package telegram

import (
	"errors"
	"fmt"
	"github.com/gofiber/fiber/v2"
	"github.com/rs/xid"
	"path/filepath"
	"penahub.gitlab.yandexcloud.net/backend/quiz/common.git/dal"
	"penahub.gitlab.yandexcloud.net/backend/quiz/common.git/model"
	"penahub.gitlab.yandexcloud.net/backend/quiz/common.git/pj_errors"
	"penahub.gitlab.yandexcloud.net/backend/quiz/core/internal/clients/telegram"
	"penahub.gitlab.yandexcloud.net/backend/tdlib/client"
	"strconv"
)

type Deps struct {
	DAL            *dal.DAL
	TelegramClient *telegram.TelegramClient
}

type Telegram struct {
	dal            *dal.DAL
	telegramClient *telegram.TelegramClient
}

func NewTelegramController(deps Deps) *Telegram {
	return &Telegram{
		dal:            deps.DAL,
		telegramClient: deps.TelegramClient,
	}
}

type Message struct {
	Type string `json:"type"`
	Data string `json:"data"`
}

func (r *Telegram) GetPoolTgAccounts(ctx *fiber.Ctx) error {
	allAccounts, err := r.dal.TgRepo.GetAllTgAccounts(ctx.Context())
	if err != nil {
		switch {
		case errors.Is(err, pj_errors.ErrNotFound):
			return ctx.Status(fiber.StatusNotFound).SendString("not found")
		default:
			return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
		}
	}
	return ctx.Status(fiber.StatusOK).JSON(allAccounts)
}

func (r *Telegram) AddingTgAccount(ctx *fiber.Ctx) error {
	var req telegram.AuthTgUserReq
	if err := ctx.BodyParser(&req); err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid request data")
	}
	if req.ApiID == 0 || req.ApiHash == "" || req.Password == "" || req.PhoneNumber == "" {
		return ctx.Status(fiber.StatusBadRequest).SendString("empty required fields")
	}
	allAccounts, err := r.dal.TgRepo.GetAllTgAccounts(ctx.Context())
	if err != nil && !errors.Is(err, pj_errors.ErrNotFound) {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}
	if !errors.Is(err, pj_errors.ErrNotFound) {
		for _, account := range allAccounts {
			if account.ApiID == req.ApiID && account.ApiHash == req.ApiHash && account.Status == model.ActiveTg {
				return ctx.Status(fiber.StatusConflict).SendString("this account already exist and active")
			}
		}
	}
	authorizer := client.ClientAuthorizerr()
	authorizer.TdlibParameters <- &client.SetTdlibParametersRequest{
		UseTestDc:           false,
		DatabaseDirectory:   filepath.Join(".tdlib", "database"),
		FilesDirectory:      filepath.Join(".tdlib", "files"),
		UseFileDatabase:     true,
		UseChatInfoDatabase: true,
		UseMessageDatabase:  true,
		UseSecretChats:      true,
		ApiId:               req.ApiID,
		ApiHash:             req.ApiHash,
		SystemLanguageCode:  "en",
		DeviceModel:         "Server",
		SystemVersion:       "1.0.0",
		ApplicationVersion:  "1.0.0",
	}

	_, err = client.SetLogVerbosityLevel(&client.SetLogVerbosityLevelRequest{
		NewVerbosityLevel: 1,
	})
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	var tdlibClient *client.Client
	// завершается уже в другом контроллере
	var goErr error
	// todo ужно продумать завершение горутины если код вставлять не пошли
	go func() {
		tdlibClient, goErr = client.NewClient(authorizer)
		if goErr != nil {
			fmt.Println("new client failed", err)
			return
		}
		r.telegramClient.SaveTgAccount(req.ApiID, req.ApiHash, tdlibClient)
		fmt.Println("i am down")
	}()
	if goErr != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(goErr.Error())
	}

	for {
		state, ok := <-authorizer.State
		if !ok {
			return ctx.Status(fiber.StatusOK).SendString("state chan is close auth maybe ok")
		}
		fmt.Println("currnet state:", state)
		switch state.AuthorizationStateType() {
		case client.TypeAuthorizationStateWaitPhoneNumber:
			authorizer.PhoneNumber <- req.PhoneNumber
		case client.TypeAuthorizationStateWaitCode:
			signature := xid.New()
			r.telegramClient.AddedToMap(telegram.WaitingClient{
				PreviousReq: req,
				Authorizer:  authorizer,
			}, signature.String())
			return ctx.Status(fiber.StatusOK).JSON(fiber.Map{"signature": signature.String()})

		case client.TypeAuthorizationStateLoggingOut, client.TypeAuthorizationStateClosing, client.TypeAuthorizationStateClosed:
			return ctx.Status(fiber.StatusForbidden).SendString(fmt.Sprintf("auth failed, last state is %s", state))
		}
	}
}

func (r *Telegram) SettingTgCode(ctx *fiber.Ctx) error {
	var req struct {
		Code      string `json:"code"`
		Signature string `json:"signature"`
	}
	if err := ctx.BodyParser(&req); err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid request data")
	}

	if req.Code == "" || req.Signature == "" {
		return ctx.Status(fiber.StatusBadRequest).SendString("empty required fields")
	}

	data, ok := r.telegramClient.GetFromMap(req.Signature)
	if !ok {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid id, don't have data")
	}
	data.Authorizer.Code <- req.Code
	for {
		state, ok := <-data.Authorizer.State
		if !ok {
			return ctx.Status(fiber.StatusNoContent).SendString("state chan is close auth maybe ok")
		}
		fmt.Println("currnet state:", state)
		switch state.AuthorizationStateType() {
		case client.TypeAuthorizationStateReady:
			id, err := r.dal.TgRepo.CreateTgAccount(ctx.Context(), model.TgAccount{
				ApiID:       data.PreviousReq.ApiID,
				ApiHash:     data.PreviousReq.ApiHash,
				PhoneNumber: data.PreviousReq.PhoneNumber,
				Status:      model.ActiveTg,
				Password:    data.PreviousReq.Password,
			})
			if err != nil {
				return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
			}
			return ctx.Status(fiber.StatusOK).JSON(fiber.Map{"id": id})
		case client.TypeAuthorizationStateWaitPassword:
			data.Authorizer.Password <- data.PreviousReq.Password
		case client.TypeAuthorizationStateLoggingOut, client.TypeAuthorizationStateClosing, client.TypeAuthorizationStateClosed:
			return ctx.Status(fiber.StatusForbidden).SendString(fmt.Sprintf("auth failed, last state is %s", state))
		}
	}
}

func (r *Telegram) DeleteTgAccountByID(ctx *fiber.Ctx) error {
	id, err := strconv.ParseInt(ctx.Params("id"), 10, 64)
	if err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("invalid id format")
	}
	err = r.dal.TgRepo.SoftDeleteTgAccount(ctx.Context(), id)
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}
	return ctx.SendStatus(fiber.StatusOK)
}