server

type Account interface {
	Credentials() (Credentials, error)
	Resources() ([]*Resource, error)
}

type Credential struct {
	CredentialName  string      `json:"credential_name"`
	CredentialValue interface{} `json:"credential_value"` // string, int, bool, []string, []int only
}

type Credentials interface {
	// Customer() returns the customer-oriented information.
	// interface{} types should be in string/number/bool/[]string/[]number
	Customer() []*Credential

	// Provider() returns the provider-oriented information.
	// interface{} types should be in string/number/bool/[]string/[]number
	Admin() []*Credential
}

type ProvisioningServer interface {
	// CreateAccount() utilizes internal server configuration and aconf pased in to create a series of accounts with
	// same sconf and variable aconf in order.
	CreateAccount(productSN uint64, accountConfiguration interface{}) error

	// ReadAccount() returns an ServerAccount-compatible struct
	GetAccount(productSN uint64) (Account, error)

	// UpdateAccount() utilizes internal server configuration and aconf pased in to update a series of accounts
	// specified by productSN.
	UpdateAccount(productSN uint64, accountConfiguration interface{}) error

	// DeleteAccount() utilizes internal server configuration to delete a series of accounts specified by accID.
	DeleteAccount(productSN uint64) error

	// Temporarily disable an account from being used or recover it
	SuspendAccount(productSN uint64) error
	UnsuspendAccount(productSN uint64) error

	// Monthly Refresh Usage
	RefreshAccount(productSN uint64) error
}

type ProvisioningServerGen func(instanceID string, serverConfiguration interface{}) (ProvisioningServer, error)

type Resource struct {
	ResourceID uint64  `json:"resource_id"` // enums should be saved somewhere in the database
	Allocated  float64 `json:"allocated"`
	Used       float64 `json:"used"`
	Free       float64 `json:"free"`
}