package compliance

import (
	"fmt"
	"os"

	"github.com/cerc-io/eth-testing/chaindata/mainnet"
	"github.com/ethereum/go-ethereum/consensus/ethash"
	"github.com/ethereum/go-ethereum/core"
	"github.com/ethereum/go-ethereum/core/rawdb"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/core/vm"
)

var (
	chain  *core.BlockChain
	blocks []*types.Block
)

func loadChain() {
	db := rawdb.NewMemoryDatabase()
	core.DefaultGenesisBlock().MustCommit(db)
	blocks = mainnet.GetBlocks()
	chain, _ = core.NewBlockChain(db, nil, nil, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
	_, err := chain.InsertChain(blocks[1:])
	if err != nil {
		panic(err)
	}
}

func Main() {
	if len(os.Args) < 2 {
		fmt.Println("usage: dumpdiff <outputdir>")
		os.Exit(1)
	}

	outputDir := os.Args[1]

	_, err := os.Stat(outputDir)
	if os.IsNotExist(err) {
		err = os.MkdirAll(outputDir, 0755)
	}
	if err != nil {
		panic(err)
	}

	loadChain()
	WriteDiffs(outputDir, chain, blocks)
}