package packngo

import "fmt"

const deviceBasePath = "/devices"

// DeviceService interface defines available device methods
type DeviceService interface {
	List(ProjectID string) ([]Device, *Response, error)
	Get(string) (*Device, *Response, error)
	Create(*DeviceCreateRequest) (*Device, *Response, error)
	Delete(string) (*Response, error)
	Reboot(string) (*Response, error)
	PowerOff(string) (*Response, error)
	PowerOn(string) (*Response, error)
	Lock(string) (*Response, error)
	Unlock(string) (*Response, error)
}

type devicesRoot struct {
	Devices []Device `json:"devices"`
}

// Device represents a Packet device
type Device struct {
	ID           string       `json:"id"`
	Href         string       `json:"href,omitempty"`
	Hostname     string       `json:"hostname,omitempty"`
	State        string       `json:"state,omitempty"`
	Created      string       `json:"created_at,omitempty"`
	Updated      string       `json:"updated_at,omitempty"`
	Locked       bool         `json:"locked,omitempty"`
	BillingCycle string       `json:"billing_cycle,omitempty"`
	Tags         []string     `json:"tags,omitempty"`
	Network      []*IPAddress `json:"ip_addresses"`
	OS           *OS          `json:"operating_system,omitempty"`
	Plan         *Plan        `json:"plan,omitempty"`
	Facility     *Facility    `json:"facility,omitempty"`
	Project      *Project     `json:"project,omitempty"`
	ProvisionPer float32      `json:"provisioning_percentage,omitempty"`
}

func (d Device) String() string {
	return Stringify(d)
}

// DeviceCreateRequest type used to create a Packet device
type DeviceCreateRequest struct {
	HostName     string   `json:"hostname"`
	Plan         string   `json:"plan"`
	Facility     string   `json:"facility"`
	OS           string   `json:"operating_system"`
	BillingCycle string   `json:"billing_cycle"`
	ProjectID    string   `json:"project_id"`
	UserData     string   `json:"userdata"`
	Tags         []string `json:"tags"`
}

func (d DeviceCreateRequest) String() string {
	return Stringify(d)
}

// DeviceActionRequest type used to execute actions on devices
type DeviceActionRequest struct {
	Type string `json:"type"`
}

func (d DeviceActionRequest) String() string {
	return Stringify(d)
}

// DeviceServiceOp implements DeviceService
type DeviceServiceOp struct {
	client *Client
}

// List returns devices on a project
func (s *DeviceServiceOp) List(projectID string) ([]Device, *Response, error) {
	path := fmt.Sprintf("%s/%s/devices?include=facility", projectBasePath, projectID)

	req, err := s.client.NewRequest("GET", path, nil)
	if err != nil {
		return nil, nil, err
	}

	root := new(devicesRoot)
	resp, err := s.client.Do(req, root)
	if err != nil {
		return nil, resp, err
	}

	return root.Devices, resp, err
}

// Get returns a device by id
func (s *DeviceServiceOp) Get(deviceID string) (*Device, *Response, error) {
	path := fmt.Sprintf("%s/%s?include=facility", deviceBasePath, deviceID)

	req, err := s.client.NewRequest("GET", path, nil)
	if err != nil {
		return nil, nil, err
	}

	device := new(Device)
	resp, err := s.client.Do(req, device)
	if err != nil {
		return nil, resp, err
	}

	return device, resp, err
}

// Create creates a new device
func (s *DeviceServiceOp) Create(createRequest *DeviceCreateRequest) (*Device, *Response, error) {
	path := fmt.Sprintf("%s/%s/devices", projectBasePath, createRequest.ProjectID)

	req, err := s.client.NewRequest("POST", path, createRequest)
	if err != nil {
		return nil, nil, err
	}

	device := new(Device)
	resp, err := s.client.Do(req, device)
	if err != nil {
		return nil, resp, err
	}

	return device, resp, err
}

// Delete deletes a device
func (s *DeviceServiceOp) Delete(deviceID string) (*Response, error) {
	path := fmt.Sprintf("%s/%s", deviceBasePath, deviceID)

	req, err := s.client.NewRequest("DELETE", path, nil)
	if err != nil {
		return nil, err
	}

	resp, err := s.client.Do(req, nil)

	return resp, err
}

// Reboot reboots on a device
func (s *DeviceServiceOp) Reboot(deviceID string) (*Response, error) {
	path := fmt.Sprintf("%s/%s/actions", deviceBasePath, deviceID)

	action := &DeviceActionRequest{Type: "reboot"}
	req, err := s.client.NewRequest("POST", path, action)
	if err != nil {
		return nil, err
	}

	resp, err := s.client.Do(req, nil)

	return resp, err
}

// PowerOff powers on a device
func (s *DeviceServiceOp) PowerOff(deviceID string) (*Response, error) {
	path := fmt.Sprintf("%s/%s/actions", deviceBasePath, deviceID)

	action := &DeviceActionRequest{Type: "power_off"}
	req, err := s.client.NewRequest("POST", path, action)
	if err != nil {
		return nil, err
	}

	resp, err := s.client.Do(req, nil)

	return resp, err
}

// PowerOn powers on a device
func (s *DeviceServiceOp) PowerOn(deviceID string) (*Response, error) {
	path := fmt.Sprintf("%s/%s/actions", deviceBasePath, deviceID)

	action := &DeviceActionRequest{Type: "power_on"}
	req, err := s.client.NewRequest("POST", path, action)
	if err != nil {
		return nil, err
	}

	resp, err := s.client.Do(req, nil)

	return resp, err
}

type lockDeviceType struct {
	Locked bool `json:"locked"`
}

// Lock sets a device to "locked"
func (s *DeviceServiceOp) Lock(deviceID string) (*Response, error) {
	path := fmt.Sprintf("%s/%s", deviceBasePath, deviceID)

	action := lockDeviceType{Locked: true}
	req, err := s.client.NewRequest("PATCH", path, action)
	if err != nil {
		return nil, err
	}

	resp, err := s.client.Do(req, nil)

	return resp, err

}

// Unlock sets a device to "locked"
func (s *DeviceServiceOp) Unlock(deviceID string) (*Response, error) {
	path := fmt.Sprintf("%s/%s", deviceBasePath, deviceID)

	action := lockDeviceType{Locked: false}
	req, err := s.client.NewRequest("PATCH", path, action)
	if err != nil {
		return nil, err
	}

	resp, err := s.client.Do(req, nil)

	return resp, err
}