package models

import (
	"time"

	"golang.org/x/crypto/bcrypt"
	"gorm.io/gorm"
)

// User represents a user in the system
type User struct {
	ID        uint           `json:"id" gorm:"primaryKey"`
	Username  string         `json:"username" gorm:"uniqueIndex;not null"`
	Email     string         `json:"email" gorm:"uniqueIndex;not null"`
	Password  string         `json:"-" gorm:"not null"`
	FirstName string         `json:"firstName"`
	LastName  string         `json:"lastName"`
	Role      string         `json:"role" gorm:"default:'user'"` // 'user', 'agent', 'admin'
	Active    bool           `json:"active" gorm:"default:true"`
	CreatedAt time.Time      `json:"createdAt"`
	UpdatedAt time.Time      `json:"updatedAt"`
	DeletedAt gorm.DeletedAt `json:"-" gorm:"index"`
}

// BeforeSave is a GORM hook that hashes the password before saving
func (u *User) BeforeSave(tx *gorm.DB) error {
	if u.Password != "" {
		hashedPassword, err := bcrypt.GenerateFromPassword([]byte(u.Password), bcrypt.DefaultCost)
		if err != nil {
			return err
		}
		u.Password = string(hashedPassword)
	}
	return nil
}

// ComparePassword compares a plaintext password with the user's hashed password
func (u *User) ComparePassword(password string) bool {
	err := bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
	return err == nil
}

// ToSafeUser returns a user object without sensitive information
func (u *User) ToSafeUser() SafeUser {
	return SafeUser{
		ID:        u.ID,
		Username:  u.Username,
		Email:     u.Email,
		FirstName: u.FirstName,
		LastName:  u.LastName,
		Role:      u.Role,
		Active:    u.Active,
		CreatedAt: u.CreatedAt,
		UpdatedAt: u.UpdatedAt,
	}
}

// SafeUser represents user information that can be safely exposed to clients
type SafeUser struct {
	ID        uint      `json:"id"`
	Username  string    `json:"username"`
	Email     string    `json:"email"`
	FirstName string    `json:"firstName"`
	LastName  string    `json:"lastName"`
	Role      string    `json:"role"`
	Active    bool      `json:"active"`
	CreatedAt time.Time `json:"createdAt"`
	UpdatedAt time.Time `json:"updatedAt"`
}