package model

import (
	"time"

	"gorm.io/gorm"
)

type PostReferenceStatus string

const (
	PostRefActive PostReferenceStatus = "active"
	PostRefDead   PostReferenceStatus = "dead"
	PostRefHidden PostReferenceStatus = "hidden"
)

type PostReference struct {
	ID           string               `json:"id" gorm:"type:varchar(36);primaryKey"`
	SourcePostID string               `json:"source_post_id" gorm:"type:varchar(36);not null;uniqueIndex:uq_source_target;index:idx_source_post"`
	TargetPostID string               `json:"target_post_id" gorm:"type:varchar(36);not null;uniqueIndex:uq_source_target;index:idx_target_post;index:idx_target_status"`
	Status       PostReferenceStatus  `json:"status" gorm:"type:varchar(20);default:active;index:idx_target_status"`
	ClickCount   int                  `json:"click_count" gorm:"default:0"`
	CreatedAt    time.Time            `json:"created_at" gorm:"autoCreateTime"`
	UpdatedAt    time.Time            `json:"updated_at" gorm:"autoUpdateTime:false"`

	SourcePost *Post `json:"source_post,omitempty" gorm:"foreignKey:SourcePostID"`
	TargetPost *Post `json:"target_post,omitempty" gorm:"foreignKey:TargetPostID"`
}

func (pr *PostReference) BeforeCreate(tx *gorm.DB) error {
	SetUUIDIfEmpty(&pr.ID)
	return nil
}

func (PostReference) TableName() string {
	return "post_references"
}