package viettelffm

import (
	"errors"
	"fmt"
	"net/http"
	"net/url"
	"time"

	"git.selly.red/Selly-Modules/natsio"
	"git.selly.red/Selly-Modules/natsio/model"
	"git.selly.red/Selly-Modules/natsio/subject"

	tpl "git.selly.red/Selly-Modules/3pl"
	"git.selly.red/Selly-Modules/3pl/util/httputil"
	"git.selly.red/Selly-Modules/3pl/util/pjson"
)

const (
	baseURLStag     = "https://stg-gw.viettelpost.vn"
	baseURLAuthStag = "https://stg-keycloak.viettelpost.vn"

	// TODO: update prod url
	baseURLProd     = ""
	baseURLAuthProd = ""

	pathAuth                 = "/realms/wms/protocol/openid-connect/token"
	pathUpdateORLogisticInfo = "/wms-core/api/v1/obms/outbound-request/outbound-request-partner/%s/bill"
	pathCreateOR             = "/wms-core/api/v1/obms/outbound-request/outbound-request-partner/hab"
	pathCancelOR             = "/wms-core/api/v1/obms/outbound-request/cancel"

	logTarget = "viettel-ffm"
)

var (
	baseURLENVMapping = map[tpl.ENV]string{
		tpl.EnvProd:    baseURLProd,
		tpl.EnvStaging: baseURLStag,
	}
)

type Client struct {
	env      tpl.ENV
	username string
	password string

	natsClient          natsio.Server
	authInfo            *AuthRes
	authTokenExpireTime time.Time
}

// NewClient generate OnPoint client
func NewClient(env tpl.ENV, user, pwd string, nc natsio.Server) (*Client, error) {
	if user == "" || pwd == "" {
		return nil, errors.New("viettelffm: cannot init with empty api key")
	}
	return &Client{
		env:        env,
		username:   user,
		password:   pwd,
		natsClient: nc,
	}, nil
}

func (c *Client) CreateOR(p ORPayload) (*ORResult, error) {
	apiURL := c.getBaseURL() + pathCreateOR
	token, err := c.getToken()
	if err != nil {
		return nil, err
	}
	natsPayload := model.CommunicationRequestHttp{
		ResponseImmediately: true,
		Payload: model.HttpRequest{
			URL:    apiURL,
			Method: http.MethodPost,
			Data:   pjson.ToJSONString(p),
			Header: map[string]string{
				httputil.HeaderKeyAuthorization: fmt.Sprintf("Bearer %s", token),
				httputil.HeaderKeyContentType:   httputil.HeaderValueApplicationJSON,
			},
		},
		LogTarget: logTarget,
	}
	r, err := c.requestHttpViaNats(natsPayload)
	if err != nil {
		return nil, fmt.Errorf("viettelffm.Client.CreateOR - requestHttpViaNats %v", err)
	}

	res := r.Response
	if res.StatusCode >= http.StatusBadRequest {
		return nil, fmt.Errorf("viettelffm.Client.CreateOR - requestHttpViaNats %s", res.Body)
	}
	var data ORResult
	if err = r.ParseResponseData(&data); err != nil {
		return nil, fmt.Errorf("viettelffm.Client.CreateOR - requestHttpViaNats parse response %v, %s", err, res.Body)
	}
	return &data, nil
}

func (c *Client) UpdateORLogisticInfo(p UpdateLogisticInfoPayload) error {
	apiURL := c.getBaseURL() + pathUpdateORLogisticInfo
	token, err := c.getToken()
	if err != nil {
		return err
	}
	natsPayload := model.CommunicationRequestHttp{
		ResponseImmediately: true,
		Payload: model.HttpRequest{
			URL:    apiURL,
			Method: http.MethodPut,
			Data:   pjson.ToJSONString(p),
			Header: map[string]string{
				httputil.HeaderKeyAuthorization: fmt.Sprintf("Bearer %s", token),
				httputil.HeaderKeyContentType:   httputil.HeaderValueApplicationJSON,
			},
		},
		LogTarget: logTarget,
	}
	r, err := c.requestHttpViaNats(natsPayload)
	if err != nil {
		return err
	}
	res := r.Response
	if res.StatusCode >= http.StatusBadRequest {
		return fmt.Errorf("viettelffm.Client.UpdateOutboundRequestLogisticInfo - requestHttpViaNats %s", res.Body)
	}
	return nil
}

func (c *Client) CancelOR(p CancelORPayload) error {
	apiURL := c.getBaseURL() + pathCancelOR
	token, err := c.getToken()
	if err != nil {
		return err
	}
	natsPayload := model.CommunicationRequestHttp{
		ResponseImmediately: true,
		Payload: model.HttpRequest{
			URL:    apiURL,
			Method: http.MethodPost,
			Data:   pjson.ToJSONString(p),
			Header: map[string]string{
				httputil.HeaderKeyAuthorization: fmt.Sprintf("Bearer %s", token),
				httputil.HeaderKeyContentType:   httputil.HeaderValueApplicationJSON,
			},
		},
		LogTarget: logTarget,
	}
	r, err := c.requestHttpViaNats(natsPayload)
	if err != nil {
		return err
	}
	res := r.Response
	if res.StatusCode >= http.StatusBadRequest {
		return fmt.Errorf("viettelffm.Client.CancelOR - requestHttpViaNats %s", res.Body)
	}
	return nil
}

// Auth ...
func (c *Client) Auth() (*AuthRes, error) {
	v := url.Values{}
	v.Set("username", c.username)
	v.Set("password", c.password)
	v.Set("grant_type", "password")
	v.Set("client_id", "wms_account")
	b := v.Encode()
	header := map[string]string{
		httputil.HeaderKeyContentType: httputil.HeaderValueApplicationURLEncoded,
	}
	bURL := baseURLAuthStag
	if c.env == tpl.EnvProd {
		bURL = baseURLAuthProd
	}
	api := bURL + pathAuth
	natsPayload := model.CommunicationRequestHttp{
		ResponseImmediately: true,
		Payload: model.HttpRequest{
			URL:    api,
			Method: http.MethodPost,
			Data:   b,
			Header: header,
		},
		LogTarget: logTarget,
	}
	r, err := c.requestHttpViaNats(natsPayload)
	if err != nil {
		return nil, fmt.Errorf("viettelffm.Client.Auth - requestHttpViaNats: payload %+v, err %v\n", natsPayload, err)
	}

	res := r.Response
	if res.StatusCode >= http.StatusBadRequest {
		return nil, fmt.Errorf("viettelffm.Client.Auth - requestHttpViaNats %s", res.Body)
	}
	var data AuthRes
	if err = r.ParseResponseData(&data); err != nil {
		return nil, fmt.Errorf("viettelffm.Client.Auth - requestHttpViaNats parse response %v, %s", err, res.Body)
	}
	return &data, nil
}

func (c *Client) getToken() (string, error) {
	if c.authInfo == nil || time.Now().After(c.authTokenExpireTime) {
		auth, err := c.Auth()
		if err != nil {
			return "", err
		}
		c.authInfo = auth
		c.authTokenExpireTime = time.Now().Add(time.Duration(auth.ExpiresIn) * time.Second).Add(-time.Minute)
	}
	return c.authInfo.AccessToken, nil
}

func (c *Client) getBaseURL() string {
	return baseURLENVMapping[c.env]
}

func (c *Client) requestHttpViaNats(data model.CommunicationRequestHttp) (*model.CommunicationHttpResponse, error) {
	b := pjson.ToBytes(data)
	msg, err := c.natsClient.Request(subject.Communication.RequestHTTP, b)
	if err != nil {
		return nil, fmt.Errorf("viettelffm.Client.requestHttpViaNats err: %v, url %s", err, data.Payload.URL)
	}
	var r model.CommunicationHttpResponse
	if err = pjson.Unmarshal(msg.Data, &r); err != nil {
		return nil, fmt.Errorf("viettelffm.Client.requestHttpViaNats parse data err: %v, url %s, data %s", err, data.Payload.URL, string(msg.Data))
	}
	if r.Response == nil {
		return nil, fmt.Errorf("viettelffm.Client.requestHttpViaNats empty reponse")
	}
	return &r, nil
}