// internal/models/lost_item.go
package models

import (
	"time"

	"gorm.io/gorm"
)

// LostItem represents a lost item report
type LostItem struct {
	ID          uint           `gorm:"primaryKey" json:"id"`
	UserID      uint           `gorm:"not null" json:"user_id"`
	User        User           `gorm:"foreignKey:UserID" json:"user,omitempty"`
	Name        string         `gorm:"type:varchar(100);not null" json:"name"`
	CategoryID  uint           `gorm:"not null" json:"category_id"`
	Category    Category       `gorm:"foreignKey:CategoryID" json:"category,omitempty"`
	Color       string         `gorm:"type:varchar(50)" json:"color"`
	Location    string         `gorm:"type:varchar(200)" json:"location"` // Optional
	Description string         `gorm:"type:text;not null" json:"description"`
	DateLost    time.Time      `gorm:"not null" json:"date_lost"`
	Status      string         `gorm:"type:varchar(50);default:'active'" json:"status"` // active, found, expired
	CreatedAt   time.Time      `json:"created_at"`
	UpdatedAt   time.Time      `json:"updated_at"`
	DeletedAt   gorm.DeletedAt `gorm:"index" json:"-"`

	// Relationships
	MatchResults []MatchResult `gorm:"foreignKey:LostItemID" json:"match_results,omitempty"`
}

// TableName specifies the table name for LostItem model
func (LostItem) TableName() string {
	return "lost_items"
}

// LostItem status constants
const (
	LostItemStatusActive  = "active"
	LostItemStatusFound   = "found"
	LostItemStatusExpired = "expired"
)

// BeforeCreate hook
func (l *LostItem) BeforeCreate(tx *gorm.DB) error {
	if l.Status == "" {
		l.Status = LostItemStatusActive
	}
	return nil
}

// IsActive checks if lost item is still active
func (l *LostItem) IsActive() bool {
	return l.Status == LostItemStatusActive
}

// LostItemResponse represents lost item data for API responses
type LostItemResponse struct {
	ID          uint      `json:"id"`
	UserName    string    `json:"user_name"`
	Name        string    `json:"name"`
	Category    string    `json:"category"`
	Color       string    `json:"color"`
	Location    string    `json:"location"`
	Description string    `json:"description"`
	DateLost    time.Time `json:"date_lost"`
	Status      string    `json:"status"`
	CreatedAt   time.Time `json:"created_at"`
}

// ToResponse converts LostItem to LostItemResponse
func (l *LostItem) ToResponse() LostItemResponse {
	userName := ""
	if l.User.ID != 0 {
		userName = l.User.Name
	}

	categoryName := ""
	if l.Category.ID != 0 {
		categoryName = l.Category.Name
	}

	return LostItemResponse{
		ID:          l.ID,
		UserName:    userName,
		Name:        l.Name,
		Category:    categoryName,
		Color:       l.Color,
		Location:    l.Location,
		Description: l.Description,
		DateLost:    l.DateLost,
		Status:      l.Status,
		CreatedAt:   l.CreatedAt,
	}
}