// VulcanizeDB
// Copyright © 2019 Vulcanize

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.

// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package utils

import (
	"strconv"

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

const ExpectedRowLength = 5

type StorageDiff struct {
	Id           int
	Contract     common.Address
	BlockHash    common.Hash `db:"block_hash"`
	BlockHeight  int         `db:"block_height"`
	StorageKey   common.Hash `db:"storage_key"`
	StorageValue common.Hash `db:"storage_value"`
}

func FromStrings(csvRow []string) (StorageDiff, error) {
	if len(csvRow) != ExpectedRowLength {
		return StorageDiff{}, ErrRowMalformed{Length: len(csvRow)}
	}
	height, err := strconv.Atoi(csvRow[2])
	if err != nil {
		return StorageDiff{}, err
	}
	return StorageDiff{
		Contract:     common.HexToAddress(csvRow[0]),
		BlockHash:    common.HexToHash(csvRow[1]),
		BlockHeight:  height,
		StorageKey:   common.HexToHash(csvRow[3]),
		StorageValue: common.HexToHash(csvRow[4]),
	}, nil
}