// Copyright 2018 Vulcanize
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package flip_kick

import (
	"encoding/json"
	"errors"
	"time"

	"github.com/ethereum/go-ethereum/accounts/abi/bind"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"

	"github.com/vulcanize/vulcanizedb/pkg/geth"
	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
)

type Converter interface {
	ToEntity(contractAddress string, contractAbi string, ethLog types.Log) (*FlipKickEntity, error)
	ToModel(flipKick FlipKickEntity) (FlipKickModel, error)
}

type FlipKickConverter struct{}

func (FlipKickConverter) ToEntity(contractAddress string, contractAbi string, ethLog types.Log) (*FlipKickEntity, error) {
	entity := &FlipKickEntity{}
	address := common.HexToAddress(contractAddress)
	abi, err := geth.ParseAbi(contractAbi)
	if err != nil {
		return entity, err
	}

	contract := bind.NewBoundContract(address, abi, nil, nil, nil)

	err = contract.UnpackLog(entity, "Kick", ethLog)
	if err != nil {
		return entity, err
	}
	entity.Raw = ethLog
	entity.TransactionIndex = ethLog.TxIndex
	return entity, nil
}

func (FlipKickConverter) ToModel(flipKick FlipKickEntity) (FlipKickModel, error) {
	if flipKick.Id == nil {
		return FlipKickModel{}, errors.New("FlipKick log ID cannot be nil.")
	}

	id := flipKick.Id.String()
	lot := shared.ConvertNilToEmptyString(flipKick.Lot.String())
	bid := shared.ConvertNilToEmptyString(flipKick.Bid.String())
	gal := flipKick.Gal.String()
	endValue := shared.ConvertNilToZeroTimeValue(flipKick.End)
	end := time.Unix(endValue, 0)
	urn := common.BytesToAddress(flipKick.Urn[:common.AddressLength]).String()
	tab := shared.ConvertNilToEmptyString(flipKick.Tab.String())
	rawLogJson, err := json.Marshal(flipKick.Raw)
	if err != nil {
		return FlipKickModel{}, err
	}
	rawLogString := string(rawLogJson)

	return FlipKickModel{
		BidId:            id,
		Lot:              lot,
		Bid:              bid,
		Gal:              gal,
		End:              end,
		Urn:              urn,
		Tab:              tab,
		TransactionIndex: flipKick.TransactionIndex,
		Raw:              rawLogString,
	}, nil
}