package service

import (
	"database/sql"
	"errors"
	"github.com/gofiber/fiber/v2"
	"penahub.gitlab.yandexcloud.net/backend/quiz/common.git/middleware"
	"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.git/brokers"
	"strconv"
	"time"
)

type CreateAccountReq struct {
	UserID string `json:"userId"`
}

type CreateAccountResp struct {
	CreatedAccount model.Account `json:"created_account"`
}

type DeleteAccountResp struct {
	DeletedAccountID string `json:"account_Id"`
}

type GetPrivilegeByUserIDReq struct {
	UserID string `json:"userId"`
}

type DeleteAccountByUserIDReq struct {
	UserID string `json:"userId"`
}

type DeleteAccountByUserIDResp struct {
	DeletedAccountUserID string `json:"userId"`
}

type GetAccountsReq struct {
	Limit uint64 `json:"limit"`
	Page  uint64 `json:"page"`
}

type GetAccountsResp struct {
	Count uint64          `json:"count"`
	Items []model.Account `json:"items"`
}

// getCurrentAccount обработчик для получения текущего аккаунта
func (s *Service) getCurrentAccount(ctx *fiber.Ctx) error {
	accountID, ok := middleware.GetAccountId(ctx)
	if !ok {
		return ctx.Status(fiber.StatusUnauthorized).SendString("account id is required")
	}

	account, err := s.dal.AccountRepo.GetAccountByID(ctx.Context(), accountID)
	if err != nil && err != sql.ErrNoRows {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	//TODO: fix this later
	if account.ID == "" {
		return ctx.Status(fiber.StatusNotFound).SendString("no account")
	}

	return ctx.Status(fiber.StatusOK).JSON(account)
}

// createAccount обработчик для создания нового аккаунта
func (s *Service) createAccount(ctx *fiber.Ctx) error {
	accountID, ok := middleware.GetAccountId(ctx)
	if !ok {
		return ctx.Status(fiber.StatusUnauthorized).SendString("account id is required")
	}

	existingAccount, err := s.dal.AccountRepo.GetAccountByID(ctx.Context(), accountID)
	if err != nil && err != sql.ErrNoRows {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}
	if existingAccount.ID != "" {
		return ctx.Status(fiber.StatusConflict).SendString("user with this ID already exists")
	}

	email, err := s.authClient.GetUserEmail(accountID)
	if err != nil {
		return err
	}

	newAccount := model.Account{
		UserID:    accountID,
		CreatedAt: time.Now(),
		Deleted:   false,
		Privileges: map[string]model.ShortPrivilege{
			"quizUnlimTime": {
				PrivilegeID:   "quizUnlimTime",
				PrivilegeName: "Безлимит Опросов",
				Amount:        14,
				CreatedAt:     time.Now(),
			},
		},
	}

	_, err = s.dal.AccountRepo.CreateAccount(ctx.Context(), &newAccount)
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	err = s.producer.ToMailNotify(ctx.Context(), brokers.Message{
		AccountID:  accountID,
		Email:      email,
		ServiceKey: s.serviceName,
		SendAt:     time.Now(),
	})

	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	return ctx.JSON(CreateAccountResp{
		CreatedAccount: newAccount,
	})
}

// deleteAccount обработчик для удаления текущего аккаунта
func (s *Service) deleteAccount(ctx *fiber.Ctx) error {
	accountID, ok := middleware.GetAccountId(ctx)
	if !ok {
		return ctx.Status(fiber.StatusUnauthorized).SendString("account id is required")
	}

	account, err := s.dal.AccountRepo.GetAccountByID(ctx.Context(), accountID)
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	if err := s.dal.AccountRepo.DeleteAccount(ctx.Context(), account.ID); err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	return ctx.JSON(DeleteAccountResp{
		DeletedAccountID: accountID,
	})
}

// getPrivilegeByUserID обработчик для получения привилегий аккаунта по ID пользователя
func (s *Service) getPrivilegeByUserID(ctx *fiber.Ctx) error {
	var req GetPrivilegeByUserIDReq
	if err := ctx.BodyParser(&req); err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid request data")
	}

	privilege, err := s.dal.AccountRepo.GetPrivilegesByAccountID(ctx.Context(), req.UserID)
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	return ctx.Status(fiber.StatusOK).JSON(privilege)
}

// deleteAccountByUserID обработчик для удаления аккаунта по ID пользователя
func (s *Service) deleteAccountByUserID(ctx *fiber.Ctx) error {
	var req DeleteAccountByUserIDReq
	if err := ctx.BodyParser(&req); err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid request data")
	}

	existingAccount, err := s.dal.AccountRepo.GetAccountByID(ctx.Context(), req.UserID)
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	if existingAccount.ID == "" {
		return ctx.Status(fiber.StatusInternalServerError).SendString("user with this ID not found")
	}

	if err := s.dal.AccountRepo.DeleteAccount(ctx.Context(), existingAccount.ID); err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	return ctx.JSON(DeleteAccountByUserIDResp{
		DeletedAccountUserID: req.UserID,
	})
}

// getAccounts обработчик для получения списка аккаунтов с пагинацией
func (s *Service) getAccounts(ctx *fiber.Ctx) error {
	var req GetAccountsReq
	if err := ctx.BodyParser(&req); err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid request data")
	}

	_, ok := middleware.GetAccountId(ctx)
	if !ok {
		return ctx.Status(fiber.StatusUnauthorized).SendString("account id is required")
	}

	accounts, totalCount, err := s.dal.AccountRepo.GetAccounts(ctx.Context(), req.Limit, req.Page)
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	response := GetAccountsResp{
		Count: totalCount,
		Items: accounts,
	}

	return ctx.Status(fiber.StatusOK).JSON(response)
}

func (s *Service) ManualDone(ctx *fiber.Ctx) error {
	var req struct {
		Id string `json:"id"`
	}
	if err := ctx.BodyParser(&req); err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid request data")
	}

	if req.Id == "" {
		return ctx.Status(fiber.StatusBadRequest).SendString("User id is required")
	}

	err := s.dal.AccountRepo.ManualDone(ctx.Context(), req.Id)
	if err != nil {
		if errors.Is(err, pj_errors.ErrNotFound) {
			return ctx.Status(fiber.StatusNotFound).SendString("user don't have this privilege")
		}
		return ctx.Status(fiber.StatusInternalServerError).SendString("Internal Server Error")
	}

	return ctx.SendStatus(fiber.StatusOK)
}

func (s *Service) PostLeadTarget(ctx *fiber.Ctx) error {
	var req struct {
		Type   string `json:"type"`
		QuizID int32  `json:"quizID"`
		Target string `json:"target"`
	}
	if err := ctx.BodyParser(&req); err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid request data")
	}

	accountID, ok := middleware.GetAccountId(ctx)
	if !ok {
		return ctx.Status(fiber.StatusUnauthorized).SendString("account id is required")
	}

	if req.Type == "" || req.Target == "" {
		return ctx.Status(fiber.StatusBadRequest).SendString("Type and Target don't be nil")
	}

	result, err := s.dal.AccountRepo.PostLeadTarget(ctx.Context(), model.LeadTarget{
		AccountID: accountID,
		Target:    req.Target,
		Type:      req.Type,
		QuizID:    req.QuizID,
	})
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}

	return ctx.Status(fiber.StatusOK).JSON(result)
}

func (s *Service) DeleteLeadTarget(ctx *fiber.Ctx) error {
	leadIDStr := ctx.Params("id")
	leadID, err := strconv.ParseInt(leadIDStr, 10, 64)
	if err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid lead ID format")
	}

	err = s.dal.AccountRepo.DeleteLeadTarget(ctx.Context(), leadID)
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
	}
	return ctx.SendStatus(fiber.StatusOK)
}

func (s *Service) GetLeadTarget(ctx *fiber.Ctx) error {
	accountID, ok := middleware.GetAccountId(ctx)
	if !ok {
		return ctx.Status(fiber.StatusUnauthorized).SendString("account id is required")
	}

	quizIDStr := ctx.Params("quizID")
	quizID, err := strconv.ParseInt(quizIDStr, 10, 64)
	if err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid quiz ID format")
	}

	result, err := s.dal.AccountRepo.GetLeadTarget(ctx.Context(), accountID, int32(quizID))
	if err != nil {
		switch {
		case errors.Is(err, pj_errors.ErrNotFound):
			return ctx.Status(fiber.StatusNotFound).SendString("this lead target not found")
		default:
			return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
		}

	}

	return ctx.Status(fiber.StatusOK).JSON(result)
}

func (s *Service) UpdateLeadTarget(ctx *fiber.Ctx) error {
	var req struct {
		ID     int64  `json:"id"`
		Target string `json:"target"`
	}

	if err := ctx.BodyParser(&req); err != nil {
		return ctx.Status(fiber.StatusBadRequest).SendString("Invalid request data")
	}

	if req.ID == 0 || req.Target == "" {
		return ctx.Status(fiber.StatusBadRequest).SendString("ID and Target don't be nil")
	}

	result, err := s.dal.AccountRepo.UpdateLeadTarget(ctx.Context(), model.LeadTarget{
		ID:     req.ID,
		Target: req.Target,
	})
	if err != nil {
		switch {
		case errors.Is(err, pj_errors.ErrNotFound):
			return ctx.Status(fiber.StatusNotFound).SendString("this lead target not found")
		default:
			return ctx.Status(fiber.StatusInternalServerError).SendString(err.Error())
		}
	}

	return ctx.Status(fiber.StatusOK).JSON(result)
}