package v1

import (
	"bytes"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"log"
	"net/http"
	"strings"
	"time"

	"github.com/google/go-querystring/query"
)

type Option func(*MgClient)

// OptionHTTPClient set custom http.Client for MgClient
func OptionHTTPClient(client *http.Client) func(*MgClient) {
	return func(c *MgClient) {
		c.httpClient = client
	}
}

// OptionLogger sets the provided logger instance into the MgClient
func OptionLogger(logger BasicLogger) func(*MgClient) {
	return func(c *MgClient) {
		c.logger = logger
	}
}

// OptionDebug enables debug mode for MgClient
func OptionDebug() func(*MgClient) {
	return func(c *MgClient) {
		c.Debug = true
	}
}

// New initialize client
func New(url string, token string, opts ...Option) *MgClient {
	c := &MgClient{
		URL:        url,
		Token:      token,
		httpClient: &http.Client{Timeout: time.Minute},
	}

	for _, opt := range opts {
		opt(c)
	}

	return c
}

// WithLogger sets the provided logger instance into the Client.
// Deprecated: Use functional option OptionLogger instead
func (c *MgClient) WithLogger(logger BasicLogger) *MgClient {
	c.logger = logger
	return c
}

// writeLog writes to the log.
func (c *MgClient) writeLog(format string, v ...interface{}) {
	if c.logger != nil {
		c.logger.Printf(format, v...)
		return
	}

	log.Printf(format, v...)
}

// Bots get all available bots
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.Bots()
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	for _, bot := range data {
// 		fmt.Printf("%v %v\n", bot.Name, bot.CreatedAt)
// 	}
func (c *MgClient) Bots(request BotsRequest) ([]BotsResponseItem, int, error) {
	var resp []BotsResponseItem
	var b []byte
	outgoing, _ := query.Values(request)

	data, status, err := c.GetRequest(fmt.Sprintf("/bots?%s", outgoing.Encode()), b)
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// Channels get all available channels
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.Channels()
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	for _, channel := range data {
// 		fmt.Printf("%v %v\n", channel.Type, channel.CreatedAt)
// 	}
func (c *MgClient) Channels(request ChannelsRequest) ([]ChannelResponseItem, int, error) {
	var resp []ChannelResponseItem
	var b []byte
	outgoing, _ := query.Values(request)

	data, status, err := c.GetRequest(fmt.Sprintf("/channels?%s", outgoing.Encode()), b)
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// Users get all available users
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.Users(UsersRequest:{Active:1})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	for _, user := range data {
// 		fmt.Printf("%v %v\n", user.FirstName, user.IsOnline)
// 	}
func (c *MgClient) Users(request UsersRequest) ([]UsersResponseItem, int, error) {
	var resp []UsersResponseItem
	var b []byte
	outgoing, _ := query.Values(request)

	data, status, err := c.GetRequest(fmt.Sprintf("/users?%s", outgoing.Encode()), b)
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// Customers get all available customers
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.Customers()
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	for _, customer := range data {
// 		fmt.Printf("%v %v\n", customer.FirstName, customer.Avatar)
// 	}
func (c *MgClient) Customers(request CustomersRequest) ([]CustomersResponseItem, int, error) {
	var resp []CustomersResponseItem
	var b []byte
	outgoing, _ := query.Values(request)

	data, status, err := c.GetRequest(fmt.Sprintf("/customers?%s", outgoing.Encode()), b)
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// Chats get all available chats
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.Chats(ChatsRequest{ChannelType:ChannelTypeWhatsapp})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	for _, chat := range data {
// 		fmt.Printf("%v %v\n", chat.Customer, chat.LastMessage)
// 	}
func (c *MgClient) Chats(request ChatsRequest) ([]ChatResponseItem, int, error) {
	var resp []ChatResponseItem
	var b []byte
	outgoing, _ := query.Values(request)

	data, status, err := c.GetRequest(fmt.Sprintf("/chats?%s", outgoing.Encode()), b)
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// Members get all available chat members
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.Members(MembersRequest{State:ChatMemberStateActive})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	for _, member := range data {
// 		fmt.Printf("%v\n", member.CreatedAt)
// 	}
func (c *MgClient) Members(request MembersRequest) ([]MemberResponseItem, int, error) {
	var resp []MemberResponseItem
	var b []byte
	outgoing, _ := query.Values(request)

	data, status, err := c.GetRequest(fmt.Sprintf("/members?%s", outgoing.Encode()), b)
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// Dialogs get all available dialogs
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.Dialogs(DialogsRequest{Active:1})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	for _, dialog := range data {
// 		fmt.Printf("%v %v\n", dialog.ChatID, dialog.CreatedAt)
// 	}
func (c *MgClient) Dialogs(request DialogsRequest) ([]DialogResponseItem, int, error) {
	var resp []DialogResponseItem
	var b []byte
	outgoing, _ := query.Values(request)

	data, status, err := c.GetRequest(fmt.Sprintf("/dialogs?%s", outgoing.Encode()), b)
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// DialogAssign allows to assign dialog to Bot or User
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.DialogAssign(DialogAssignRequest{DialogID: 1, UserID: 6})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	fmt.Printf("%v %v\n", data.Responsible, data.LeftUserID )
func (c *MgClient) DialogAssign(request DialogAssignRequest) (DialogAssignResponse, int, error) {
	var resp DialogAssignResponse
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.PatchRequest(fmt.Sprintf("/dialogs/%d/assign", request.DialogID), []byte(outgoing))
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// DialogUnassign allows to remove responsible from the dialogue
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.DialogUnassign(1)
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	fmt.Printf("%v\n", data.Responsible)
func (c *MgClient) DialogUnassign(dialogID uint64) (DialogUnassignResponse, int, error) {
	var resp DialogUnassignResponse

	data, status, err := c.PatchRequest(fmt.Sprintf("/dialogs/%d/unassign", dialogID), nil)
	if err != nil {
		return resp, status, err
	}

	if status != http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// DialogClose close selected dialog
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	_, status, err := client.DialogClose(123)
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
func (c *MgClient) DialogClose(request uint64) (map[string]interface{}, int, error) {
	var resp map[string]interface{}
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.DeleteRequest(fmt.Sprintf("/dialogs/%d/close", request), []byte(outgoing))
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// DialogsTagsAdd allows to assign dialog to Bot or User
//
// Example:
//
//	var client = v1.New("https://demo.url", "09jIJ")
//
//	data, status, err := client.DialogsTagsAdd(DialogTagsAddRequest{DialogID: uint64(1),Tags: []TagsAdd{{Name: "foo"}}})
func (c *MgClient) DialogsTagsAdd(request DialogTagsAddRequest) (int, error) {
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.PatchRequest(fmt.Sprintf("/dialogs/%d/tags/add", request.DialogID), outgoing)
	if err != nil {
		return status, err
	}

	if status != http.StatusOK {
		return status, c.Error(data)
	}

	return status, err
}

// DialogTagsDelete allows to assign dialog to Bot or User
//
// Example:
//
//	var client = v1.New("https://demo.url", "09jIJ")
//
//	data, status, err := client.DialogsTagsAdd(DialogTagsDelete{DialogID: uint64(1),Tags: []TagsDelete{{Name: "foo"}}})
func (c *MgClient) DialogTagsDelete(request DialogTagsDeleteRequest) (int, error) {
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.PatchRequest(fmt.Sprintf("/dialogs/%d/tags/delete", request.DialogID), outgoing)
	if err != nil {
		return status, err
	}

	if status != http.StatusOK {
		return status, c.Error(data)
	}

	return status, err
}

// Messages get all available messages
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.Messages(MessagesRequest{UserID:5})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	for _, message := range data {
// 		fmt.Printf("%v %v %v\n", message.ChatID, message.CreatedAt, message.CustomerID)
// 	}
func (c *MgClient) Messages(request MessagesRequest) ([]MessagesResponseItem, int, error) {
	var resp []MessagesResponseItem
	var b []byte
	outgoing, _ := query.Values(request)

	data, status, err := c.GetRequest(fmt.Sprintf("/messages?%s", outgoing.Encode()), b)
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// MessageSend send message
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.MessageSend(MessageSendRequest{
// 		Scope:   "public",
// 		Content: "test",
// 		ChatID:  i,
// 	})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// fmt.Printf("%v \n", data.MessageID, data.Time)
func (c *MgClient) MessageSend(request MessageSendRequest) (MessageSendResponse, int, error) {
	var resp MessageSendResponse
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.PostRequest("/messages", bytes.NewBuffer(outgoing))
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// MessageEdit update selected message
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	_, status, err := client.MessageEdit(MessageEditRequest{
// 		ID:      123,
// 		Content: "test",
// 	})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
func (c *MgClient) MessageEdit(request MessageEditRequest) (map[string]interface{}, int, error) {
	var resp map[string]interface{}
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.PatchRequest(fmt.Sprintf("/messages/%d", request.ID), []byte(outgoing))
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// MessageDelete delete selected message
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	_, status, err := client.MessageDelete(123)
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
func (c *MgClient) MessageDelete(request uint64) (map[string]interface{}, int, error) {
	var resp map[string]interface{}
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.DeleteRequest(fmt.Sprintf("/messages/%d", request), []byte(outgoing))
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// Info updates bot information
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	_, status, err := client.Info(InfoRequest{Name: "AWESOME", Avatar: "https://example.com/logo.svg"})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
func (c *MgClient) Info(request InfoRequest) (map[string]interface{}, int, error) {
	var resp map[string]interface{}
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.PatchRequest("/my/info", []byte(outgoing))
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// Commands get all available commands for bot
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.Commands()
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	for _, command := range data {
// 		fmt.Printf("%v %v\n", command.Name, command.Description)
// 	}
func (c *MgClient) Commands(request CommandsRequest) ([]CommandsResponseItem, int, error) {
	var resp []CommandsResponseItem
	var b []byte
	outgoing, _ := query.Values(request)

	data, status, err := c.GetRequest(fmt.Sprintf("/my/commands?%s", outgoing.Encode()), b)
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// CommandEdit create or change command for bot
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	data, status, err := client.CommandEdit(CommandEditRequest{
// 		BotID:       1,
// 		Name:        "show_payment_types",
// 		Description: "Get available payment types",
// 	})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
//
// 	fmt.Printf("%v %v\n", data.Name, data.Description)
func (c *MgClient) CommandEdit(request CommandEditRequest) (CommandsResponseItem, int, error) {
	var resp CommandsResponseItem
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.PutRequest(fmt.Sprintf("/my/commands/%s", request.Name), []byte(outgoing))
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// CommandDelete delete selected command for bot
//
// Example:
//
// 	var client = v1.New("https://demo.url", "09jIJ")
//
// 	_, status, err := client.CommandDelete(show_payment_types)
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
// 	if status >= http.StatusBadRequest {
// 		fmt.Printf("%v", err)
// 	}
func (c *MgClient) CommandDelete(request string) (map[string]interface{}, int, error) {
	var resp map[string]interface{}
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.DeleteRequest(fmt.Sprintf("/my/commands/%s", request), []byte(outgoing))
	if err != nil {
		return resp, status, err
	}

	if status > http.StatusCreated || status < http.StatusOK {
		return resp, status, c.Error(data)
	}

	if err := json.Unmarshal(data, &resp); err != nil {
		return resp, status, err
	}

	return resp, status, err
}

// GetFile implement get file url
//
// Example:
//
// 	var client = v1.New("https://token.url", "cb8ccf05e38a47543ad8477d4999be73bff503ea6")
//
// 	data, status, err := client.GetFile("file_ID")
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
//	fmt.Printf("%s\n", data.ID)
func (c *MgClient) GetFile(request string) (FullFileResponse, int, error) {
	var resp FullFileResponse
	var b []byte

	data, status, err := c.GetRequest(fmt.Sprintf("/files/%s", request), b)

	if err != nil {
		return resp, status, err
	}

	if status != http.StatusOK {
		return resp, status, c.Error(data)
	}

	if e := json.Unmarshal(data, &resp); e != nil {
		return resp, status, e
	}

	return resp, status, err
}

// UploadFile upload file
//
// Example:
//
//	resp, err := http.Get("https://via.placeholder.com/300")
//	if err != nil {
//		fmt.Printf("%v", err)
//	}
//
//	defer resp.Body.Close()
//
// 	var client = v1.New("https://token.url", "cb8ccf05e38a47543ad8477d4999be73bff503ea6")
//
// 	data, status, err := client.UploadFile(resp.Body)
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
//	fmt.Printf("%s\n%s", data.ID, status)
func (c *MgClient) UploadFile(request io.Reader) (UploadFileResponse, int, error) {
	var resp UploadFileResponse

	data, status, err := c.PostRequest("/files/upload", request)
	if err != nil {
		return resp, status, err
	}

	if status != http.StatusOK {
		return resp, status, c.Error(data)
	}

	if e := json.Unmarshal(data, &resp); e != nil {
		return resp, status, e
	}

	return resp, status, err
}

// UploadFileByURL upload file by url
//
// Example:
//
// 	uploadFileResponse, st, err := c.UploadFileByURL(UploadFileByUrlRequest{
// 		Url: "https://via.placeholder.com/300",
// 	})
//
// 	if err != nil {
// 		fmt.Printf("%v", err)
// 	}
//
//	fmt.Printf("%s\n%s", uploadFileResponse.ID, status)
func (c *MgClient) UploadFileByURL(request UploadFileByUrlRequest) (UploadFileResponse, int, error) {
	var resp UploadFileResponse
	outgoing, _ := json.Marshal(&request)

	data, status, err := c.PostRequest("/files/upload_by_url", bytes.NewBuffer(outgoing))
	if err != nil {
		return resp, status, err
	}

	if status != http.StatusOK {
		return resp, status, c.Error(data)
	}

	if e := json.Unmarshal(data, &resp); e != nil {
		return resp, status, e
	}

	return resp, status, err
}

// UpdateFileMetadata update file metadata
//
// Example:
//
//	response, status, err := c.UpdateFileMetadata(UploadFileByUrlRequest{
//		ID:  "e038aa39-2338-4285-be86-e2a0bb424daa"
//		Transcription: "demo transcription",
//	})
//
//	if err != nil {
//		fmt.Printf("%v", err)
//	}
//
//	fmt.Printf("%s\n%s", response.ID, status)
func (c *MgClient) UpdateFileMetadata(request UpdateFileMetadataRequest) (UploadFileResponse, int, error) {
	var resp UploadFileResponse
	outgoing, err := json.Marshal(&request)
	if err != nil {
		return resp, 0, err
	}

	data, status, err := c.PutRequest(fmt.Sprintf("/files/%s/meta", request.ID), outgoing)
	if err != nil {
		return resp, status, err
	}

	if status != http.StatusOK {
		return resp, status, c.Error(data)
	}

	if e := json.Unmarshal(data, &resp); e != nil {
		return resp, status, e
	}

	return resp, status, err
}

type wsParams struct {
	options []string
}

type WsParams interface {
	apply(*wsParams)
}

func (c WsOption) apply(opts *wsParams) {
	opts.options = append(opts.options, string(c))
}

// WsMeta let you receive url & headers to open web socket connection
func (c *MgClient) WsMeta(events []string, urlParams ...WsParams) (string, http.Header, error) {
	var url string

	if len(events) < 1 {
		err := errors.New("events list must not be empty")
		return url, nil, err
	}

	url = fmt.Sprintf("%s%s%s%s", strings.Replace(c.URL, "https", "wss", 1), prefix, "/ws?events=", strings.Join(events[:], ","))

	var params wsParams
	for _, param := range urlParams {
		param.apply(&params)
	}
	if len(params.options) > 0 {
		url = fmt.Sprintf("%s&options=%s", url, strings.Join(params.options, ","))
	}

	if url == "" {
		err := errors.New("empty WS URL")
		return url, nil, err
	}

	headers := http.Header{}
	headers.Add("x-bot-token", c.Token)

	return url, headers, nil
}

func (c *MgClient) Error(info []byte) error {
	var data map[string]interface{}

	if err := json.Unmarshal(info, &data); err != nil {
		return err
	}

	values := data["errors"].([]interface{})

	return errors.New(values[0].(string))
}