package arlo

import (
	"context"
	"fmt"
	"sync"
	"time"

	"github.com/go-resty/resty/v2"
)

type Arlo struct {
	user         string
	pass         string
	client       *resty.Client
	Account      Account
	Basestations Basestations
	Cameras      Cameras
	rwmutex      sync.RWMutex
}

func NewArlo() (arlo *Arlo) {

	c := resty.New().
		SetHostURL(BaseUrl).
		SetTimeout(30 * time.Second)

	return &Arlo{
		client: c,
	}
}

func (a *Arlo) get(url string, result interface{}) error {
	var errorResponse ErrorResponse
	resp, err := a.client.R().
		SetResult(result).
		SetError(&errorResponse).
		Get(url)
	if err != nil {
		return err
	}
	if resp.IsError() {
		return fmt.Errorf(errorResponse.Reason)
	}
	return nil
}

func (a *Arlo) post(url string, body interface{}, result interface{}, xcloudId string) error {
	var errorResponse ErrorResponse
	request := a.client.R().
		SetBody(body).
		SetResult(result).
		SetError(&errorResponse)
	if xcloudId != "" {
		request.SetHeader("xcloudId", xcloudId)
	}
	resp, err := request.Post(url)
	if err != nil {
		return err
	}
	if resp.IsError() {
		return fmt.Errorf(errorResponse.Reason)
	}
	return nil
}

func (a *Arlo) put(url string, result interface{}, xcloudId string) error {
	var errorResponse ErrorResponse
	request := a.client.R().
		SetResult(result).
		SetError(&errorResponse)
	if xcloudId != "" {
		request.SetHeader("xcloudId", xcloudId)
	}
	resp, err := request.Put(url)
	if err != nil {
		return err
	}
	if resp.IsError() {
		return fmt.Errorf(errorResponse.Reason)
	}
	return nil
}

func (a *Arlo) Login(ctx context.Context, user string, pass string) error {
	var loginResponse LoginResponse
	err := a.post(LoginV2Uri, map[string]string{
		"email":    user,
		"password": pass,
	}, &loginResponse, "")
	if err != nil {
		return fmt.Errorf("posting login request: %v", err)
	}
	if !loginResponse.Success {
		return fmt.Errorf("no success but no error")
	}
	a.client.SetHeader("Authorization", loginResponse.Data.Token)
	a.Account = loginResponse.Data
	if _, err := a.GetDevices(ctx); err != nil {
		return fmt.Errorf("getting devices: %v", err)
	}
	return nil
}

func (a *Arlo) Logout() error {

	var response BaseResponse
	err := a.put(LogoutUri, &response, "")
	if err != nil {
		return err
	}
	if !response.Success {
		return fmt.Errorf("no success but no error")
	}
	return nil
}

func (a *Arlo) GetSession() (*Session, error) {
	var response SessionResponse
	err := a.get(SessionUri, &response)
	if err != nil {
		return nil, err
	}
	if !response.Success {
		return nil, fmt.Errorf("no success but no error")
	}
	return &response.Data, nil
}

func (a *Arlo) GetDevices(ctx context.Context) (*Devices, error) {
	var response DeviceResponse
	err := a.get(fmt.Sprintf(DevicesUri, time.Now().Format("20060102")), &response)
	if err != nil {
		return nil, err
	}
	if !response.Success {
		return nil, fmt.Errorf("no success but no error")
	}
	if len(response.Data) == 0 {
		return nil, fmt.Errorf("no device found")
	}

	// Cache a pointer to the arlo object with each device.
	for i := range response.Data {
		response.Data[i].arlo = a
	}

	// Disconnect all of the basestations from the EventStream.
	for _, basestation := range a.Basestations {
		if err := basestation.Disconnect(); err != nil {
			return nil, fmt.Errorf("disconnecting device %s: %v", basestation.DeviceName, err)
		}
	}

	a.rwmutex.Lock()
	// Cache the devices as their respective types.
	a.Cameras = response.Data.GetCameras()
	a.Basestations = response.Data.GetBasestations()
	a.rwmutex.Unlock()

	// subscribe each basestation to the EventStream.
	for _, basestation := range a.Basestations {
		if err := basestation.Subscribe(ctx); err != nil {
			return nil, fmt.Errorf("subscribing device %s: %v", basestation.DeviceName, err)
		}
	}
	return &response.Data, nil
}

// GetProfile returns the user profile for the currently logged in user.
func (a *Arlo) GetProfile() (*UserProfile, error) {
	var response UserProfileResponse
	err := a.get(ProfileUri, &response)
	if err != nil {
		return nil, err
	}
	if !response.Success {
		return nil, fmt.Errorf("no success but no error")
	}
	return &response.Data, nil
}