package service

import (
	"context"
	"time"

	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
	"git.gocasts.ir/ebhomengo/niki/domain/wallet/param"
	"git.gocasts.ir/ebhomengo/niki/pkg/database/postgres"
	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
)

func (s Service) GetUserTransactionHistory(ctx context.Context, request param.TransactionRequest) (param.TransactionResponse, error) {
	const op = richerror.Op("wallet.service.GetUserTransactionHistory")
	lastTimeStamp := request.Pagination.LastTimeStamp
	if lastTimeStamp.IsZero() {
		lastTimeStamp = time.Now()
	}

	dbPagination := postgres.DBPagination{
		LastTimeStamp: lastTimeStamp,
		PageNumber:    request.Pagination.PageNumber,
		MaxNextPages:  s.cfg.MaxNextPages,
		PageSize:      s.cfg.PageSize,
	}

	transactionList, listLen, err := s.repo.GetTransactionListByUserID(ctx, request.UserID, dbPagination)

	showableNextPagesNum := postgres.ComputeNextPages(listLen, s.cfg.PageSize, s.cfg.MaxNextPages)

	if err != nil {
		return param.TransactionResponse{}, richerror.New(op).WithErr(err)
	}

	paginationInfo := postgres.ResponsePagination{
		PageNumber:           request.Pagination.PageNumber,
		PageSize:             s.cfg.PageSize,
		ShowableNextPagesNum: showableNextPagesNum,
	}

	return param.TransactionResponse{
		Transaction: transactionEntityToTransactionInfo(transactionList),
		Pagination:  paginationInfo,
	}, nil

}

func transactionEntityToTransactionInfo(TransactionList []entity.Transaction) []param.TransactionInfo {
	transactionInfoList := make([]param.TransactionInfo, len(TransactionList))
	for i, transaction := range TransactionList {
		transactionInfoList[i] = param.TransactionInfo{
			ID:         transaction.ID,
			UserID:     transaction.UserID,
			Amount:     transaction.Amount,
			Currency:   transaction.Currency,
			ActionType: transaction.ActionType,
			Timestamp:  transaction.Timestamp,
		}
	}

	return transactionInfoList

}