package wallet

import (
	"context"
	"errors"
	"time"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/event"
	"github.com/ethereum/go-ethereum/log"
)

type watchTransactionCommand struct {
	client *walletClient
	hash   common.Hash
	feed   *event.Feed
}

func (c *watchTransactionCommand) Command() Command {
	return FiniteCommand{
		Interval: 10 * time.Second,
		Runable:  c.Run,
	}.Run
}

func (c *watchTransactionCommand) Run(ctx context.Context) error {
	requestContext, cancel := context.WithTimeout(ctx, 10*time.Second)
	defer cancel()
	_, isPending, err := c.client.TransactionByHash(requestContext, c.hash)

	if err != nil {
		log.Error("Watching transaction error", "error", err)
		return err
	}

	if isPending {
		return errors.New("Transaction is pending")
	}

	return nil
}