package models

import (
	"golang.org/x/crypto/bcrypt"
	"ms-auth/internal/lib"
	"time"
)

type User struct {
	Id        *int32     `db:"id"`
	Username  *string    `db:"username"`
	Password  *string    `db:"hashed_pwd"`
	Email     *string    `db:"email"`
	ExpiresAt *time.Time `db:"expires_at"`
	CreatedAt *time.Time `db:"created_at"`
	UpdatedAt *time.Time `db:"updated_at"`
	Role      *Role      `db:"role"`
}

func (user *User) ValidUsername() error {
	if user.Username == nil {
		return lib.ErrBadUsername
	}

	err := lib.ValidUsername(*user.Username)
	if err != nil {
		return err
	}

	return nil
}

func (user *User) ValidPassword() error {
	if user.Password == nil {
		return lib.ErrBadHandleOrPassword
	}

	err := lib.ValidPassword(*user.Password)
	if err != nil {
		return err
	}

	return nil
}

func (user *User) ValidEmail() error {
	if user.Email == nil {
		return lib.ErrBadEmail
	}
	return lib.ValidEmail(*user.Email)
}

func (user *User) ValidRole() error {
	if user.Role == nil {
		return lib.ErrBadRole
	}
	return user.Role.Valid()
}

func (user *User) HashPassword() error {
	if user.Password == nil {
		return lib.ErrBadHandleOrPassword
	}
	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(*user.Password), bcrypt.DefaultCost)
	if err != nil {
		return lib.ErrInternal
	}
	user.Password = lib.AsStringP(string(hashedPassword))
	return nil
}

func (user *User) ComparePassword(password string) error {
	if user.Password == nil {
		return lib.ErrBadHandleOrPassword
	}
	err := bcrypt.CompareHashAndPassword([]byte(*user.Password), []byte(password))
	if err != nil {
		return lib.ErrBadHandleOrPassword
	}
	return nil
}