package model

import (
	"strconv"
	"time"

	"carrot_bbs/internal/pkg/utils"

	"gorm.io/gorm"
)

type GroupJoinRequestType string

const (
	GroupJoinRequestTypeInvite    GroupJoinRequestType = "invite"
	GroupJoinRequestTypeJoinApply GroupJoinRequestType = "join_apply"
)

type GroupJoinRequestStatus string

const (
	GroupJoinRequestStatusPending   GroupJoinRequestStatus = "pending"
	GroupJoinRequestStatusAccepted  GroupJoinRequestStatus = "accepted"
	GroupJoinRequestStatusRejected  GroupJoinRequestStatus = "rejected"
	GroupJoinRequestStatusCancelled GroupJoinRequestStatus = "cancelled"
	GroupJoinRequestStatusExpired   GroupJoinRequestStatus = "expired"
)

// GroupJoinRequest 统一保存邀请入群和主动加群申请
type GroupJoinRequest struct {
	ID           string                 `gorm:"primaryKey;size:20" json:"id"`
	Flag         string                 `gorm:"size:64;uniqueIndex;not null" json:"flag"`
	GroupID      string                 `gorm:"not null;index;index:idx_gjr_group_target_type_status_created,priority:1" json:"group_id"`
	InitiatorID  string                 `gorm:"type:varchar(36);not null;index" json:"initiator_id"`
	TargetUserID string                 `gorm:"type:varchar(36);not null;index;index:idx_gjr_group_target_type_status_created,priority:2" json:"target_user_id"`
	RequestType  GroupJoinRequestType   `gorm:"size:20;not null;index;index:idx_gjr_group_target_type_status_created,priority:3" json:"request_type"`
	Status       GroupJoinRequestStatus `gorm:"size:20;not null;index;index:idx_gjr_group_target_type_status_created,priority:4" json:"status"`
	Reason       string                 `gorm:"size:500" json:"reason"`
	ReviewerID   string                 `gorm:"type:varchar(36);index" json:"reviewer_id"`
	ReviewedAt   *time.Time             `json:"reviewed_at"`
	ExpireAt     *time.Time             `json:"expire_at"`
	CreatedAt    time.Time              `gorm:"index:idx_gjr_group_target_type_status_created,priority:5,sort:desc" json:"created_at"`
	UpdatedAt    time.Time              `json:"updated_at"`
}

func (r *GroupJoinRequest) BeforeCreate(tx *gorm.DB) error {
	if r.ID == "" {
		id, err := utils.GetSnowflake().GenerateID()
		if err != nil {
			return err
		}
		r.ID = strconv.FormatInt(id, 10)
	}
	return nil
}

func (GroupJoinRequest) TableName() string {
	return "group_join_requests"
}