package main

import (
	"path"

	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

// Manages the User Database
//
// Default location is 'data/users.db'
type UserManager struct {
	db *gorm.DB
}

func NewUserManager() (*UserManager, error) {
	var (
		um  *UserManager = &UserManager{}
		err error
	)
	um.db, err = gorm.Open(sqlite.Open(path.Join("data", "users.db")), &gorm.Config{})
	if err != nil {
		return nil, err
	}
	err = um.db.AutoMigrate(&User{})
	if err != nil {
		return nil, err
	}
	return um, err
}

func (um *UserManager) Close() error {
	sqldb, err := um.db.DB()
	if err != nil {
		return err
	}
	return sqldb.Close()
}

func (um *UserManager) FindByHandle(handle string) (*User, error) {
	var u *User
	tx := um.db.First(u, "handle = ?", handle)
	return u, tx.Error
}

func (um *UserManager) SaveUser(u *User) error {
	tx := um.db.Save(u)
	return tx.Error
}

func (um *UserManager) DeleteUser(u *User) error {
	tx := um.db.Delete(u)
	if tx.Error != nil {
		return tx.Error
	}
	u = nil
	return nil
}