package model

import (
	"time"

	"gorm.io/datatypes"
)

// ApprovalInstance 是渠道无关的通用审批实例持久化模型。
type ApprovalInstance struct {
	ID                 uint           `gorm:"column:id;primaryKey;autoIncrement" json:"id"`
	BusinessType       string         `gorm:"column:business_type;type:varchar(64);not null;uniqueIndex:uq_approval_instance_business,priority:1" json:"business_type"`
	BusinessID         uint           `gorm:"column:business_id;not null;uniqueIndex:uq_approval_instance_business,priority:2" json:"business_id"`
	SubmitterAccountID uint           `gorm:"column:submitter_account_id;not null;index" json:"submitter_account_id"`
	SubmitterSnapshot  datatypes.JSON `gorm:"column:submitter_snapshot;type:jsonb;not null" json:"submitter_snapshot"`
	Provider           string         `gorm:"column:provider;type:varchar(32);not null" json:"provider"`
	ExternalRef        string         `gorm:"column:external_ref;type:varchar(128);not null;default:''" json:"external_ref"`
	Status             int            `gorm:"column:status;type:int;not null;default:0;index:idx_approval_instance_status_changed,priority:1" json:"status"`
	RequestSnapshot    datatypes.JSON `gorm:"column:request_snapshot;type:jsonb;not null" json:"request_snapshot"`
	DecisionSnapshot   datatypes.JSON `gorm:"column:decision_snapshot;type:jsonb" json:"decision_snapshot,omitempty"`
	CorrelationID      string         `gorm:"column:correlation_id;type:varchar(100);not null;index" json:"correlation_id"`
	Version            int            `gorm:"column:version;type:int;not null;default:1" json:"version"`
	StatusChangedAt    time.Time      `gorm:"column:status_changed_at;type:timestamptz;not null;index:idx_approval_instance_status_changed,priority:2" json:"status_changed_at"`
	CreatedAt          time.Time      `gorm:"column:created_at;type:timestamptz;not null;autoCreateTime" json:"created_at"`
	UpdatedAt          time.Time      `gorm:"column:updated_at;type:timestamptz;not null;autoUpdateTime" json:"updated_at"`
}

// TableName 返回通用审批实例表名。
func (ApprovalInstance) TableName() string {
	return "tb_approval_instance"
}