package model

import (
	"time"

	"spark-server/internal/module/favorite/entity"
)

// Favorite maps table favorites.
type Favorite struct {
	ID             int64     `gorm:"column:id;primaryKey;comment:Snowflake 收藏 id"`
	UserID         int64     `gorm:"column:user_id;comment:收藏者 user_id"`
	MsgID          int64     `gorm:"column:msg_id;comment:原消息 Snowflake id，仅作来源；撤回不影响收藏"`
	ConversationID int64     `gorm:"column:conversation_id;comment:原会话 id，仅作来源"`
	MessageType    int16     `gorm:"column:message_type;comment:消息类型，与 messages.message_type 一致"`
	Content        []byte    `gorm:"column:content;type:blob;comment:收藏快照（JSON 字节）；媒体 key 已复制到 perm/fav/"`
	CreatedAt      time.Time `gorm:"column:created_at;comment:收藏时间"`
}

func (Favorite) TableName() string { return "t_favorites" }

func (r *Favorite) Entity() *entity.Favorite {
	if r == nil {
		return nil
	}
	return &entity.Favorite{
		ID: r.ID, UserID: r.UserID, MsgID: r.MsgID, ConversationID: r.ConversationID,
		MessageType: r.MessageType, Content: r.Content, CreatedAtMS: r.CreatedAt.UnixMilli(),
	}
}

func fromEntity(f *entity.Favorite) *Favorite {
	if f == nil {
		return nil
	}
	row := &Favorite{
		ID: f.ID, UserID: f.UserID, MsgID: f.MsgID, ConversationID: f.ConversationID,
		MessageType: f.MessageType, Content: f.Content,
	}
	if f.CreatedAtMS > 0 {
		row.CreatedAt = time.UnixMilli(f.CreatedAtMS)
	}
	return row
}