// models/event.go
package models

import (
	"time"
	
	"gorm.io/gorm"
)

type EventType string

const (
	EventTypeRace     EventType = "race"
	EventTypeTraining EventType = "training"
	EventTypeSocial   EventType = "social"
	EventTypeWorkshop EventType = "workshop"
)

type Event struct {
	ID               uint      `json:"id" gorm:"primaryKey"`
	Title            string    `json:"title" gorm:"size:255;not null"`
	Description      string    `json:"description" gorm:"type:text;not null"`
	Date             time.Time `json:"date" gorm:"not null;index"`
	Location         string    `json:"location" gorm:"size:255;not null"`
	Type             EventType `json:"type" gorm:"type:varchar(20);not null"`
	Distance         string    `json:"distance" gorm:"size:50"`              // Дистанция забега
	ParticipantsCount int      `json:"participants_count" gorm:"default:0"`  // Количество участников
	MaxParticipants  int       `json:"max_participants" gorm:"default:0"`    // Максимальное количество участников
	RegistrationOpen bool      `json:"registration_open" gorm:"default:true"` // Открыта ли регистрация
	Image            string    `json:"image" gorm:"size:500"`                // Изображение события
	CreatedAt        time.Time `json:"created_at"`
	UpdatedAt        time.Time `json:"updated_at"`

	// Связи
	Registrations []EventRegistration `json:"registrations,omitempty" gorm:"foreignKey:EventID"`
}

type EventRegistration struct {
	ID        uint       `json:"id" gorm:"primaryKey"`
	EventID   uint       `json:"event_id" gorm:"not null;index"`
	UserID    uint       `json:"user_id" gorm:"not null;index"`
	Status    string     `json:"status" gorm:"size:20;default:pending"` // pending, confirmed, cancelled, completed
	ResultTime *string   `json:"result_time" gorm:"size:20"`            // Результат забега
	BibNumber *string    `json:"bib_number" gorm:"size:10"`             // Стартовый номер
	CreatedAt time.Time  `json:"created_at"`
	UpdatedAt time.Time  `json:"updated_at"`

	// Связи
	Event Event `json:"event,omitempty" gorm:"foreignKey:EventID"`
	User  User  `json:"user,omitempty" gorm:"foreignKey:UserID"`
}

// BeforeCreate hooks
func (e *Event) BeforeCreate(tx *gorm.DB) error {
	if e.CreatedAt.IsZero() {
		e.CreatedAt = time.Now()
	}
	if e.UpdatedAt.IsZero() {
		e.UpdatedAt = time.Now()
	}
	return nil
}

func (er *EventRegistration) BeforeCreate(tx *gorm.DB) error {
	if er.CreatedAt.IsZero() {
		er.CreatedAt = time.Now()
	}
	if er.UpdatedAt.IsZero() {
		er.UpdatedAt = time.Now()
	}
	return nil
}

// BeforeUpdate hooks
func (e *Event) BeforeUpdate(tx *gorm.DB) error {
	e.UpdatedAt = time.Now()
	return nil
}

func (er *EventRegistration) BeforeUpdate(tx *gorm.DB) error {
	er.UpdatedAt = time.Now()
	return nil
}

// DTO для создания события
type EventCreateRequest struct {
	Title            string    `json:"title" validate:"required,min=5,max=255"`
	Description      string    `json:"description" validate:"required,min=10"`
	Date             time.Time `json:"date" validate:"required"`
	Location         string    `json:"location" validate:"required,max=255"`
	Type             EventType `json:"type" validate:"required,oneof=race training social workshop"`
	Distance         string    `json:"distance" validate:"max=50"`
	MaxParticipants  int       `json:"max_participants" validate:"min=0"`
	RegistrationOpen bool      `json:"registration_open"`
	Image            string    `json:"image" validate:"max=500"`
}

// DTO для регистрации на событие
type EventRegistrationRequest struct {
	EventID uint `json:"event_id" validate:"required"`
}