package chat

import (
	"hfb_sys/backend/internal/model"

	"gorm.io/gorm"
)

// DefaultSupportAdminID 导出默认客服选择逻辑，供其他业务模块建群时复用。
func DefaultSupportAdminID(tx *gorm.DB) uint64 {
	return defaultSupportAdminID(tx)
}

// SendSystemMessageForTx 在事务内发送系统文本消息。
func SendSystemMessageForTx(tx *gorm.DB, conversationID uint64, content string) error {
	return sendSystemMessage(tx, conversationID, content)
}

// SendImageMessageForTx 在事务内发送系统图片消息。
func SendImageMessageForTx(tx *gorm.DB, conversationID uint64, content, imageURL string) error {
	if content == "" {
		content = "👇 请扫码联系客服"
	}
	message := model.ChatMessage{
		ConversationID: conversationID,
		SenderType:     "system",
		SenderRole:     "system",
		ContentType:    "image",
		Content:        content,
		AttachmentURLS: encodeStringList([]string{imageURL}),
	}
	if err := tx.Create(&message).Error; err != nil {
		return err
	}
	return updateConversationLastMessage(tx, conversationID, &message)
}