package db

import "log"

func CreateUser(name string, passhash string, email string, displayName string) error {
	user := User{
		Name:        name,
		PassHash:    passhash,
		Email:       email,
		DisplayName: displayName,
	}
	result := conn.Create(&user)
	if result.Error != nil {
		log.Printf("Could not add user %s: %v", name, result.Error)
		return result.Error
	} else {
		log.Printf("Created User %s", name)
		return nil
	}
}

func AddUserToGroup(username string, groupname string) error {
	user, err := GetUserByName(username)
	if err != nil {
		return err
	}
	group, err := GetGroupByName(groupname)
	if err != nil {
		return err
	}

	result := conn.Where("name = ?", groupname).First(&user)
	if result.Error != nil {
		log.Printf("Could find user %s: %v", username, result.Error)
		return result.Error
	}

	err = conn.Model(&user).Association("Groups").Append(&group)

	if err != nil {
		log.Printf("Could add user %s to group %s: %v", username, groupname, result.Error)
		return result.Error
	} else {
		log.Printf("Added user %s to Group %s", username, groupname)
		return nil
	}

}

func DeleteUserFromGroup(username string, groupname string) error {
	user, err := GetUserByName(username)
	if err != nil {
		return err
	}
	group, err := GetGroupByName(groupname)
	if err != nil {
		return err
	}

	result := conn.Where("name = ?", groupname).First(&user)
	if result.Error != nil {
		log.Printf("Could find user %s: %v", username, result.Error)
		return result.Error
	}

	err = conn.Model(&user).Association("Groups").Delete(&group)

	if err != nil {
		log.Printf("Could delete user %s from group %s: %v", username, groupname, result.Error)
		return result.Error
	} else {
		log.Printf("Deleted user %s from group %s", username, groupname)
		return nil
	}

}

func GetUserByName(name string) (User, error) {
	var user User
	user.Name = name
	result := conn.Where("name = ?", name).First(&user)
	if result.Error != nil {
		log.Printf("Could find user %s: %v", name, result.Error)
		return user, result.Error
	} else {
		log.Printf("retrieved user %s", name)
		return user, nil
	}
}

func GetUserByID(id int) (User, error) {
	var group User
	result := conn.Where("id = ?", id).First(&group)
	if result.Error != nil {
		log.Printf("Could find group %d: %v", id, result.Error)
		return group, result.Error
	} else {
		log.Printf("retrieved group %d", id)
		return group, nil
	}
}

func GetAllUsers() ([]User, error) {
	var user []User
	result := conn.Find(&user)
	if result.Error != nil {
		log.Printf("Could find roles: %v", result.Error)
		return user, result.Error
	} else {
		return user, nil
	}
}

func SetUserName(user User, name string) error {
	user.Name = name
	result := conn.Save(&user)
	if result.Error != nil {
		log.Printf("Could find user %s: %v", name, result.Error)
		return result.Error
	} else {
		log.Printf("retrieved user %s", name)
		return nil
	}

}

func SetUserDisplayName(user User, name string) error {
	user.DisplayName = name
	result := conn.Save(&user)
	if result.Error != nil {
		log.Printf("Could find user %s: %v", name, result.Error)
		return result.Error
	} else {
		log.Printf("retrieved user %s", name)
		return nil
	}

}

func SetUserPassHash(user User, hash string) error {
	user.PassHash = hash
	result := conn.Save(&user)
	if result.Error != nil {
		log.Printf("Could find user %s: %v", hash, result.Error)
		return result.Error
	} else {
		log.Printf("retrieved user %s", hash)
		return nil
	}
}

func SetUserEmail(user User, email string) error {
	user.Email = email
	result := conn.Save(&user)
	if result.Error != nil {
		log.Printf("Could find user %s: %v", email, result.Error)
		return result.Error
	} else {
		log.Printf("retrieved user %s", email)
		return nil
	}
}

func DeleteUser(user User) error {
	result := conn.First(&user).Delete(&user)
	if result.Error != nil {
		log.Printf("Could find user %d: %v", user.ID, result.Error)
		return result.Error
	} else {
		log.Printf("deleted user %d", user.ID)
		return nil
	}
}