package account

import (
	"context"
	"fmt"

	"go.uber.org/zap"
	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/errors"
	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/models"
)

type accountRepository interface {
	FindByUserID(ctx context.Context, id string) (*models.Account, errors.Error)
	FindMany(ctx context.Context, page, limit int64) ([]models.Account, errors.Error)
	Insert(ctx context.Context, account *models.Account) (*models.Account, errors.Error)
	Remove(ctx context.Context, id string) (*models.Account, errors.Error)
	Delete(ctx context.Context, id string) (*models.Account, errors.Error)
}

type authClient interface {
	GetUser(ctx context.Context, userID string) (*models.User, errors.Error)
}

type Deps struct {
	Logger     *zap.Logger
	Repository accountRepository
	AuthClient authClient
}

type Service struct {
	logger     *zap.Logger
	repository accountRepository
	authClient authClient
}

func New(deps *Deps) *Service {
	return &Service{
		logger:     deps.Logger,
		repository: deps.Repository,
		authClient: deps.AuthClient,
	}
}

func (receiver *Service) GetAccountByUserID(ctx context.Context, userID string) (*models.Account, errors.Error) {
	account, err := receiver.repository.FindByUserID(ctx, userID)
	if err != nil {
		receiver.logger.Error("failed to get account by id on <GetAccountByUserID> of <AccountService>",
			zap.Error(err.Extract()),
			zap.String("userID", userID),
		)

		return nil, err
	}

	return account, nil
}

func (receiver *Service) GetAccountsList(ctx context.Context, pagination *models.Pagination) ([]models.Account, errors.Error) {
	if pagination == nil {
		return nil, errors.New(
			fmt.Errorf("pagination is nil on <GetAccountsList> of <AccountService>: %w", errors.ErrInternalError),
			errors.ErrInternalError,
		)
	}

	accounts, err := receiver.repository.FindMany(ctx, pagination.Page, pagination.Limit)
	if err != nil {
		receiver.logger.Error("failed to get accounts list on <GetAccountsList> of <AccountService>",
			zap.Error(err.Extract()),
			zap.Int64("page", pagination.Page),
			zap.Int64("limit", pagination.Limit),
		)

		return nil, err
	}

	return accounts, nil
}

func (receiver *Service) CreateAccount(ctx context.Context, account *models.Account) (*models.Account, errors.Error) {
	accounts, err := receiver.repository.Insert(ctx, account)
	if err != nil {
		receiver.logger.Error("failed to create account on <CreateAccount> of <AccountService>",
			zap.Error(err.Extract()),
			zap.Any("account", account),
		)

		return nil, err
	}

	return accounts, nil
}

/*
CreateAccountByUserID

TODO: Дополнить проверку на дефолтное значение Currency
*/
func (receiver *Service) CreateAccountByUserID(ctx context.Context, userID string) (*models.Account, errors.Error) {
	user, err := receiver.authClient.GetUser(ctx, userID)
	if err != nil {
		receiver.logger.Error("failed to get user on <CreateAccountByUserID> of <AccountService>",
			zap.Error(err.Extract()),
			zap.String("userID", userID),
		)

		return nil, err
	}

	account, err := receiver.repository.Insert(ctx, &models.Account{
		UserID: user.ID,
		Cart:   make([]string, 0),
		Wallet: models.Wallet{
			Cash:     0,
			Money:    0,
			Currency: "",
		},
	})
	if err != nil {
		receiver.logger.Error("failed to create account on <CreateAccountByUserID> of <AccountService>",
			zap.Error(err.Extract()),
			zap.String("userID", userID),
		)

		return nil, err
	}

	return account, nil
}

func (receiver *Service) RemoveAccount(ctx context.Context, userID string) (*models.Account, errors.Error) {
	account, err := receiver.repository.Remove(ctx, userID)
	if err != nil {
		receiver.logger.Error("failed to remove account on <RemoveAccount> of <AccountService>",
			zap.Error(err.Extract()),
			zap.String("userID", userID),
		)

		return nil, err
	}

	return account, nil
}

func (receiver *Service) DeleteAccount(ctx context.Context, userID string) (*models.Account, errors.Error) {
	account, err := receiver.repository.Delete(ctx, userID)
	if err != nil {
		receiver.logger.Error("failed to delete account on <DeleteAccount> of <AccountService>",
			zap.Error(err.Extract()),
			zap.String("userID", userID),
		)

		return nil, err
	}

	return account, nil
}