package config

import (
	"encoding/hex"

	log "github.com/sirupsen/logrus"

	"github.com/bytom/consensus"
	"github.com/bytom/protocol/bc"
	"github.com/bytom/protocol/bc/types"
)

func genesisTx() *types.Tx {
	contract, err := hex.DecodeString("00149514bf92cac8791dcc4cd7fd3ef4167ffc477f62")
	if err != nil {
		log.Panicf("fail on decode genesis tx output control program")
	}

	txData := types.TxData{
		Version: 1,
		Inputs: []*types.TxInput{
			types.NewCoinbaseInput([]byte("May 4th Be With You")),
		},
		Outputs: []*types.TxOutput{
			types.NewTxOutput(*consensus.BTMAssetID, consensus.InitialBlockSubsidy, contract),
		},
	}
	return types.NewTx(txData)
}

// GenesisBlock will return genesis block
func GenesisBlock() *types.Block {
	tx := genesisTx()
	txStatus := bc.NewTransactionStatus()
	txStatus.SetStatus(0, false)
	txStatusHash, err := bc.TxStatusMerkleRoot(txStatus.VerifyStatus)
	if err != nil {
		log.Panicf("fail on calc genesis tx status merkle root")
	}

	merkleRoot, err := bc.TxMerkleRoot([]*bc.Tx{tx.Tx})
	if err != nil {
		log.Panicf("fail on calc genesis tx merkel root")
	}

	block := &types.Block{
		BlockHeader: types.BlockHeader{
			Version:   1,
			Height:    0,
			Nonce:     2083236893,
			Timestamp: 1524202000,
			Bits:      2089670227111054243,
			BlockCommitment: types.BlockCommitment{
				TransactionsMerkleRoot: merkleRoot,
				TransactionStatusHash:  txStatusHash,
			},
		},
		Transactions: []*types.Tx{tx},
	}
	return block
}