package models

import (
	"errors"
	"fmt"
	"strings"

	"git.kirsle.net/apps/gophertype/pkg/constants"
	"github.com/jinzhu/gorm"
	"golang.org/x/crypto/bcrypt"
)

// User account for the site.
type User struct {
	gorm.Model
	Username       string `json:"username" gorm:"unique_index"`
	HashedPassword string `json:"-"`
	IsAdmin        bool   `json:"isAdmin" gorm:"index"`
	Name           string `json:"name"`
	Email          string `json:"email" gorm:"index"`
}

// Validate the User object has everything filled in. Fixes what it can,
// returns an error if something is wrong. Ensures the HashedPassword is hashed.
func (u *User) Validate() error {
	u.Username = strings.TrimSpace(strings.ToLower(u.Username))
	u.Name = strings.TrimSpace(strings.ToLower(u.Name))

	// Defaults
	if len(u.Name) == 0 {
		u.Name = u.Username
	}

	if len(u.Username) == 0 {
		return errors.New("username is required")
	}
	return nil
}

// SetPassword stores the hashed password for a user.
func (u *User) SetPassword(password string) error {
	hash, err := bcrypt.GenerateFromPassword([]byte(password), constants.BcryptCost)
	if err != nil {
		return fmt.Errorf("SetPassword: %s", err)
	}

	u.HashedPassword = string(hash)
	fmt.Printf("Set hashed password: %s", u.HashedPassword)
	return nil
}

// FirstAdmin returns the admin user with the lowest ID number.
func FirstAdmin() (User, error) {
	var user User
	r := DB.First(&user, "is_admin", true)
	return user, r.Error
}

// CreateUser adds a new user to the database.
func CreateUser(u User) error {
	if err := u.Validate(); err != nil {
		return err
	}

	r := DB.Create(&u)
	return r.Error
}