package domain

import (
	"errors"
	"time"

	"github.com/google/uuid"
)

type TokenStatus string

const (
	TokenStatusActive  TokenStatus = "active"
	TokenStatusUsed    TokenStatus = "used"
	TokenStatusRevoked TokenStatus = "revoked"
	TokenStatusExpired TokenStatus = "expired"
)

type Token struct {
	ID        uuid.UUID   `json:"id"`
	GuestID   uuid.UUID   `json:"guest_id"`
	TokenHash string      `json:"-"`
	ExpiresAt time.Time   `json:"expires_at"`
	Status    TokenStatus `json:"status"`
	UsedAt    *time.Time  `json:"used_at,omitempty"`
	CreatedAt time.Time   `json:"created_at"`
}

func (t *Token) IsValid(now time.Time) error {
	switch t.Status {
	case TokenStatusUsed:
		return ErrTokenAlreadyUsed
	case TokenStatusRevoked:
		return ErrTokenRevoked
	case TokenStatusExpired:
		return ErrTokenExpired
	}
	if now.After(t.ExpiresAt) {
		return ErrTokenExpired
	}
	return nil
}

var (
	ErrTokenNotFound    = errors.New("token not found")
	ErrTokenExpired     = errors.New("token expired")
	ErrTokenRevoked     = errors.New("token revoked")
	ErrTokenAlreadyUsed = errors.New("token already used")
)