package models

import (
	"encoding/json"
	"time"
)

type User struct {
	ID           int
	Username     string
	PasswordHash string
	Role         string
	CreatedAt    time.Time
}

type ShareLink struct {
	ID                 int
	Token              string
	ServerID           *int
	ExpiresAt          *time.Time
	MaxUses            int
	ValidityDays       *int
	UseCount           int
	CreatedAt          time.Time
	CleanedAt          *time.Time
	TrafficQuotaGB     *float64
	TrafficUsedGB      float64
	SubscriptionUntil  *time.Time
	AllowedServerIDs   json.RawMessage
}

type ShareCreation struct {
	ID             int64
	ShareLinkID    int
	ServerID       int
	Protocol       string
	ClientID       string
	ConnectionName string
	ResponseJSON   *string
	CreatedAt      time.Time
	DeletedAt      *time.Time
}

type RenewalCode struct {
	ID            int
	Code          string
	AddDays       int
	MaxUses       int
	UseCount      int
	ShareLinkID   *int
	CodeExpiresAt *time.Time
	Note          *string
	CodeTarget    string
	CreatedAt     time.Time
}

type Member struct {
	ID           int
	Username     string
	Email        *string
	PasswordHash string
	CreatedAt    time.Time
	LastLoginAt  *time.Time
}

type MemberSubscription struct {
	MemberID     int
	ExpiresAt    *time.Time
	ValidityDays *int
	MaxConfigs   int
	ConfigCount  int
	CleanedAt    *time.Time
}

type ServerInfo struct {
	ID        int      `json:"id"`
	Label     string   `json:"label"`
	Name      string   `json:"name,omitempty"`
	Protocols []string `json:"protocols"`
	Disabled  bool     `json:"disabled"`
	Flag      string   `json:"flag,omitempty"`
	FlagURL   string   `json:"flag_url,omitempty"`
	Speed     string   `json:"speed,omitempty"`
	Notice    string   `json:"notice,omitempty"`
}

func (l ShareLink) IsFloating() bool {
	return l.ValidityDays != nil && *l.ValidityDays > 0 && l.ExpiresAt == nil
}

func (l ShareLink) IsExpired() bool {
	if l.IsFloating() {
		return false
	}
	if l.ExpiresAt == nil {
		return true
	}
	return l.ExpiresAt.Before(time.Now())
}

func (l ShareLink) ExpiresLabel() string {
	if l.ExpiresAt != nil {
		return l.ExpiresAt.Format("2006-01-02 15:04:05")
	}
	if l.ValidityDays != nil && *l.ValidityDays > 0 {
		return "с первого конфига — " + itoa(*l.ValidityDays) + " дн."
	}
	return "—"
}

func itoa(n int) string {
	if n == 0 {
		return "0"
	}
	neg := n < 0
	if neg {
		n = -n
	}
	var b [20]byte
	i := len(b)
	for n > 0 {
		i--
		b[i] = byte('0' + n%10)
		n /= 10
	}
	if neg {
		i--
		b[i] = '-'
	}
	return string(b[i:])
}