package ipmi

import "fmt"

// 20.7 Get ACPI Power State Command
type GetACPIPowerStateRequest struct {
	// empty
}

type GetACPIPowerStateResponse struct {
	SystemPowerState SystemPowerState
	DevicePowerState DevicePowerState
}

func (req *GetACPIPowerStateRequest) Pack() []byte {
	return nil
}

func (req *GetACPIPowerStateRequest) Command() Command {
	return CommandGetACPIPowerState
}

func (res *GetACPIPowerStateResponse) CompletionCodes() map[uint8]string {
	return map[uint8]string{}
}

func (res *GetACPIPowerStateResponse) Unpack(msg []byte) error {
	if len(msg) < 2 {
		return ErrUnpackedDataTooShortWith(len(msg), 2)
	}

	b1, _, _ := unpackUint8(msg, 0)
	res.SystemPowerState = SystemPowerState(b1 & 0x7f)
	b2, _, _ := unpackUint8(msg, 1)
	res.DevicePowerState = DevicePowerState(b2 & 0x7f)
	return nil
}

func (res *GetACPIPowerStateResponse) Format() string {
	return fmt.Sprintf(`ACPI System Power State: %s
ACPI Device Power State: %s`,
		res.SystemPowerState,
		res.DevicePowerState,
	)
}

// This command is provided to allow system software to tell a controller the present ACPI power state of the system.
func (c *Client) GetACPIPowerState() (response *GetACPIPowerStateResponse, err error) {
	request := &GetACPIPowerStateRequest{}
	response = &GetACPIPowerStateResponse{}
	err = c.Exchange(request, response)
	return
}