package models

import (
	"time"

	"gorm.io/gorm"
)

// InviteCodeApplication 邀请码申请模型
type InviteCodeApplication struct {
	ID           uint           `json:"id" gorm:"primaryKey;autoIncrement;comment:主键ID"`
	Email        string         `json:"email" gorm:"not null;type:varchar(255);index;comment:申请邮箱"`
	Reason       string         `json:"reason" gorm:"type:text;comment:申请理由"`
	Language     string         `json:"language" gorm:"type:varchar(10);default:'zh';comment:语言:zh-中文,en-英文"`
	Status       string         `json:"status" gorm:"not null;type:varchar(20);default:'pending';index;comment:申请状态:pending-待处理,approved-已通过,rejected-已拒绝"`
	InviteCodeID *uint          `json:"invite_code_id" gorm:"comment:关联的邀请码ID"`
	InviteCode   *InviteCode    `json:"invite_code" gorm:"foreignKey:InviteCodeID;constraint:OnDelete:SET NULL;-:migration"`
	RejectReason string         `json:"reject_reason" gorm:"type:text;comment:拒绝理由"`
	ApprovedAt   *time.Time     `json:"approved_at" gorm:"comment:审批时间"`
	ApprovedBy   string         `json:"approved_by" gorm:"type:varchar(64);comment:审批人"`
	EmailSentAt  *time.Time     `json:"email_sent_at" gorm:"comment:邮件发送时间"`
	CreatedAt    time.Time      `json:"created_at" gorm:"not null;comment:创建时间"`
	UpdatedAt    time.Time      `json:"updated_at" gorm:"not null;comment:更新时间"`
	DeletedAt    gorm.DeletedAt `json:"-" gorm:"index;comment:软删除时间"`
}

// TableName 指定数据库表名
func (InviteCodeApplication) TableName() string {
	return "admin_invite_code_applications"
}

// InviteCodeApplicationListRequest 申请列表请求
type InviteCodeApplicationListRequest struct {
	Email     string `form:"email"`
	Status    string `form:"status"` // pending, approved, rejected
	StartTime string `form:"start_time"`
	EndTime   string `form:"end_time"`
	Page      int    `form:"page,default=1"`
	Size      int    `form:"size,default=20"`
}

// InviteCodeApplicationCreateRequest 创建申请请求（官网提交）
type InviteCodeApplicationCreateRequest struct {
	Email    string `json:"email" binding:"required,email"`
	Reason   string `json:"reason"`
	Language string `json:"language"` // zh 或 en，默认 zh
}

// InviteCodeApplicationApproveRequest 审批通过请求
type InviteCodeApplicationApproveRequest struct {
	ApplicationID uint `json:"application_id" binding:"required"`
	ValidDays     int  `json:"valid_days"` // 有效期天数，默认7天
}

// InviteCodeApplicationRejectRequest 审批拒绝请求
type InviteCodeApplicationRejectRequest struct {
	ApplicationID uint   `json:"application_id" binding:"required"`
	RejectReason  string `json:"reject_reason"`
}

// InviteCodeApplicationBatchApproveRequest 批量审批通过请求
type InviteCodeApplicationBatchApproveRequest struct {
	ApplicationIDs []uint `json:"application_ids" binding:"required"`
	ValidDays      int    `json:"valid_days"` // 有效期天数，默认7天
}

// InviteCodeApplicationBatchRejectRequest 批量审批拒绝请求
type InviteCodeApplicationBatchRejectRequest struct {
	ApplicationIDs []uint `json:"application_ids" binding:"required"`
	RejectReason   string `json:"reject_reason"`
}

// InviteCodeApplicationListResponse 申请列表响应
type InviteCodeApplicationListResponse struct {
	List  []InviteCodeApplication `json:"list"`
	Total int64                   `json:"total"`
}

// InviteCodeApplicationStatistics 申请统计
type InviteCodeApplicationStatistics struct {
	TotalPending  int `json:"total_pending"`  // 待处理数量
	TotalApproved int `json:"total_approved"` // 已通过数量
	TotalRejected int `json:"total_rejected"` // 已拒绝数量
	TodayApplied  int `json:"today_applied"`  // 今日申请数量
}

// 申请状态常量
const (
	ApplicationStatusPending  = "pending"
	ApplicationStatusApproved = "approved"
	ApplicationStatusRejected = "rejected"
)