package model

import (
	"time"

	"gorm.io/datatypes"
)

// ProcessEvent 是订单、提号等交易流程的不可变操作留痕。
// 当前业务表仍保存当前状态；此表只追加，用于还原每一步由谁填写、修改和确认。
type ProcessEvent struct {
	ID             uint64         `gorm:"primaryKey" json:"id"`
	BusinessType   string         `gorm:"size:32;not null;index:idx_process_event_business" json:"business_type"`
	BusinessID     uint64         `gorm:"not null;index:idx_process_event_business" json:"business_id"`
	Stage          string         `gorm:"size:32;not null;default:''" json:"stage"`
	Action         string         `gorm:"size:64;not null" json:"action"`
	ActorType      string         `gorm:"size:16;not null" json:"actor_type"`
	ActorID        uint64         `gorm:"not null;default:0" json:"actor_id"`
	ActorName      string         `gorm:"size:128;not null;default:''" json:"actor_name"`
	TargetType     string         `gorm:"size:16;not null;default:''" json:"target_type"`
	TargetID       *uint64        `json:"target_id,omitempty"`
	TargetName     string         `gorm:"size:128;not null;default:''" json:"target_name"`
	Content        string         `gorm:"type:text" json:"content"`
	Reason         string         `gorm:"type:text" json:"reason"`
	Payload        datatypes.JSON `gorm:"not null" json:"payload"`
	AttachmentURLs datatypes.JSON `gorm:"column:attachment_urls;not null" json:"attachment_urls"`
	StateBefore    datatypes.JSON `gorm:"column:state_before;not null" json:"state_before"`
	StateAfter     datatypes.JSON `gorm:"column:state_after;not null" json:"state_after"`
	CreatedAt      time.Time      `gorm:"index" json:"created_at"`
}

func (ProcessEvent) TableName() string {
	return "process_events"
}