package model

import (
	"time"

	"gorm.io/gorm"
)

// License 期限常量（天数，0 表示永久） // Logan.Li
const (
	Duration1Month  = 30
	Duration3Months = 90
	Duration6Months = 180
	Duration1Year   = 365
	Duration2Years  = 730
	Duration3Years  = 1095
	Duration5Years  = 1825
	DurationForever = 0
)

// License 状态常量 // Logan.Li
const (
	LicenseStatusInactive  = "inactive"
	LicenseStatusActive    = "active"
	LicenseStatusExpired   = "expired"
	LicenseStatusRevoked   = "revoked"
	LicenseStatusSuspended = "suspended"
)

// PermanentEndDate 永久授权的到期时间（2099-12-31） // Logan.Li
var PermanentEndDate = time.Date(2099, 12, 31, 23, 59, 59, 0, time.UTC)

// License 许可证模型 // Logan.Li
type License struct {
	ID                 uint           `json:"id" gorm:"primaryKey"`
	LicenseKey         string         `json:"license_key" gorm:"size:512;uniqueIndex;not null"` // 在线 LIC-… / 离线 LICOFF-…
	CustomerID         uint           `json:"customer_id"`
	Customer           Customer       `json:"customer,omitempty" gorm:"foreignKey:CustomerID"`
	ProductID          uint           `json:"product_id"`
	Product            Product        `json:"product,omitempty" gorm:"foreignKey:ProductID"`
	Status             string         `json:"status" gorm:"size:20;default:'inactive'"`
	StartDate          time.Time      `json:"start_date"`
	EndDate            time.Time      `json:"end_date"`
	Duration           int            `json:"duration" gorm:"default:365"` // 天数，0 表示永久
	MaxActivations     int            `json:"max_activations" gorm:"default:1"`
	CurrentActivations int            `json:"current_activations" gorm:"default:0"`
	IsTrial            bool           `json:"is_trial" gorm:"default:false"`
	TrialDays          int            `json:"trial_days" gorm:"default:0"`
	RevokeReason       string         `json:"revoke_reason" gorm:"type:text"`
	Notes              string         `json:"notes" gorm:"type:text"`
	Activations        []Activation   `json:"activations,omitempty" gorm:"foreignKey:LicenseID"`
	CreatedAt          time.Time      `json:"created_at"`
	UpdatedAt          time.Time      `json:"updated_at"`
	DeletedAt          gorm.DeletedAt `json:"deleted_at,omitempty" gorm:"index"`
}

// TableName 指定表名 // Logan.Li
func (License) TableName() string {
	return "licenses"
}

// Activation 激活记录模型（机器绑定） // Logan.Li
type Activation struct {
	ID          uint       `json:"id" gorm:"primaryKey"`
	LicenseID   uint       `json:"license_id" gorm:"uniqueIndex:idx_lic_device,priority:1"`
	License     License    `json:"license,omitempty" gorm:"foreignKey:LicenseID"`
	DeviceID    string     `json:"device_id" gorm:"size:100;uniqueIndex:idx_lic_device,priority:2"`
	DeviceName  string     `json:"device_name" gorm:"size:200"`
	DeviceInfo  string     `json:"device_info" gorm:"type:text"` // JSON 格式存储设备信息
	IP          string     `json:"ip" gorm:"size:50"`
	Status      string     `json:"status" gorm:"size:20;default:'active'"` // active / inactive
	IsOnline    bool       `json:"is_online" gorm:"default:false"`
	ActivatedAt time.Time  `json:"activated_at"`
	ExpiresAt   *time.Time `json:"expires_at,omitempty"`
	LastSeenAt  time.Time  `json:"last_seen_at"`
	CreatedAt   time.Time  `json:"created_at"`
	UpdatedAt   time.Time  `json:"updated_at"`
}

// TableName 指定表名 // Logan.Li
func (Activation) TableName() string {
	return "activations"
}