *ChannelRepository) GetByID(id string) (*model.Channel, error) {
	var channel model.Channel
	if err := r.db.First(&channel, "id = ?", id).Error; err != nil {
		return nil, err
	}
	return &channel, nil
}

// ListByIDs 按 ID 列表查询频道（用于帖子列表批量填充 channel 名称）
func (r *ChannelRepository) ListByIDs(ids []string) ([]*model.Channel, error) {
	if len(ids) == 0 {
		return nil, nil
	}
	var list []*model.Channel
	err := r.db.Where("id IN ?", ids).Find(&list).Error
	if err != nil {
		return nil, err
	}
	return list, nil
}

func (r *ChannelRepository) Delete(id string) error {
	return r.db.Delete(&model.Channel{}, "id = ?", id).Error
}